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8ca151b5 JB |
1 | /****************************************************************************** |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
51368bf7 | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
4203263d | 9 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
532beba3 | 10 | * Copyright(c) 2016 Intel Deutschland GmbH |
8ca151b5 JB |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of version 2 of the GNU General Public License as | |
14 | * published by the Free Software Foundation. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
24 | * USA | |
25 | * | |
26 | * The full GNU General Public License is included in this distribution | |
410dc5aa | 27 | * in the file called COPYING. |
8ca151b5 JB |
28 | * |
29 | * Contact Information: | |
cb2f8277 | 30 | * Intel Linux Wireless <linuxwifi@intel.com> |
8ca151b5 JB |
31 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
32 | * | |
33 | * BSD LICENSE | |
34 | * | |
51368bf7 | 35 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
4203263d | 36 | * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH |
8ca151b5 JB |
37 | * All rights reserved. |
38 | * | |
39 | * Redistribution and use in source and binary forms, with or without | |
40 | * modification, are permitted provided that the following conditions | |
41 | * are met: | |
42 | * | |
43 | * * Redistributions of source code must retain the above copyright | |
44 | * notice, this list of conditions and the following disclaimer. | |
45 | * * Redistributions in binary form must reproduce the above copyright | |
46 | * notice, this list of conditions and the following disclaimer in | |
47 | * the documentation and/or other materials provided with the | |
48 | * distribution. | |
49 | * * Neither the name Intel Corporation nor the names of its | |
50 | * contributors may be used to endorse or promote products derived | |
51 | * from this software without specific prior written permission. | |
52 | * | |
53 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
54 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
55 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
56 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
57 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
58 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
59 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
60 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
61 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
62 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
63 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
64 | * | |
65 | *****************************************************************************/ | |
66 | #include <linux/ieee80211.h> | |
67 | #include <linux/etherdevice.h> | |
a3713f8b | 68 | #include <linux/tcp.h> |
a6d5e32f | 69 | #include <net/ip.h> |
5e6a98dc | 70 | #include <net/ipv6.h> |
8ca151b5 JB |
71 | |
72 | #include "iwl-trans.h" | |
73 | #include "iwl-eeprom-parse.h" | |
74 | #include "mvm.h" | |
75 | #include "sta.h" | |
2f89a5d7 | 76 | #include "fw-dbg.h" |
8ca151b5 | 77 | |
4203263d EG |
78 | static void |
79 | iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, | |
80 | u16 tid, u16 ssn) | |
81 | { | |
82 | struct iwl_fw_dbg_trigger_tlv *trig; | |
83 | struct iwl_fw_dbg_trigger_ba *ba_trig; | |
84 | ||
85 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) | |
86 | return; | |
87 | ||
88 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); | |
89 | ba_trig = (void *)trig->data; | |
90 | ||
91 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
92 | return; | |
93 | ||
94 | if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) | |
95 | return; | |
96 | ||
97 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
98 | "BAR sent to %pM, tid %d, ssn %d", | |
99 | addr, tid, ssn); | |
100 | } | |
101 | ||
5e6a98dc SS |
102 | #define OPT_HDR(type, skb, off) \ |
103 | (type *)(skb_network_header(skb) + (off)) | |
104 | ||
105 | static void iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, | |
106 | struct ieee80211_hdr *hdr, | |
107 | struct ieee80211_tx_info *info, | |
108 | struct iwl_tx_cmd *tx_cmd) | |
109 | { | |
110 | #if IS_ENABLED(CONFIG_INET) | |
111 | u16 mh_len = ieee80211_hdrlen(hdr->frame_control); | |
112 | u16 offload_assist = le16_to_cpu(tx_cmd->offload_assist); | |
113 | u8 protocol = 0; | |
114 | ||
115 | /* | |
116 | * Do not compute checksum if already computed or if transport will | |
117 | * compute it | |
118 | */ | |
119 | if (skb->ip_summed != CHECKSUM_PARTIAL || IWL_MVM_SW_TX_CSUM_OFFLOAD) | |
120 | return; | |
121 | ||
122 | /* We do not expect to be requested to csum stuff we do not support */ | |
123 | if (WARN_ONCE(!(mvm->hw->netdev_features & IWL_TX_CSUM_NETIF_FLAGS) || | |
124 | (skb->protocol != htons(ETH_P_IP) && | |
125 | skb->protocol != htons(ETH_P_IPV6)), | |
126 | "No support for requested checksum\n")) { | |
127 | skb_checksum_help(skb); | |
128 | return; | |
129 | } | |
130 | ||
131 | if (skb->protocol == htons(ETH_P_IP)) { | |
132 | protocol = ip_hdr(skb)->protocol; | |
133 | } else { | |
134 | #if IS_ENABLED(CONFIG_IPV6) | |
135 | struct ipv6hdr *ipv6h = | |
136 | (struct ipv6hdr *)skb_network_header(skb); | |
137 | unsigned int off = sizeof(*ipv6h); | |
138 | ||
139 | protocol = ipv6h->nexthdr; | |
140 | while (protocol != NEXTHDR_NONE && ipv6_ext_hdr(protocol)) { | |
141 | /* only supported extension headers */ | |
142 | if (protocol != NEXTHDR_ROUTING && | |
143 | protocol != NEXTHDR_HOP && | |
144 | protocol != NEXTHDR_DEST && | |
145 | protocol != NEXTHDR_FRAGMENT) { | |
146 | skb_checksum_help(skb); | |
147 | return; | |
148 | } | |
149 | ||
150 | if (protocol == NEXTHDR_FRAGMENT) { | |
151 | struct frag_hdr *hp = | |
152 | OPT_HDR(struct frag_hdr, skb, off); | |
153 | ||
154 | protocol = hp->nexthdr; | |
155 | off += sizeof(struct frag_hdr); | |
156 | } else { | |
157 | struct ipv6_opt_hdr *hp = | |
158 | OPT_HDR(struct ipv6_opt_hdr, skb, off); | |
159 | ||
160 | protocol = hp->nexthdr; | |
161 | off += ipv6_optlen(hp); | |
162 | } | |
163 | } | |
164 | /* if we get here - protocol now should be TCP/UDP */ | |
165 | #endif | |
166 | } | |
167 | ||
168 | if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { | |
169 | WARN_ON_ONCE(1); | |
170 | skb_checksum_help(skb); | |
171 | return; | |
172 | } | |
173 | ||
174 | /* enable L4 csum */ | |
175 | offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); | |
176 | ||
177 | /* | |
178 | * Set offset to IP header (snap). | |
179 | * We don't support tunneling so no need to take care of inner header. | |
180 | * Size is in words. | |
181 | */ | |
182 | offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); | |
183 | ||
184 | /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ | |
185 | if (skb->protocol == htons(ETH_P_IP) && | |
186 | (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { | |
187 | ip_hdr(skb)->check = 0; | |
188 | offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); | |
189 | } | |
190 | ||
191 | /* reset UDP/TCP header csum */ | |
192 | if (protocol == IPPROTO_TCP) | |
193 | tcp_hdr(skb)->check = 0; | |
194 | else | |
195 | udp_hdr(skb)->check = 0; | |
196 | ||
197 | /* mac header len should include IV, size is in words */ | |
198 | if (info->control.hw_key) | |
199 | mh_len += info->control.hw_key->iv_len; | |
200 | mh_len /= 2; | |
201 | offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; | |
202 | ||
203 | tx_cmd->offload_assist = cpu_to_le16(offload_assist); | |
204 | #endif | |
205 | } | |
206 | ||
8ca151b5 JB |
207 | /* |
208 | * Sets most of the Tx cmd's fields | |
209 | */ | |
6ce73e65 AN |
210 | void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, |
211 | struct iwl_tx_cmd *tx_cmd, | |
212 | struct ieee80211_tx_info *info, u8 sta_id) | |
8ca151b5 | 213 | { |
5c08b0f5 | 214 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
8ca151b5 JB |
215 | struct ieee80211_hdr *hdr = (void *)skb->data; |
216 | __le16 fc = hdr->frame_control; | |
217 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
218 | u32 len = skb->len + FCS_LEN; | |
b797e3fb | 219 | u8 ac; |
8ca151b5 JB |
220 | |
221 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
222 | tx_flags |= TX_CMD_FLG_ACK; | |
223 | else | |
224 | tx_flags &= ~TX_CMD_FLG_ACK; | |
225 | ||
226 | if (ieee80211_is_probe_resp(fc)) | |
227 | tx_flags |= TX_CMD_FLG_TSF; | |
8ca151b5 | 228 | |
8ca151b5 JB |
229 | if (ieee80211_has_morefrags(fc)) |
230 | tx_flags |= TX_CMD_FLG_MORE_FRAG; | |
231 | ||
232 | if (ieee80211_is_data_qos(fc)) { | |
233 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
234 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
235 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
d8fe4844 SS |
236 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
237 | tx_cmd->offload_assist |= | |
238 | cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)); | |
9b3b43d8 ES |
239 | } else if (ieee80211_is_back_req(fc)) { |
240 | struct ieee80211_bar *bar = (void *)skb->data; | |
241 | u16 control = le16_to_cpu(bar->control); | |
4203263d | 242 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
9b3b43d8 ES |
243 | |
244 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
245 | tx_cmd->tid_tspec = (control & | |
246 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> | |
247 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
248 | WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); | |
4203263d EG |
249 | iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, |
250 | ssn); | |
8ca151b5 JB |
251 | } else { |
252 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
253 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
254 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
255 | else | |
256 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
257 | } | |
258 | ||
a9dc5060 ES |
259 | /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ |
260 | if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) | |
261 | ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; | |
262 | else | |
263 | ac = tid_to_mac80211_ac[0]; | |
264 | ||
b797e3fb EG |
265 | tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << |
266 | TX_CMD_FLG_BT_PRIO_POS; | |
267 | ||
8ca151b5 JB |
268 | if (ieee80211_is_mgmt(fc)) { |
269 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
b084a356 AA |
270 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); |
271 | else if (ieee80211_is_action(fc)) | |
272 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); | |
8ca151b5 | 273 | else |
b084a356 | 274 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 JB |
275 | |
276 | /* The spec allows Action frames in A-MPDU, we don't support | |
277 | * it | |
278 | */ | |
279 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); | |
63f7535d | 280 | } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { |
b084a356 | 281 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 | 282 | } else { |
b084a356 | 283 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); |
8ca151b5 JB |
284 | } |
285 | ||
8ca151b5 JB |
286 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
287 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
288 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
289 | ||
859d914c JB |
290 | if (fw_has_capa(&mvm->fw->ucode_capa, |
291 | IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && | |
f1daa00e AO |
292 | ieee80211_action_contains_tpc(skb)) |
293 | tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; | |
294 | ||
8ca151b5 JB |
295 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
296 | /* Total # bytes to be transmitted */ | |
a6d5e32f | 297 | tx_cmd->len = cpu_to_le16((u16)skb->len + |
5c08b0f5 | 298 | (uintptr_t)skb_info->driver_data[0]); |
8ca151b5 JB |
299 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); |
300 | tx_cmd->sta_id = sta_id; | |
d8fe4844 SS |
301 | |
302 | /* padding is inserted later in transport */ | |
303 | if (ieee80211_hdrlen(fc) % 4 && | |
304 | !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU)))) | |
305 | tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD)); | |
5e6a98dc SS |
306 | |
307 | iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd); | |
8ca151b5 JB |
308 | } |
309 | ||
310 | /* | |
311 | * Sets the fields in the Tx cmd that are rate related | |
312 | */ | |
6ce73e65 AN |
313 | void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, |
314 | struct ieee80211_tx_info *info, | |
315 | struct ieee80211_sta *sta, __le16 fc) | |
8ca151b5 JB |
316 | { |
317 | u32 rate_flags; | |
318 | int rate_idx; | |
319 | u8 rate_plcp; | |
320 | ||
321 | /* Set retry limit on RTS packets */ | |
322 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
323 | ||
324 | /* Set retry limit on DATA packets and Probe Responses*/ | |
325 | if (ieee80211_is_probe_resp(fc)) { | |
326 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
327 | tx_cmd->rts_retry_limit = | |
328 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
329 | } else if (ieee80211_is_back_req(fc)) { | |
330 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
331 | } else { | |
332 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
333 | } | |
334 | ||
335 | /* | |
e89044d7 | 336 | * for data packets, rate info comes from the table inside the fw. This |
1ffde699 | 337 | * table is controlled by LINK_QUALITY commands |
8ca151b5 JB |
338 | */ |
339 | ||
1ffde699 | 340 | if (ieee80211_is_data(fc) && sta) { |
8ca151b5 JB |
341 | tx_cmd->initial_rate_index = 0; |
342 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
343 | return; | |
344 | } else if (ieee80211_is_back_req(fc)) { | |
2edc6ec6 EG |
345 | tx_cmd->tx_flags |= |
346 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); | |
8ca151b5 JB |
347 | } |
348 | ||
349 | /* HT rate doesn't make sense for a non data frame */ | |
350 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
f85e9d19 JB |
351 | "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n", |
352 | info->control.rates[0].flags, | |
353 | info->control.rates[0].idx, | |
354 | le16_to_cpu(fc)); | |
8ca151b5 JB |
355 | |
356 | rate_idx = info->control.rates[0].idx; | |
357 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
358 | if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY) | |
359 | rate_idx = rate_lowest_index( | |
360 | &mvm->nvm_data->bands[info->band], sta); | |
361 | ||
362 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
57fbcce3 | 363 | if (info->band == NL80211_BAND_5GHZ) |
8ca151b5 JB |
364 | rate_idx += IWL_FIRST_OFDM_RATE; |
365 | ||
366 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
367 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
368 | ||
369 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
370 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
371 | ||
372 | mvm->mgmt_last_antenna_idx = | |
a0544272 | 373 | iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), |
8ca151b5 | 374 | mvm->mgmt_last_antenna_idx); |
34c8b24f | 375 | |
57fbcce3 | 376 | if (info->band == NL80211_BAND_2GHZ && |
34c8b24f | 377 | !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) |
923a8c1d | 378 | rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; |
34c8b24f EG |
379 | else |
380 | rate_flags = | |
381 | BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
8ca151b5 JB |
382 | |
383 | /* Set CCK flag as needed */ | |
384 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
385 | rate_flags |= RATE_MCS_CCK_MSK; | |
386 | ||
387 | /* Set the rate in the TX cmd */ | |
388 | tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags); | |
389 | } | |
390 | ||
391 | /* | |
392 | * Sets the fields in the Tx cmd that are crypto related | |
393 | */ | |
ca8c0f4b JB |
394 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, |
395 | struct ieee80211_tx_info *info, | |
396 | struct iwl_tx_cmd *tx_cmd, | |
397 | struct sk_buff *skb_frag, | |
398 | int hdrlen) | |
8ca151b5 JB |
399 | { |
400 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
ca8c0f4b JB |
401 | u8 *crypto_hdr = skb_frag->data + hdrlen; |
402 | u64 pn; | |
8ca151b5 JB |
403 | |
404 | switch (keyconf->cipher) { | |
405 | case WLAN_CIPHER_SUITE_CCMP: | |
ca8c0f4b JB |
406 | case WLAN_CIPHER_SUITE_CCMP_256: |
407 | iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); | |
408 | pn = atomic64_inc_return(&keyconf->tx_pn); | |
409 | crypto_hdr[0] = pn; | |
410 | crypto_hdr[2] = 0; | |
411 | crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); | |
412 | crypto_hdr[1] = pn >> 8; | |
413 | crypto_hdr[4] = pn >> 16; | |
414 | crypto_hdr[5] = pn >> 24; | |
415 | crypto_hdr[6] = pn >> 32; | |
416 | crypto_hdr[7] = pn >> 40; | |
8ca151b5 JB |
417 | break; |
418 | ||
419 | case WLAN_CIPHER_SUITE_TKIP: | |
420 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
1ad4f639 EP |
421 | pn = atomic64_inc_return(&keyconf->tx_pn); |
422 | ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); | |
8ca151b5 JB |
423 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
424 | break; | |
425 | ||
426 | case WLAN_CIPHER_SUITE_WEP104: | |
427 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
428 | /* fall through */ | |
429 | case WLAN_CIPHER_SUITE_WEP40: | |
430 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
431 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
432 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
433 | ||
434 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
435 | break; | |
436 | default: | |
e36e5433 | 437 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
8ca151b5 JB |
438 | } |
439 | } | |
440 | ||
441 | /* | |
442 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
443 | */ | |
444 | static struct iwl_device_cmd * | |
445 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
5c08b0f5 EG |
446 | struct ieee80211_tx_info *info, int hdrlen, |
447 | struct ieee80211_sta *sta, u8 sta_id) | |
8ca151b5 JB |
448 | { |
449 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
5c08b0f5 | 450 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
8ca151b5 JB |
451 | struct iwl_device_cmd *dev_cmd; |
452 | struct iwl_tx_cmd *tx_cmd; | |
453 | ||
454 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
455 | ||
456 | if (unlikely(!dev_cmd)) | |
457 | return NULL; | |
458 | ||
459 | memset(dev_cmd, 0, sizeof(*dev_cmd)); | |
3961a61a | 460 | dev_cmd->hdr.cmd = TX_CMD; |
8ca151b5 JB |
461 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
462 | ||
463 | if (info->control.hw_key) | |
ca8c0f4b | 464 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); |
8ca151b5 JB |
465 | |
466 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
467 | ||
468 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
469 | ||
5c08b0f5 EG |
470 | memset(&skb_info->status, 0, sizeof(skb_info->status)); |
471 | memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); | |
8ca151b5 | 472 | |
5c08b0f5 | 473 | skb_info->driver_data[1] = dev_cmd; |
8ca151b5 JB |
474 | |
475 | return dev_cmd; | |
476 | } | |
477 | ||
de24f638 LK |
478 | static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, |
479 | struct ieee80211_tx_info *info, __le16 fc) | |
480 | { | |
4c965139 LK |
481 | if (iwl_mvm_is_dqa_supported(mvm)) { |
482 | if (info->control.vif->type == NL80211_IFTYPE_AP && | |
483 | ieee80211_is_probe_resp(fc)) | |
484 | return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE; | |
485 | else if (ieee80211_is_mgmt(fc) && | |
486 | info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE) | |
487 | return IWL_MVM_DQA_P2P_DEVICE_QUEUE; | |
488 | } | |
de24f638 LK |
489 | |
490 | return info->hw_queue; | |
491 | } | |
492 | ||
8ca151b5 JB |
493 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) |
494 | { | |
495 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
5c08b0f5 EG |
496 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
497 | struct ieee80211_tx_info info; | |
8ca151b5 JB |
498 | struct iwl_device_cmd *dev_cmd; |
499 | struct iwl_tx_cmd *tx_cmd; | |
500 | u8 sta_id; | |
ca8c0f4b | 501 | int hdrlen = ieee80211_hdrlen(hdr->frame_control); |
de24f638 | 502 | int queue; |
8ca151b5 | 503 | |
5c08b0f5 EG |
504 | memcpy(&info, skb->cb, sizeof(info)); |
505 | ||
506 | if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) | |
8ca151b5 JB |
507 | return -1; |
508 | ||
5c08b0f5 EG |
509 | if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
510 | (!info.control.vif || | |
511 | info.hw_queue != info.control.vif->cab_queue))) | |
8ca151b5 JB |
512 | return -1; |
513 | ||
a6d5e32f | 514 | /* This holds the amsdu headers length */ |
5c08b0f5 | 515 | skb_info->driver_data[0] = (void *)(uintptr_t)0; |
a6d5e32f | 516 | |
7da91b0e AM |
517 | /* |
518 | * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used | |
519 | * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel | |
520 | * queue. STATION (HS2.0) uses the auxiliary context of the FW, | |
521 | * and hence needs to be sent on the aux queue | |
522 | */ | |
523 | if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && | |
5c08b0f5 | 524 | info.control.vif->type == NL80211_IFTYPE_STATION) |
7da91b0e AM |
525 | IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue; |
526 | ||
de24f638 LK |
527 | queue = info.hw_queue; |
528 | ||
8ca151b5 | 529 | /* |
d0ab08d0 | 530 | * If the interface on which the frame is sent is the P2P_DEVICE |
8ca151b5 | 531 | * or an AP/GO interface use the broadcast station associated |
d0ab08d0 IP |
532 | * with it; otherwise if the interface is a managed interface |
533 | * use the AP station associated with it for multicast traffic | |
534 | * (this is not possible for unicast packets as a TLDS discovery | |
535 | * response are sent without a station entry); otherwise use the | |
536 | * AUX station. | |
8ca151b5 | 537 | */ |
d0ab08d0 | 538 | sta_id = mvm->aux_sta.sta_id; |
5c08b0f5 | 539 | if (info.control.vif) { |
8ca151b5 | 540 | struct iwl_mvm_vif *mvmvif = |
5c08b0f5 | 541 | iwl_mvm_vif_from_mac80211(info.control.vif); |
d0ab08d0 | 542 | |
5c08b0f5 | 543 | if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || |
de24f638 | 544 | info.control.vif->type == NL80211_IFTYPE_AP) { |
d0ab08d0 | 545 | sta_id = mvmvif->bcast_sta.sta_id; |
de24f638 LK |
546 | queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, |
547 | hdr->frame_control); | |
548 | } else if (info.control.vif->type == NL80211_IFTYPE_STATION && | |
549 | is_multicast_ether_addr(hdr->addr1)) { | |
d0ab08d0 IP |
550 | u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); |
551 | ||
552 | if (ap_sta_id != IWL_MVM_STATION_COUNT) | |
553 | sta_id = ap_sta_id; | |
554 | } | |
8ca151b5 JB |
555 | } |
556 | ||
de24f638 | 557 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); |
8ca151b5 | 558 | |
5c08b0f5 | 559 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); |
8ca151b5 JB |
560 | if (!dev_cmd) |
561 | return -1; | |
562 | ||
8ca151b5 JB |
563 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
564 | ||
565 | /* Copy MAC header from skb into command buffer */ | |
ca8c0f4b | 566 | memcpy(tx_cmd->hdr, hdr, hdrlen); |
8ca151b5 | 567 | |
de24f638 | 568 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { |
8ca151b5 JB |
569 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); |
570 | return -1; | |
571 | } | |
572 | ||
fb896c44 LK |
573 | /* |
574 | * Increase the pending frames counter, so that later when a reply comes | |
575 | * in and the counter is decreased - we don't start getting negative | |
576 | * values. | |
577 | * Note that we don't need to make sure it isn't agg'd, since we're | |
578 | * TXing non-sta | |
579 | */ | |
580 | atomic_inc(&mvm->pending_frames[sta_id]); | |
581 | ||
8ca151b5 JB |
582 | return 0; |
583 | } | |
584 | ||
a6d5e32f EG |
585 | #ifdef CONFIG_INET |
586 | static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, | |
5c08b0f5 | 587 | struct ieee80211_tx_info *info, |
a3713f8b EG |
588 | struct ieee80211_sta *sta, |
589 | struct sk_buff_head *mpdus_skb) | |
590 | { | |
bb81bb68 | 591 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
a6d5e32f EG |
592 | struct ieee80211_hdr *hdr = (void *)skb->data; |
593 | unsigned int mss = skb_shinfo(skb)->gso_size; | |
a3713f8b | 594 | struct sk_buff *tmp, *next; |
a6d5e32f | 595 | char cb[sizeof(skb->cb)]; |
bb81bb68 | 596 | unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; |
a6d5e32f EG |
597 | bool ipv4 = (skb->protocol == htons(ETH_P_IP)); |
598 | u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; | |
599 | u16 amsdu_add, snap_ip_tcp, pad, i = 0; | |
9e7dce28 | 600 | unsigned int dbg_max_amsdu_len; |
5e6a98dc | 601 | netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; |
50b0213f | 602 | u8 *qc, tid, txf; |
a6d5e32f EG |
603 | |
604 | snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + | |
605 | tcp_hdrlen(skb); | |
606 | ||
bb81bb68 EG |
607 | qc = ieee80211_get_qos_ctl(hdr); |
608 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
609 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
610 | return -EINVAL; | |
611 | ||
a6d5e32f | 612 | if (!sta->max_amsdu_len || |
04e3a5da EG |
613 | !ieee80211_is_data_qos(hdr->frame_control) || |
614 | !mvmsta->tlc_amsdu) { | |
a6d5e32f EG |
615 | num_subframes = 1; |
616 | pad = 0; | |
617 | goto segment; | |
618 | } | |
619 | ||
5e6a98dc SS |
620 | /* |
621 | * Do not build AMSDU for IPv6 with extension headers. | |
622 | * ask stack to segment and checkum the generated MPDUs for us. | |
623 | */ | |
624 | if (skb->protocol == htons(ETH_P_IPV6) && | |
625 | ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != | |
626 | IPPROTO_TCP) { | |
627 | num_subframes = 1; | |
628 | pad = 0; | |
629 | netdev_features &= ~NETIF_F_CSUM_MASK; | |
630 | goto segment; | |
631 | } | |
632 | ||
bb81bb68 EG |
633 | /* |
634 | * No need to lock amsdu_in_ampdu_allowed since it can't be modified | |
635 | * during an BA session. | |
636 | */ | |
637 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
638 | !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { | |
a6d5e32f EG |
639 | num_subframes = 1; |
640 | pad = 0; | |
641 | goto segment; | |
642 | } | |
643 | ||
bb81bb68 | 644 | max_amsdu_len = sta->max_amsdu_len; |
9e7dce28 | 645 | dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); |
50b0213f EG |
646 | |
647 | /* the Tx FIFO to which this A-MSDU will be routed */ | |
648 | txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; | |
649 | ||
650 | /* | |
651 | * Don't send an AMSDU that will be longer than the TXF. | |
652 | * Add a security margin of 256 for the TX command + headers. | |
653 | * We also want to have the start of the next packet inside the | |
654 | * fifo to be able to send bursts. | |
655 | */ | |
656 | max_amsdu_len = min_t(unsigned int, max_amsdu_len, | |
657 | mvm->shared_mem_cfg.txfifo_size[txf] - 256); | |
658 | ||
9e7dce28 EG |
659 | if (dbg_max_amsdu_len) |
660 | max_amsdu_len = min_t(unsigned int, max_amsdu_len, | |
661 | dbg_max_amsdu_len); | |
bb81bb68 EG |
662 | |
663 | /* | |
664 | * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not | |
665 | * supported. This is a spec requirement (IEEE 802.11-2015 | |
666 | * section 8.7.3 NOTE 3). | |
667 | */ | |
668 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
669 | !sta->vht_cap.vht_supported) | |
670 | max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); | |
671 | ||
a6d5e32f EG |
672 | /* Sub frame header + SNAP + IP header + TCP header + MSS */ |
673 | subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; | |
674 | pad = (4 - subf_len) & 0x3; | |
675 | ||
676 | /* | |
677 | * If we have N subframes in the A-MSDU, then the A-MSDU's size is | |
678 | * N * subf_len + (N - 1) * pad. | |
679 | */ | |
bb81bb68 EG |
680 | num_subframes = (max_amsdu_len + pad) / (subf_len + pad); |
681 | if (num_subframes > 1) | |
a6d5e32f | 682 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; |
a6d5e32f EG |
683 | |
684 | tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - | |
685 | tcp_hdrlen(skb) + skb->data_len; | |
686 | ||
687 | /* | |
688 | * Make sure we have enough TBs for the A-MSDU: | |
689 | * 2 for each subframe | |
690 | * 1 more for each fragment | |
691 | * 1 more for the potential data in the header | |
692 | */ | |
693 | num_subframes = | |
694 | min_t(unsigned int, num_subframes, | |
695 | (mvm->trans->max_skb_frags - 1 - | |
696 | skb_shinfo(skb)->nr_frags) / 2); | |
697 | ||
698 | /* This skb fits in one single A-MSDU */ | |
699 | if (num_subframes * mss >= tcp_payload_len) { | |
5c08b0f5 EG |
700 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
701 | ||
a6d5e32f EG |
702 | /* |
703 | * Compute the length of all the data added for the A-MSDU. | |
704 | * This will be used to compute the length to write in the TX | |
705 | * command. We have: SNAP + IP + TCP for n -1 subframes and | |
706 | * ETH header for n subframes. Note that the original skb | |
707 | * already had one set of SNAP / IP / TCP headers. | |
708 | */ | |
709 | num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); | |
a6d5e32f EG |
710 | amsdu_add = num_subframes * sizeof(struct ethhdr) + |
711 | (num_subframes - 1) * (snap_ip_tcp + pad); | |
712 | /* This holds the amsdu headers length */ | |
5c08b0f5 | 713 | skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add; |
a6d5e32f EG |
714 | |
715 | __skb_queue_tail(mpdus_skb, skb); | |
716 | return 0; | |
717 | } | |
a3713f8b | 718 | |
a6d5e32f EG |
719 | /* |
720 | * Trick the segmentation function to make it | |
721 | * create SKBs that can fit into one A-MSDU. | |
722 | */ | |
723 | segment: | |
724 | skb_shinfo(skb)->gso_size = num_subframes * mss; | |
725 | memcpy(cb, skb->cb, sizeof(cb)); | |
726 | ||
5e6a98dc | 727 | next = skb_gso_segment(skb, netdev_features); |
a6d5e32f EG |
728 | skb_shinfo(skb)->gso_size = mss; |
729 | if (WARN_ON_ONCE(IS_ERR(next))) | |
a3713f8b EG |
730 | return -EINVAL; |
731 | else if (next) | |
a6d5e32f | 732 | consume_skb(skb); |
a3713f8b EG |
733 | |
734 | while (next) { | |
735 | tmp = next; | |
736 | next = tmp->next; | |
a6d5e32f | 737 | |
a3713f8b | 738 | memcpy(tmp->cb, cb, sizeof(tmp->cb)); |
a6d5e32f EG |
739 | /* |
740 | * Compute the length of all the data added for the A-MSDU. | |
741 | * This will be used to compute the length to write in the TX | |
742 | * command. We have: SNAP + IP + TCP for n -1 subframes and | |
743 | * ETH header for n subframes. | |
744 | */ | |
745 | tcp_payload_len = skb_tail_pointer(tmp) - | |
746 | skb_transport_header(tmp) - | |
747 | tcp_hdrlen(tmp) + tmp->data_len; | |
748 | ||
749 | if (ipv4) | |
750 | ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); | |
751 | ||
752 | if (tcp_payload_len > mss) { | |
5c08b0f5 EG |
753 | struct ieee80211_tx_info *skb_info = |
754 | IEEE80211_SKB_CB(tmp); | |
755 | ||
a6d5e32f | 756 | num_subframes = DIV_ROUND_UP(tcp_payload_len, mss); |
a6d5e32f EG |
757 | amsdu_add = num_subframes * sizeof(struct ethhdr) + |
758 | (num_subframes - 1) * (snap_ip_tcp + pad); | |
5c08b0f5 EG |
759 | skb_info->driver_data[0] = |
760 | (void *)(uintptr_t)amsdu_add; | |
a6d5e32f EG |
761 | skb_shinfo(tmp)->gso_size = mss; |
762 | } else { | |
bb81bb68 | 763 | qc = ieee80211_get_qos_ctl((void *)tmp->data); |
a6d5e32f EG |
764 | |
765 | if (ipv4) | |
766 | ip_send_check(ip_hdr(tmp)); | |
767 | *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
768 | skb_shinfo(tmp)->gso_size = 0; | |
769 | } | |
a3713f8b EG |
770 | |
771 | tmp->prev = NULL; | |
772 | tmp->next = NULL; | |
773 | ||
774 | __skb_queue_tail(mpdus_skb, tmp); | |
a6d5e32f | 775 | i++; |
a3713f8b EG |
776 | } |
777 | ||
778 | return 0; | |
779 | } | |
a6d5e32f EG |
780 | #else /* CONFIG_INET */ |
781 | static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, | |
5c08b0f5 | 782 | struct ieee80211_tx_info *info, |
a6d5e32f EG |
783 | struct ieee80211_sta *sta, |
784 | struct sk_buff_head *mpdus_skb) | |
785 | { | |
786 | /* Impossible to get TSO with CONFIG_INET */ | |
787 | WARN_ON(1); | |
788 | ||
789 | return -1; | |
790 | } | |
791 | #endif | |
a3713f8b | 792 | |
24afba76 LK |
793 | static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, |
794 | struct iwl_mvm_sta *mvm_sta, u8 tid, | |
795 | struct sk_buff *skb) | |
796 | { | |
797 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
798 | u8 mac_queue = info->hw_queue; | |
799 | struct sk_buff_head *deferred_tx_frames; | |
800 | ||
801 | lockdep_assert_held(&mvm_sta->lock); | |
802 | ||
803 | mvm_sta->deferred_traffic_tid_map |= BIT(tid); | |
804 | set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); | |
805 | ||
806 | deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; | |
807 | ||
808 | skb_queue_tail(deferred_tx_frames, skb); | |
809 | ||
810 | /* | |
811 | * The first deferred frame should've stopped the MAC queues, so we | |
812 | * should never get a second deferred frame for the RA/TID. | |
813 | */ | |
814 | if (!WARN(skb_queue_len(deferred_tx_frames) != 1, | |
815 | "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, | |
816 | skb_queue_len(deferred_tx_frames))) { | |
817 | iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); | |
818 | schedule_work(&mvm->add_stream_wk); | |
819 | } | |
820 | } | |
821 | ||
8ca151b5 JB |
822 | /* |
823 | * Sets the fields in the Tx cmd that are crypto related | |
824 | */ | |
a3713f8b | 825 | static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, |
5c08b0f5 | 826 | struct ieee80211_tx_info *info, |
a3713f8b | 827 | struct ieee80211_sta *sta) |
8ca151b5 JB |
828 | { |
829 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
8ca151b5 JB |
830 | struct iwl_mvm_sta *mvmsta; |
831 | struct iwl_device_cmd *dev_cmd; | |
832 | struct iwl_tx_cmd *tx_cmd; | |
833 | __le16 fc; | |
834 | u16 seq_number = 0; | |
835 | u8 tid = IWL_MAX_TID_COUNT; | |
836 | u8 txq_id = info->hw_queue; | |
7ec54716 | 837 | bool is_ampdu = false; |
ca8c0f4b | 838 | int hdrlen; |
8ca151b5 | 839 | |
5b577a90 | 840 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 841 | fc = hdr->frame_control; |
ca8c0f4b | 842 | hdrlen = ieee80211_hdrlen(fc); |
8ca151b5 JB |
843 | |
844 | if (WARN_ON_ONCE(!mvmsta)) | |
845 | return -1; | |
846 | ||
881acd89 | 847 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) |
8ca151b5 JB |
848 | return -1; |
849 | ||
5c08b0f5 EG |
850 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, |
851 | sta, mvmsta->sta_id); | |
8ca151b5 JB |
852 | if (!dev_cmd) |
853 | goto drop; | |
854 | ||
855 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; | |
856 | /* From now on, we cannot access info->control */ | |
857 | ||
3e56eadf JB |
858 | /* |
859 | * we handle that entirely ourselves -- for uAPSD the firmware | |
860 | * will always send a notification, and for PS-Poll responses | |
861 | * we'll notify mac80211 when getting frame status | |
862 | */ | |
863 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; | |
864 | ||
8ca151b5 JB |
865 | spin_lock(&mvmsta->lock); |
866 | ||
867 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { | |
868 | u8 *qc = NULL; | |
869 | qc = ieee80211_get_qos_ctl(hdr); | |
870 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
871 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
872 | goto drop_unlock_sta; | |
873 | ||
874 | seq_number = mvmsta->tid_data[tid].seq_number; | |
875 | seq_number &= IEEE80211_SCTL_SEQ; | |
876 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
877 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
8ca151b5 | 878 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; |
24afba76 LK |
879 | } else if (iwl_mvm_is_dqa_supported(mvm) && |
880 | (ieee80211_is_qos_nullfunc(fc) || | |
881 | ieee80211_is_nullfunc(fc))) { | |
882 | /* | |
883 | * nullfunc frames should go to the MGMT queue regardless of QOS | |
884 | */ | |
885 | tid = IWL_MAX_TID_COUNT; | |
886 | txq_id = mvmsta->tid_data[tid].txq_id; | |
8ca151b5 JB |
887 | } |
888 | ||
889 | /* Copy MAC header from skb into command buffer */ | |
ca8c0f4b | 890 | memcpy(tx_cmd->hdr, hdr, hdrlen); |
8ca151b5 JB |
891 | |
892 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); | |
893 | ||
a0f6bf2a AN |
894 | if (sta->tdls) { |
895 | /* default to TID 0 for non-QoS packets */ | |
896 | u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; | |
897 | ||
898 | txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; | |
899 | } | |
900 | ||
8ca151b5 JB |
901 | if (is_ampdu) { |
902 | if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
903 | goto drop_unlock_sta; | |
904 | txq_id = mvmsta->tid_data[tid].txq_id; | |
905 | } | |
906 | ||
24afba76 LK |
907 | if (iwl_mvm_is_dqa_supported(mvm)) { |
908 | if (unlikely(mvmsta->tid_data[tid].txq_id == | |
909 | IEEE80211_INVAL_HW_QUEUE)) { | |
910 | iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); | |
911 | ||
912 | /* | |
913 | * The frame is now deferred, and the worker scheduled | |
914 | * will re-allocate it, so we can free it for now. | |
915 | */ | |
916 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
917 | spin_unlock(&mvmsta->lock); | |
918 | return 0; | |
919 | } | |
920 | ||
921 | txq_id = mvmsta->tid_data[tid].txq_id; | |
922 | } | |
923 | ||
8ca151b5 | 924 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, |
cf9d1188 | 925 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
8ca151b5 | 926 | |
8ca151b5 JB |
927 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
928 | goto drop_unlock_sta; | |
929 | ||
7ec54716 | 930 | if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) |
cf9d1188 | 931 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
8ca151b5 JB |
932 | |
933 | spin_unlock(&mvmsta->lock); | |
934 | ||
19e737c9 | 935 | if (txq_id < mvm->first_agg_queue) |
e3d4bc8c | 936 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
8ca151b5 JB |
937 | |
938 | return 0; | |
939 | ||
940 | drop_unlock_sta: | |
941 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
942 | spin_unlock(&mvmsta->lock); | |
943 | drop: | |
944 | return -1; | |
945 | } | |
946 | ||
a3713f8b EG |
947 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, |
948 | struct ieee80211_sta *sta) | |
949 | { | |
950 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
5c08b0f5 EG |
951 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
952 | struct ieee80211_tx_info info; | |
a3713f8b EG |
953 | struct sk_buff_head mpdus_skbs; |
954 | unsigned int payload_len; | |
955 | int ret; | |
956 | ||
957 | if (WARN_ON_ONCE(!mvmsta)) | |
958 | return -1; | |
959 | ||
960 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT)) | |
961 | return -1; | |
962 | ||
5c08b0f5 EG |
963 | memcpy(&info, skb->cb, sizeof(info)); |
964 | ||
a6d5e32f | 965 | /* This holds the amsdu headers length */ |
5c08b0f5 | 966 | skb_info->driver_data[0] = (void *)(uintptr_t)0; |
a6d5e32f | 967 | |
a3713f8b | 968 | if (!skb_is_gso(skb)) |
5c08b0f5 | 969 | return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
a3713f8b EG |
970 | |
971 | payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - | |
972 | tcp_hdrlen(skb) + skb->data_len; | |
973 | ||
974 | if (payload_len <= skb_shinfo(skb)->gso_size) | |
5c08b0f5 | 975 | return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
a3713f8b EG |
976 | |
977 | __skb_queue_head_init(&mpdus_skbs); | |
978 | ||
5c08b0f5 | 979 | ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); |
a3713f8b EG |
980 | if (ret) |
981 | return ret; | |
982 | ||
983 | if (WARN_ON(skb_queue_empty(&mpdus_skbs))) | |
984 | return ret; | |
985 | ||
986 | while (!skb_queue_empty(&mpdus_skbs)) { | |
a6d5e32f | 987 | skb = __skb_dequeue(&mpdus_skbs); |
a3713f8b | 988 | |
5c08b0f5 | 989 | ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
a3713f8b EG |
990 | if (ret) { |
991 | __skb_queue_purge(&mpdus_skbs); | |
992 | return ret; | |
993 | } | |
994 | } | |
995 | ||
996 | return 0; | |
997 | } | |
998 | ||
8ca151b5 JB |
999 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, |
1000 | struct ieee80211_sta *sta, u8 tid) | |
1001 | { | |
5b577a90 | 1002 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1003 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
1004 | struct ieee80211_vif *vif = mvmsta->vif; | |
1005 | ||
1006 | lockdep_assert_held(&mvmsta->lock); | |
1007 | ||
3e56eadf JB |
1008 | if ((tid_data->state == IWL_AGG_ON || |
1009 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && | |
1010 | iwl_mvm_tid_queued(tid_data) == 0) { | |
1011 | /* | |
1012 | * Now that this aggregation queue is empty tell mac80211 so it | |
1013 | * knows we no longer have frames buffered for the station on | |
1014 | * this TID (for the TIM bitmap calculation.) | |
1015 | */ | |
1016 | ieee80211_sta_set_buffered(sta, tid, false); | |
1017 | } | |
1018 | ||
8ca151b5 JB |
1019 | if (tid_data->ssn != tid_data->next_reclaimed) |
1020 | return; | |
1021 | ||
1022 | switch (tid_data->state) { | |
1023 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
1024 | IWL_DEBUG_TX_QUEUES(mvm, | |
1025 | "Can continue addBA flow ssn = next_recl = %d\n", | |
1026 | tid_data->next_reclaimed); | |
1027 | tid_data->state = IWL_AGG_STARTING; | |
1028 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1029 | break; | |
1030 | ||
1031 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
1032 | IWL_DEBUG_TX_QUEUES(mvm, | |
1033 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
1034 | tid_data->next_reclaimed); | |
4ecafae9 LK |
1035 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, |
1036 | vif->hw_queue[tid_to_mac80211_ac[tid]], tid, | |
1037 | CMD_ASYNC); | |
8ca151b5 | 1038 | tid_data->state = IWL_AGG_OFF; |
8ca151b5 JB |
1039 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
1040 | break; | |
1041 | ||
1042 | default: | |
1043 | break; | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1048 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
1049 | { | |
1050 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
1051 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
1052 | ||
1053 | switch (status & TX_STATUS_MSK) { | |
1054 | case TX_STATUS_SUCCESS: | |
1055 | return "SUCCESS"; | |
1056 | TX_STATUS_POSTPONE(DELAY); | |
1057 | TX_STATUS_POSTPONE(FEW_BYTES); | |
1058 | TX_STATUS_POSTPONE(BT_PRIO); | |
1059 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
1060 | TX_STATUS_POSTPONE(CALC_TTAK); | |
1061 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
1062 | TX_STATUS_FAIL(SHORT_LIMIT); | |
1063 | TX_STATUS_FAIL(LONG_LIMIT); | |
1064 | TX_STATUS_FAIL(UNDERRUN); | |
1065 | TX_STATUS_FAIL(DRAIN_FLOW); | |
1066 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
1067 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
1068 | TX_STATUS_FAIL(DEST_PS); | |
1069 | TX_STATUS_FAIL(HOST_ABORTED); | |
1070 | TX_STATUS_FAIL(BT_RETRY); | |
1071 | TX_STATUS_FAIL(STA_INVALID); | |
1072 | TX_STATUS_FAIL(FRAG_DROPPED); | |
1073 | TX_STATUS_FAIL(TID_DISABLE); | |
1074 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
1075 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
1076 | TX_STATUS_FAIL(FW_DROP); | |
1077 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
1078 | } | |
1079 | ||
1080 | return "UNKNOWN"; | |
1081 | ||
1082 | #undef TX_STATUS_FAIL | |
1083 | #undef TX_STATUS_POSTPONE | |
1084 | } | |
1085 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
1086 | ||
d310e405 | 1087 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
57fbcce3 | 1088 | enum nl80211_band band, |
d310e405 | 1089 | struct ieee80211_tx_rate *r) |
8ca151b5 | 1090 | { |
8ca151b5 JB |
1091 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
1092 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
1093 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
1094 | case RATE_MCS_CHAN_WIDTH_20: | |
1095 | break; | |
1096 | case RATE_MCS_CHAN_WIDTH_40: | |
1097 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
1098 | break; | |
1099 | case RATE_MCS_CHAN_WIDTH_80: | |
1100 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
1101 | break; | |
1102 | case RATE_MCS_CHAN_WIDTH_160: | |
1103 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
1104 | break; | |
1105 | } | |
1106 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
1107 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
1108 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
1109 | r->flags |= IEEE80211_TX_RC_MCS; | |
1110 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
1111 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
1112 | ieee80211_rate_set_vht( | |
1113 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
1114 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
1115 | RATE_VHT_MCS_NSS_POS) + 1); | |
1116 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
1117 | } else { | |
1118 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
d310e405 | 1119 | band); |
8ca151b5 JB |
1120 | } |
1121 | } | |
1122 | ||
d310e405 ES |
1123 | /** |
1124 | * translate ucode response to mac80211 tx status control values | |
1125 | */ | |
1126 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, | |
1127 | struct ieee80211_tx_info *info) | |
1128 | { | |
1129 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
1130 | ||
1131 | info->status.antenna = | |
1132 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
1133 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); | |
1134 | } | |
1135 | ||
25657fec GBA |
1136 | static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, |
1137 | u32 status) | |
1138 | { | |
1139 | struct iwl_fw_dbg_trigger_tlv *trig; | |
1140 | struct iwl_fw_dbg_trigger_tx_status *status_trig; | |
1141 | int i; | |
1142 | ||
1143 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) | |
1144 | return; | |
1145 | ||
1146 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); | |
1147 | status_trig = (void *)trig->data; | |
1148 | ||
1149 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
1150 | return; | |
1151 | ||
1152 | for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { | |
1153 | /* don't collect on status 0 */ | |
1154 | if (!status_trig->statuses[i].status) | |
1155 | break; | |
1156 | ||
1157 | if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) | |
1158 | continue; | |
1159 | ||
1160 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
1161 | "Tx status %d was received", | |
1162 | status & TX_STATUS_MSK); | |
1163 | break; | |
1164 | } | |
1165 | } | |
1166 | ||
8ca151b5 JB |
1167 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
1168 | struct iwl_rx_packet *pkt) | |
1169 | { | |
1170 | struct ieee80211_sta *sta; | |
1171 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
1172 | int txq_id = SEQ_TO_QUEUE(sequence); | |
1173 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1174 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
1175 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
1176 | u32 status = le16_to_cpu(tx_resp->status.status); | |
1177 | u16 ssn = iwl_mvm_get_scd_ssn(tx_resp); | |
1178 | struct iwl_mvm_sta *mvmsta; | |
1179 | struct sk_buff_head skbs; | |
1180 | u8 skb_freed = 0; | |
1181 | u16 next_reclaimed, seq_ctl; | |
532beba3 | 1182 | bool is_ndp = false; |
8ca151b5 JB |
1183 | |
1184 | __skb_queue_head_init(&skbs); | |
1185 | ||
1186 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); | |
1187 | ||
1188 | /* we can free until ssn % q.n_bd not inclusive */ | |
1189 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
1190 | ||
1191 | while (!skb_queue_empty(&skbs)) { | |
1192 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
1193 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1194 | ||
1195 | skb_freed++; | |
1196 | ||
1197 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
1198 | ||
1199 | memset(&info->status, 0, sizeof(info->status)); | |
1200 | ||
1201 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
1202 | ||
1203 | /* inform mac80211 about what happened with the frame */ | |
1204 | switch (status & TX_STATUS_MSK) { | |
1205 | case TX_STATUS_SUCCESS: | |
1206 | case TX_STATUS_DIRECT_DONE: | |
1207 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1208 | break; | |
1209 | case TX_STATUS_FAIL_DEST_PS: | |
1210 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
1211 | break; | |
1212 | default: | |
1213 | break; | |
1214 | } | |
1215 | ||
25657fec GBA |
1216 | iwl_mvm_tx_status_check_trigger(mvm, status); |
1217 | ||
8ca151b5 | 1218 | info->status.rates[0].count = tx_resp->failure_frame + 1; |
d310e405 ES |
1219 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
1220 | info); | |
929e6ede ES |
1221 | info->status.status_driver_data[1] = |
1222 | (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); | |
8ca151b5 JB |
1223 | |
1224 | /* Single frame failure in an AMPDU queue => send BAR */ | |
19e737c9 | 1225 | if (txq_id >= mvm->first_agg_queue && |
9ce578a5 ES |
1226 | !(info->flags & IEEE80211_TX_STAT_ACK) && |
1227 | !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) | |
8ca151b5 | 1228 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
8ca151b5 | 1229 | |
ebea2f32 EG |
1230 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
1231 | if (status != TX_STATUS_SUCCESS) { | |
8ca151b5 JB |
1232 | struct ieee80211_hdr *hdr = (void *)skb->data; |
1233 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
1234 | } | |
1235 | ||
532beba3 EG |
1236 | if (unlikely(!seq_ctl)) { |
1237 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
1238 | ||
1239 | /* | |
1240 | * If it is an NDP, we can't update next_reclaim since | |
1241 | * its sequence control is 0. Note that for that same | |
1242 | * reason, NDPs are never sent to A-MPDU'able queues | |
1243 | * so that we can never have more than one freed frame | |
1244 | * for a single Tx resonse (see WARN_ON below). | |
1245 | */ | |
1246 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1247 | is_ndp = true; | |
1248 | } | |
1249 | ||
9b5452fd EG |
1250 | /* |
1251 | * TODO: this is not accurate if we are freeing more than one | |
1252 | * packet. | |
1253 | */ | |
1254 | info->status.tx_time = | |
1255 | le16_to_cpu(tx_resp->wireless_media_time); | |
3a84b69e EP |
1256 | BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); |
1257 | info->status.status_driver_data[0] = | |
1258 | (void *)(uintptr_t)tx_resp->reduced_tpc; | |
1259 | ||
f14d6b39 | 1260 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
1261 | } |
1262 | ||
19e737c9 | 1263 | if (txq_id >= mvm->first_agg_queue) { |
8ca151b5 JB |
1264 | /* If this is an aggregation queue, we use the ssn since: |
1265 | * ssn = wifi seq_num % 256. | |
1266 | * The seq_ctl is the sequence control of the packet to which | |
1267 | * this Tx response relates. But if there is a hole in the | |
1268 | * bitmap of the BA we received, this Tx response may allow to | |
1269 | * reclaim the hole and all the subsequent packets that were | |
1270 | * already acked. In that case, seq_ctl != ssn, and the next | |
1271 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
1272 | * case, several packets will be reclaimed even if | |
1273 | * frame_count = 1. | |
1274 | * | |
1275 | * The ssn is the index (% 256) of the latest packet that has | |
1276 | * treated (acked / dropped) + 1. | |
1277 | */ | |
1278 | next_reclaimed = ssn; | |
1279 | } else { | |
1280 | /* The next packet to be reclaimed is the one after this one */ | |
9a886586 | 1281 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
8ca151b5 JB |
1282 | } |
1283 | ||
1284 | IWL_DEBUG_TX_REPLY(mvm, | |
8c6e83d6 EG |
1285 | "TXQ %d status %s (0x%08x)\n", |
1286 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); | |
1287 | ||
1288 | IWL_DEBUG_TX_REPLY(mvm, | |
1289 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
1290 | le32_to_cpu(tx_resp->initial_rate), | |
8ca151b5 JB |
1291 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
1292 | ssn, next_reclaimed, seq_ctl); | |
1293 | ||
1294 | rcu_read_lock(); | |
1295 | ||
1296 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
9bb0c1ad EG |
1297 | /* |
1298 | * sta can't be NULL otherwise it'd mean that the sta has been freed in | |
1299 | * the firmware while we still have packets for it in the Tx queues. | |
1300 | */ | |
1301 | if (WARN_ON_ONCE(!sta)) | |
1302 | goto out; | |
8ca151b5 | 1303 | |
9bb0c1ad | 1304 | if (!IS_ERR(sta)) { |
5b577a90 | 1305 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1306 | |
1307 | if (tid != IWL_TID_NON_QOS) { | |
1308 | struct iwl_mvm_tid_data *tid_data = | |
1309 | &mvmsta->tid_data[tid]; | |
36be0eb6 | 1310 | bool send_eosp_ndp = false; |
8ca151b5 | 1311 | |
2bfb5092 | 1312 | spin_lock_bh(&mvmsta->lock); |
532beba3 EG |
1313 | if (!is_ndp) { |
1314 | tid_data->next_reclaimed = next_reclaimed; | |
1315 | IWL_DEBUG_TX_REPLY(mvm, | |
1316 | "Next reclaimed packet:%d\n", | |
1317 | next_reclaimed); | |
1318 | } else { | |
1319 | IWL_DEBUG_TX_REPLY(mvm, | |
1320 | "NDP - don't update next_reclaimed\n"); | |
1321 | } | |
1322 | ||
8ca151b5 | 1323 | iwl_mvm_check_ratid_empty(mvm, sta, tid); |
36be0eb6 EG |
1324 | |
1325 | if (mvmsta->sleep_tx_count) { | |
1326 | mvmsta->sleep_tx_count--; | |
1327 | if (mvmsta->sleep_tx_count && | |
1328 | !iwl_mvm_tid_queued(tid_data)) { | |
1329 | /* | |
1330 | * The number of frames in the queue | |
1331 | * dropped to 0 even if we sent less | |
1332 | * frames than we thought we had on the | |
1333 | * Tx queue. | |
1334 | * This means we had holes in the BA | |
1335 | * window that we just filled, ask | |
1336 | * mac80211 to send EOSP since the | |
1337 | * firmware won't know how to do that. | |
1338 | * Send NDP and the firmware will send | |
1339 | * EOSP notification that will trigger | |
1340 | * a call to ieee80211_sta_eosp(). | |
1341 | */ | |
1342 | send_eosp_ndp = true; | |
1343 | } | |
1344 | } | |
1345 | ||
2bfb5092 | 1346 | spin_unlock_bh(&mvmsta->lock); |
36be0eb6 EG |
1347 | if (send_eosp_ndp) { |
1348 | iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, | |
1349 | IEEE80211_FRAME_RELEASE_UAPSD, | |
1350 | 1, tid, false, false); | |
1351 | mvmsta->sleep_tx_count = 0; | |
1352 | ieee80211_send_eosp_nullfunc(sta, tid); | |
1353 | } | |
8ca151b5 | 1354 | } |
3e56eadf JB |
1355 | |
1356 | if (mvmsta->next_status_eosp) { | |
1357 | mvmsta->next_status_eosp = false; | |
1358 | ieee80211_sta_eosp(sta); | |
1359 | } | |
8ca151b5 | 1360 | } else { |
8ca151b5 JB |
1361 | mvmsta = NULL; |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * If the txq is not an AMPDU queue, there is no chance we freed | |
1366 | * several skbs. Check that out... | |
8ca151b5 | 1367 | */ |
9bb0c1ad EG |
1368 | if (txq_id >= mvm->first_agg_queue) |
1369 | goto out; | |
1370 | ||
1371 | /* We can't free more than one frame at once on a shared queue */ | |
1372 | WARN_ON(skb_freed > 1); | |
1373 | ||
589a6ba4 | 1374 | /* If we have still frames for this STA nothing to do here */ |
9bb0c1ad EG |
1375 | if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) |
1376 | goto out; | |
1377 | ||
1378 | if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { | |
003e5236 | 1379 | |
9bb0c1ad | 1380 | /* |
003e5236 AO |
1381 | * If there are no pending frames for this STA and |
1382 | * the tx to this station is not disabled, notify | |
1383 | * mac80211 that this station can now wake up in its | |
9bb0c1ad EG |
1384 | * STA table. |
1385 | * If mvmsta is not NULL, sta is valid. | |
1386 | */ | |
003e5236 AO |
1387 | |
1388 | spin_lock_bh(&mvmsta->lock); | |
1389 | ||
1390 | if (!mvmsta->disable_tx) | |
1391 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
1392 | ||
1393 | spin_unlock_bh(&mvmsta->lock); | |
9bb0c1ad EG |
1394 | } |
1395 | ||
1396 | if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { | |
1397 | /* | |
1398 | * We are draining and this was the last packet - pre_rcu_remove | |
1399 | * has been called already. We might be after the | |
1400 | * synchronize_net already. | |
1401 | * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. | |
1402 | */ | |
1403 | set_bit(sta_id, mvm->sta_drained); | |
1404 | schedule_work(&mvm->sta_drained_wk); | |
8ca151b5 JB |
1405 | } |
1406 | ||
9bb0c1ad | 1407 | out: |
8ca151b5 JB |
1408 | rcu_read_unlock(); |
1409 | } | |
1410 | ||
1411 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1412 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
1413 | static const char *iwl_get_agg_tx_status(u16 status) | |
1414 | { | |
1415 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
1416 | AGG_TX_STATE_(TRANSMITTED); | |
1417 | AGG_TX_STATE_(UNDERRUN); | |
1418 | AGG_TX_STATE_(BT_PRIO); | |
1419 | AGG_TX_STATE_(FEW_BYTES); | |
1420 | AGG_TX_STATE_(ABORT); | |
1421 | AGG_TX_STATE_(LAST_SENT_TTL); | |
1422 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
1423 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
1424 | AGG_TX_STATE_(SCD_QUERY); | |
1425 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
1426 | AGG_TX_STATE_(RESPONSE); | |
1427 | AGG_TX_STATE_(DUMP_TX); | |
1428 | AGG_TX_STATE_(DELAY_TX); | |
1429 | } | |
1430 | ||
1431 | return "UNKNOWN"; | |
1432 | } | |
1433 | ||
1434 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
1435 | struct iwl_rx_packet *pkt) | |
1436 | { | |
1437 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1438 | struct agg_tx_status *frame_status = &tx_resp->status; | |
1439 | int i; | |
1440 | ||
1441 | for (i = 0; i < tx_resp->frame_count; i++) { | |
1442 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
1443 | ||
1444 | IWL_DEBUG_TX_REPLY(mvm, | |
1445 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
1446 | iwl_get_agg_tx_status(fstatus), | |
1447 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
1448 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
1449 | AGG_TX_STATE_TRY_CNT_POS, | |
1450 | le16_to_cpu(frame_status[i].sequence)); | |
1451 | } | |
1452 | } | |
1453 | #else | |
1454 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
1455 | struct iwl_rx_packet *pkt) | |
1456 | {} | |
1457 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
1458 | ||
1459 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
1460 | struct iwl_rx_packet *pkt) | |
1461 | { | |
1462 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1463 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
1464 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
1465 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
1466 | struct ieee80211_sta *sta; | |
1467 | ||
19e737c9 | 1468 | if (WARN_ON_ONCE(SEQ_TO_QUEUE(sequence) < mvm->first_agg_queue)) |
8ca151b5 JB |
1469 | return; |
1470 | ||
1471 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
1472 | return; | |
1473 | ||
1474 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
1475 | ||
1476 | rcu_read_lock(); | |
1477 | ||
1478 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1479 | ||
1480 | if (!WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
5b577a90 | 1481 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1482 | mvmsta->tid_data[tid].rate_n_flags = |
1483 | le32_to_cpu(tx_resp->initial_rate); | |
9b5452fd EG |
1484 | mvmsta->tid_data[tid].tx_time = |
1485 | le16_to_cpu(tx_resp->wireless_media_time); | |
8ca151b5 JB |
1486 | } |
1487 | ||
1488 | rcu_read_unlock(); | |
1489 | } | |
1490 | ||
0416841d | 1491 | void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
1492 | { |
1493 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1494 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1495 | ||
1496 | if (tx_resp->frame_count == 1) | |
1497 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
1498 | else | |
1499 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
8ca151b5 JB |
1500 | } |
1501 | ||
a7130442 ES |
1502 | static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info, |
1503 | struct iwl_mvm_ba_notif *ba_notif, | |
1504 | struct iwl_mvm_tid_data *tid_data) | |
1505 | { | |
1506 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
1507 | info->status.ampdu_ack_len = ba_notif->txed_2_done; | |
1508 | info->status.ampdu_len = ba_notif->txed; | |
1509 | iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags, | |
1510 | info); | |
9b5452fd EG |
1511 | /* TODO: not accounted if the whole A-MPDU failed */ |
1512 | info->status.tx_time = tid_data->tx_time; | |
a7130442 | 1513 | info->status.status_driver_data[0] = |
69c7fda4 | 1514 | (void *)(uintptr_t)ba_notif->reduced_txp; |
929e6ede ES |
1515 | info->status.status_driver_data[1] = |
1516 | (void *)(uintptr_t)tid_data->rate_n_flags; | |
a7130442 ES |
1517 | } |
1518 | ||
0416841d | 1519 | void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
1520 | { |
1521 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1522 | struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data; | |
1523 | struct sk_buff_head reclaimed_skbs; | |
1524 | struct iwl_mvm_tid_data *tid_data; | |
8ca151b5 JB |
1525 | struct ieee80211_sta *sta; |
1526 | struct iwl_mvm_sta *mvmsta; | |
8ca151b5 JB |
1527 | struct sk_buff *skb; |
1528 | int sta_id, tid, freed; | |
8ca151b5 JB |
1529 | /* "flow" corresponds to Tx queue */ |
1530 | u16 scd_flow = le16_to_cpu(ba_notif->scd_flow); | |
8ca151b5 JB |
1531 | /* "ssn" is start of block-ack Tx window, corresponds to index |
1532 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
1533 | u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn); | |
1534 | ||
1535 | sta_id = ba_notif->sta_id; | |
1536 | tid = ba_notif->tid; | |
1537 | ||
2cee4762 ES |
1538 | if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || |
1539 | tid >= IWL_MAX_TID_COUNT, | |
1540 | "sta_id %d tid %d", sta_id, tid)) | |
0416841d | 1541 | return; |
2cee4762 | 1542 | |
8ca151b5 JB |
1543 | rcu_read_lock(); |
1544 | ||
1545 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1546 | ||
1547 | /* Reclaiming frames for a station that has been deleted ? */ | |
1548 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
1549 | rcu_read_unlock(); | |
0416841d | 1550 | return; |
8ca151b5 JB |
1551 | } |
1552 | ||
5b577a90 | 1553 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1554 | tid_data = &mvmsta->tid_data[tid]; |
1555 | ||
1f16ea29 JB |
1556 | if (tid_data->txq_id != scd_flow) { |
1557 | IWL_ERR(mvm, | |
1558 | "invalid BA notification: Q %d, tid %d, flow %d\n", | |
1559 | tid_data->txq_id, tid, scd_flow); | |
8ca151b5 | 1560 | rcu_read_unlock(); |
0416841d | 1561 | return; |
8ca151b5 JB |
1562 | } |
1563 | ||
2bfb5092 | 1564 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
1565 | |
1566 | __skb_queue_head_init(&reclaimed_skbs); | |
1567 | ||
1568 | /* | |
1569 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
1570 | * block-ack window (we assume that they've been successfully | |
1571 | * transmitted ... if not, it's too late anyway). | |
1572 | */ | |
1573 | iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn, | |
1574 | &reclaimed_skbs); | |
1575 | ||
1576 | IWL_DEBUG_TX_REPLY(mvm, | |
1577 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
1578 | (u8 *)&ba_notif->sta_addr_lo32, | |
1579 | ba_notif->sta_id); | |
1580 | IWL_DEBUG_TX_REPLY(mvm, | |
1581 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
1582 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
1583 | (unsigned long long)le64_to_cpu(ba_notif->bitmap), | |
1584 | scd_flow, ba_resp_scd_ssn, ba_notif->txed, | |
1585 | ba_notif->txed_2_done); | |
1586 | ||
69c7fda4 GG |
1587 | IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", |
1588 | ba_notif->reduced_txp); | |
8ca151b5 JB |
1589 | tid_data->next_reclaimed = ba_resp_scd_ssn; |
1590 | ||
1591 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
1592 | ||
1593 | freed = 0; | |
1594 | ||
1595 | skb_queue_walk(&reclaimed_skbs, skb) { | |
143582c6 JB |
1596 | struct ieee80211_hdr *hdr = (void *)skb->data; |
1597 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
8ca151b5 JB |
1598 | |
1599 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
1600 | freed++; | |
1601 | else | |
1602 | WARN_ON_ONCE(1); | |
1603 | ||
8ca151b5 JB |
1604 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
1605 | ||
143582c6 JB |
1606 | memset(&info->status, 0, sizeof(info->status)); |
1607 | /* Packet was transmitted successfully, failures come as single | |
1608 | * frames because before failing a frame the firmware transmits | |
1609 | * it without aggregation at least once. | |
1610 | */ | |
1611 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1612 | ||
a7130442 ES |
1613 | /* this is the first skb we deliver in this batch */ |
1614 | /* put the rate scaling data there */ | |
1615 | if (freed == 1) | |
1616 | iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data); | |
8ca151b5 JB |
1617 | } |
1618 | ||
2bfb5092 | 1619 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 1620 | |
a7130442 ES |
1621 | /* We got a BA notif with 0 acked or scd_ssn didn't progress which is |
1622 | * possible (i.e. first MPDU in the aggregation wasn't acked) | |
1623 | * Still it's important to update RS about sent vs. acked. | |
1624 | */ | |
1625 | if (skb_queue_empty(&reclaimed_skbs)) { | |
1626 | struct ieee80211_tx_info ba_info = {}; | |
1627 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; | |
1628 | ||
1629 | if (mvmsta->vif) | |
1630 | chanctx_conf = | |
1631 | rcu_dereference(mvmsta->vif->chanctx_conf); | |
1632 | ||
1633 | if (WARN_ON_ONCE(!chanctx_conf)) | |
1634 | goto out; | |
1635 | ||
1636 | ba_info.band = chanctx_conf->def.chan->band; | |
1637 | iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data); | |
1638 | ||
1639 | IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); | |
1640 | iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info); | |
1641 | } | |
1642 | ||
1643 | out: | |
8ca151b5 JB |
1644 | rcu_read_unlock(); |
1645 | ||
1646 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
1647 | skb = __skb_dequeue(&reclaimed_skbs); | |
f14d6b39 | 1648 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 | 1649 | } |
8ca151b5 JB |
1650 | } |
1651 | ||
fe92e32a EG |
1652 | /* |
1653 | * Note that there are transports that buffer frames before they reach | |
1654 | * the firmware. This means that after flush_tx_path is called, the | |
1655 | * queue might not be empty. The race-free way to handle this is to: | |
1656 | * 1) set the station as draining | |
1657 | * 2) flush the Tx path | |
1658 | * 3) wait for the transport queues to be empty | |
1659 | */ | |
5888a40c | 1660 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) |
8ca151b5 JB |
1661 | { |
1662 | int ret; | |
1663 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
1664 | .queues_ctl = cpu_to_le32(tfd_msk), | |
1665 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
1666 | }; | |
1667 | ||
8ca151b5 JB |
1668 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, |
1669 | sizeof(flush_cmd), &flush_cmd); | |
1670 | if (ret) | |
1671 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
1672 | return ret; | |
1673 | } |