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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 | |
5c3d29fc DF |
45 | static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, |
46 | struct ieee80211_tx_info *info, | |
47 | __le16 fc, __le32 *tx_flags) | |
48 | { | |
49 | if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || | |
50 | info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT || | |
51 | info->flags & IEEE80211_TX_CTL_AMPDU) | |
52 | *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; | |
53 | } | |
54 | ||
74bcdb33 WYG |
55 | /* |
56 | * handle build REPLY_TX command notification. | |
57 | */ | |
58 | static void iwlagn_tx_cmd_build_basic(struct iwl_priv *priv, | |
c6baf7fb JB |
59 | struct sk_buff *skb, |
60 | struct iwl_tx_cmd *tx_cmd, | |
61 | struct ieee80211_tx_info *info, | |
62 | struct ieee80211_hdr *hdr, u8 sta_id) | |
74bcdb33 WYG |
63 | { |
64 | __le16 fc = hdr->frame_control; | |
65 | __le32 tx_flags = tx_cmd->tx_flags; | |
66 | ||
67 | tx_cmd->stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
2c2def10 JB |
68 | |
69 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
74bcdb33 | 70 | tx_flags |= TX_CMD_FLG_ACK_MSK; |
2c2def10 JB |
71 | else |
72 | tx_flags &= ~TX_CMD_FLG_ACK_MSK; | |
74bcdb33 | 73 | |
2c2def10 JB |
74 | if (ieee80211_is_probe_resp(fc)) |
75 | tx_flags |= TX_CMD_FLG_TSF_MSK; | |
76 | else if (ieee80211_is_back_req(fc)) | |
74bcdb33 | 77 | tx_flags |= TX_CMD_FLG_ACK_MSK | TX_CMD_FLG_IMM_BA_RSP_MASK; |
d44ae69e | 78 | else if (info->band == IEEE80211_BAND_2GHZ && |
7cb1b088 WYG |
79 | priv->cfg->bt_params && |
80 | priv->cfg->bt_params->advanced_bt_coexist && | |
d44ae69e JB |
81 | (ieee80211_is_auth(fc) || ieee80211_is_assoc_req(fc) || |
82 | ieee80211_is_reassoc_req(fc) || | |
83 | skb->protocol == cpu_to_be16(ETH_P_PAE))) | |
84 | tx_flags |= TX_CMD_FLG_IGNORE_BT; | |
74bcdb33 WYG |
85 | |
86 | ||
c6baf7fb | 87 | tx_cmd->sta_id = sta_id; |
74bcdb33 WYG |
88 | if (ieee80211_has_morefrags(fc)) |
89 | tx_flags |= TX_CMD_FLG_MORE_FRAG_MSK; | |
90 | ||
91 | if (ieee80211_is_data_qos(fc)) { | |
92 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
93 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
94 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL_MSK; | |
95 | } else { | |
96 | tx_flags |= TX_CMD_FLG_SEQ_CTL_MSK; | |
97 | } | |
98 | ||
5c3d29fc | 99 | iwlagn_tx_cmd_protection(priv, info, fc, &tx_flags); |
74bcdb33 WYG |
100 | |
101 | tx_flags &= ~(TX_CMD_FLG_ANT_SEL_MSK); | |
102 | if (ieee80211_is_mgmt(fc)) { | |
103 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
104 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(3); | |
105 | else | |
106 | tx_cmd->timeout.pm_frame_timeout = cpu_to_le16(2); | |
107 | } else { | |
108 | tx_cmd->timeout.pm_frame_timeout = 0; | |
109 | } | |
110 | ||
111 | tx_cmd->driver_txop = 0; | |
112 | tx_cmd->tx_flags = tx_flags; | |
113 | tx_cmd->next_frame_len = 0; | |
114 | } | |
115 | ||
116 | #define RTS_DFAULT_RETRY_LIMIT 60 | |
117 | ||
118 | static void iwlagn_tx_cmd_build_rate(struct iwl_priv *priv, | |
c6baf7fb JB |
119 | struct iwl_tx_cmd *tx_cmd, |
120 | struct ieee80211_tx_info *info, | |
121 | __le16 fc) | |
74bcdb33 WYG |
122 | { |
123 | u32 rate_flags; | |
124 | int rate_idx; | |
125 | u8 rts_retry_limit; | |
126 | u8 data_retry_limit; | |
127 | u8 rate_plcp; | |
128 | ||
129 | /* Set retry limit on DATA packets and Probe Responses*/ | |
130 | if (ieee80211_is_probe_resp(fc)) | |
131 | data_retry_limit = 3; | |
132 | else | |
b744cb79 | 133 | data_retry_limit = IWLAGN_DEFAULT_TX_RETRY; |
74bcdb33 WYG |
134 | tx_cmd->data_retry_limit = data_retry_limit; |
135 | ||
136 | /* Set retry limit on RTS packets */ | |
137 | rts_retry_limit = RTS_DFAULT_RETRY_LIMIT; | |
138 | if (data_retry_limit < rts_retry_limit) | |
139 | rts_retry_limit = data_retry_limit; | |
140 | tx_cmd->rts_retry_limit = rts_retry_limit; | |
141 | ||
142 | /* DATA packets will use the uCode station table for rate/antenna | |
143 | * selection */ | |
144 | if (ieee80211_is_data(fc)) { | |
145 | tx_cmd->initial_rate_index = 0; | |
146 | tx_cmd->tx_flags |= TX_CMD_FLG_STA_RATE_MSK; | |
c10e2c10 | 147 | #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL |
4e308119 WYG |
148 | if (priv->tm_fixed_rate) { |
149 | /* | |
150 | * rate overwrite by testmode | |
151 | * we not only send lq command to change rate | |
152 | * we also re-enforce per data pkt base. | |
153 | */ | |
154 | tx_cmd->tx_flags &= ~TX_CMD_FLG_STA_RATE_MSK; | |
155 | memcpy(&tx_cmd->rate_n_flags, &priv->tm_fixed_rate, | |
156 | sizeof(tx_cmd->rate_n_flags)); | |
157 | } | |
c10e2c10 | 158 | #endif |
74bcdb33 WYG |
159 | return; |
160 | } | |
161 | ||
162 | /** | |
163 | * If the current TX rate stored in mac80211 has the MCS bit set, it's | |
164 | * not really a TX rate. Thus, we use the lowest supported rate for | |
165 | * this band. Also use the lowest supported rate if the stored rate | |
166 | * index is invalid. | |
167 | */ | |
168 | rate_idx = info->control.rates[0].idx; | |
169 | if (info->control.rates[0].flags & IEEE80211_TX_RC_MCS || | |
170 | (rate_idx < 0) || (rate_idx > IWL_RATE_COUNT_LEGACY)) | |
171 | rate_idx = rate_lowest_index(&priv->bands[info->band], | |
172 | info->control.sta); | |
173 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
174 | if (info->band == IEEE80211_BAND_5GHZ) | |
175 | rate_idx += IWL_FIRST_OFDM_RATE; | |
176 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
177 | rate_plcp = iwl_rates[rate_idx].plcp; | |
178 | /* Zero out flags for this packet */ | |
179 | rate_flags = 0; | |
180 | ||
181 | /* Set CCK flag as needed */ | |
182 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
183 | rate_flags |= RATE_MCS_CCK_MSK; | |
184 | ||
74bcdb33 | 185 | /* Set up antennas */ |
7cb1b088 WYG |
186 | if (priv->cfg->bt_params && |
187 | priv->cfg->bt_params->advanced_bt_coexist && | |
188 | priv->bt_full_concurrent) { | |
bee008b7 WYG |
189 | /* operated as 1x1 in full concurrency mode */ |
190 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
d6189124 | 191 | first_antenna(hw_params(priv).valid_tx_ant)); |
bee008b7 WYG |
192 | } else |
193 | priv->mgmt_tx_ant = iwl_toggle_tx_ant(priv, priv->mgmt_tx_ant, | |
d6189124 | 194 | hw_params(priv).valid_tx_ant); |
74bcdb33 WYG |
195 | rate_flags |= iwl_ant_idx_to_flags(priv->mgmt_tx_ant); |
196 | ||
197 | /* Set the rate in the TX cmd */ | |
198 | tx_cmd->rate_n_flags = iwl_hw_set_rate_n_flags(rate_plcp, rate_flags); | |
199 | } | |
200 | ||
201 | static void iwlagn_tx_cmd_build_hwcrypto(struct iwl_priv *priv, | |
202 | struct ieee80211_tx_info *info, | |
203 | struct iwl_tx_cmd *tx_cmd, | |
204 | struct sk_buff *skb_frag, | |
205 | int sta_id) | |
206 | { | |
207 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
208 | ||
97359d12 JB |
209 | switch (keyconf->cipher) { |
210 | case WLAN_CIPHER_SUITE_CCMP: | |
74bcdb33 WYG |
211 | tx_cmd->sec_ctl = TX_CMD_SEC_CCM; |
212 | memcpy(tx_cmd->key, keyconf->key, keyconf->keylen); | |
213 | if (info->flags & IEEE80211_TX_CTL_AMPDU) | |
214 | tx_cmd->tx_flags |= TX_CMD_FLG_AGG_CCMP_MSK; | |
215 | IWL_DEBUG_TX(priv, "tx_cmd with AES hwcrypto\n"); | |
216 | break; | |
217 | ||
97359d12 | 218 | case WLAN_CIPHER_SUITE_TKIP: |
74bcdb33 | 219 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; |
523b02ea | 220 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
74bcdb33 WYG |
221 | IWL_DEBUG_TX(priv, "tx_cmd with tkip hwcrypto\n"); |
222 | break; | |
223 | ||
97359d12 JB |
224 | case WLAN_CIPHER_SUITE_WEP104: |
225 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
226 | /* fall through */ | |
227 | case WLAN_CIPHER_SUITE_WEP40: | |
74bcdb33 WYG |
228 | tx_cmd->sec_ctl |= (TX_CMD_SEC_WEP | |
229 | (keyconf->keyidx & TX_CMD_SEC_MSK) << TX_CMD_SEC_SHIFT); | |
230 | ||
74bcdb33 WYG |
231 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); |
232 | ||
233 | IWL_DEBUG_TX(priv, "Configuring packet for WEP encryption " | |
234 | "with key %d\n", keyconf->keyidx); | |
235 | break; | |
236 | ||
237 | default: | |
97359d12 | 238 | IWL_ERR(priv, "Unknown encode cipher %x\n", keyconf->cipher); |
74bcdb33 WYG |
239 | break; |
240 | } | |
241 | } | |
242 | ||
243 | /* | |
244 | * start REPLY_TX command process | |
245 | */ | |
246 | int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) | |
247 | { | |
248 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
249 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
74bcdb33 | 250 | struct iwl_station_priv *sta_priv = NULL; |
a194e324 | 251 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; |
dfa2bdba | 252 | struct iwl_device_cmd *dev_cmd = NULL; |
47c1b496 | 253 | struct iwl_tx_cmd *tx_cmd; |
47c1b496 | 254 | |
74bcdb33 WYG |
255 | __le16 fc; |
256 | u8 hdr_len; | |
47c1b496 | 257 | u16 len; |
74bcdb33 | 258 | u8 sta_id; |
74bcdb33 | 259 | unsigned long flags; |
2e34034e | 260 | bool is_agg = false; |
74bcdb33 | 261 | |
c6baf7fb | 262 | if (info->control.vif) |
a194e324 JB |
263 | ctx = iwl_rxon_ctx_from_vif(info->control.vif); |
264 | ||
10b15e6f | 265 | spin_lock_irqsave(&priv->shrd->lock, flags); |
845a9c0d | 266 | if (iwl_is_rfkill(priv->shrd)) { |
74bcdb33 | 267 | IWL_DEBUG_DROP(priv, "Dropping - RF KILL\n"); |
2c46f72e | 268 | goto drop_unlock_priv; |
74bcdb33 WYG |
269 | } |
270 | ||
271 | fc = hdr->frame_control; | |
272 | ||
273 | #ifdef CONFIG_IWLWIFI_DEBUG | |
274 | if (ieee80211_is_auth(fc)) | |
275 | IWL_DEBUG_TX(priv, "Sending AUTH frame\n"); | |
276 | else if (ieee80211_is_assoc_req(fc)) | |
277 | IWL_DEBUG_TX(priv, "Sending ASSOC frame\n"); | |
278 | else if (ieee80211_is_reassoc_req(fc)) | |
279 | IWL_DEBUG_TX(priv, "Sending REASSOC frame\n"); | |
280 | #endif | |
281 | ||
282 | hdr_len = ieee80211_hdrlen(fc); | |
283 | ||
bfd36103 SG |
284 | /* For management frames use broadcast id to do not break aggregation */ |
285 | if (!ieee80211_is_data(fc)) | |
286 | sta_id = ctx->bcast_sta_id; | |
287 | else { | |
288 | /* Find index into station table for destination station */ | |
289 | sta_id = iwl_sta_id_or_broadcast(priv, ctx, info->control.sta); | |
290 | if (sta_id == IWL_INVALID_STATION) { | |
291 | IWL_DEBUG_DROP(priv, "Dropping - INVALID STATION: %pM\n", | |
292 | hdr->addr1); | |
e00cf3b9 | 293 | goto drop_unlock_priv; |
bfd36103 | 294 | } |
74bcdb33 WYG |
295 | } |
296 | ||
297 | IWL_DEBUG_TX(priv, "station Id %d\n", sta_id); | |
298 | ||
47c1b496 EG |
299 | if (info->control.sta) |
300 | sta_priv = (void *)info->control.sta->drv_priv; | |
74bcdb33 | 301 | |
67158b67 | 302 | if (sta_priv && sta_priv->asleep && |
47086fc5 | 303 | (info->flags & IEEE80211_TX_CTL_POLL_RESPONSE)) { |
74bcdb33 WYG |
304 | /* |
305 | * This sends an asynchronous command to the device, | |
306 | * but we can rely on it being processed before the | |
307 | * next frame is processed -- and the next frame to | |
308 | * this station is the one that will consume this | |
309 | * counter. | |
310 | * For now set the counter to just 1 since we do not | |
311 | * support uAPSD yet. | |
312 | */ | |
313 | iwl_sta_modify_sleep_tx_count(priv, sta_id, 1); | |
314 | } | |
315 | ||
08ecf104 EG |
316 | if (info->flags & IEEE80211_TX_CTL_AMPDU) |
317 | is_agg = true; | |
318 | ||
10b15e6f | 319 | /* irqs already disabled/saved above when locking priv->shrd->lock */ |
f39c95e8 | 320 | spin_lock(&priv->shrd->sta_lock); |
9c5ac091 | 321 | |
dfa2bdba EG |
322 | dev_cmd = kmem_cache_alloc(priv->tx_cmd_pool, GFP_ATOMIC); |
323 | ||
324 | if (unlikely(!dev_cmd)) | |
2c46f72e | 325 | goto drop_unlock_sta; |
74bcdb33 | 326 | |
dfa2bdba | 327 | memset(dev_cmd, 0, sizeof(*dev_cmd)); |
132f98c2 | 328 | tx_cmd = (struct iwl_tx_cmd *) dev_cmd->payload; |
dfa2bdba | 329 | |
74bcdb33 WYG |
330 | /* Total # bytes to be transmitted */ |
331 | len = (u16)skb->len; | |
332 | tx_cmd->len = cpu_to_le16(len); | |
333 | ||
334 | if (info->control.hw_key) | |
335 | iwlagn_tx_cmd_build_hwcrypto(priv, info, tx_cmd, skb, sta_id); | |
336 | ||
337 | /* TODO need this for burst mode later on */ | |
d44ae69e | 338 | iwlagn_tx_cmd_build_basic(priv, skb, tx_cmd, info, hdr, sta_id); |
74bcdb33 WYG |
339 | iwl_dbg_log_tx_data_frame(priv, len, hdr); |
340 | ||
341 | iwlagn_tx_cmd_build_rate(priv, tx_cmd, info, fc); | |
342 | ||
343 | iwl_update_stats(priv, true, fc, len); | |
74bcdb33 | 344 | |
1a849613 EG |
345 | memset(&info->status, 0, sizeof(info->status)); |
346 | ||
2c452297 | 347 | info->driver_data[0] = ctx; |
dfa2bdba | 348 | info->driver_data[1] = dev_cmd; |
2c452297 | 349 | |
e13c0c59 | 350 | if (iwl_trans_tx(trans(priv), skb, dev_cmd, ctx->ctxid, sta_id)) |
47c1b496 | 351 | goto drop_unlock_sta; |
2c46f72e | 352 | |
f39c95e8 | 353 | spin_unlock(&priv->shrd->sta_lock); |
10b15e6f | 354 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
74bcdb33 | 355 | |
2e34034e JB |
356 | /* |
357 | * Avoid atomic ops if it isn't an associated client. | |
358 | * Also, if this is a packet for aggregation, don't | |
359 | * increase the counter because the ucode will stop | |
360 | * aggregation queues when their respective station | |
361 | * goes to sleep. | |
362 | */ | |
363 | if (sta_priv && sta_priv->client && !is_agg) | |
74bcdb33 WYG |
364 | atomic_inc(&sta_priv->pending_frames); |
365 | ||
74bcdb33 WYG |
366 | return 0; |
367 | ||
2c46f72e | 368 | drop_unlock_sta: |
dfa2bdba EG |
369 | if (dev_cmd) |
370 | kmem_cache_free(priv->tx_cmd_pool, dev_cmd); | |
f39c95e8 | 371 | spin_unlock(&priv->shrd->sta_lock); |
2c46f72e | 372 | drop_unlock_priv: |
10b15e6f | 373 | spin_unlock_irqrestore(&priv->shrd->lock, flags); |
74bcdb33 WYG |
374 | return -1; |
375 | } | |
376 | ||
832f47e3 | 377 | int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 378 | struct ieee80211_sta *sta, u16 tid, u16 *ssn) |
74bcdb33 | 379 | { |
288712a6 | 380 | struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
74bcdb33 | 381 | int sta_id; |
74bcdb33 | 382 | int ret; |
74bcdb33 | 383 | |
5bc9890f WYG |
384 | IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n", |
385 | sta->addr, tid); | |
74bcdb33 | 386 | |
619753ff | 387 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
388 | if (sta_id == IWL_INVALID_STATION) { |
389 | IWL_ERR(priv, "Start AGG on invalid station\n"); | |
390 | return -ENXIO; | |
391 | } | |
5f85a789 | 392 | if (unlikely(tid >= IWL_MAX_TID_COUNT)) |
74bcdb33 WYG |
393 | return -EINVAL; |
394 | ||
5f85a789 | 395 | if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) { |
74bcdb33 WYG |
396 | IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n"); |
397 | return -ENXIO; | |
398 | } | |
399 | ||
288712a6 | 400 | ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid); |
74bcdb33 WYG |
401 | if (ret) |
402 | return ret; | |
403 | ||
288712a6 EG |
404 | ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id, |
405 | tid, ssn); | |
406 | ||
74bcdb33 WYG |
407 | return ret; |
408 | } | |
409 | ||
832f47e3 | 410 | int iwlagn_tx_agg_stop(struct iwl_priv *priv, struct ieee80211_vif *vif, |
619753ff | 411 | struct ieee80211_sta *sta, u16 tid) |
74bcdb33 | 412 | { |
7f01d567 EG |
413 | int sta_id; |
414 | struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; | |
74bcdb33 | 415 | |
619753ff | 416 | sta_id = iwl_sta_id(sta); |
74bcdb33 WYG |
417 | |
418 | if (sta_id == IWL_INVALID_STATION) { | |
419 | IWL_ERR(priv, "Invalid station for AGG tid %d\n", tid); | |
420 | return -ENXIO; | |
421 | } | |
422 | ||
7f01d567 EG |
423 | return iwl_trans_tx_agg_disable(trans(priv), vif_priv->ctx->ctxid, |
424 | sta_id, tid); | |
74bcdb33 WYG |
425 | } |
426 | ||
2e34034e JB |
427 | static void iwlagn_non_agg_tx_status(struct iwl_priv *priv, |
428 | struct iwl_rxon_context *ctx, | |
429 | const u8 *addr1) | |
74bcdb33 | 430 | { |
74bcdb33 WYG |
431 | struct ieee80211_sta *sta; |
432 | struct iwl_station_priv *sta_priv; | |
433 | ||
6db6340c | 434 | rcu_read_lock(); |
2e34034e | 435 | sta = ieee80211_find_sta(ctx->vif, addr1); |
74bcdb33 WYG |
436 | if (sta) { |
437 | sta_priv = (void *)sta->drv_priv; | |
438 | /* avoid atomic ops if this isn't a client */ | |
439 | if (sta_priv->client && | |
440 | atomic_dec_return(&sta_priv->pending_frames) == 0) | |
441 | ieee80211_sta_block_awake(priv->hw, sta, false); | |
442 | } | |
6db6340c | 443 | rcu_read_unlock(); |
2e34034e JB |
444 | } |
445 | ||
a0eaad71 EG |
446 | /** |
447 | * translate ucode response to mac80211 tx status control values | |
448 | */ | |
04e1cabe | 449 | static void iwlagn_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags, |
a0eaad71 | 450 | struct ieee80211_tx_info *info) |
2e34034e | 451 | { |
a0eaad71 | 452 | struct ieee80211_tx_rate *r = &info->control.rates[0]; |
74bcdb33 | 453 | |
a0eaad71 EG |
454 | info->antenna_sel_tx = |
455 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
456 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
457 | r->flags |= IEEE80211_TX_RC_MCS; | |
458 | if (rate_n_flags & RATE_MCS_GF_MSK) | |
459 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
460 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
461 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
462 | if (rate_n_flags & RATE_MCS_DUP_MSK) | |
463 | r->flags |= IEEE80211_TX_RC_DUP_DATA; | |
464 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
465 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
466 | r->idx = iwlagn_hwrate_to_mac80211_idx(rate_n_flags, info->band); | |
74bcdb33 WYG |
467 | } |
468 | ||
a0eaad71 EG |
469 | #ifdef CONFIG_IWLWIFI_DEBUG |
470 | const char *iwl_get_tx_fail_reason(u32 status) | |
74bcdb33 | 471 | { |
a0eaad71 EG |
472 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x |
473 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
74bcdb33 | 474 | |
a0eaad71 EG |
475 | switch (status & TX_STATUS_MSK) { |
476 | case TX_STATUS_SUCCESS: | |
477 | return "SUCCESS"; | |
478 | TX_STATUS_POSTPONE(DELAY); | |
479 | TX_STATUS_POSTPONE(FEW_BYTES); | |
480 | TX_STATUS_POSTPONE(BT_PRIO); | |
481 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
482 | TX_STATUS_POSTPONE(CALC_TTAK); | |
483 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
484 | TX_STATUS_FAIL(SHORT_LIMIT); | |
485 | TX_STATUS_FAIL(LONG_LIMIT); | |
486 | TX_STATUS_FAIL(FIFO_UNDERRUN); | |
487 | TX_STATUS_FAIL(DRAIN_FLOW); | |
488 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
489 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
490 | TX_STATUS_FAIL(DEST_PS); | |
491 | TX_STATUS_FAIL(HOST_ABORTED); | |
492 | TX_STATUS_FAIL(BT_RETRY); | |
493 | TX_STATUS_FAIL(STA_INVALID); | |
494 | TX_STATUS_FAIL(FRAG_DROPPED); | |
495 | TX_STATUS_FAIL(TID_DISABLE); | |
496 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
497 | TX_STATUS_FAIL(INSUFFICIENT_CF_POLL); | |
498 | TX_STATUS_FAIL(PASSIVE_NO_RX); | |
499 | TX_STATUS_FAIL(NO_BEACON_ON_RADAR); | |
74bcdb33 WYG |
500 | } |
501 | ||
a0eaad71 | 502 | return "UNKNOWN"; |
74bcdb33 | 503 | |
a0eaad71 EG |
504 | #undef TX_STATUS_FAIL |
505 | #undef TX_STATUS_POSTPONE | |
506 | } | |
507 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
b2502698 | 508 | |
04e1cabe EG |
509 | static void iwlagn_count_agg_tx_err_status(struct iwl_priv *priv, u16 status) |
510 | { | |
511 | status &= AGG_TX_STATUS_MSK; | |
512 | ||
513 | switch (status) { | |
514 | case AGG_TX_STATE_UNDERRUN_MSK: | |
515 | priv->reply_agg_tx_stats.underrun++; | |
516 | break; | |
517 | case AGG_TX_STATE_BT_PRIO_MSK: | |
518 | priv->reply_agg_tx_stats.bt_prio++; | |
519 | break; | |
520 | case AGG_TX_STATE_FEW_BYTES_MSK: | |
521 | priv->reply_agg_tx_stats.few_bytes++; | |
522 | break; | |
523 | case AGG_TX_STATE_ABORT_MSK: | |
524 | priv->reply_agg_tx_stats.abort++; | |
525 | break; | |
526 | case AGG_TX_STATE_LAST_SENT_TTL_MSK: | |
527 | priv->reply_agg_tx_stats.last_sent_ttl++; | |
528 | break; | |
529 | case AGG_TX_STATE_LAST_SENT_TRY_CNT_MSK: | |
530 | priv->reply_agg_tx_stats.last_sent_try++; | |
531 | break; | |
532 | case AGG_TX_STATE_LAST_SENT_BT_KILL_MSK: | |
533 | priv->reply_agg_tx_stats.last_sent_bt_kill++; | |
534 | break; | |
535 | case AGG_TX_STATE_SCD_QUERY_MSK: | |
536 | priv->reply_agg_tx_stats.scd_query++; | |
537 | break; | |
538 | case AGG_TX_STATE_TEST_BAD_CRC32_MSK: | |
539 | priv->reply_agg_tx_stats.bad_crc32++; | |
540 | break; | |
541 | case AGG_TX_STATE_RESPONSE_MSK: | |
542 | priv->reply_agg_tx_stats.response++; | |
543 | break; | |
544 | case AGG_TX_STATE_DUMP_TX_MSK: | |
545 | priv->reply_agg_tx_stats.dump_tx++; | |
546 | break; | |
547 | case AGG_TX_STATE_DELAY_TX_MSK: | |
548 | priv->reply_agg_tx_stats.delay_tx++; | |
549 | break; | |
550 | default: | |
551 | priv->reply_agg_tx_stats.unknown++; | |
552 | break; | |
553 | } | |
554 | } | |
555 | ||
a0eaad71 EG |
556 | static void iwl_rx_reply_tx_agg(struct iwl_priv *priv, |
557 | struct iwlagn_tx_resp *tx_resp) | |
558 | { | |
559 | struct agg_tx_status *frame_status = &tx_resp->status; | |
560 | int tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> | |
561 | IWLAGN_TX_RES_TID_POS; | |
562 | int sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> | |
563 | IWLAGN_TX_RES_RA_POS; | |
5f85a789 | 564 | struct iwl_ht_agg *agg = &priv->shrd->tid_data[sta_id][tid].agg; |
a0eaad71 EG |
565 | u32 status = le16_to_cpu(tx_resp->status.status); |
566 | int i; | |
567 | ||
568 | if (agg->wait_for_ba) | |
569 | IWL_DEBUG_TX_REPLY(priv, | |
570 | "got tx response w/o block-ack\n"); | |
74bcdb33 | 571 | |
a0eaad71 EG |
572 | agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); |
573 | agg->wait_for_ba = (tx_resp->frame_count > 1); | |
574 | ||
575 | /* | |
576 | * If the BT kill count is non-zero, we'll get this | |
577 | * notification again. | |
578 | */ | |
579 | if (tx_resp->bt_kill_count && tx_resp->frame_count == 1 && | |
580 | priv->cfg->bt_params && | |
581 | priv->cfg->bt_params->advanced_bt_coexist) { | |
582 | IWL_DEBUG_COEX(priv, "receive reply tx w/ bt_kill\n"); | |
583 | } | |
b2502698 | 584 | |
1a849613 EG |
585 | if (tx_resp->frame_count == 1) |
586 | return; | |
587 | ||
a0eaad71 EG |
588 | /* Construct bit-map of pending frames within Tx window */ |
589 | for (i = 0; i < tx_resp->frame_count; i++) { | |
590 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
74bcdb33 | 591 | |
a0eaad71 EG |
592 | if (status & AGG_TX_STATUS_MSK) |
593 | iwlagn_count_agg_tx_err_status(priv, fstatus); | |
74bcdb33 | 594 | |
a0eaad71 EG |
595 | if (status & (AGG_TX_STATE_FEW_BYTES_MSK | |
596 | AGG_TX_STATE_ABORT_MSK)) | |
597 | continue; | |
598 | ||
599 | IWL_DEBUG_TX_REPLY(priv, "status %s (0x%08x), " | |
600 | "try-count (0x%08x)\n", | |
601 | iwl_get_agg_tx_fail_reason(fstatus), | |
602 | fstatus & AGG_TX_STATUS_MSK, | |
603 | fstatus & AGG_TX_TRY_MSK); | |
74bcdb33 | 604 | } |
74bcdb33 WYG |
605 | } |
606 | ||
04e1cabe EG |
607 | #ifdef CONFIG_IWLWIFI_DEBUG |
608 | #define AGG_TX_STATE_FAIL(x) case AGG_TX_STATE_ ## x: return #x | |
609 | ||
610 | const char *iwl_get_agg_tx_fail_reason(u16 status) | |
611 | { | |
612 | status &= AGG_TX_STATUS_MSK; | |
613 | switch (status) { | |
614 | case AGG_TX_STATE_TRANSMITTED: | |
615 | return "SUCCESS"; | |
616 | AGG_TX_STATE_FAIL(UNDERRUN_MSK); | |
617 | AGG_TX_STATE_FAIL(BT_PRIO_MSK); | |
618 | AGG_TX_STATE_FAIL(FEW_BYTES_MSK); | |
619 | AGG_TX_STATE_FAIL(ABORT_MSK); | |
620 | AGG_TX_STATE_FAIL(LAST_SENT_TTL_MSK); | |
621 | AGG_TX_STATE_FAIL(LAST_SENT_TRY_CNT_MSK); | |
622 | AGG_TX_STATE_FAIL(LAST_SENT_BT_KILL_MSK); | |
623 | AGG_TX_STATE_FAIL(SCD_QUERY_MSK); | |
624 | AGG_TX_STATE_FAIL(TEST_BAD_CRC32_MSK); | |
625 | AGG_TX_STATE_FAIL(RESPONSE_MSK); | |
626 | AGG_TX_STATE_FAIL(DUMP_TX_MSK); | |
627 | AGG_TX_STATE_FAIL(DELAY_TX_MSK); | |
628 | } | |
629 | ||
630 | return "UNKNOWN"; | |
631 | } | |
632 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
633 | ||
a0eaad71 EG |
634 | static inline u32 iwlagn_get_scd_ssn(struct iwlagn_tx_resp *tx_resp) |
635 | { | |
636 | return le32_to_cpup((__le32 *)&tx_resp->status + | |
637 | tx_resp->frame_count) & MAX_SN; | |
638 | } | |
74bcdb33 | 639 | |
04e1cabe EG |
640 | static void iwlagn_count_tx_err_status(struct iwl_priv *priv, u16 status) |
641 | { | |
642 | status &= TX_STATUS_MSK; | |
643 | ||
644 | switch (status) { | |
645 | case TX_STATUS_POSTPONE_DELAY: | |
646 | priv->reply_tx_stats.pp_delay++; | |
647 | break; | |
648 | case TX_STATUS_POSTPONE_FEW_BYTES: | |
649 | priv->reply_tx_stats.pp_few_bytes++; | |
650 | break; | |
651 | case TX_STATUS_POSTPONE_BT_PRIO: | |
652 | priv->reply_tx_stats.pp_bt_prio++; | |
653 | break; | |
654 | case TX_STATUS_POSTPONE_QUIET_PERIOD: | |
655 | priv->reply_tx_stats.pp_quiet_period++; | |
656 | break; | |
657 | case TX_STATUS_POSTPONE_CALC_TTAK: | |
658 | priv->reply_tx_stats.pp_calc_ttak++; | |
659 | break; | |
660 | case TX_STATUS_FAIL_INTERNAL_CROSSED_RETRY: | |
661 | priv->reply_tx_stats.int_crossed_retry++; | |
662 | break; | |
663 | case TX_STATUS_FAIL_SHORT_LIMIT: | |
664 | priv->reply_tx_stats.short_limit++; | |
665 | break; | |
666 | case TX_STATUS_FAIL_LONG_LIMIT: | |
667 | priv->reply_tx_stats.long_limit++; | |
668 | break; | |
669 | case TX_STATUS_FAIL_FIFO_UNDERRUN: | |
670 | priv->reply_tx_stats.fifo_underrun++; | |
671 | break; | |
672 | case TX_STATUS_FAIL_DRAIN_FLOW: | |
673 | priv->reply_tx_stats.drain_flow++; | |
674 | break; | |
675 | case TX_STATUS_FAIL_RFKILL_FLUSH: | |
676 | priv->reply_tx_stats.rfkill_flush++; | |
677 | break; | |
678 | case TX_STATUS_FAIL_LIFE_EXPIRE: | |
679 | priv->reply_tx_stats.life_expire++; | |
680 | break; | |
681 | case TX_STATUS_FAIL_DEST_PS: | |
682 | priv->reply_tx_stats.dest_ps++; | |
683 | break; | |
684 | case TX_STATUS_FAIL_HOST_ABORTED: | |
685 | priv->reply_tx_stats.host_abort++; | |
686 | break; | |
687 | case TX_STATUS_FAIL_BT_RETRY: | |
688 | priv->reply_tx_stats.bt_retry++; | |
689 | break; | |
690 | case TX_STATUS_FAIL_STA_INVALID: | |
691 | priv->reply_tx_stats.sta_invalid++; | |
692 | break; | |
693 | case TX_STATUS_FAIL_FRAG_DROPPED: | |
694 | priv->reply_tx_stats.frag_drop++; | |
695 | break; | |
696 | case TX_STATUS_FAIL_TID_DISABLE: | |
697 | priv->reply_tx_stats.tid_disable++; | |
698 | break; | |
699 | case TX_STATUS_FAIL_FIFO_FLUSHED: | |
700 | priv->reply_tx_stats.fifo_flush++; | |
701 | break; | |
702 | case TX_STATUS_FAIL_INSUFFICIENT_CF_POLL: | |
703 | priv->reply_tx_stats.insuff_cf_poll++; | |
704 | break; | |
705 | case TX_STATUS_FAIL_PASSIVE_NO_RX: | |
706 | priv->reply_tx_stats.fail_hw_drop++; | |
707 | break; | |
708 | case TX_STATUS_FAIL_NO_BEACON_ON_RADAR: | |
709 | priv->reply_tx_stats.sta_color_mismatch++; | |
710 | break; | |
711 | default: | |
712 | priv->reply_tx_stats.unknown++; | |
713 | break; | |
714 | } | |
715 | } | |
716 | ||
717 | static void iwlagn_set_tx_status(struct iwl_priv *priv, | |
718 | struct ieee80211_tx_info *info, | |
719 | struct iwlagn_tx_resp *tx_resp, | |
720 | bool is_agg) | |
721 | { | |
722 | u16 status = le16_to_cpu(tx_resp->status.status); | |
723 | ||
724 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
725 | if (is_agg) | |
726 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
727 | info->flags |= iwl_tx_status_to_mac80211(status); | |
728 | iwlagn_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags), | |
729 | info); | |
730 | if (!iwl_is_tx_success(status)) | |
731 | iwlagn_count_tx_err_status(priv, status); | |
732 | } | |
733 | ||
734 | static void iwl_check_abort_status(struct iwl_priv *priv, | |
735 | u8 frame_count, u32 status) | |
736 | { | |
737 | if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { | |
738 | IWL_ERR(priv, "Tx flush command to flush out all frames\n"); | |
739 | if (!test_bit(STATUS_EXIT_PENDING, &priv->shrd->status)) | |
740 | queue_work(priv->shrd->workqueue, &priv->tx_flush); | |
741 | } | |
742 | } | |
743 | ||
247c61d6 EG |
744 | int iwlagn_rx_reply_tx(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb, |
745 | struct iwl_device_cmd *cmd) | |
74bcdb33 | 746 | { |
a0eaad71 EG |
747 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
748 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
749 | int txq_id = SEQ_TO_QUEUE(sequence); | |
ff620849 | 750 | int cmd_index __maybe_unused = SEQ_TO_INDEX(sequence); |
a0eaad71 EG |
751 | struct iwlagn_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; |
752 | struct ieee80211_hdr *hdr; | |
753 | u32 status = le16_to_cpu(tx_resp->status.status); | |
754 | u32 ssn = iwlagn_get_scd_ssn(tx_resp); | |
755 | int tid; | |
756 | int sta_id; | |
757 | int freed; | |
74bcdb33 | 758 | struct ieee80211_tx_info *info; |
a0eaad71 EG |
759 | unsigned long flags; |
760 | struct sk_buff_head skbs; | |
761 | struct sk_buff *skb; | |
762 | struct iwl_rxon_context *ctx; | |
8ad71bef | 763 | bool is_agg = (txq_id >= IWLAGN_FIRST_AMPDU_QUEUE); |
d0eb6334 | 764 | |
a0eaad71 EG |
765 | tid = (tx_resp->ra_tid & IWLAGN_TX_RES_TID_MSK) >> |
766 | IWLAGN_TX_RES_TID_POS; | |
767 | sta_id = (tx_resp->ra_tid & IWLAGN_TX_RES_RA_MSK) >> | |
768 | IWLAGN_TX_RES_RA_POS; | |
9decde95 | 769 | |
a0eaad71 | 770 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
9decde95 | 771 | |
8ad71bef | 772 | if (is_agg) |
a0eaad71 EG |
773 | iwl_rx_reply_tx_agg(priv, tx_resp); |
774 | ||
775 | if (tx_resp->frame_count == 1) { | |
a0eaad71 EG |
776 | __skb_queue_head_init(&skbs); |
777 | /*we can free until ssn % q.n_bd not inclusive */ | |
464021ff EG |
778 | iwl_trans_reclaim(trans(priv), sta_id, tid, txq_id, |
779 | ssn, status, &skbs); | |
a0eaad71 EG |
780 | freed = 0; |
781 | while (!skb_queue_empty(&skbs)) { | |
782 | skb = __skb_dequeue(&skbs); | |
783 | hdr = (struct ieee80211_hdr *)skb->data; | |
784 | ||
785 | if (!ieee80211_is_data_qos(hdr->frame_control)) | |
786 | priv->last_seq_ctl = tx_resp->seq_ctl; | |
787 | ||
788 | info = IEEE80211_SKB_CB(skb); | |
789 | ctx = info->driver_data[0]; | |
dfa2bdba EG |
790 | kmem_cache_free(priv->tx_cmd_pool, |
791 | (info->driver_data[1])); | |
a0eaad71 EG |
792 | |
793 | memset(&info->status, 0, sizeof(info->status)); | |
794 | ||
795 | if (status == TX_STATUS_FAIL_PASSIVE_NO_RX && | |
796 | iwl_is_associated_ctx(ctx) && ctx->vif && | |
797 | ctx->vif->type == NL80211_IFTYPE_STATION) { | |
798 | ctx->last_tx_rejected = true; | |
e20d4341 | 799 | iwl_trans_stop_queue(trans(priv), txq_id); |
a0eaad71 EG |
800 | |
801 | IWL_DEBUG_TX_REPLY(priv, | |
802 | "TXQ %d status %s (0x%08x) " | |
803 | "rate_n_flags 0x%x retries %d\n", | |
804 | txq_id, | |
805 | iwl_get_tx_fail_reason(status), | |
806 | status, | |
807 | le32_to_cpu(tx_resp->rate_n_flags), | |
808 | tx_resp->failure_frame); | |
809 | ||
810 | IWL_DEBUG_TX_REPLY(priv, | |
811 | "FrameCnt = %d, idx=%d\n", | |
812 | tx_resp->frame_count, cmd_index); | |
813 | } | |
814 | ||
815 | /* check if BAR is needed */ | |
816 | if (is_agg && !iwl_is_tx_success(status)) | |
817 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
818 | iwlagn_set_tx_status(priv, IEEE80211_SKB_CB(skb), | |
819 | tx_resp, is_agg); | |
820 | if (!is_agg) | |
821 | iwlagn_non_agg_tx_status(priv, ctx, hdr->addr1); | |
822 | ||
823 | ieee80211_tx_status_irqsafe(priv->hw, skb); | |
824 | ||
825 | freed++; | |
826 | } | |
74bcdb33 | 827 | |
a0eaad71 | 828 | WARN_ON(!is_agg && freed != 1); |
a0eaad71 | 829 | } |
8d801080 | 830 | |
a0eaad71 EG |
831 | iwl_check_abort_status(priv, tx_resp->frame_count, status); |
832 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | |
247c61d6 | 833 | return 0; |
8d801080 WYG |
834 | } |
835 | ||
74bcdb33 WYG |
836 | /** |
837 | * iwlagn_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA | |
838 | * | |
839 | * Handles block-acknowledge notification from device, which reports success | |
840 | * of frames sent via aggregation. | |
841 | */ | |
247c61d6 EG |
842 | int iwlagn_rx_reply_compressed_ba(struct iwl_priv *priv, |
843 | struct iwl_rx_mem_buffer *rxb, | |
844 | struct iwl_device_cmd *cmd) | |
74bcdb33 WYG |
845 | { |
846 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
847 | struct iwl_compressed_ba_resp *ba_resp = &pkt->u.compressed_ba; | |
74bcdb33 | 848 | struct iwl_ht_agg *agg; |
a0eaad71 EG |
849 | struct sk_buff_head reclaimed_skbs; |
850 | struct ieee80211_tx_info *info; | |
851 | struct ieee80211_hdr *hdr; | |
852 | struct sk_buff *skb; | |
853 | unsigned long flags; | |
74bcdb33 WYG |
854 | int sta_id; |
855 | int tid; | |
a0eaad71 | 856 | int freed; |
74bcdb33 WYG |
857 | |
858 | /* "flow" corresponds to Tx queue */ | |
859 | u16 scd_flow = le16_to_cpu(ba_resp->scd_flow); | |
860 | ||
861 | /* "ssn" is start of block-ack Tx window, corresponds to index | |
862 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
863 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn); | |
864 | ||
d6189124 | 865 | if (scd_flow >= hw_params(priv).max_txq_num) { |
74bcdb33 WYG |
866 | IWL_ERR(priv, |
867 | "BUG_ON scd_flow is bigger than number of queues\n"); | |
247c61d6 | 868 | return 0; |
74bcdb33 WYG |
869 | } |
870 | ||
74bcdb33 WYG |
871 | sta_id = ba_resp->sta_id; |
872 | tid = ba_resp->tid; | |
5f85a789 | 873 | agg = &priv->shrd->tid_data[sta_id][tid].agg; |
a0eaad71 | 874 | |
a0eaad71 EG |
875 | spin_lock_irqsave(&priv->shrd->sta_lock, flags); |
876 | ||
b561e827 | 877 | if (unlikely(agg->txq_id != scd_flow)) { |
735df29a WYG |
878 | /* |
879 | * FIXME: this is a uCode bug which need to be addressed, | |
880 | * log the information and return for now! | |
881 | * since it is possible happen very often and in order | |
882 | * not to fill the syslog, don't enable the logging by default | |
883 | */ | |
884 | IWL_DEBUG_TX_REPLY(priv, | |
885 | "BA scd_flow %d does not match txq_id %d\n", | |
b561e827 | 886 | scd_flow, agg->txq_id); |
a0eaad71 | 887 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
247c61d6 | 888 | return 0; |
b561e827 | 889 | } |
74bcdb33 | 890 | |
a0eaad71 EG |
891 | if (unlikely(!agg->wait_for_ba)) { |
892 | if (unlikely(ba_resp->bitmap)) | |
893 | IWL_ERR(priv, "Received BA when not expected\n"); | |
894 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); | |
247c61d6 | 895 | return 0; |
a0eaad71 | 896 | } |
74bcdb33 WYG |
897 | |
898 | IWL_DEBUG_TX_REPLY(priv, "REPLY_COMPRESSED_BA [%d] Received from %pM, " | |
899 | "sta_id = %d\n", | |
900 | agg->wait_for_ba, | |
901 | (u8 *) &ba_resp->sta_addr_lo32, | |
902 | ba_resp->sta_id); | |
a0eaad71 EG |
903 | IWL_DEBUG_TX_REPLY(priv, "TID = %d, SeqCtl = %d, bitmap = 0x%llx, " |
904 | "scd_flow = %d, scd_ssn = %d\n", | |
74bcdb33 WYG |
905 | ba_resp->tid, |
906 | ba_resp->seq_ctl, | |
907 | (unsigned long long)le64_to_cpu(ba_resp->bitmap), | |
908 | ba_resp->scd_flow, | |
909 | ba_resp->scd_ssn); | |
74bcdb33 | 910 | |
a0eaad71 | 911 | /* Mark that the expected block-ack response arrived */ |
21023e26 | 912 | agg->wait_for_ba = false; |
a0eaad71 EG |
913 | |
914 | /* Sanity check values reported by uCode */ | |
915 | if (ba_resp->txed_2_done > ba_resp->txed) { | |
916 | IWL_DEBUG_TX_REPLY(priv, | |
917 | "bogus sent(%d) and ack(%d) count\n", | |
918 | ba_resp->txed, ba_resp->txed_2_done); | |
919 | /* | |
920 | * set txed_2_done = txed, | |
921 | * so it won't impact rate scale | |
922 | */ | |
923 | ba_resp->txed = ba_resp->txed_2_done; | |
924 | } | |
925 | IWL_DEBUG_HT(priv, "agg frames sent:%d, acked:%d\n", | |
926 | ba_resp->txed, ba_resp->txed_2_done); | |
927 | ||
928 | __skb_queue_head_init(&reclaimed_skbs); | |
74bcdb33 WYG |
929 | |
930 | /* Release all TFDs before the SSN, i.e. all TFDs in front of | |
931 | * block-ack window (we assume that they've been successfully | |
932 | * transmitted ... if not, it's too late anyway). */ | |
464021ff EG |
933 | iwl_trans_reclaim(trans(priv), sta_id, tid, scd_flow, ba_resp_scd_ssn, |
934 | 0, &reclaimed_skbs); | |
a0eaad71 EG |
935 | freed = 0; |
936 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
74bcdb33 | 937 | |
a0eaad71 EG |
938 | skb = __skb_dequeue(&reclaimed_skbs); |
939 | hdr = (struct ieee80211_hdr *)skb->data; | |
69fdb710 | 940 | |
a0eaad71 EG |
941 | if (ieee80211_is_data_qos(hdr->frame_control)) |
942 | freed++; | |
943 | else | |
944 | WARN_ON_ONCE(1); | |
945 | ||
1a849613 EG |
946 | info = IEEE80211_SKB_CB(skb); |
947 | kmem_cache_free(priv->tx_cmd_pool, (info->driver_data[1])); | |
948 | ||
949 | if (freed == 1) { | |
a0eaad71 EG |
950 | /* this is the first skb we deliver in this batch */ |
951 | /* put the rate scaling data there */ | |
952 | info = IEEE80211_SKB_CB(skb); | |
953 | memset(&info->status, 0, sizeof(info->status)); | |
954 | info->flags |= IEEE80211_TX_STAT_ACK; | |
955 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
956 | info->status.ampdu_ack_len = ba_resp->txed_2_done; | |
957 | info->status.ampdu_len = ba_resp->txed; | |
958 | iwlagn_hwrate_to_tx_control(priv, agg->rate_n_flags, | |
959 | info); | |
960 | } | |
69fdb710 | 961 | |
a0eaad71 | 962 | ieee80211_tx_status_irqsafe(priv->hw, skb); |
69fdb710 JB |
963 | } |
964 | ||
a0eaad71 | 965 | spin_unlock_irqrestore(&priv->shrd->sta_lock, flags); |
247c61d6 | 966 | return 0; |
69fdb710 | 967 | } |