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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 |
9a3fcf91 | 10 | * Copyright(c) 2016 - 2017 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 |
9a3fcf91 | 37 | * Copyright(c) 2016 - 2017 Intel Deutschland GmbH |
8ca151b5 JB |
38 | * All rights reserved. |
39 | * | |
40 | * Redistribution and use in source and binary forms, with or without | |
41 | * modification, are permitted provided that the following conditions | |
42 | * are met: | |
43 | * | |
44 | * * Redistributions of source code must retain the above copyright | |
45 | * notice, this list of conditions and the following disclaimer. | |
46 | * * Redistributions in binary form must reproduce the above copyright | |
47 | * notice, this list of conditions and the following disclaimer in | |
48 | * the documentation and/or other materials provided with the | |
49 | * distribution. | |
50 | * * Neither the name Intel Corporation nor the names of its | |
51 | * contributors may be used to endorse or promote products derived | |
52 | * from this software without specific prior written permission. | |
53 | * | |
54 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
55 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
56 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
57 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
58 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
59 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
60 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
61 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
62 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
63 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
64 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
65 | * | |
66 | *****************************************************************************/ | |
67 | #include <linux/ieee80211.h> | |
68 | #include <linux/etherdevice.h> | |
a3713f8b | 69 | #include <linux/tcp.h> |
a6d5e32f | 70 | #include <net/ip.h> |
5e6a98dc | 71 | #include <net/ipv6.h> |
8ca151b5 JB |
72 | |
73 | #include "iwl-trans.h" | |
74 | #include "iwl-eeprom-parse.h" | |
75 | #include "mvm.h" | |
76 | #include "sta.h" | |
2f89a5d7 | 77 | #include "fw-dbg.h" |
8ca151b5 | 78 | |
4203263d EG |
79 | static void |
80 | iwl_mvm_bar_check_trigger(struct iwl_mvm *mvm, const u8 *addr, | |
81 | u16 tid, u16 ssn) | |
82 | { | |
83 | struct iwl_fw_dbg_trigger_tlv *trig; | |
84 | struct iwl_fw_dbg_trigger_ba *ba_trig; | |
85 | ||
86 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA)) | |
87 | return; | |
88 | ||
89 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA); | |
90 | ba_trig = (void *)trig->data; | |
91 | ||
92 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
93 | return; | |
94 | ||
95 | if (!(le16_to_cpu(ba_trig->tx_bar) & BIT(tid))) | |
96 | return; | |
97 | ||
98 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
99 | "BAR sent to %pM, tid %d, ssn %d", | |
100 | addr, tid, ssn); | |
101 | } | |
102 | ||
5e6a98dc SS |
103 | #define OPT_HDR(type, skb, off) \ |
104 | (type *)(skb_network_header(skb) + (off)) | |
105 | ||
b86dd74f SS |
106 | static u16 iwl_mvm_tx_csum(struct iwl_mvm *mvm, struct sk_buff *skb, |
107 | struct ieee80211_hdr *hdr, | |
275896ab JB |
108 | struct ieee80211_tx_info *info, |
109 | u16 offload_assist) | |
5e6a98dc SS |
110 | { |
111 | #if IS_ENABLED(CONFIG_INET) | |
112 | u16 mh_len = ieee80211_hdrlen(hdr->frame_control); | |
5e6a98dc SS |
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) | |
b86dd74f | 120 | goto out; |
5e6a98dc SS |
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); | |
b86dd74f | 128 | goto out; |
5e6a98dc SS |
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)) { | |
ecf51424 SS |
141 | struct ipv6_opt_hdr *hp; |
142 | ||
5e6a98dc SS |
143 | /* only supported extension headers */ |
144 | if (protocol != NEXTHDR_ROUTING && | |
145 | protocol != NEXTHDR_HOP && | |
ecf51424 | 146 | protocol != NEXTHDR_DEST) { |
5e6a98dc | 147 | skb_checksum_help(skb); |
b86dd74f | 148 | goto out; |
5e6a98dc SS |
149 | } |
150 | ||
ecf51424 SS |
151 | hp = OPT_HDR(struct ipv6_opt_hdr, skb, off); |
152 | protocol = hp->nexthdr; | |
153 | off += ipv6_optlen(hp); | |
5e6a98dc SS |
154 | } |
155 | /* if we get here - protocol now should be TCP/UDP */ | |
156 | #endif | |
157 | } | |
158 | ||
159 | if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP) { | |
160 | WARN_ON_ONCE(1); | |
161 | skb_checksum_help(skb); | |
b86dd74f | 162 | goto out; |
5e6a98dc SS |
163 | } |
164 | ||
165 | /* enable L4 csum */ | |
166 | offload_assist |= BIT(TX_CMD_OFFLD_L4_EN); | |
167 | ||
168 | /* | |
169 | * Set offset to IP header (snap). | |
170 | * We don't support tunneling so no need to take care of inner header. | |
171 | * Size is in words. | |
172 | */ | |
173 | offload_assist |= (4 << TX_CMD_OFFLD_IP_HDR); | |
174 | ||
175 | /* Do IPv4 csum for AMSDU only (no IP csum for Ipv6) */ | |
176 | if (skb->protocol == htons(ETH_P_IP) && | |
177 | (offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) { | |
178 | ip_hdr(skb)->check = 0; | |
179 | offload_assist |= BIT(TX_CMD_OFFLD_L3_EN); | |
180 | } | |
181 | ||
182 | /* reset UDP/TCP header csum */ | |
183 | if (protocol == IPPROTO_TCP) | |
184 | tcp_hdr(skb)->check = 0; | |
185 | else | |
186 | udp_hdr(skb)->check = 0; | |
187 | ||
3f25bb4b EG |
188 | /* |
189 | * mac header len should include IV, size is in words unless | |
190 | * the IV is added by the firmware like in WEP. | |
191 | * In new Tx API, the IV is always added by the firmware. | |
192 | */ | |
193 | if (!iwl_mvm_has_new_tx_api(mvm) && info->control.hw_key && | |
194 | info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP40 && | |
195 | info->control.hw_key->cipher != WLAN_CIPHER_SUITE_WEP104) | |
5e6a98dc SS |
196 | mh_len += info->control.hw_key->iv_len; |
197 | mh_len /= 2; | |
198 | offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE; | |
199 | ||
b86dd74f | 200 | out: |
5e6a98dc | 201 | #endif |
b86dd74f | 202 | return offload_assist; |
5e6a98dc SS |
203 | } |
204 | ||
8ca151b5 JB |
205 | /* |
206 | * Sets most of the Tx cmd's fields | |
207 | */ | |
6ce73e65 AN |
208 | void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb, |
209 | struct iwl_tx_cmd *tx_cmd, | |
210 | struct ieee80211_tx_info *info, u8 sta_id) | |
8ca151b5 JB |
211 | { |
212 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
213 | __le16 fc = hdr->frame_control; | |
214 | u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags); | |
215 | u32 len = skb->len + FCS_LEN; | |
275896ab | 216 | u16 offload_assist = 0; |
b797e3fb | 217 | u8 ac; |
8ca151b5 JB |
218 | |
219 | if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) | |
220 | tx_flags |= TX_CMD_FLG_ACK; | |
221 | else | |
222 | tx_flags &= ~TX_CMD_FLG_ACK; | |
223 | ||
224 | if (ieee80211_is_probe_resp(fc)) | |
225 | tx_flags |= TX_CMD_FLG_TSF; | |
8ca151b5 | 226 | |
8ca151b5 JB |
227 | if (ieee80211_has_morefrags(fc)) |
228 | tx_flags |= TX_CMD_FLG_MORE_FRAG; | |
229 | ||
230 | if (ieee80211_is_data_qos(fc)) { | |
231 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
232 | tx_cmd->tid_tspec = qc[0] & 0xf; | |
233 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
d8fe4844 | 234 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) |
275896ab | 235 | offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); |
9b3b43d8 ES |
236 | } else if (ieee80211_is_back_req(fc)) { |
237 | struct ieee80211_bar *bar = (void *)skb->data; | |
238 | u16 control = le16_to_cpu(bar->control); | |
4203263d | 239 | u16 ssn = le16_to_cpu(bar->start_seq_num); |
9b3b43d8 ES |
240 | |
241 | tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR; | |
242 | tx_cmd->tid_tspec = (control & | |
243 | IEEE80211_BAR_CTRL_TID_INFO_MASK) >> | |
244 | IEEE80211_BAR_CTRL_TID_INFO_SHIFT; | |
245 | WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT); | |
4203263d EG |
246 | iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec, |
247 | ssn); | |
8ca151b5 JB |
248 | } else { |
249 | tx_cmd->tid_tspec = IWL_TID_NON_QOS; | |
250 | if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) | |
251 | tx_flags |= TX_CMD_FLG_SEQ_CTL; | |
252 | else | |
253 | tx_flags &= ~TX_CMD_FLG_SEQ_CTL; | |
254 | } | |
255 | ||
a9dc5060 ES |
256 | /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */ |
257 | if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT) | |
258 | ac = tid_to_mac80211_ac[tx_cmd->tid_tspec]; | |
259 | else | |
260 | ac = tid_to_mac80211_ac[0]; | |
261 | ||
b797e3fb EG |
262 | tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) << |
263 | TX_CMD_FLG_BT_PRIO_POS; | |
264 | ||
8ca151b5 JB |
265 | if (ieee80211_is_mgmt(fc)) { |
266 | if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc)) | |
b084a356 AA |
267 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC); |
268 | else if (ieee80211_is_action(fc)) | |
269 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); | |
8ca151b5 | 270 | else |
b084a356 | 271 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 JB |
272 | |
273 | /* The spec allows Action frames in A-MPDU, we don't support | |
274 | * it | |
275 | */ | |
276 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU); | |
63f7535d | 277 | } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) { |
b084a356 | 278 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT); |
8ca151b5 | 279 | } else { |
b084a356 | 280 | tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE); |
8ca151b5 JB |
281 | } |
282 | ||
8ca151b5 JB |
283 | if (ieee80211_is_data(fc) && len > mvm->rts_threshold && |
284 | !is_multicast_ether_addr(ieee80211_get_DA(hdr))) | |
285 | tx_flags |= TX_CMD_FLG_PROT_REQUIRE; | |
286 | ||
859d914c JB |
287 | if (fw_has_capa(&mvm->fw->ucode_capa, |
288 | IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) && | |
f1daa00e AO |
289 | ieee80211_action_contains_tpc(skb)) |
290 | tx_flags |= TX_CMD_FLG_WRITE_TX_POWER; | |
291 | ||
8ca151b5 | 292 | tx_cmd->tx_flags = cpu_to_le32(tx_flags); |
05e5a7e5 JB |
293 | /* Total # bytes to be transmitted - PCIe code will adjust for A-MSDU */ |
294 | tx_cmd->len = cpu_to_le16((u16)skb->len); | |
8ca151b5 JB |
295 | tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); |
296 | tx_cmd->sta_id = sta_id; | |
d8fe4844 SS |
297 | |
298 | /* padding is inserted later in transport */ | |
299 | if (ieee80211_hdrlen(fc) % 4 && | |
275896ab JB |
300 | !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) |
301 | offload_assist |= BIT(TX_CMD_OFFLD_PAD); | |
5e6a98dc | 302 | |
b86dd74f | 303 | tx_cmd->offload_assist |= |
275896ab JB |
304 | cpu_to_le16(iwl_mvm_tx_csum(mvm, skb, hdr, info, |
305 | offload_assist)); | |
8ca151b5 JB |
306 | } |
307 | ||
5ec295db SS |
308 | static u32 iwl_mvm_get_tx_rate(struct iwl_mvm *mvm, |
309 | struct ieee80211_tx_info *info, | |
310 | struct ieee80211_sta *sta) | |
311 | { | |
312 | int rate_idx; | |
313 | u8 rate_plcp; | |
314 | u32 rate_flags; | |
315 | ||
316 | /* HT rate doesn't make sense for a non data frame */ | |
317 | WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS, | |
318 | "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame\n", | |
319 | info->control.rates[0].flags, | |
320 | info->control.rates[0].idx); | |
321 | ||
322 | rate_idx = info->control.rates[0].idx; | |
323 | /* if the rate isn't a well known legacy rate, take the lowest one */ | |
324 | if (rate_idx < 0 || rate_idx >= IWL_RATE_COUNT_LEGACY) | |
325 | rate_idx = rate_lowest_index( | |
326 | &mvm->nvm_data->bands[info->band], sta); | |
327 | ||
328 | /* For 5 GHZ band, remap mac80211 rate indices into driver indices */ | |
329 | if (info->band == NL80211_BAND_5GHZ) | |
330 | rate_idx += IWL_FIRST_OFDM_RATE; | |
331 | ||
332 | /* For 2.4 GHZ band, check that there is no need to remap */ | |
333 | BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0); | |
334 | ||
335 | /* Get PLCP rate for tx_cmd->rate_n_flags */ | |
336 | rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx); | |
337 | ||
338 | if (info->band == NL80211_BAND_2GHZ && | |
339 | !iwl_mvm_bt_coex_is_shared_ant_avail(mvm)) | |
340 | rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS; | |
341 | else | |
342 | rate_flags = | |
343 | BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS; | |
344 | ||
345 | /* Set CCK flag as needed */ | |
346 | if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE)) | |
347 | rate_flags |= RATE_MCS_CCK_MSK; | |
348 | ||
349 | return (u32)rate_plcp | rate_flags; | |
350 | } | |
351 | ||
8ca151b5 JB |
352 | /* |
353 | * Sets the fields in the Tx cmd that are rate related | |
354 | */ | |
6ce73e65 AN |
355 | void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd, |
356 | struct ieee80211_tx_info *info, | |
357 | struct ieee80211_sta *sta, __le16 fc) | |
8ca151b5 | 358 | { |
8ca151b5 JB |
359 | /* Set retry limit on RTS packets */ |
360 | tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT; | |
361 | ||
362 | /* Set retry limit on DATA packets and Probe Responses*/ | |
363 | if (ieee80211_is_probe_resp(fc)) { | |
364 | tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT; | |
365 | tx_cmd->rts_retry_limit = | |
366 | min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit); | |
367 | } else if (ieee80211_is_back_req(fc)) { | |
368 | tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT; | |
369 | } else { | |
370 | tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY; | |
371 | } | |
372 | ||
373 | /* | |
e89044d7 | 374 | * for data packets, rate info comes from the table inside the fw. This |
1ffde699 | 375 | * table is controlled by LINK_QUALITY commands |
8ca151b5 JB |
376 | */ |
377 | ||
1ffde699 | 378 | if (ieee80211_is_data(fc) && sta) { |
8ca151b5 JB |
379 | tx_cmd->initial_rate_index = 0; |
380 | tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE); | |
381 | return; | |
382 | } else if (ieee80211_is_back_req(fc)) { | |
2edc6ec6 EG |
383 | tx_cmd->tx_flags |= |
384 | cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR); | |
8ca151b5 JB |
385 | } |
386 | ||
8ca151b5 | 387 | mvm->mgmt_last_antenna_idx = |
a0544272 | 388 | iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), |
8ca151b5 | 389 | mvm->mgmt_last_antenna_idx); |
34c8b24f | 390 | |
8ca151b5 | 391 | /* Set the rate in the TX cmd */ |
5ec295db | 392 | tx_cmd->rate_n_flags = cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); |
8ca151b5 JB |
393 | } |
394 | ||
2a53d166 AB |
395 | static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info, |
396 | u8 *crypto_hdr) | |
397 | { | |
398 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
399 | u64 pn; | |
400 | ||
401 | pn = atomic64_inc_return(&keyconf->tx_pn); | |
402 | crypto_hdr[0] = pn; | |
403 | crypto_hdr[2] = 0; | |
404 | crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6); | |
405 | crypto_hdr[1] = pn >> 8; | |
406 | crypto_hdr[4] = pn >> 16; | |
407 | crypto_hdr[5] = pn >> 24; | |
408 | crypto_hdr[6] = pn >> 32; | |
409 | crypto_hdr[7] = pn >> 40; | |
410 | } | |
411 | ||
8ca151b5 JB |
412 | /* |
413 | * Sets the fields in the Tx cmd that are crypto related | |
414 | */ | |
ca8c0f4b JB |
415 | static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm, |
416 | struct ieee80211_tx_info *info, | |
417 | struct iwl_tx_cmd *tx_cmd, | |
418 | struct sk_buff *skb_frag, | |
419 | int hdrlen) | |
8ca151b5 JB |
420 | { |
421 | struct ieee80211_key_conf *keyconf = info->control.hw_key; | |
ca8c0f4b JB |
422 | u8 *crypto_hdr = skb_frag->data + hdrlen; |
423 | u64 pn; | |
8ca151b5 JB |
424 | |
425 | switch (keyconf->cipher) { | |
426 | case WLAN_CIPHER_SUITE_CCMP: | |
ca8c0f4b JB |
427 | case WLAN_CIPHER_SUITE_CCMP_256: |
428 | iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd); | |
2a53d166 | 429 | iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); |
8ca151b5 JB |
430 | break; |
431 | ||
432 | case WLAN_CIPHER_SUITE_TKIP: | |
433 | tx_cmd->sec_ctl = TX_CMD_SEC_TKIP; | |
1ad4f639 EP |
434 | pn = atomic64_inc_return(&keyconf->tx_pn); |
435 | ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn); | |
8ca151b5 JB |
436 | ieee80211_get_tkip_p2k(keyconf, skb_frag, tx_cmd->key); |
437 | break; | |
438 | ||
439 | case WLAN_CIPHER_SUITE_WEP104: | |
440 | tx_cmd->sec_ctl |= TX_CMD_SEC_KEY128; | |
441 | /* fall through */ | |
442 | case WLAN_CIPHER_SUITE_WEP40: | |
443 | tx_cmd->sec_ctl |= TX_CMD_SEC_WEP | | |
444 | ((keyconf->keyidx << TX_CMD_SEC_WEP_KEY_IDX_POS) & | |
445 | TX_CMD_SEC_WEP_KEY_IDX_MSK); | |
446 | ||
447 | memcpy(&tx_cmd->key[3], keyconf->key, keyconf->keylen); | |
448 | break; | |
2a53d166 AB |
449 | case WLAN_CIPHER_SUITE_GCMP: |
450 | case WLAN_CIPHER_SUITE_GCMP_256: | |
451 | /* TODO: Taking the key from the table might introduce a race | |
452 | * when PTK rekeying is done, having an old packets with a PN | |
453 | * based on the old key but the message encrypted with a new | |
454 | * one. | |
455 | * Need to handle this. | |
456 | */ | |
4dc6511f | 457 | tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TX_CMD_SEC_KEY_FROM_TABLE; |
2a53d166 AB |
458 | tx_cmd->key[0] = keyconf->hw_key_idx; |
459 | iwl_mvm_set_tx_cmd_pn(info, crypto_hdr); | |
460 | break; | |
8ca151b5 | 461 | default: |
e36e5433 | 462 | tx_cmd->sec_ctl |= TX_CMD_SEC_EXT; |
8ca151b5 JB |
463 | } |
464 | } | |
465 | ||
466 | /* | |
467 | * Allocates and sets the Tx cmd the driver data pointers in the skb | |
468 | */ | |
469 | static struct iwl_device_cmd * | |
470 | iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb, | |
5c08b0f5 EG |
471 | struct ieee80211_tx_info *info, int hdrlen, |
472 | struct ieee80211_sta *sta, u8 sta_id) | |
8ca151b5 JB |
473 | { |
474 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
8ca151b5 JB |
475 | struct iwl_device_cmd *dev_cmd; |
476 | struct iwl_tx_cmd *tx_cmd; | |
477 | ||
478 | dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans); | |
479 | ||
480 | if (unlikely(!dev_cmd)) | |
481 | return NULL; | |
482 | ||
6f2f0194 EG |
483 | /* Make sure we zero enough of dev_cmd */ |
484 | BUILD_BUG_ON(sizeof(struct iwl_tx_cmd_gen2) > sizeof(*tx_cmd)); | |
485 | ||
486 | memset(dev_cmd, 0, sizeof(dev_cmd->hdr) + sizeof(*tx_cmd)); | |
3961a61a | 487 | dev_cmd->hdr.cmd = TX_CMD; |
c47de665 SS |
488 | |
489 | if (iwl_mvm_has_new_tx_api(mvm)) { | |
490 | struct iwl_tx_cmd_gen2 *cmd = (void *)dev_cmd->payload; | |
275896ab | 491 | u16 offload_assist = 0; |
c47de665 | 492 | |
f5bd90b7 SS |
493 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
494 | u8 *qc = ieee80211_get_qos_ctl(hdr); | |
495 | ||
496 | if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) | |
497 | offload_assist |= BIT(TX_CMD_OFFLD_AMSDU); | |
498 | } | |
499 | ||
275896ab JB |
500 | offload_assist = iwl_mvm_tx_csum(mvm, skb, hdr, info, |
501 | offload_assist); | |
502 | ||
c47de665 | 503 | /* padding is inserted later in transport */ |
c47de665 SS |
504 | if (ieee80211_hdrlen(hdr->frame_control) % 4 && |
505 | !(offload_assist & BIT(TX_CMD_OFFLD_AMSDU))) | |
506 | offload_assist |= BIT(TX_CMD_OFFLD_PAD); | |
507 | ||
508 | cmd->offload_assist |= cpu_to_le16(offload_assist); | |
509 | ||
510 | /* Total # bytes to be transmitted */ | |
511 | cmd->len = cpu_to_le16((u16)skb->len); | |
512 | ||
513 | /* Copy MAC header from skb into command buffer */ | |
514 | memcpy(cmd->hdr, hdr, hdrlen); | |
515 | ||
516 | if (!info->control.hw_key) | |
517 | cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_ENCRYPT_DIS); | |
518 | ||
519 | /* For data packets rate info comes from the fw */ | |
520 | if (ieee80211_is_data(hdr->frame_control) && sta) | |
521 | goto out; | |
522 | ||
523 | cmd->flags |= cpu_to_le32(IWL_TX_FLAGS_CMD_RATE); | |
524 | cmd->rate_n_flags = | |
525 | cpu_to_le32(iwl_mvm_get_tx_rate(mvm, info, sta)); | |
526 | ||
527 | goto out; | |
528 | } | |
529 | ||
8ca151b5 JB |
530 | tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload; |
531 | ||
532 | if (info->control.hw_key) | |
ca8c0f4b | 533 | iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen); |
8ca151b5 JB |
534 | |
535 | iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id); | |
536 | ||
537 | iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control); | |
538 | ||
c47de665 SS |
539 | /* Copy MAC header from skb into command buffer */ |
540 | memcpy(tx_cmd->hdr, hdr, hdrlen); | |
541 | ||
542 | out: | |
bd05a5bd JB |
543 | return dev_cmd; |
544 | } | |
545 | ||
546 | static void iwl_mvm_skb_prepare_status(struct sk_buff *skb, | |
547 | struct iwl_device_cmd *cmd) | |
548 | { | |
549 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); | |
550 | ||
5c08b0f5 EG |
551 | memset(&skb_info->status, 0, sizeof(skb_info->status)); |
552 | memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data)); | |
8ca151b5 | 553 | |
bd05a5bd | 554 | skb_info->driver_data[1] = cmd; |
8ca151b5 JB |
555 | } |
556 | ||
de24f638 LK |
557 | static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm, |
558 | struct ieee80211_tx_info *info, __le16 fc) | |
559 | { | |
b0129db4 JB |
560 | struct iwl_mvm_vif *mvmvif; |
561 | ||
3ee0f0e2 SS |
562 | if (!iwl_mvm_is_dqa_supported(mvm)) |
563 | return info->hw_queue; | |
564 | ||
b0129db4 JB |
565 | mvmvif = iwl_mvm_vif_from_mac80211(info->control.vif); |
566 | ||
3ee0f0e2 SS |
567 | switch (info->control.vif->type) { |
568 | case NL80211_IFTYPE_AP: | |
4d339989 | 569 | case NL80211_IFTYPE_ADHOC: |
3ee0f0e2 | 570 | /* |
e6835942 JB |
571 | * Handle legacy hostapd as well, where station will be added |
572 | * only just before sending the association response. | |
573 | * Also take care of the case where we send a deauth to a | |
574 | * station that we don't have, or similarly an association | |
575 | * response (with non-success status) for a station we can't | |
576 | * accept. | |
51da3d8b JB |
577 | * Also, disassociate frames might happen, particular with |
578 | * reason 7 ("Class 3 frame received from nonassociated STA"). | |
3ee0f0e2 | 579 | */ |
d45cb20e | 580 | if (ieee80211_is_probe_resp(fc) || ieee80211_is_auth(fc) || |
51da3d8b JB |
581 | ieee80211_is_deauth(fc) || ieee80211_is_assoc_resp(fc) || |
582 | ieee80211_is_disassoc(fc)) | |
49f71713 | 583 | return mvm->probe_queue; |
3ee0f0e2 | 584 | if (info->hw_queue == info->control.vif->cab_queue) |
b0129db4 | 585 | return mvmvif->cab_queue; |
3ee0f0e2 | 586 | |
4d339989 LK |
587 | WARN_ONCE(info->control.vif->type != NL80211_IFTYPE_ADHOC, |
588 | "fc=0x%02x", le16_to_cpu(fc)); | |
49f71713 | 589 | return mvm->probe_queue; |
3ee0f0e2 SS |
590 | case NL80211_IFTYPE_P2P_DEVICE: |
591 | if (ieee80211_is_mgmt(fc)) | |
49f71713 | 592 | return mvm->p2p_dev_queue; |
3ee0f0e2 | 593 | if (info->hw_queue == info->control.vif->cab_queue) |
b0129db4 | 594 | return mvmvif->cab_queue; |
de24f638 | 595 | |
3ee0f0e2 | 596 | WARN_ON_ONCE(1); |
49f71713 | 597 | return mvm->p2p_dev_queue; |
3ee0f0e2 SS |
598 | default: |
599 | WARN_ONCE(1, "Not a ctrl vif, no available queue\n"); | |
600 | return -1; | |
601 | } | |
de24f638 LK |
602 | } |
603 | ||
8ca151b5 JB |
604 | int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) |
605 | { | |
606 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
5c08b0f5 EG |
607 | struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb); |
608 | struct ieee80211_tx_info info; | |
8ca151b5 | 609 | struct iwl_device_cmd *dev_cmd; |
8ca151b5 | 610 | u8 sta_id; |
ca8c0f4b | 611 | int hdrlen = ieee80211_hdrlen(hdr->frame_control); |
de24f638 | 612 | int queue; |
8ca151b5 | 613 | |
54c5ef2e BL |
614 | /* IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used |
615 | * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel | |
616 | * queue. STATION (HS2.0) uses the auxiliary context of the FW, | |
617 | * and hence needs to be sent on the aux queue | |
618 | */ | |
45b957e3 | 619 | if (skb_info->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE && |
54c5ef2e | 620 | skb_info->control.vif->type == NL80211_IFTYPE_STATION) |
45b957e3 | 621 | skb_info->hw_queue = mvm->aux_queue; |
54c5ef2e | 622 | |
5c08b0f5 EG |
623 | memcpy(&info, skb->cb, sizeof(info)); |
624 | ||
625 | if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU)) | |
8ca151b5 JB |
626 | return -1; |
627 | ||
5c08b0f5 EG |
628 | if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM && |
629 | (!info.control.vif || | |
630 | info.hw_queue != info.control.vif->cab_queue))) | |
8ca151b5 JB |
631 | return -1; |
632 | ||
de24f638 LK |
633 | queue = info.hw_queue; |
634 | ||
8ca151b5 | 635 | /* |
d0ab08d0 | 636 | * If the interface on which the frame is sent is the P2P_DEVICE |
8ca151b5 | 637 | * or an AP/GO interface use the broadcast station associated |
d0ab08d0 IP |
638 | * with it; otherwise if the interface is a managed interface |
639 | * use the AP station associated with it for multicast traffic | |
640 | * (this is not possible for unicast packets as a TLDS discovery | |
641 | * response are sent without a station entry); otherwise use the | |
642 | * AUX station. | |
8ca151b5 | 643 | */ |
d0ab08d0 | 644 | sta_id = mvm->aux_sta.sta_id; |
5c08b0f5 | 645 | if (info.control.vif) { |
8ca151b5 | 646 | struct iwl_mvm_vif *mvmvif = |
5c08b0f5 | 647 | iwl_mvm_vif_from_mac80211(info.control.vif); |
d0ab08d0 | 648 | |
5c08b0f5 | 649 | if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE || |
4d339989 LK |
650 | info.control.vif->type == NL80211_IFTYPE_AP || |
651 | info.control.vif->type == NL80211_IFTYPE_ADHOC) { | |
d0ab08d0 | 652 | sta_id = mvmvif->bcast_sta.sta_id; |
de24f638 LK |
653 | queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info, |
654 | hdr->frame_control); | |
3ee0f0e2 SS |
655 | if (queue < 0) |
656 | return -1; | |
de24f638 LK |
657 | } else if (info.control.vif->type == NL80211_IFTYPE_STATION && |
658 | is_multicast_ether_addr(hdr->addr1)) { | |
d0ab08d0 IP |
659 | u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id); |
660 | ||
0ae98812 | 661 | if (ap_sta_id != IWL_MVM_INVALID_STA) |
d0ab08d0 | 662 | sta_id = ap_sta_id; |
6d759b02 LK |
663 | } else if (iwl_mvm_is_dqa_supported(mvm) && |
664 | info.control.vif->type == NL80211_IFTYPE_MONITOR) { | |
665 | queue = mvm->aux_queue; | |
d0ab08d0 | 666 | } |
8ca151b5 JB |
667 | } |
668 | ||
de24f638 | 669 | IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue); |
8ca151b5 | 670 | |
5c08b0f5 | 671 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id); |
8ca151b5 JB |
672 | if (!dev_cmd) |
673 | return -1; | |
674 | ||
bd05a5bd JB |
675 | /* From now on, we cannot access info->control */ |
676 | iwl_mvm_skb_prepare_status(skb, dev_cmd); | |
677 | ||
de24f638 | 678 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) { |
8ca151b5 JB |
679 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); |
680 | return -1; | |
681 | } | |
682 | ||
fb896c44 LK |
683 | /* |
684 | * Increase the pending frames counter, so that later when a reply comes | |
685 | * in and the counter is decreased - we don't start getting negative | |
686 | * values. | |
687 | * Note that we don't need to make sure it isn't agg'd, since we're | |
688 | * TXing non-sta | |
9a3fcf91 | 689 | * For DQA mode - we shouldn't increase it though |
fb896c44 | 690 | */ |
9a3fcf91 SS |
691 | if (!iwl_mvm_is_dqa_supported(mvm)) |
692 | atomic_inc(&mvm->pending_frames[sta_id]); | |
fb896c44 | 693 | |
8ca151b5 JB |
694 | return 0; |
695 | } | |
696 | ||
a6d5e32f EG |
697 | #ifdef CONFIG_INET |
698 | static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, | |
5c08b0f5 | 699 | struct ieee80211_tx_info *info, |
a3713f8b EG |
700 | struct ieee80211_sta *sta, |
701 | struct sk_buff_head *mpdus_skb) | |
702 | { | |
bb81bb68 | 703 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
a6d5e32f EG |
704 | struct ieee80211_hdr *hdr = (void *)skb->data; |
705 | unsigned int mss = skb_shinfo(skb)->gso_size; | |
a3713f8b | 706 | struct sk_buff *tmp, *next; |
a6d5e32f | 707 | char cb[sizeof(skb->cb)]; |
bb81bb68 | 708 | unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len; |
a6d5e32f EG |
709 | bool ipv4 = (skb->protocol == htons(ETH_P_IP)); |
710 | u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0; | |
05e5a7e5 | 711 | u16 snap_ip_tcp, pad, i = 0; |
9e7dce28 | 712 | unsigned int dbg_max_amsdu_len; |
5e6a98dc | 713 | netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG; |
50b0213f | 714 | u8 *qc, tid, txf; |
a6d5e32f EG |
715 | |
716 | snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) + | |
717 | tcp_hdrlen(skb); | |
718 | ||
fa820d69 EG |
719 | dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len); |
720 | ||
a6d5e32f | 721 | if (!sta->max_amsdu_len || |
04e3a5da | 722 | !ieee80211_is_data_qos(hdr->frame_control) || |
fa820d69 | 723 | (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) { |
a6d5e32f EG |
724 | num_subframes = 1; |
725 | pad = 0; | |
726 | goto segment; | |
727 | } | |
728 | ||
4f555e60 EG |
729 | qc = ieee80211_get_qos_ctl(hdr); |
730 | tid = *qc & IEEE80211_QOS_CTL_TID_MASK; | |
731 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
732 | return -EINVAL; | |
733 | ||
5e6a98dc SS |
734 | /* |
735 | * Do not build AMSDU for IPv6 with extension headers. | |
736 | * ask stack to segment and checkum the generated MPDUs for us. | |
737 | */ | |
738 | if (skb->protocol == htons(ETH_P_IPV6) && | |
739 | ((struct ipv6hdr *)skb_network_header(skb))->nexthdr != | |
740 | IPPROTO_TCP) { | |
741 | num_subframes = 1; | |
742 | pad = 0; | |
743 | netdev_features &= ~NETIF_F_CSUM_MASK; | |
744 | goto segment; | |
745 | } | |
746 | ||
bb81bb68 EG |
747 | /* |
748 | * No need to lock amsdu_in_ampdu_allowed since it can't be modified | |
749 | * during an BA session. | |
750 | */ | |
751 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
752 | !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) { | |
a6d5e32f EG |
753 | num_subframes = 1; |
754 | pad = 0; | |
755 | goto segment; | |
756 | } | |
757 | ||
bb81bb68 | 758 | max_amsdu_len = sta->max_amsdu_len; |
50b0213f EG |
759 | |
760 | /* the Tx FIFO to which this A-MSDU will be routed */ | |
761 | txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]]; | |
762 | ||
763 | /* | |
764 | * Don't send an AMSDU that will be longer than the TXF. | |
765 | * Add a security margin of 256 for the TX command + headers. | |
766 | * We also want to have the start of the next packet inside the | |
767 | * fifo to be able to send bursts. | |
768 | */ | |
769 | max_amsdu_len = min_t(unsigned int, max_amsdu_len, | |
fa1f2b61 | 770 | mvm->smem_cfg.lmac[0].txfifo_size[txf] - 256); |
50b0213f | 771 | |
fa820d69 | 772 | if (unlikely(dbg_max_amsdu_len)) |
9e7dce28 EG |
773 | max_amsdu_len = min_t(unsigned int, max_amsdu_len, |
774 | dbg_max_amsdu_len); | |
bb81bb68 EG |
775 | |
776 | /* | |
777 | * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not | |
778 | * supported. This is a spec requirement (IEEE 802.11-2015 | |
779 | * section 8.7.3 NOTE 3). | |
780 | */ | |
781 | if (info->flags & IEEE80211_TX_CTL_AMPDU && | |
782 | !sta->vht_cap.vht_supported) | |
783 | max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095); | |
784 | ||
a6d5e32f EG |
785 | /* Sub frame header + SNAP + IP header + TCP header + MSS */ |
786 | subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss; | |
787 | pad = (4 - subf_len) & 0x3; | |
788 | ||
789 | /* | |
790 | * If we have N subframes in the A-MSDU, then the A-MSDU's size is | |
791 | * N * subf_len + (N - 1) * pad. | |
792 | */ | |
bb81bb68 EG |
793 | num_subframes = (max_amsdu_len + pad) / (subf_len + pad); |
794 | if (num_subframes > 1) | |
a6d5e32f | 795 | *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT; |
a6d5e32f EG |
796 | |
797 | tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - | |
798 | tcp_hdrlen(skb) + skb->data_len; | |
799 | ||
800 | /* | |
801 | * Make sure we have enough TBs for the A-MSDU: | |
802 | * 2 for each subframe | |
803 | * 1 more for each fragment | |
804 | * 1 more for the potential data in the header | |
805 | */ | |
806 | num_subframes = | |
807 | min_t(unsigned int, num_subframes, | |
808 | (mvm->trans->max_skb_frags - 1 - | |
809 | skb_shinfo(skb)->nr_frags) / 2); | |
810 | ||
811 | /* This skb fits in one single A-MSDU */ | |
812 | if (num_subframes * mss >= tcp_payload_len) { | |
a6d5e32f EG |
813 | __skb_queue_tail(mpdus_skb, skb); |
814 | return 0; | |
815 | } | |
a3713f8b | 816 | |
a6d5e32f EG |
817 | /* |
818 | * Trick the segmentation function to make it | |
819 | * create SKBs that can fit into one A-MSDU. | |
820 | */ | |
821 | segment: | |
822 | skb_shinfo(skb)->gso_size = num_subframes * mss; | |
823 | memcpy(cb, skb->cb, sizeof(cb)); | |
824 | ||
5e6a98dc | 825 | next = skb_gso_segment(skb, netdev_features); |
a6d5e32f EG |
826 | skb_shinfo(skb)->gso_size = mss; |
827 | if (WARN_ON_ONCE(IS_ERR(next))) | |
a3713f8b EG |
828 | return -EINVAL; |
829 | else if (next) | |
a6d5e32f | 830 | consume_skb(skb); |
a3713f8b EG |
831 | |
832 | while (next) { | |
833 | tmp = next; | |
834 | next = tmp->next; | |
a6d5e32f | 835 | |
a3713f8b | 836 | memcpy(tmp->cb, cb, sizeof(tmp->cb)); |
a6d5e32f EG |
837 | /* |
838 | * Compute the length of all the data added for the A-MSDU. | |
839 | * This will be used to compute the length to write in the TX | |
840 | * command. We have: SNAP + IP + TCP for n -1 subframes and | |
841 | * ETH header for n subframes. | |
842 | */ | |
843 | tcp_payload_len = skb_tail_pointer(tmp) - | |
844 | skb_transport_header(tmp) - | |
845 | tcp_hdrlen(tmp) + tmp->data_len; | |
846 | ||
847 | if (ipv4) | |
848 | ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes); | |
849 | ||
850 | if (tcp_payload_len > mss) { | |
a6d5e32f EG |
851 | skb_shinfo(tmp)->gso_size = mss; |
852 | } else { | |
6344436e EG |
853 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
854 | qc = ieee80211_get_qos_ctl((void *)tmp->data); | |
a6d5e32f | 855 | |
6344436e EG |
856 | if (ipv4) |
857 | ip_send_check(ip_hdr(tmp)); | |
858 | *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT; | |
859 | } | |
a6d5e32f EG |
860 | skb_shinfo(tmp)->gso_size = 0; |
861 | } | |
a3713f8b EG |
862 | |
863 | tmp->prev = NULL; | |
864 | tmp->next = NULL; | |
865 | ||
866 | __skb_queue_tail(mpdus_skb, tmp); | |
a6d5e32f | 867 | i++; |
a3713f8b EG |
868 | } |
869 | ||
870 | return 0; | |
871 | } | |
a6d5e32f EG |
872 | #else /* CONFIG_INET */ |
873 | static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb, | |
5c08b0f5 | 874 | struct ieee80211_tx_info *info, |
a6d5e32f EG |
875 | struct ieee80211_sta *sta, |
876 | struct sk_buff_head *mpdus_skb) | |
877 | { | |
878 | /* Impossible to get TSO with CONFIG_INET */ | |
879 | WARN_ON(1); | |
880 | ||
881 | return -1; | |
882 | } | |
883 | #endif | |
a3713f8b | 884 | |
24afba76 LK |
885 | static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm, |
886 | struct iwl_mvm_sta *mvm_sta, u8 tid, | |
887 | struct sk_buff *skb) | |
888 | { | |
889 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
890 | u8 mac_queue = info->hw_queue; | |
891 | struct sk_buff_head *deferred_tx_frames; | |
892 | ||
893 | lockdep_assert_held(&mvm_sta->lock); | |
894 | ||
895 | mvm_sta->deferred_traffic_tid_map |= BIT(tid); | |
896 | set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames); | |
897 | ||
898 | deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames; | |
899 | ||
900 | skb_queue_tail(deferred_tx_frames, skb); | |
901 | ||
902 | /* | |
903 | * The first deferred frame should've stopped the MAC queues, so we | |
904 | * should never get a second deferred frame for the RA/TID. | |
905 | */ | |
906 | if (!WARN(skb_queue_len(deferred_tx_frames) != 1, | |
907 | "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid, | |
908 | skb_queue_len(deferred_tx_frames))) { | |
909 | iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue)); | |
910 | schedule_work(&mvm->add_stream_wk); | |
911 | } | |
912 | } | |
913 | ||
9f9af3d7 LK |
914 | /* Check if there are any timed-out TIDs on a given shared TXQ */ |
915 | static bool iwl_mvm_txq_should_update(struct iwl_mvm *mvm, int txq_id) | |
916 | { | |
917 | unsigned long queue_tid_bitmap = mvm->queue_info[txq_id].tid_bitmap; | |
918 | unsigned long now = jiffies; | |
919 | int tid; | |
920 | ||
bb49701b SS |
921 | if (WARN_ON(iwl_mvm_has_new_tx_api(mvm))) |
922 | return false; | |
923 | ||
9f9af3d7 LK |
924 | for_each_set_bit(tid, &queue_tid_bitmap, IWL_MAX_TID_COUNT + 1) { |
925 | if (time_before(mvm->queue_info[txq_id].last_frame_time[tid] + | |
926 | IWL_MVM_DQA_QUEUE_TIMEOUT, now)) | |
927 | return true; | |
928 | } | |
929 | ||
930 | return false; | |
931 | } | |
932 | ||
8ca151b5 JB |
933 | /* |
934 | * Sets the fields in the Tx cmd that are crypto related | |
935 | */ | |
a3713f8b | 936 | static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, |
5c08b0f5 | 937 | struct ieee80211_tx_info *info, |
a3713f8b | 938 | struct ieee80211_sta *sta) |
8ca151b5 JB |
939 | { |
940 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; | |
8ca151b5 JB |
941 | struct iwl_mvm_sta *mvmsta; |
942 | struct iwl_device_cmd *dev_cmd; | |
8ca151b5 JB |
943 | __le16 fc; |
944 | u16 seq_number = 0; | |
945 | u8 tid = IWL_MAX_TID_COUNT; | |
6862fcee | 946 | u16 txq_id = info->hw_queue; |
7ec54716 | 947 | bool is_ampdu = false; |
ca8c0f4b | 948 | int hdrlen; |
8ca151b5 | 949 | |
5b577a90 | 950 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 951 | fc = hdr->frame_control; |
ca8c0f4b | 952 | hdrlen = ieee80211_hdrlen(fc); |
8ca151b5 JB |
953 | |
954 | if (WARN_ON_ONCE(!mvmsta)) | |
955 | return -1; | |
956 | ||
0ae98812 | 957 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) |
8ca151b5 JB |
958 | return -1; |
959 | ||
5c08b0f5 EG |
960 | dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen, |
961 | sta, mvmsta->sta_id); | |
8ca151b5 JB |
962 | if (!dev_cmd) |
963 | goto drop; | |
964 | ||
3e56eadf JB |
965 | /* |
966 | * we handle that entirely ourselves -- for uAPSD the firmware | |
967 | * will always send a notification, and for PS-Poll responses | |
968 | * we'll notify mac80211 when getting frame status | |
969 | */ | |
970 | info->flags &= ~IEEE80211_TX_STATUS_EOSP; | |
971 | ||
8ca151b5 JB |
972 | spin_lock(&mvmsta->lock); |
973 | ||
0d7f1b99 SS |
974 | /* nullfunc frames should go to the MGMT queue regardless of QOS, |
975 | * the condition of !ieee80211_is_qos_nullfunc(fc) keeps the default | |
976 | * assignment of MGMT TID | |
977 | */ | |
8ca151b5 JB |
978 | if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) { |
979 | u8 *qc = NULL; | |
980 | qc = ieee80211_get_qos_ctl(hdr); | |
981 | tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; | |
982 | if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT)) | |
983 | goto drop_unlock_sta; | |
984 | ||
8ca151b5 | 985 | is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU; |
0d7f1b99 SS |
986 | if (WARN_ON_ONCE(is_ampdu && |
987 | mvmsta->tid_data[tid].state != IWL_AGG_ON)) | |
988 | goto drop_unlock_sta; | |
c47de665 SS |
989 | |
990 | seq_number = mvmsta->tid_data[tid].seq_number; | |
991 | seq_number &= IEEE80211_SCTL_SEQ; | |
992 | ||
993 | if (!iwl_mvm_has_new_tx_api(mvm)) { | |
994 | struct iwl_tx_cmd *tx_cmd = (void *)dev_cmd->payload; | |
995 | ||
996 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
997 | hdr->seq_ctrl |= cpu_to_le16(seq_number); | |
998 | /* update the tx_cmd hdr as it was already copied */ | |
999 | tx_cmd->hdr->seq_ctrl = hdr->seq_ctrl; | |
1000 | } | |
8ca151b5 JB |
1001 | } |
1002 | ||
0d7f1b99 | 1003 | if (iwl_mvm_is_dqa_supported(mvm) || is_ampdu) |
9794c64f | 1004 | txq_id = mvmsta->tid_data[tid].txq_id; |
c47de665 | 1005 | |
e3118ad7 | 1006 | if (sta->tdls && !iwl_mvm_is_dqa_supported(mvm)) { |
a0f6bf2a AN |
1007 | /* default to TID 0 for non-QoS packets */ |
1008 | u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid; | |
1009 | ||
1010 | txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]]; | |
1011 | } | |
1012 | ||
0d7f1b99 | 1013 | WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM); |
8ca151b5 | 1014 | |
9794c64f | 1015 | /* Check if TXQ needs to be allocated or re-activated */ |
6862fcee | 1016 | if (unlikely(txq_id == IWL_MVM_INVALID_QUEUE || |
9794c64f LK |
1017 | !mvmsta->tid_data[tid].is_tid_active) && |
1018 | iwl_mvm_is_dqa_supported(mvm)) { | |
1019 | /* If TXQ needs to be allocated... */ | |
6862fcee | 1020 | if (txq_id == IWL_MVM_INVALID_QUEUE) { |
24afba76 LK |
1021 | iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb); |
1022 | ||
1023 | /* | |
1024 | * The frame is now deferred, and the worker scheduled | |
1025 | * will re-allocate it, so we can free it for now. | |
1026 | */ | |
1027 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
1028 | spin_unlock(&mvmsta->lock); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
34e10860 SS |
1032 | /* queue should always be active in new TX path */ |
1033 | WARN_ON(iwl_mvm_has_new_tx_api(mvm)); | |
1034 | ||
9794c64f LK |
1035 | /* If we are here - TXQ exists and needs to be re-activated */ |
1036 | spin_lock(&mvm->queue_info_lock); | |
1037 | mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY; | |
1038 | mvmsta->tid_data[tid].is_tid_active = true; | |
1039 | spin_unlock(&mvm->queue_info_lock); | |
1040 | ||
1041 | IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n", | |
1042 | txq_id); | |
24afba76 LK |
1043 | } |
1044 | ||
34e10860 | 1045 | if (iwl_mvm_is_dqa_supported(mvm) && !iwl_mvm_has_new_tx_api(mvm)) { |
9f9af3d7 LK |
1046 | /* Keep track of the time of the last frame for this RA/TID */ |
1047 | mvm->queue_info[txq_id].last_frame_time[tid] = jiffies; | |
1048 | ||
1049 | /* | |
1050 | * If we have timed-out TIDs - schedule the worker that will | |
1051 | * reconfig the queues and update them | |
1052 | * | |
1053 | * Note that the mvm->queue_info_lock isn't being taken here in | |
1054 | * order to not serialize the TX flow. This isn't dangerous | |
1055 | * because scheduling mvm->add_stream_wk can't ruin the state, | |
1056 | * and if we DON'T schedule it due to some race condition then | |
1057 | * next TX we get here we will. | |
1058 | */ | |
1059 | if (unlikely(mvm->queue_info[txq_id].status == | |
1060 | IWL_MVM_QUEUE_SHARED && | |
1061 | iwl_mvm_txq_should_update(mvm, txq_id))) | |
1062 | schedule_work(&mvm->add_stream_wk); | |
1063 | } | |
9794c64f | 1064 | |
8ca151b5 | 1065 | IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id, |
cf9d1188 | 1066 | tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number)); |
8ca151b5 | 1067 | |
bd05a5bd JB |
1068 | /* From now on, we cannot access info->control */ |
1069 | iwl_mvm_skb_prepare_status(skb, dev_cmd); | |
1070 | ||
8ca151b5 JB |
1071 | if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id)) |
1072 | goto drop_unlock_sta; | |
1073 | ||
7ec54716 | 1074 | if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc)) |
cf9d1188 | 1075 | mvmsta->tid_data[tid].seq_number = seq_number + 0x10; |
8ca151b5 JB |
1076 | |
1077 | spin_unlock(&mvmsta->lock); | |
1078 | ||
9a3fcf91 SS |
1079 | /* Increase pending frames count if this isn't AMPDU or DQA queue */ |
1080 | if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu) | |
e3d4bc8c | 1081 | atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); |
8ca151b5 JB |
1082 | |
1083 | return 0; | |
1084 | ||
1085 | drop_unlock_sta: | |
1086 | iwl_trans_free_tx_cmd(mvm->trans, dev_cmd); | |
1087 | spin_unlock(&mvmsta->lock); | |
1088 | drop: | |
1089 | return -1; | |
1090 | } | |
1091 | ||
a3713f8b EG |
1092 | int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb, |
1093 | struct ieee80211_sta *sta) | |
1094 | { | |
1095 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); | |
5c08b0f5 | 1096 | struct ieee80211_tx_info info; |
a3713f8b EG |
1097 | struct sk_buff_head mpdus_skbs; |
1098 | unsigned int payload_len; | |
1099 | int ret; | |
1100 | ||
1101 | if (WARN_ON_ONCE(!mvmsta)) | |
1102 | return -1; | |
1103 | ||
0ae98812 | 1104 | if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_INVALID_STA)) |
a3713f8b EG |
1105 | return -1; |
1106 | ||
5c08b0f5 EG |
1107 | memcpy(&info, skb->cb, sizeof(info)); |
1108 | ||
a3713f8b | 1109 | if (!skb_is_gso(skb)) |
5c08b0f5 | 1110 | return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
a3713f8b EG |
1111 | |
1112 | payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) - | |
1113 | tcp_hdrlen(skb) + skb->data_len; | |
1114 | ||
1115 | if (payload_len <= skb_shinfo(skb)->gso_size) | |
5c08b0f5 | 1116 | return iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
a3713f8b EG |
1117 | |
1118 | __skb_queue_head_init(&mpdus_skbs); | |
1119 | ||
5c08b0f5 | 1120 | ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs); |
a3713f8b EG |
1121 | if (ret) |
1122 | return ret; | |
1123 | ||
1124 | if (WARN_ON(skb_queue_empty(&mpdus_skbs))) | |
1125 | return ret; | |
1126 | ||
1127 | while (!skb_queue_empty(&mpdus_skbs)) { | |
a6d5e32f | 1128 | skb = __skb_dequeue(&mpdus_skbs); |
a3713f8b | 1129 | |
5c08b0f5 | 1130 | ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta); |
a3713f8b EG |
1131 | if (ret) { |
1132 | __skb_queue_purge(&mpdus_skbs); | |
1133 | return ret; | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | return 0; | |
1138 | } | |
1139 | ||
8ca151b5 JB |
1140 | static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, |
1141 | struct ieee80211_sta *sta, u8 tid) | |
1142 | { | |
5b577a90 | 1143 | struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1144 | struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; |
1145 | struct ieee80211_vif *vif = mvmsta->vif; | |
dd32162d | 1146 | u16 normalized_ssn; |
8ca151b5 JB |
1147 | |
1148 | lockdep_assert_held(&mvmsta->lock); | |
1149 | ||
3e56eadf | 1150 | if ((tid_data->state == IWL_AGG_ON || |
9a3fcf91 SS |
1151 | tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA || |
1152 | iwl_mvm_is_dqa_supported(mvm)) && | |
dd32162d | 1153 | iwl_mvm_tid_queued(mvm, tid_data) == 0) { |
3e56eadf | 1154 | /* |
9a3fcf91 SS |
1155 | * Now that this aggregation or DQA queue is empty tell |
1156 | * mac80211 so it knows we no longer have frames buffered for | |
1157 | * the station on this TID (for the TIM bitmap calculation.) | |
3e56eadf JB |
1158 | */ |
1159 | ieee80211_sta_set_buffered(sta, tid, false); | |
1160 | } | |
1161 | ||
dd32162d LK |
1162 | /* |
1163 | * In A000 HW, the next_reclaimed index is only 8 bit, so we'll need | |
1164 | * to align the wrap around of ssn so we compare relevant values. | |
1165 | */ | |
1166 | normalized_ssn = tid_data->ssn; | |
1167 | if (mvm->trans->cfg->gen2) | |
1168 | normalized_ssn &= 0xff; | |
1169 | ||
1170 | if (normalized_ssn != tid_data->next_reclaimed) | |
8ca151b5 JB |
1171 | return; |
1172 | ||
1173 | switch (tid_data->state) { | |
1174 | case IWL_EMPTYING_HW_QUEUE_ADDBA: | |
1175 | IWL_DEBUG_TX_QUEUES(mvm, | |
1176 | "Can continue addBA flow ssn = next_recl = %d\n", | |
1177 | tid_data->next_reclaimed); | |
1178 | tid_data->state = IWL_AGG_STARTING; | |
1179 | ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); | |
1180 | break; | |
1181 | ||
1182 | case IWL_EMPTYING_HW_QUEUE_DELBA: | |
1183 | IWL_DEBUG_TX_QUEUES(mvm, | |
1184 | "Can continue DELBA flow ssn = next_recl = %d\n", | |
1185 | tid_data->next_reclaimed); | |
15985fba LK |
1186 | if (!iwl_mvm_is_dqa_supported(mvm)) { |
1187 | u8 mac80211_ac = tid_to_mac80211_ac[tid]; | |
1188 | ||
1189 | iwl_mvm_disable_txq(mvm, tid_data->txq_id, | |
1190 | vif->hw_queue[mac80211_ac], tid, | |
1191 | CMD_ASYNC); | |
1192 | } | |
8ca151b5 | 1193 | tid_data->state = IWL_AGG_OFF; |
8ca151b5 JB |
1194 | ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); |
1195 | break; | |
1196 | ||
1197 | default: | |
1198 | break; | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1203 | const char *iwl_mvm_get_tx_fail_reason(u32 status) | |
1204 | { | |
1205 | #define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x | |
1206 | #define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x | |
1207 | ||
1208 | switch (status & TX_STATUS_MSK) { | |
1209 | case TX_STATUS_SUCCESS: | |
1210 | return "SUCCESS"; | |
1211 | TX_STATUS_POSTPONE(DELAY); | |
1212 | TX_STATUS_POSTPONE(FEW_BYTES); | |
1213 | TX_STATUS_POSTPONE(BT_PRIO); | |
1214 | TX_STATUS_POSTPONE(QUIET_PERIOD); | |
1215 | TX_STATUS_POSTPONE(CALC_TTAK); | |
1216 | TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY); | |
1217 | TX_STATUS_FAIL(SHORT_LIMIT); | |
1218 | TX_STATUS_FAIL(LONG_LIMIT); | |
1219 | TX_STATUS_FAIL(UNDERRUN); | |
1220 | TX_STATUS_FAIL(DRAIN_FLOW); | |
1221 | TX_STATUS_FAIL(RFKILL_FLUSH); | |
1222 | TX_STATUS_FAIL(LIFE_EXPIRE); | |
1223 | TX_STATUS_FAIL(DEST_PS); | |
1224 | TX_STATUS_FAIL(HOST_ABORTED); | |
1225 | TX_STATUS_FAIL(BT_RETRY); | |
1226 | TX_STATUS_FAIL(STA_INVALID); | |
1227 | TX_STATUS_FAIL(FRAG_DROPPED); | |
1228 | TX_STATUS_FAIL(TID_DISABLE); | |
1229 | TX_STATUS_FAIL(FIFO_FLUSHED); | |
1230 | TX_STATUS_FAIL(SMALL_CF_POLL); | |
1231 | TX_STATUS_FAIL(FW_DROP); | |
1232 | TX_STATUS_FAIL(STA_COLOR_MISMATCH); | |
1233 | } | |
1234 | ||
1235 | return "UNKNOWN"; | |
1236 | ||
1237 | #undef TX_STATUS_FAIL | |
1238 | #undef TX_STATUS_POSTPONE | |
1239 | } | |
1240 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
1241 | ||
d310e405 | 1242 | void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags, |
57fbcce3 | 1243 | enum nl80211_band band, |
d310e405 | 1244 | struct ieee80211_tx_rate *r) |
8ca151b5 | 1245 | { |
8ca151b5 JB |
1246 | if (rate_n_flags & RATE_HT_MCS_GF_MSK) |
1247 | r->flags |= IEEE80211_TX_RC_GREEN_FIELD; | |
1248 | switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) { | |
1249 | case RATE_MCS_CHAN_WIDTH_20: | |
1250 | break; | |
1251 | case RATE_MCS_CHAN_WIDTH_40: | |
1252 | r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
1253 | break; | |
1254 | case RATE_MCS_CHAN_WIDTH_80: | |
1255 | r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH; | |
1256 | break; | |
1257 | case RATE_MCS_CHAN_WIDTH_160: | |
1258 | r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH; | |
1259 | break; | |
1260 | } | |
1261 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
1262 | r->flags |= IEEE80211_TX_RC_SHORT_GI; | |
1263 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
1264 | r->flags |= IEEE80211_TX_RC_MCS; | |
1265 | r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK; | |
1266 | } else if (rate_n_flags & RATE_MCS_VHT_MSK) { | |
1267 | ieee80211_rate_set_vht( | |
1268 | r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK, | |
1269 | ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >> | |
1270 | RATE_VHT_MCS_NSS_POS) + 1); | |
1271 | r->flags |= IEEE80211_TX_RC_VHT_MCS; | |
1272 | } else { | |
1273 | r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags, | |
d310e405 | 1274 | band); |
8ca151b5 JB |
1275 | } |
1276 | } | |
1277 | ||
d310e405 ES |
1278 | /** |
1279 | * translate ucode response to mac80211 tx status control values | |
1280 | */ | |
1281 | static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags, | |
1282 | struct ieee80211_tx_info *info) | |
1283 | { | |
1284 | struct ieee80211_tx_rate *r = &info->status.rates[0]; | |
1285 | ||
1286 | info->status.antenna = | |
1287 | ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS); | |
1288 | iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r); | |
1289 | } | |
1290 | ||
25657fec GBA |
1291 | static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm, |
1292 | u32 status) | |
1293 | { | |
1294 | struct iwl_fw_dbg_trigger_tlv *trig; | |
1295 | struct iwl_fw_dbg_trigger_tx_status *status_trig; | |
1296 | int i; | |
1297 | ||
1298 | if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS)) | |
1299 | return; | |
1300 | ||
1301 | trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS); | |
1302 | status_trig = (void *)trig->data; | |
1303 | ||
1304 | if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig)) | |
1305 | return; | |
1306 | ||
1307 | for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) { | |
1308 | /* don't collect on status 0 */ | |
1309 | if (!status_trig->statuses[i].status) | |
1310 | break; | |
1311 | ||
1312 | if (status_trig->statuses[i].status != (status & TX_STATUS_MSK)) | |
1313 | continue; | |
1314 | ||
1315 | iwl_mvm_fw_dbg_collect_trig(mvm, trig, | |
1316 | "Tx status %d was received", | |
1317 | status & TX_STATUS_MSK); | |
1318 | break; | |
1319 | } | |
1320 | } | |
1321 | ||
12db294c SS |
1322 | /** |
1323 | * iwl_mvm_get_scd_ssn - returns the SSN of the SCD | |
1324 | * @tx_resp: the Tx response from the fw (agg or non-agg) | |
1325 | * | |
1326 | * When the fw sends an AMPDU, it fetches the MPDUs one after the other. Since | |
1327 | * it can't know that everything will go well until the end of the AMPDU, it | |
1328 | * can't know in advance the number of MPDUs that will be sent in the current | |
1329 | * batch. This is why it writes the agg Tx response while it fetches the MPDUs. | |
1330 | * Hence, it can't know in advance what the SSN of the SCD will be at the end | |
1331 | * of the batch. This is why the SSN of the SCD is written at the end of the | |
1332 | * whole struct at a variable offset. This function knows how to cope with the | |
1333 | * variable offset and returns the SSN of the SCD. | |
1334 | */ | |
1335 | static inline u32 iwl_mvm_get_scd_ssn(struct iwl_mvm *mvm, | |
1336 | struct iwl_mvm_tx_resp *tx_resp) | |
1337 | { | |
1338 | return le32_to_cpup((__le32 *)iwl_mvm_get_agg_status(mvm, tx_resp) + | |
1339 | tx_resp->frame_count) & 0xfff; | |
1340 | } | |
1341 | ||
8ca151b5 JB |
1342 | static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, |
1343 | struct iwl_rx_packet *pkt) | |
1344 | { | |
1345 | struct ieee80211_sta *sta; | |
1346 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
1347 | int txq_id = SEQ_TO_QUEUE(sequence); | |
a6a62193 | 1348 | /* struct iwl_mvm_tx_resp_v3 is almost the same */ |
8ca151b5 JB |
1349 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; |
1350 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
1351 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
12db294c SS |
1352 | struct agg_tx_status *agg_status = |
1353 | iwl_mvm_get_agg_status(mvm, tx_resp); | |
1354 | u32 status = le16_to_cpu(agg_status->status); | |
1355 | u16 ssn = iwl_mvm_get_scd_ssn(mvm, tx_resp); | |
8ca151b5 JB |
1356 | struct iwl_mvm_sta *mvmsta; |
1357 | struct sk_buff_head skbs; | |
1358 | u8 skb_freed = 0; | |
ea42d1cb | 1359 | u8 lq_color; |
8ca151b5 | 1360 | u16 next_reclaimed, seq_ctl; |
532beba3 | 1361 | bool is_ndp = false; |
8ca151b5 JB |
1362 | |
1363 | __skb_queue_head_init(&skbs); | |
1364 | ||
12db294c | 1365 | if (iwl_mvm_has_new_tx_api(mvm)) |
a6a62193 | 1366 | txq_id = le16_to_cpu(tx_resp->tx_queue); |
12db294c | 1367 | |
8ca151b5 JB |
1368 | seq_ctl = le16_to_cpu(tx_resp->seq_ctl); |
1369 | ||
1370 | /* we can free until ssn % q.n_bd not inclusive */ | |
1371 | iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs); | |
1372 | ||
1373 | while (!skb_queue_empty(&skbs)) { | |
1374 | struct sk_buff *skb = __skb_dequeue(&skbs); | |
1375 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
1376 | ||
1377 | skb_freed++; | |
1378 | ||
1379 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); | |
1380 | ||
1381 | memset(&info->status, 0, sizeof(info->status)); | |
1382 | ||
8ca151b5 JB |
1383 | /* inform mac80211 about what happened with the frame */ |
1384 | switch (status & TX_STATUS_MSK) { | |
1385 | case TX_STATUS_SUCCESS: | |
1386 | case TX_STATUS_DIRECT_DONE: | |
1387 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1388 | break; | |
1389 | case TX_STATUS_FAIL_DEST_PS: | |
9a3fcf91 SS |
1390 | /* In DQA, the FW should have stopped the queue and not |
1391 | * return this status | |
1392 | */ | |
1393 | WARN_ON(iwl_mvm_is_dqa_supported(mvm)); | |
8ca151b5 JB |
1394 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
1395 | break; | |
1396 | default: | |
1397 | break; | |
1398 | } | |
1399 | ||
25657fec GBA |
1400 | iwl_mvm_tx_status_check_trigger(mvm, status); |
1401 | ||
8ca151b5 | 1402 | info->status.rates[0].count = tx_resp->failure_frame + 1; |
d310e405 ES |
1403 | iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate), |
1404 | info); | |
929e6ede ES |
1405 | info->status.status_driver_data[1] = |
1406 | (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate); | |
8ca151b5 JB |
1407 | |
1408 | /* Single frame failure in an AMPDU queue => send BAR */ | |
c56108b5 | 1409 | if (info->flags & IEEE80211_TX_CTL_AMPDU && |
9ce578a5 ES |
1410 | !(info->flags & IEEE80211_TX_STAT_ACK) && |
1411 | !(info->flags & IEEE80211_TX_STAT_TX_FILTERED)) | |
8ca151b5 | 1412 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
c56108b5 | 1413 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
8ca151b5 | 1414 | |
ebea2f32 EG |
1415 | /* W/A FW bug: seq_ctl is wrong when the status isn't success */ |
1416 | if (status != TX_STATUS_SUCCESS) { | |
8ca151b5 JB |
1417 | struct ieee80211_hdr *hdr = (void *)skb->data; |
1418 | seq_ctl = le16_to_cpu(hdr->seq_ctrl); | |
1419 | } | |
1420 | ||
532beba3 EG |
1421 | if (unlikely(!seq_ctl)) { |
1422 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
1423 | ||
1424 | /* | |
1425 | * If it is an NDP, we can't update next_reclaim since | |
1426 | * its sequence control is 0. Note that for that same | |
1427 | * reason, NDPs are never sent to A-MPDU'able queues | |
1428 | * so that we can never have more than one freed frame | |
1429 | * for a single Tx resonse (see WARN_ON below). | |
1430 | */ | |
1431 | if (ieee80211_is_qos_nullfunc(hdr->frame_control)) | |
1432 | is_ndp = true; | |
1433 | } | |
1434 | ||
9b5452fd EG |
1435 | /* |
1436 | * TODO: this is not accurate if we are freeing more than one | |
1437 | * packet. | |
1438 | */ | |
1439 | info->status.tx_time = | |
1440 | le16_to_cpu(tx_resp->wireless_media_time); | |
3a84b69e | 1441 | BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1); |
ea42d1cb | 1442 | lq_color = TX_RES_RATE_TABLE_COL_GET(tx_resp->tlc_info); |
3a84b69e | 1443 | info->status.status_driver_data[0] = |
ea42d1cb | 1444 | RS_DRV_DATA_PACK(lq_color, tx_resp->reduced_tpc); |
3a84b69e | 1445 | |
f14d6b39 | 1446 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 JB |
1447 | } |
1448 | ||
c56108b5 | 1449 | if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) { |
8ca151b5 JB |
1450 | /* If this is an aggregation queue, we use the ssn since: |
1451 | * ssn = wifi seq_num % 256. | |
1452 | * The seq_ctl is the sequence control of the packet to which | |
1453 | * this Tx response relates. But if there is a hole in the | |
1454 | * bitmap of the BA we received, this Tx response may allow to | |
1455 | * reclaim the hole and all the subsequent packets that were | |
1456 | * already acked. In that case, seq_ctl != ssn, and the next | |
1457 | * packet to be reclaimed will be ssn and not seq_ctl. In that | |
1458 | * case, several packets will be reclaimed even if | |
1459 | * frame_count = 1. | |
1460 | * | |
1461 | * The ssn is the index (% 256) of the latest packet that has | |
1462 | * treated (acked / dropped) + 1. | |
1463 | */ | |
1464 | next_reclaimed = ssn; | |
1465 | } else { | |
1466 | /* The next packet to be reclaimed is the one after this one */ | |
9a886586 | 1467 | next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10); |
8ca151b5 JB |
1468 | } |
1469 | ||
1470 | IWL_DEBUG_TX_REPLY(mvm, | |
8c6e83d6 EG |
1471 | "TXQ %d status %s (0x%08x)\n", |
1472 | txq_id, iwl_mvm_get_tx_fail_reason(status), status); | |
1473 | ||
1474 | IWL_DEBUG_TX_REPLY(mvm, | |
1475 | "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n", | |
1476 | le32_to_cpu(tx_resp->initial_rate), | |
8ca151b5 JB |
1477 | tx_resp->failure_frame, SEQ_TO_INDEX(sequence), |
1478 | ssn, next_reclaimed, seq_ctl); | |
1479 | ||
1480 | rcu_read_lock(); | |
1481 | ||
1482 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
9bb0c1ad EG |
1483 | /* |
1484 | * sta can't be NULL otherwise it'd mean that the sta has been freed in | |
1485 | * the firmware while we still have packets for it in the Tx queues. | |
1486 | */ | |
1487 | if (WARN_ON_ONCE(!sta)) | |
1488 | goto out; | |
8ca151b5 | 1489 | |
9bb0c1ad | 1490 | if (!IS_ERR(sta)) { |
5b577a90 | 1491 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 | 1492 | |
c65f4e03 | 1493 | if (tid != IWL_TID_NON_QOS && tid != IWL_MGMT_TID) { |
8ca151b5 JB |
1494 | struct iwl_mvm_tid_data *tid_data = |
1495 | &mvmsta->tid_data[tid]; | |
36be0eb6 | 1496 | bool send_eosp_ndp = false; |
8ca151b5 | 1497 | |
2bfb5092 | 1498 | spin_lock_bh(&mvmsta->lock); |
cf961e16 | 1499 | |
532beba3 EG |
1500 | if (!is_ndp) { |
1501 | tid_data->next_reclaimed = next_reclaimed; | |
1502 | IWL_DEBUG_TX_REPLY(mvm, | |
1503 | "Next reclaimed packet:%d\n", | |
1504 | next_reclaimed); | |
1505 | } else { | |
1506 | IWL_DEBUG_TX_REPLY(mvm, | |
1507 | "NDP - don't update next_reclaimed\n"); | |
1508 | } | |
1509 | ||
8ca151b5 | 1510 | iwl_mvm_check_ratid_empty(mvm, sta, tid); |
36be0eb6 EG |
1511 | |
1512 | if (mvmsta->sleep_tx_count) { | |
1513 | mvmsta->sleep_tx_count--; | |
1514 | if (mvmsta->sleep_tx_count && | |
dd32162d | 1515 | !iwl_mvm_tid_queued(mvm, tid_data)) { |
36be0eb6 EG |
1516 | /* |
1517 | * The number of frames in the queue | |
1518 | * dropped to 0 even if we sent less | |
1519 | * frames than we thought we had on the | |
1520 | * Tx queue. | |
1521 | * This means we had holes in the BA | |
1522 | * window that we just filled, ask | |
1523 | * mac80211 to send EOSP since the | |
1524 | * firmware won't know how to do that. | |
1525 | * Send NDP and the firmware will send | |
1526 | * EOSP notification that will trigger | |
1527 | * a call to ieee80211_sta_eosp(). | |
1528 | */ | |
1529 | send_eosp_ndp = true; | |
1530 | } | |
1531 | } | |
1532 | ||
2bfb5092 | 1533 | spin_unlock_bh(&mvmsta->lock); |
36be0eb6 EG |
1534 | if (send_eosp_ndp) { |
1535 | iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, | |
1536 | IEEE80211_FRAME_RELEASE_UAPSD, | |
1537 | 1, tid, false, false); | |
1538 | mvmsta->sleep_tx_count = 0; | |
1539 | ieee80211_send_eosp_nullfunc(sta, tid); | |
1540 | } | |
8ca151b5 | 1541 | } |
3e56eadf JB |
1542 | |
1543 | if (mvmsta->next_status_eosp) { | |
1544 | mvmsta->next_status_eosp = false; | |
1545 | ieee80211_sta_eosp(sta); | |
1546 | } | |
8ca151b5 | 1547 | } else { |
8ca151b5 JB |
1548 | mvmsta = NULL; |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * If the txq is not an AMPDU queue, there is no chance we freed | |
1553 | * several skbs. Check that out... | |
8ca151b5 | 1554 | */ |
9a3fcf91 | 1555 | if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) |
9bb0c1ad EG |
1556 | goto out; |
1557 | ||
1558 | /* We can't free more than one frame at once on a shared queue */ | |
9a3fcf91 | 1559 | WARN_ON(skb_freed > 1); |
9bb0c1ad | 1560 | |
589a6ba4 | 1561 | /* If we have still frames for this STA nothing to do here */ |
9bb0c1ad EG |
1562 | if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) |
1563 | goto out; | |
1564 | ||
1565 | if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) { | |
003e5236 | 1566 | |
9bb0c1ad | 1567 | /* |
003e5236 AO |
1568 | * If there are no pending frames for this STA and |
1569 | * the tx to this station is not disabled, notify | |
1570 | * mac80211 that this station can now wake up in its | |
9bb0c1ad EG |
1571 | * STA table. |
1572 | * If mvmsta is not NULL, sta is valid. | |
1573 | */ | |
003e5236 AO |
1574 | |
1575 | spin_lock_bh(&mvmsta->lock); | |
1576 | ||
1577 | if (!mvmsta->disable_tx) | |
1578 | ieee80211_sta_block_awake(mvm->hw, sta, false); | |
1579 | ||
1580 | spin_unlock_bh(&mvmsta->lock); | |
9bb0c1ad EG |
1581 | } |
1582 | ||
1583 | if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) { | |
1584 | /* | |
1585 | * We are draining and this was the last packet - pre_rcu_remove | |
1586 | * has been called already. We might be after the | |
1587 | * synchronize_net already. | |
1588 | * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues. | |
1589 | */ | |
1590 | set_bit(sta_id, mvm->sta_drained); | |
1591 | schedule_work(&mvm->sta_drained_wk); | |
8ca151b5 JB |
1592 | } |
1593 | ||
9bb0c1ad | 1594 | out: |
8ca151b5 JB |
1595 | rcu_read_unlock(); |
1596 | } | |
1597 | ||
1598 | #ifdef CONFIG_IWLWIFI_DEBUG | |
1599 | #define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x | |
1600 | static const char *iwl_get_agg_tx_status(u16 status) | |
1601 | { | |
1602 | switch (status & AGG_TX_STATE_STATUS_MSK) { | |
1603 | AGG_TX_STATE_(TRANSMITTED); | |
1604 | AGG_TX_STATE_(UNDERRUN); | |
1605 | AGG_TX_STATE_(BT_PRIO); | |
1606 | AGG_TX_STATE_(FEW_BYTES); | |
1607 | AGG_TX_STATE_(ABORT); | |
1608 | AGG_TX_STATE_(LAST_SENT_TTL); | |
1609 | AGG_TX_STATE_(LAST_SENT_TRY_CNT); | |
1610 | AGG_TX_STATE_(LAST_SENT_BT_KILL); | |
1611 | AGG_TX_STATE_(SCD_QUERY); | |
1612 | AGG_TX_STATE_(TEST_BAD_CRC32); | |
1613 | AGG_TX_STATE_(RESPONSE); | |
1614 | AGG_TX_STATE_(DUMP_TX); | |
1615 | AGG_TX_STATE_(DELAY_TX); | |
1616 | } | |
1617 | ||
1618 | return "UNKNOWN"; | |
1619 | } | |
1620 | ||
1621 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
1622 | struct iwl_rx_packet *pkt) | |
1623 | { | |
1624 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
12db294c SS |
1625 | struct agg_tx_status *frame_status = |
1626 | iwl_mvm_get_agg_status(mvm, tx_resp); | |
8ca151b5 JB |
1627 | int i; |
1628 | ||
1629 | for (i = 0; i < tx_resp->frame_count; i++) { | |
1630 | u16 fstatus = le16_to_cpu(frame_status[i].status); | |
1631 | ||
1632 | IWL_DEBUG_TX_REPLY(mvm, | |
1633 | "status %s (0x%04x), try-count (%d) seq (0x%x)\n", | |
1634 | iwl_get_agg_tx_status(fstatus), | |
1635 | fstatus & AGG_TX_STATE_STATUS_MSK, | |
1636 | (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >> | |
1637 | AGG_TX_STATE_TRY_CNT_POS, | |
1638 | le16_to_cpu(frame_status[i].sequence)); | |
1639 | } | |
1640 | } | |
1641 | #else | |
1642 | static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm, | |
1643 | struct iwl_rx_packet *pkt) | |
1644 | {} | |
1645 | #endif /* CONFIG_IWLWIFI_DEBUG */ | |
1646 | ||
1647 | static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm, | |
1648 | struct iwl_rx_packet *pkt) | |
1649 | { | |
1650 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1651 | int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid); | |
1652 | int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid); | |
1653 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
13303c0f | 1654 | struct iwl_mvm_sta *mvmsta; |
cf961e16 | 1655 | int queue = SEQ_TO_QUEUE(sequence); |
8ca151b5 | 1656 | |
cf961e16 LK |
1657 | if (WARN_ON_ONCE(queue < mvm->first_agg_queue && |
1658 | (!iwl_mvm_is_dqa_supported(mvm) || | |
1659 | (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE)))) | |
8ca151b5 JB |
1660 | return; |
1661 | ||
1662 | if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS)) | |
1663 | return; | |
1664 | ||
1665 | iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt); | |
1666 | ||
1667 | rcu_read_lock(); | |
1668 | ||
13303c0f | 1669 | mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); |
8ca151b5 | 1670 | |
13303c0f | 1671 | if (!WARN_ON_ONCE(!mvmsta)) { |
8ca151b5 JB |
1672 | mvmsta->tid_data[tid].rate_n_flags = |
1673 | le32_to_cpu(tx_resp->initial_rate); | |
9b5452fd EG |
1674 | mvmsta->tid_data[tid].tx_time = |
1675 | le16_to_cpu(tx_resp->wireless_media_time); | |
ea42d1cb GG |
1676 | mvmsta->tid_data[tid].lq_color = |
1677 | (tx_resp->tlc_info & TX_RES_RATE_TABLE_COLOR_MSK) >> | |
1678 | TX_RES_RATE_TABLE_COLOR_POS; | |
8ca151b5 JB |
1679 | } |
1680 | ||
1681 | rcu_read_unlock(); | |
1682 | } | |
1683 | ||
0416841d | 1684 | void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
8ca151b5 JB |
1685 | { |
1686 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1687 | struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data; | |
1688 | ||
1689 | if (tx_resp->frame_count == 1) | |
1690 | iwl_mvm_rx_tx_cmd_single(mvm, pkt); | |
1691 | else | |
1692 | iwl_mvm_rx_tx_cmd_agg(mvm, pkt); | |
8ca151b5 JB |
1693 | } |
1694 | ||
c46e7724 SS |
1695 | static void iwl_mvm_tx_reclaim(struct iwl_mvm *mvm, int sta_id, int tid, |
1696 | int txq, int index, | |
1697 | struct ieee80211_tx_info *ba_info, u32 rate) | |
8ca151b5 | 1698 | { |
8ca151b5 JB |
1699 | struct sk_buff_head reclaimed_skbs; |
1700 | struct iwl_mvm_tid_data *tid_data; | |
8ca151b5 JB |
1701 | struct ieee80211_sta *sta; |
1702 | struct iwl_mvm_sta *mvmsta; | |
8ca151b5 | 1703 | struct sk_buff *skb; |
c46e7724 | 1704 | int freed; |
8ca151b5 | 1705 | |
2cee4762 ES |
1706 | if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT || |
1707 | tid >= IWL_MAX_TID_COUNT, | |
1708 | "sta_id %d tid %d", sta_id, tid)) | |
0416841d | 1709 | return; |
2cee4762 | 1710 | |
8ca151b5 JB |
1711 | rcu_read_lock(); |
1712 | ||
1713 | sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]); | |
1714 | ||
1715 | /* Reclaiming frames for a station that has been deleted ? */ | |
1716 | if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) { | |
1717 | rcu_read_unlock(); | |
0416841d | 1718 | return; |
8ca151b5 JB |
1719 | } |
1720 | ||
5b577a90 | 1721 | mvmsta = iwl_mvm_sta_from_mac80211(sta); |
8ca151b5 JB |
1722 | tid_data = &mvmsta->tid_data[tid]; |
1723 | ||
c46e7724 | 1724 | if (tid_data->txq_id != txq) { |
1f16ea29 | 1725 | IWL_ERR(mvm, |
c46e7724 SS |
1726 | "invalid BA notification: Q %d, tid %d\n", |
1727 | tid_data->txq_id, tid); | |
8ca151b5 | 1728 | rcu_read_unlock(); |
0416841d | 1729 | return; |
8ca151b5 JB |
1730 | } |
1731 | ||
2bfb5092 | 1732 | spin_lock_bh(&mvmsta->lock); |
8ca151b5 JB |
1733 | |
1734 | __skb_queue_head_init(&reclaimed_skbs); | |
1735 | ||
1736 | /* | |
1737 | * Release all TFDs before the SSN, i.e. all TFDs in front of | |
1738 | * block-ack window (we assume that they've been successfully | |
1739 | * transmitted ... if not, it's too late anyway). | |
1740 | */ | |
c46e7724 | 1741 | iwl_trans_reclaim(mvm->trans, txq, index, &reclaimed_skbs); |
8ca151b5 | 1742 | |
c46e7724 | 1743 | tid_data->next_reclaimed = index; |
8ca151b5 JB |
1744 | |
1745 | iwl_mvm_check_ratid_empty(mvm, sta, tid); | |
1746 | ||
1747 | freed = 0; | |
ea42d1cb GG |
1748 | |
1749 | /* pack lq color from tid_data along the reduced txp */ | |
1750 | ba_info->status.status_driver_data[0] = | |
1751 | RS_DRV_DATA_PACK(tid_data->lq_color, | |
1752 | ba_info->status.status_driver_data[0]); | |
c46e7724 | 1753 | ba_info->status.status_driver_data[1] = (void *)(uintptr_t)rate; |
8ca151b5 JB |
1754 | |
1755 | skb_queue_walk(&reclaimed_skbs, skb) { | |
143582c6 JB |
1756 | struct ieee80211_hdr *hdr = (void *)skb->data; |
1757 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
8ca151b5 JB |
1758 | |
1759 | if (ieee80211_is_data_qos(hdr->frame_control)) | |
1760 | freed++; | |
1761 | else | |
1762 | WARN_ON_ONCE(1); | |
1763 | ||
8ca151b5 JB |
1764 | iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]); |
1765 | ||
143582c6 JB |
1766 | memset(&info->status, 0, sizeof(info->status)); |
1767 | /* Packet was transmitted successfully, failures come as single | |
1768 | * frames because before failing a frame the firmware transmits | |
1769 | * it without aggregation at least once. | |
1770 | */ | |
1771 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1772 | ||
a7130442 ES |
1773 | /* this is the first skb we deliver in this batch */ |
1774 | /* put the rate scaling data there */ | |
c46e7724 SS |
1775 | if (freed == 1) { |
1776 | info->flags |= IEEE80211_TX_STAT_AMPDU; | |
1777 | memcpy(&info->status, &ba_info->status, | |
1778 | sizeof(ba_info->status)); | |
1779 | iwl_mvm_hwrate_to_tx_status(rate, info); | |
1780 | } | |
8ca151b5 JB |
1781 | } |
1782 | ||
2bfb5092 | 1783 | spin_unlock_bh(&mvmsta->lock); |
8ca151b5 | 1784 | |
a7130442 ES |
1785 | /* We got a BA notif with 0 acked or scd_ssn didn't progress which is |
1786 | * possible (i.e. first MPDU in the aggregation wasn't acked) | |
1787 | * Still it's important to update RS about sent vs. acked. | |
1788 | */ | |
1789 | if (skb_queue_empty(&reclaimed_skbs)) { | |
a7130442 ES |
1790 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; |
1791 | ||
1792 | if (mvmsta->vif) | |
1793 | chanctx_conf = | |
1794 | rcu_dereference(mvmsta->vif->chanctx_conf); | |
1795 | ||
1796 | if (WARN_ON_ONCE(!chanctx_conf)) | |
1797 | goto out; | |
1798 | ||
c46e7724 SS |
1799 | ba_info->band = chanctx_conf->def.chan->band; |
1800 | iwl_mvm_hwrate_to_tx_status(rate, ba_info); | |
a7130442 ES |
1801 | |
1802 | IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n"); | |
c46e7724 | 1803 | iwl_mvm_rs_tx_status(mvm, sta, tid, ba_info, false); |
a7130442 ES |
1804 | } |
1805 | ||
1806 | out: | |
8ca151b5 JB |
1807 | rcu_read_unlock(); |
1808 | ||
1809 | while (!skb_queue_empty(&reclaimed_skbs)) { | |
1810 | skb = __skb_dequeue(&reclaimed_skbs); | |
f14d6b39 | 1811 | ieee80211_tx_status(mvm->hw, skb); |
8ca151b5 | 1812 | } |
8ca151b5 JB |
1813 | } |
1814 | ||
c46e7724 SS |
1815 | void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb) |
1816 | { | |
1817 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
1818 | int sta_id, tid, txq, index; | |
1819 | struct ieee80211_tx_info ba_info = {}; | |
1820 | struct iwl_mvm_ba_notif *ba_notif; | |
1821 | struct iwl_mvm_tid_data *tid_data; | |
1822 | struct iwl_mvm_sta *mvmsta; | |
1823 | ||
1824 | if (iwl_mvm_has_new_tx_api(mvm)) { | |
1825 | struct iwl_mvm_compressed_ba_notif *ba_res = | |
1826 | (void *)pkt->data; | |
cba46988 | 1827 | int i; |
c46e7724 SS |
1828 | |
1829 | sta_id = ba_res->sta_id; | |
1830 | ba_info.status.ampdu_ack_len = (u8)le16_to_cpu(ba_res->done); | |
1831 | ba_info.status.ampdu_len = (u8)le16_to_cpu(ba_res->txed); | |
1832 | ba_info.status.tx_time = | |
1833 | (u16)le32_to_cpu(ba_res->wireless_time); | |
1834 | ba_info.status.status_driver_data[0] = | |
1835 | (void *)(uintptr_t)ba_res->reduced_txp; | |
1836 | ||
9b1ea167 SS |
1837 | if (!le16_to_cpu(ba_res->tfd_cnt)) |
1838 | goto out; | |
1839 | ||
cba46988 LK |
1840 | /* Free per TID */ |
1841 | for (i = 0; i < le16_to_cpu(ba_res->tfd_cnt); i++) { | |
1842 | struct iwl_mvm_compressed_ba_tfd *ba_tfd = | |
1843 | &ba_res->tfd[i]; | |
1844 | ||
1845 | iwl_mvm_tx_reclaim(mvm, sta_id, ba_tfd->tid, | |
1846 | (int)(le16_to_cpu(ba_tfd->q_num)), | |
1847 | le16_to_cpu(ba_tfd->tfd_index), | |
1848 | &ba_info, | |
1849 | le32_to_cpu(ba_res->tx_rate)); | |
1850 | } | |
c46e7724 | 1851 | |
9b1ea167 | 1852 | out: |
c46e7724 SS |
1853 | IWL_DEBUG_TX_REPLY(mvm, |
1854 | "BA_NOTIFICATION Received from sta_id = %d, flags %x, sent:%d, acked:%d\n", | |
1855 | sta_id, le32_to_cpu(ba_res->flags), | |
1856 | le16_to_cpu(ba_res->txed), | |
1857 | le16_to_cpu(ba_res->done)); | |
1858 | return; | |
1859 | } | |
1860 | ||
1861 | ba_notif = (void *)pkt->data; | |
1862 | sta_id = ba_notif->sta_id; | |
1863 | tid = ba_notif->tid; | |
1864 | /* "flow" corresponds to Tx queue */ | |
1865 | txq = le16_to_cpu(ba_notif->scd_flow); | |
1866 | /* "ssn" is start of block-ack Tx window, corresponds to index | |
1867 | * (in Tx queue's circular buffer) of first TFD/frame in window */ | |
1868 | index = le16_to_cpu(ba_notif->scd_ssn); | |
1869 | ||
1870 | rcu_read_lock(); | |
1871 | mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id); | |
1872 | if (WARN_ON_ONCE(!mvmsta)) { | |
1873 | rcu_read_unlock(); | |
1874 | return; | |
1875 | } | |
1876 | ||
1877 | tid_data = &mvmsta->tid_data[tid]; | |
1878 | ||
1879 | ba_info.status.ampdu_ack_len = ba_notif->txed_2_done; | |
1880 | ba_info.status.ampdu_len = ba_notif->txed; | |
1881 | ba_info.status.tx_time = tid_data->tx_time; | |
1882 | ba_info.status.status_driver_data[0] = | |
1883 | (void *)(uintptr_t)ba_notif->reduced_txp; | |
1884 | ||
1885 | rcu_read_unlock(); | |
1886 | ||
1887 | iwl_mvm_tx_reclaim(mvm, sta_id, tid, txq, index, &ba_info, | |
1888 | tid_data->rate_n_flags); | |
1889 | ||
1890 | IWL_DEBUG_TX_REPLY(mvm, | |
1891 | "BA_NOTIFICATION Received from %pM, sta_id = %d\n", | |
3dc6dd96 | 1892 | ba_notif->sta_addr, ba_notif->sta_id); |
c46e7724 SS |
1893 | |
1894 | IWL_DEBUG_TX_REPLY(mvm, | |
1895 | "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n", | |
1896 | ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl), | |
1897 | le64_to_cpu(ba_notif->bitmap), txq, index, | |
1898 | ba_notif->txed, ba_notif->txed_2_done); | |
1899 | ||
1900 | IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n", | |
1901 | ba_notif->reduced_txp); | |
1902 | } | |
1903 | ||
fe92e32a EG |
1904 | /* |
1905 | * Note that there are transports that buffer frames before they reach | |
1906 | * the firmware. This means that after flush_tx_path is called, the | |
1907 | * queue might not be empty. The race-free way to handle this is to: | |
1908 | * 1) set the station as draining | |
1909 | * 2) flush the Tx path | |
1910 | * 3) wait for the transport queues to be empty | |
1911 | */ | |
5888a40c | 1912 | int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags) |
8ca151b5 JB |
1913 | { |
1914 | int ret; | |
d167e81a | 1915 | struct iwl_tx_path_flush_cmd_v1 flush_cmd = { |
8ca151b5 JB |
1916 | .queues_ctl = cpu_to_le32(tfd_msk), |
1917 | .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH), | |
1918 | }; | |
1919 | ||
d167e81a MG |
1920 | WARN_ON(iwl_mvm_has_new_tx_api(mvm)); |
1921 | ||
8ca151b5 JB |
1922 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, |
1923 | sizeof(flush_cmd), &flush_cmd); | |
1924 | if (ret) | |
1925 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
1926 | return ret; | |
1927 | } | |
d49394a1 | 1928 | |
d167e81a MG |
1929 | int iwl_mvm_flush_sta_tids(struct iwl_mvm *mvm, u32 sta_id, |
1930 | u16 tids, u32 flags) | |
d49394a1 | 1931 | { |
d167e81a MG |
1932 | int ret; |
1933 | struct iwl_tx_path_flush_cmd flush_cmd = { | |
1934 | .sta_id = cpu_to_le32(sta_id), | |
1935 | .tid_mask = cpu_to_le16(tids), | |
1936 | }; | |
d49394a1 | 1937 | |
d167e81a | 1938 | WARN_ON(!iwl_mvm_has_new_tx_api(mvm)); |
d49394a1 | 1939 | |
d167e81a MG |
1940 | ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags, |
1941 | sizeof(flush_cmd), &flush_cmd); | |
1942 | if (ret) | |
1943 | IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret); | |
1944 | return ret; | |
1945 | } | |
d49394a1 | 1946 | |
d167e81a MG |
1947 | int iwl_mvm_flush_sta(struct iwl_mvm *mvm, void *sta, bool internal, u32 flags) |
1948 | { | |
1949 | struct iwl_mvm_int_sta *int_sta = sta; | |
1950 | struct iwl_mvm_sta *mvm_sta = sta; | |
1951 | ||
1952 | if (iwl_mvm_has_new_tx_api(mvm)) { | |
1953 | if (internal) | |
1954 | return iwl_mvm_flush_sta_tids(mvm, int_sta->sta_id, | |
1955 | BIT(IWL_MGMT_TID), flags); | |
1956 | ||
1957 | return iwl_mvm_flush_sta_tids(mvm, mvm_sta->sta_id, | |
1958 | 0xFF, flags); | |
d49394a1 SS |
1959 | } |
1960 | ||
d167e81a MG |
1961 | if (internal) |
1962 | return iwl_mvm_flush_tx_path(mvm, int_sta->tfd_queue_msk, | |
1963 | flags); | |
1964 | ||
1965 | return iwl_mvm_flush_tx_path(mvm, mvm_sta->tfd_queue_msk, flags); | |
d49394a1 | 1966 | } |