blob: f3a6e95cedece8e861923e2b20c74e8061e3941c [file] [log] [blame]
Johannes Berg8ca151b2013-01-24 14:25:36 +01001/******************************************************************************
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 *
Emmanuel Grumbach51368bf2013-12-30 13:15:54 +02008 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
Emmanuel Grumbach42032632015-04-15 12:43:46 +03009 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
Emmanuel Grumbach532beba2016-03-07 22:23:52 +020010 * Copyright(c) 2016 Intel Deutschland GmbH
Johannes Berg8ca151b2013-01-24 14:25:36 +010011 *
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
Emmanuel Grumbach410dc5a2013-02-18 09:22:28 +020027 * in the file called COPYING.
Johannes Berg8ca151b2013-01-24 14:25:36 +010028 *
29 * Contact Information:
Emmanuel Grumbachcb2f8272015-11-17 15:39:56 +020030 * Intel Linux Wireless <linuxwifi@intel.com>
Johannes Berg8ca151b2013-01-24 14:25:36 +010031 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
Emmanuel Grumbach51368bf2013-12-30 13:15:54 +020035 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
Emmanuel Grumbach42032632015-04-15 12:43:46 +030036 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
Johannes Berg8ca151b2013-01-24 14:25:36 +010037 * 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>
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +030068#include <linux/tcp.h>
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +030069#include <net/ip.h>
Sara Sharon5e6a98d2016-03-10 17:40:56 +020070#include <net/ipv6.h>
Johannes Berg8ca151b2013-01-24 14:25:36 +010071
72#include "iwl-trans.h"
73#include "iwl-eeprom-parse.h"
74#include "mvm.h"
75#include "sta.h"
Golan Ben-Ami2f89a5d2015-10-27 19:17:14 +020076#include "fw-dbg.h"
Johannes Berg8ca151b2013-01-24 14:25:36 +010077
Emmanuel Grumbach42032632015-04-15 12:43:46 +030078static void
79iwl_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
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200102#define OPT_HDR(type, skb, off) \
103 (type *)(skb_network_header(skb) + (off))
104
105static 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)) {
Sara Sharonecf51422016-06-08 15:15:41 +0300141 struct ipv6_opt_hdr *hp;
142
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200143 /* only supported extension headers */
144 if (protocol != NEXTHDR_ROUTING &&
145 protocol != NEXTHDR_HOP &&
Sara Sharonecf51422016-06-08 15:15:41 +0300146 protocol != NEXTHDR_DEST) {
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200147 skb_checksum_help(skb);
148 return;
149 }
150
Sara Sharonecf51422016-06-08 15:15:41 +0300151 hp = OPT_HDR(struct ipv6_opt_hdr, skb, off);
152 protocol = hp->nexthdr;
153 off += ipv6_optlen(hp);
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200154 }
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);
162 return;
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
188 /* mac header len should include IV, size is in words */
189 if (info->control.hw_key)
190 mh_len += info->control.hw_key->iv_len;
191 mh_len /= 2;
192 offload_assist |= mh_len << TX_CMD_OFFLD_MH_SIZE;
193
194 tx_cmd->offload_assist = cpu_to_le16(offload_assist);
195#endif
196}
197
Johannes Berg8ca151b2013-01-24 14:25:36 +0100198/*
199 * Sets most of the Tx cmd's fields
200 */
Arik Nemtsov6ce73e62014-09-11 13:00:19 +0300201void iwl_mvm_set_tx_cmd(struct iwl_mvm *mvm, struct sk_buff *skb,
202 struct iwl_tx_cmd *tx_cmd,
203 struct ieee80211_tx_info *info, u8 sta_id)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100204{
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300205 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100206 struct ieee80211_hdr *hdr = (void *)skb->data;
207 __le16 fc = hdr->frame_control;
208 u32 tx_flags = le32_to_cpu(tx_cmd->tx_flags);
209 u32 len = skb->len + FCS_LEN;
Emmanuel Grumbachb797e3f2014-03-06 14:49:36 +0200210 u8 ac;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100211
212 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
213 tx_flags |= TX_CMD_FLG_ACK;
214 else
215 tx_flags &= ~TX_CMD_FLG_ACK;
216
217 if (ieee80211_is_probe_resp(fc))
218 tx_flags |= TX_CMD_FLG_TSF;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100219
Johannes Berg8ca151b2013-01-24 14:25:36 +0100220 if (ieee80211_has_morefrags(fc))
221 tx_flags |= TX_CMD_FLG_MORE_FRAG;
222
223 if (ieee80211_is_data_qos(fc)) {
224 u8 *qc = ieee80211_get_qos_ctl(hdr);
225 tx_cmd->tid_tspec = qc[0] & 0xf;
226 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
Sara Sharond8fe4842016-03-09 10:12:45 +0200227 if (*qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
228 tx_cmd->offload_assist |=
229 cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU));
Eyal Shapira9b3b43d2014-12-31 18:34:56 +0200230 } else if (ieee80211_is_back_req(fc)) {
231 struct ieee80211_bar *bar = (void *)skb->data;
232 u16 control = le16_to_cpu(bar->control);
Emmanuel Grumbach42032632015-04-15 12:43:46 +0300233 u16 ssn = le16_to_cpu(bar->start_seq_num);
Eyal Shapira9b3b43d2014-12-31 18:34:56 +0200234
235 tx_flags |= TX_CMD_FLG_ACK | TX_CMD_FLG_BAR;
236 tx_cmd->tid_tspec = (control &
237 IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
238 IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
239 WARN_ON_ONCE(tx_cmd->tid_tspec >= IWL_MAX_TID_COUNT);
Emmanuel Grumbach42032632015-04-15 12:43:46 +0300240 iwl_mvm_bar_check_trigger(mvm, bar->ra, tx_cmd->tid_tspec,
241 ssn);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100242 } else {
243 tx_cmd->tid_tspec = IWL_TID_NON_QOS;
244 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
245 tx_flags |= TX_CMD_FLG_SEQ_CTL;
246 else
247 tx_flags &= ~TX_CMD_FLG_SEQ_CTL;
248 }
249
Eyal Shapiraa9dc5062014-12-31 17:58:23 +0200250 /* Default to 0 (BE) when tid_spec is set to IWL_TID_NON_QOS */
251 if (tx_cmd->tid_tspec < IWL_MAX_TID_COUNT)
252 ac = tid_to_mac80211_ac[tx_cmd->tid_tspec];
253 else
254 ac = tid_to_mac80211_ac[0];
255
Emmanuel Grumbachb797e3f2014-03-06 14:49:36 +0200256 tx_flags |= iwl_mvm_bt_coex_tx_prio(mvm, hdr, info, ac) <<
257 TX_CMD_FLG_BT_PRIO_POS;
258
Johannes Berg8ca151b2013-01-24 14:25:36 +0100259 if (ieee80211_is_mgmt(fc)) {
260 if (ieee80211_is_assoc_req(fc) || ieee80211_is_reassoc_req(fc))
Avri Altmanb084a352015-07-12 09:10:05 +0300261 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_ASSOC);
262 else if (ieee80211_is_action(fc))
263 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100264 else
Avri Altmanb084a352015-07-12 09:10:05 +0300265 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100266
267 /* The spec allows Action frames in A-MPDU, we don't support
268 * it
269 */
270 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_AMPDU);
Johannes Berg63f75352014-01-31 14:56:18 +0100271 } else if (info->control.flags & IEEE80211_TX_CTRL_PORT_CTRL_PROTO) {
Avri Altmanb084a352015-07-12 09:10:05 +0300272 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_MGMT);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100273 } else {
Avri Altmanb084a352015-07-12 09:10:05 +0300274 tx_cmd->pm_frame_timeout = cpu_to_le16(PM_FRAME_NONE);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100275 }
276
Johannes Berg8ca151b2013-01-24 14:25:36 +0100277 if (ieee80211_is_data(fc) && len > mvm->rts_threshold &&
278 !is_multicast_ether_addr(ieee80211_get_DA(hdr)))
279 tx_flags |= TX_CMD_FLG_PROT_REQUIRE;
280
Johannes Berg859d9142015-06-01 17:11:11 +0200281 if (fw_has_capa(&mvm->fw->ucode_capa,
282 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT) &&
Andrei Otcheretianskif1daa002014-07-01 12:54:25 +0300283 ieee80211_action_contains_tpc(skb))
284 tx_flags |= TX_CMD_FLG_WRITE_TX_POWER;
285
Johannes Berg8ca151b2013-01-24 14:25:36 +0100286 tx_cmd->tx_flags = cpu_to_le32(tx_flags);
287 /* Total # bytes to be transmitted */
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300288 tx_cmd->len = cpu_to_le16((u16)skb->len +
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300289 (uintptr_t)skb_info->driver_data[0]);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100290 tx_cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
291 tx_cmd->sta_id = sta_id;
Sara Sharond8fe4842016-03-09 10:12:45 +0200292
293 /* padding is inserted later in transport */
294 if (ieee80211_hdrlen(fc) % 4 &&
295 !(tx_cmd->offload_assist & cpu_to_le16(BIT(TX_CMD_OFFLD_AMSDU))))
296 tx_cmd->offload_assist |= cpu_to_le16(BIT(TX_CMD_OFFLD_PAD));
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200297
298 iwl_mvm_tx_csum(mvm, skb, hdr, info, tx_cmd);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100299}
300
301/*
302 * Sets the fields in the Tx cmd that are rate related
303 */
Arik Nemtsov6ce73e62014-09-11 13:00:19 +0300304void iwl_mvm_set_tx_cmd_rate(struct iwl_mvm *mvm, struct iwl_tx_cmd *tx_cmd,
305 struct ieee80211_tx_info *info,
306 struct ieee80211_sta *sta, __le16 fc)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100307{
308 u32 rate_flags;
309 int rate_idx;
310 u8 rate_plcp;
311
312 /* Set retry limit on RTS packets */
313 tx_cmd->rts_retry_limit = IWL_RTS_DFAULT_RETRY_LIMIT;
314
315 /* Set retry limit on DATA packets and Probe Responses*/
316 if (ieee80211_is_probe_resp(fc)) {
317 tx_cmd->data_retry_limit = IWL_MGMT_DFAULT_RETRY_LIMIT;
318 tx_cmd->rts_retry_limit =
319 min(tx_cmd->data_retry_limit, tx_cmd->rts_retry_limit);
320 } else if (ieee80211_is_back_req(fc)) {
321 tx_cmd->data_retry_limit = IWL_BAR_DFAULT_RETRY_LIMIT;
322 } else {
323 tx_cmd->data_retry_limit = IWL_DEFAULT_TX_RETRY;
324 }
325
326 /*
Eliad Pellere89044d2013-07-16 17:33:26 +0300327 * for data packets, rate info comes from the table inside the fw. This
Emmanuel Grumbach1ffde692014-10-20 08:29:55 +0300328 * table is controlled by LINK_QUALITY commands
Johannes Berg8ca151b2013-01-24 14:25:36 +0100329 */
330
Emmanuel Grumbach1ffde692014-10-20 08:29:55 +0300331 if (ieee80211_is_data(fc) && sta) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100332 tx_cmd->initial_rate_index = 0;
333 tx_cmd->tx_flags |= cpu_to_le32(TX_CMD_FLG_STA_RATE);
334 return;
335 } else if (ieee80211_is_back_req(fc)) {
Emmanuel Grumbach2edc6ec2013-06-02 19:49:15 +0300336 tx_cmd->tx_flags |=
337 cpu_to_le32(TX_CMD_FLG_ACK | TX_CMD_FLG_BAR);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100338 }
339
340 /* HT rate doesn't make sense for a non data frame */
341 WARN_ONCE(info->control.rates[0].flags & IEEE80211_TX_RC_MCS,
Johannes Bergf85e9d12014-10-08 09:57:29 +0200342 "Got an HT rate (flags:0x%x/mcs:%d) for a non data frame (fc:0x%x)\n",
343 info->control.rates[0].flags,
344 info->control.rates[0].idx,
345 le16_to_cpu(fc));
Johannes Berg8ca151b2013-01-24 14:25:36 +0100346
347 rate_idx = info->control.rates[0].idx;
348 /* if the rate isn't a well known legacy rate, take the lowest one */
349 if (rate_idx < 0 || rate_idx > IWL_RATE_COUNT_LEGACY)
350 rate_idx = rate_lowest_index(
351 &mvm->nvm_data->bands[info->band], sta);
352
353 /* For 5 GHZ band, remap mac80211 rate indices into driver indices */
Johannes Berg57fbcce2016-04-12 15:56:15 +0200354 if (info->band == NL80211_BAND_5GHZ)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100355 rate_idx += IWL_FIRST_OFDM_RATE;
356
357 /* For 2.4 GHZ band, check that there is no need to remap */
358 BUILD_BUG_ON(IWL_FIRST_CCK_RATE != 0);
359
360 /* Get PLCP rate for tx_cmd->rate_n_flags */
361 rate_plcp = iwl_mvm_mac80211_idx_to_hwrate(rate_idx);
362
363 mvm->mgmt_last_antenna_idx =
Moshe Harela0544272014-12-08 21:13:14 +0200364 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
Johannes Berg8ca151b2013-01-24 14:25:36 +0100365 mvm->mgmt_last_antenna_idx);
Emmanuel Grumbach34c8b242014-05-28 21:53:39 +0300366
Johannes Berg57fbcce2016-04-12 15:56:15 +0200367 if (info->band == NL80211_BAND_2GHZ &&
Emmanuel Grumbach34c8b242014-05-28 21:53:39 +0300368 !iwl_mvm_bt_coex_is_shared_ant_avail(mvm))
Emmanuel Grumbach923a8c12015-05-31 21:44:22 +0300369 rate_flags = mvm->cfg->non_shared_ant << RATE_MCS_ANT_POS;
Emmanuel Grumbach34c8b242014-05-28 21:53:39 +0300370 else
371 rate_flags =
372 BIT(mvm->mgmt_last_antenna_idx) << RATE_MCS_ANT_POS;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100373
374 /* Set CCK flag as needed */
375 if ((rate_idx >= IWL_FIRST_CCK_RATE) && (rate_idx <= IWL_LAST_CCK_RATE))
376 rate_flags |= RATE_MCS_CCK_MSK;
377
378 /* Set the rate in the TX cmd */
379 tx_cmd->rate_n_flags = cpu_to_le32((u32)rate_plcp | rate_flags);
380}
381
Ayala Beker2a53d162016-04-07 16:21:57 +0300382static inline void iwl_mvm_set_tx_cmd_pn(struct ieee80211_tx_info *info,
383 u8 *crypto_hdr)
384{
385 struct ieee80211_key_conf *keyconf = info->control.hw_key;
386 u64 pn;
387
388 pn = atomic64_inc_return(&keyconf->tx_pn);
389 crypto_hdr[0] = pn;
390 crypto_hdr[2] = 0;
391 crypto_hdr[3] = 0x20 | (keyconf->keyidx << 6);
392 crypto_hdr[1] = pn >> 8;
393 crypto_hdr[4] = pn >> 16;
394 crypto_hdr[5] = pn >> 24;
395 crypto_hdr[6] = pn >> 32;
396 crypto_hdr[7] = pn >> 40;
397}
398
Johannes Berg8ca151b2013-01-24 14:25:36 +0100399/*
400 * Sets the fields in the Tx cmd that are crypto related
401 */
Johannes Bergca8c0f42015-04-20 17:54:54 +0200402static void iwl_mvm_set_tx_cmd_crypto(struct iwl_mvm *mvm,
403 struct ieee80211_tx_info *info,
404 struct iwl_tx_cmd *tx_cmd,
405 struct sk_buff *skb_frag,
406 int hdrlen)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100407{
408 struct ieee80211_key_conf *keyconf = info->control.hw_key;
Johannes Bergca8c0f42015-04-20 17:54:54 +0200409 u8 *crypto_hdr = skb_frag->data + hdrlen;
410 u64 pn;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100411
412 switch (keyconf->cipher) {
413 case WLAN_CIPHER_SUITE_CCMP:
Johannes Bergca8c0f42015-04-20 17:54:54 +0200414 case WLAN_CIPHER_SUITE_CCMP_256:
415 iwl_mvm_set_tx_cmd_ccmp(info, tx_cmd);
Ayala Beker2a53d162016-04-07 16:21:57 +0300416 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100417 break;
418
419 case WLAN_CIPHER_SUITE_TKIP:
420 tx_cmd->sec_ctl = TX_CMD_SEC_TKIP;
Eliad Peller1ad4f632016-02-14 13:56:36 +0200421 pn = atomic64_inc_return(&keyconf->tx_pn);
422 ieee80211_tkip_add_iv(crypto_hdr, keyconf, pn);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100423 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;
Ayala Beker2a53d162016-04-07 16:21:57 +0300436 case WLAN_CIPHER_SUITE_GCMP:
437 case WLAN_CIPHER_SUITE_GCMP_256:
438 /* TODO: Taking the key from the table might introduce a race
439 * when PTK rekeying is done, having an old packets with a PN
440 * based on the old key but the message encrypted with a new
441 * one.
442 * Need to handle this.
443 */
444 tx_cmd->sec_ctl |= TX_CMD_SEC_GCMP | TC_CMD_SEC_KEY_FROM_TABLE;
445 tx_cmd->key[0] = keyconf->hw_key_idx;
446 iwl_mvm_set_tx_cmd_pn(info, crypto_hdr);
447 break;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100448 default:
Max Stepanove36e5432013-08-27 19:56:13 +0300449 tx_cmd->sec_ctl |= TX_CMD_SEC_EXT;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100450 }
451}
452
453/*
454 * Allocates and sets the Tx cmd the driver data pointers in the skb
455 */
456static struct iwl_device_cmd *
457iwl_mvm_set_tx_params(struct iwl_mvm *mvm, struct sk_buff *skb,
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300458 struct ieee80211_tx_info *info, int hdrlen,
459 struct ieee80211_sta *sta, u8 sta_id)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100460{
461 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300462 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100463 struct iwl_device_cmd *dev_cmd;
464 struct iwl_tx_cmd *tx_cmd;
465
466 dev_cmd = iwl_trans_alloc_tx_cmd(mvm->trans);
467
468 if (unlikely(!dev_cmd))
469 return NULL;
470
471 memset(dev_cmd, 0, sizeof(*dev_cmd));
Emmanuel Grumbach3961a612013-10-22 11:27:55 +0300472 dev_cmd->hdr.cmd = TX_CMD;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100473 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
474
475 if (info->control.hw_key)
Johannes Bergca8c0f42015-04-20 17:54:54 +0200476 iwl_mvm_set_tx_cmd_crypto(mvm, info, tx_cmd, skb, hdrlen);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100477
478 iwl_mvm_set_tx_cmd(mvm, skb, tx_cmd, info, sta_id);
479
480 iwl_mvm_set_tx_cmd_rate(mvm, tx_cmd, info, sta, hdr->frame_control);
481
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300482 memset(&skb_info->status, 0, sizeof(skb_info->status));
483 memset(skb_info->driver_data, 0, sizeof(skb_info->driver_data));
Johannes Berg8ca151b2013-01-24 14:25:36 +0100484
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300485 skb_info->driver_data[1] = dev_cmd;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100486
487 return dev_cmd;
488}
489
Liad Kaufmande24f632015-08-04 15:19:18 +0300490static int iwl_mvm_get_ctrl_vif_queue(struct iwl_mvm *mvm,
491 struct ieee80211_tx_info *info, __le16 fc)
492{
Liad Kaufman4c965132015-08-09 19:26:56 +0300493 if (iwl_mvm_is_dqa_supported(mvm)) {
494 if (info->control.vif->type == NL80211_IFTYPE_AP &&
495 ieee80211_is_probe_resp(fc))
496 return IWL_MVM_DQA_AP_PROBE_RESP_QUEUE;
497 else if (ieee80211_is_mgmt(fc) &&
498 info->control.vif->type == NL80211_IFTYPE_P2P_DEVICE)
499 return IWL_MVM_DQA_P2P_DEVICE_QUEUE;
500 }
Liad Kaufmande24f632015-08-04 15:19:18 +0300501
502 return info->hw_queue;
503}
504
Johannes Berg8ca151b2013-01-24 14:25:36 +0100505int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb)
506{
507 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300508 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
509 struct ieee80211_tx_info info;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100510 struct iwl_device_cmd *dev_cmd;
511 struct iwl_tx_cmd *tx_cmd;
512 u8 sta_id;
Johannes Bergca8c0f42015-04-20 17:54:54 +0200513 int hdrlen = ieee80211_hdrlen(hdr->frame_control);
Liad Kaufmande24f632015-08-04 15:19:18 +0300514 int queue;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100515
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300516 memcpy(&info, skb->cb, sizeof(info));
517
518 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_AMPDU))
Johannes Berg8ca151b2013-01-24 14:25:36 +0100519 return -1;
520
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300521 if (WARN_ON_ONCE(info.flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM &&
522 (!info.control.vif ||
523 info.hw_queue != info.control.vif->cab_queue)))
Johannes Berg8ca151b2013-01-24 14:25:36 +0100524 return -1;
525
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300526 /* This holds the amsdu headers length */
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300527 skb_info->driver_data[0] = (void *)(uintptr_t)0;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300528
Johannes Berg8ca151b2013-01-24 14:25:36 +0100529 /*
Ariej Marjieh7da91b02014-07-07 12:09:40 +0300530 * IWL_MVM_OFFCHANNEL_QUEUE is used for ROC packets that can be used
531 * in 2 different types of vifs, P2P & STATION. P2P uses the offchannel
532 * queue. STATION (HS2.0) uses the auxiliary context of the FW,
533 * and hence needs to be sent on the aux queue
534 */
535 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300536 info.control.vif->type == NL80211_IFTYPE_STATION)
Ariej Marjieh7da91b02014-07-07 12:09:40 +0300537 IEEE80211_SKB_CB(skb)->hw_queue = mvm->aux_queue;
538
Liad Kaufmande24f632015-08-04 15:19:18 +0300539 queue = info.hw_queue;
540
Ariej Marjieh7da91b02014-07-07 12:09:40 +0300541 /*
Ilan Peerd0ab08d2015-06-24 09:23:01 +0300542 * If the interface on which the frame is sent is the P2P_DEVICE
Johannes Berg8ca151b2013-01-24 14:25:36 +0100543 * or an AP/GO interface use the broadcast station associated
Ilan Peerd0ab08d2015-06-24 09:23:01 +0300544 * with it; otherwise if the interface is a managed interface
545 * use the AP station associated with it for multicast traffic
546 * (this is not possible for unicast packets as a TLDS discovery
547 * response are sent without a station entry); otherwise use the
548 * AUX station.
Johannes Berg8ca151b2013-01-24 14:25:36 +0100549 */
Ilan Peerd0ab08d2015-06-24 09:23:01 +0300550 sta_id = mvm->aux_sta.sta_id;
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300551 if (info.control.vif) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100552 struct iwl_mvm_vif *mvmvif =
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300553 iwl_mvm_vif_from_mac80211(info.control.vif);
Ilan Peerd0ab08d2015-06-24 09:23:01 +0300554
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300555 if (info.control.vif->type == NL80211_IFTYPE_P2P_DEVICE ||
Liad Kaufmande24f632015-08-04 15:19:18 +0300556 info.control.vif->type == NL80211_IFTYPE_AP) {
Ilan Peerd0ab08d2015-06-24 09:23:01 +0300557 sta_id = mvmvif->bcast_sta.sta_id;
Liad Kaufmande24f632015-08-04 15:19:18 +0300558 queue = iwl_mvm_get_ctrl_vif_queue(mvm, &info,
559 hdr->frame_control);
560 } else if (info.control.vif->type == NL80211_IFTYPE_STATION &&
561 is_multicast_ether_addr(hdr->addr1)) {
Ilan Peerd0ab08d2015-06-24 09:23:01 +0300562 u8 ap_sta_id = ACCESS_ONCE(mvmvif->ap_sta_id);
563
564 if (ap_sta_id != IWL_MVM_STATION_COUNT)
565 sta_id = ap_sta_id;
566 }
Johannes Berg8ca151b2013-01-24 14:25:36 +0100567 }
568
Liad Kaufmande24f632015-08-04 15:19:18 +0300569 IWL_DEBUG_TX(mvm, "station Id %d, queue=%d\n", sta_id, queue);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100570
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300571 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, &info, hdrlen, NULL, sta_id);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100572 if (!dev_cmd)
573 return -1;
574
Johannes Berg8ca151b2013-01-24 14:25:36 +0100575 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
576
577 /* Copy MAC header from skb into command buffer */
Johannes Bergca8c0f42015-04-20 17:54:54 +0200578 memcpy(tx_cmd->hdr, hdr, hdrlen);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100579
Liad Kaufmande24f632015-08-04 15:19:18 +0300580 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, queue)) {
Johannes Berg8ca151b2013-01-24 14:25:36 +0100581 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
582 return -1;
583 }
584
Liad Kaufmanfb896c42016-02-14 15:32:58 +0200585 /*
586 * Increase the pending frames counter, so that later when a reply comes
587 * in and the counter is decreased - we don't start getting negative
588 * values.
589 * Note that we don't need to make sure it isn't agg'd, since we're
590 * TXing non-sta
591 */
592 atomic_inc(&mvm->pending_frames[sta_id]);
593
Johannes Berg8ca151b2013-01-24 14:25:36 +0100594 return 0;
595}
596
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300597#ifdef CONFIG_INET
598static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300599 struct ieee80211_tx_info *info,
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300600 struct ieee80211_sta *sta,
601 struct sk_buff_head *mpdus_skb)
602{
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200603 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300604 struct ieee80211_hdr *hdr = (void *)skb->data;
605 unsigned int mss = skb_shinfo(skb)->gso_size;
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300606 struct sk_buff *tmp, *next;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300607 char cb[sizeof(skb->cb)];
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200608 unsigned int num_subframes, tcp_payload_len, subf_len, max_amsdu_len;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300609 bool ipv4 = (skb->protocol == htons(ETH_P_IP));
610 u16 ip_base_id = ipv4 ? ntohs(ip_hdr(skb)->id) : 0;
611 u16 amsdu_add, snap_ip_tcp, pad, i = 0;
Emmanuel Grumbach9e7dce22015-10-26 16:14:06 +0200612 unsigned int dbg_max_amsdu_len;
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200613 netdev_features_t netdev_features = NETIF_F_CSUM_MASK | NETIF_F_SG;
Emmanuel Grumbach50b02132015-11-11 11:37:02 +0200614 u8 *qc, tid, txf;
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300615
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300616 snap_ip_tcp = 8 + skb_transport_header(skb) - skb_network_header(skb) +
617 tcp_hdrlen(skb);
618
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200619 qc = ieee80211_get_qos_ctl(hdr);
620 tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
621 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
622 return -EINVAL;
623
Emmanuel Grumbachfa820d62016-04-03 10:15:59 +0300624 dbg_max_amsdu_len = ACCESS_ONCE(mvm->max_amsdu_len);
625
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300626 if (!sta->max_amsdu_len ||
Emmanuel Grumbach04e3a5d2015-10-28 09:47:41 +0200627 !ieee80211_is_data_qos(hdr->frame_control) ||
Emmanuel Grumbachfa820d62016-04-03 10:15:59 +0300628 (!mvmsta->tlc_amsdu && !dbg_max_amsdu_len)) {
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300629 num_subframes = 1;
630 pad = 0;
631 goto segment;
632 }
633
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200634 /*
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200635 * Do not build AMSDU for IPv6 with extension headers.
636 * ask stack to segment and checkum the generated MPDUs for us.
637 */
638 if (skb->protocol == htons(ETH_P_IPV6) &&
639 ((struct ipv6hdr *)skb_network_header(skb))->nexthdr !=
640 IPPROTO_TCP) {
641 num_subframes = 1;
642 pad = 0;
643 netdev_features &= ~NETIF_F_CSUM_MASK;
644 goto segment;
645 }
646
647 /*
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200648 * No need to lock amsdu_in_ampdu_allowed since it can't be modified
649 * during an BA session.
650 */
651 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
652 !mvmsta->tid_data[tid].amsdu_in_ampdu_allowed) {
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300653 num_subframes = 1;
654 pad = 0;
655 goto segment;
656 }
657
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200658 max_amsdu_len = sta->max_amsdu_len;
Emmanuel Grumbach50b02132015-11-11 11:37:02 +0200659
660 /* the Tx FIFO to which this A-MSDU will be routed */
661 txf = iwl_mvm_ac_to_tx_fifo[tid_to_mac80211_ac[tid]];
662
663 /*
664 * Don't send an AMSDU that will be longer than the TXF.
665 * Add a security margin of 256 for the TX command + headers.
666 * We also want to have the start of the next packet inside the
667 * fifo to be able to send bursts.
668 */
669 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
670 mvm->shared_mem_cfg.txfifo_size[txf] - 256);
671
Emmanuel Grumbachfa820d62016-04-03 10:15:59 +0300672 if (unlikely(dbg_max_amsdu_len))
Emmanuel Grumbach9e7dce22015-10-26 16:14:06 +0200673 max_amsdu_len = min_t(unsigned int, max_amsdu_len,
674 dbg_max_amsdu_len);
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200675
676 /*
677 * Limit A-MSDU in A-MPDU to 4095 bytes when VHT is not
678 * supported. This is a spec requirement (IEEE 802.11-2015
679 * section 8.7.3 NOTE 3).
680 */
681 if (info->flags & IEEE80211_TX_CTL_AMPDU &&
682 !sta->vht_cap.vht_supported)
683 max_amsdu_len = min_t(unsigned int, max_amsdu_len, 4095);
684
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300685 /* Sub frame header + SNAP + IP header + TCP header + MSS */
686 subf_len = sizeof(struct ethhdr) + snap_ip_tcp + mss;
687 pad = (4 - subf_len) & 0x3;
688
689 /*
690 * If we have N subframes in the A-MSDU, then the A-MSDU's size is
691 * N * subf_len + (N - 1) * pad.
692 */
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200693 num_subframes = (max_amsdu_len + pad) / (subf_len + pad);
694 if (num_subframes > 1)
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300695 *qc |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300696
697 tcp_payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
698 tcp_hdrlen(skb) + skb->data_len;
699
700 /*
701 * Make sure we have enough TBs for the A-MSDU:
702 * 2 for each subframe
703 * 1 more for each fragment
704 * 1 more for the potential data in the header
705 */
706 num_subframes =
707 min_t(unsigned int, num_subframes,
708 (mvm->trans->max_skb_frags - 1 -
709 skb_shinfo(skb)->nr_frags) / 2);
710
711 /* This skb fits in one single A-MSDU */
712 if (num_subframes * mss >= tcp_payload_len) {
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300713 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
714
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300715 /*
716 * Compute the length of all the data added for the A-MSDU.
717 * This will be used to compute the length to write in the TX
718 * command. We have: SNAP + IP + TCP for n -1 subframes and
719 * ETH header for n subframes. Note that the original skb
720 * already had one set of SNAP / IP / TCP headers.
721 */
722 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300723 amsdu_add = num_subframes * sizeof(struct ethhdr) +
724 (num_subframes - 1) * (snap_ip_tcp + pad);
725 /* This holds the amsdu headers length */
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300726 skb_info->driver_data[0] = (void *)(uintptr_t)amsdu_add;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300727
728 __skb_queue_tail(mpdus_skb, skb);
729 return 0;
730 }
731
732 /*
733 * Trick the segmentation function to make it
734 * create SKBs that can fit into one A-MSDU.
735 */
736segment:
737 skb_shinfo(skb)->gso_size = num_subframes * mss;
738 memcpy(cb, skb->cb, sizeof(cb));
739
Sara Sharon5e6a98d2016-03-10 17:40:56 +0200740 next = skb_gso_segment(skb, netdev_features);
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300741 skb_shinfo(skb)->gso_size = mss;
742 if (WARN_ON_ONCE(IS_ERR(next)))
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300743 return -EINVAL;
744 else if (next)
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300745 consume_skb(skb);
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300746
747 while (next) {
748 tmp = next;
749 next = tmp->next;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300750
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300751 memcpy(tmp->cb, cb, sizeof(tmp->cb));
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300752 /*
753 * Compute the length of all the data added for the A-MSDU.
754 * This will be used to compute the length to write in the TX
755 * command. We have: SNAP + IP + TCP for n -1 subframes and
756 * ETH header for n subframes.
757 */
758 tcp_payload_len = skb_tail_pointer(tmp) -
759 skb_transport_header(tmp) -
760 tcp_hdrlen(tmp) + tmp->data_len;
761
762 if (ipv4)
763 ip_hdr(tmp)->id = htons(ip_base_id + i * num_subframes);
764
765 if (tcp_payload_len > mss) {
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300766 struct ieee80211_tx_info *skb_info =
767 IEEE80211_SKB_CB(tmp);
768
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300769 num_subframes = DIV_ROUND_UP(tcp_payload_len, mss);
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300770 amsdu_add = num_subframes * sizeof(struct ethhdr) +
771 (num_subframes - 1) * (snap_ip_tcp + pad);
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300772 skb_info->driver_data[0] =
773 (void *)(uintptr_t)amsdu_add;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300774 skb_shinfo(tmp)->gso_size = mss;
775 } else {
Emmanuel Grumbachbb81bb62015-10-26 16:00:29 +0200776 qc = ieee80211_get_qos_ctl((void *)tmp->data);
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300777
778 if (ipv4)
779 ip_send_check(ip_hdr(tmp));
780 *qc &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
781 skb_shinfo(tmp)->gso_size = 0;
782 }
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300783
784 tmp->prev = NULL;
785 tmp->next = NULL;
786
787 __skb_queue_tail(mpdus_skb, tmp);
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300788 i++;
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300789 }
790
791 return 0;
792}
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300793#else /* CONFIG_INET */
794static int iwl_mvm_tx_tso(struct iwl_mvm *mvm, struct sk_buff *skb,
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300795 struct ieee80211_tx_info *info,
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300796 struct ieee80211_sta *sta,
797 struct sk_buff_head *mpdus_skb)
798{
799 /* Impossible to get TSO with CONFIG_INET */
800 WARN_ON(1);
801
802 return -1;
803}
804#endif
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300805
Liad Kaufman24afba72015-07-28 18:56:08 +0300806static void iwl_mvm_tx_add_stream(struct iwl_mvm *mvm,
807 struct iwl_mvm_sta *mvm_sta, u8 tid,
808 struct sk_buff *skb)
809{
810 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
811 u8 mac_queue = info->hw_queue;
812 struct sk_buff_head *deferred_tx_frames;
813
814 lockdep_assert_held(&mvm_sta->lock);
815
816 mvm_sta->deferred_traffic_tid_map |= BIT(tid);
817 set_bit(mvm_sta->sta_id, mvm->sta_deferred_frames);
818
819 deferred_tx_frames = &mvm_sta->tid_data[tid].deferred_tx_frames;
820
821 skb_queue_tail(deferred_tx_frames, skb);
822
823 /*
824 * The first deferred frame should've stopped the MAC queues, so we
825 * should never get a second deferred frame for the RA/TID.
826 */
827 if (!WARN(skb_queue_len(deferred_tx_frames) != 1,
828 "RATID %d/%d has %d deferred frames\n", mvm_sta->sta_id, tid,
829 skb_queue_len(deferred_tx_frames))) {
830 iwl_mvm_stop_mac_queues(mvm, BIT(mac_queue));
831 schedule_work(&mvm->add_stream_wk);
832 }
833}
834
Johannes Berg8ca151b2013-01-24 14:25:36 +0100835/*
836 * Sets the fields in the Tx cmd that are crypto related
837 */
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300838static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb,
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300839 struct ieee80211_tx_info *info,
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300840 struct ieee80211_sta *sta)
Johannes Berg8ca151b2013-01-24 14:25:36 +0100841{
842 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100843 struct iwl_mvm_sta *mvmsta;
844 struct iwl_device_cmd *dev_cmd;
845 struct iwl_tx_cmd *tx_cmd;
846 __le16 fc;
847 u16 seq_number = 0;
848 u8 tid = IWL_MAX_TID_COUNT;
849 u8 txq_id = info->hw_queue;
Johannes Berg7ec54712016-03-16 09:29:48 +0100850 bool is_ampdu = false;
Johannes Bergca8c0f42015-04-20 17:54:54 +0200851 int hdrlen;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100852
Johannes Berg5b577a92013-11-14 18:20:04 +0100853 mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100854 fc = hdr->frame_control;
Johannes Bergca8c0f42015-04-20 17:54:54 +0200855 hdrlen = ieee80211_hdrlen(fc);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100856
857 if (WARN_ON_ONCE(!mvmsta))
858 return -1;
859
Emmanuel Grumbach881acd82013-03-19 16:16:00 +0200860 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
Johannes Berg8ca151b2013-01-24 14:25:36 +0100861 return -1;
862
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300863 dev_cmd = iwl_mvm_set_tx_params(mvm, skb, info, hdrlen,
864 sta, mvmsta->sta_id);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100865 if (!dev_cmd)
866 goto drop;
867
868 tx_cmd = (struct iwl_tx_cmd *)dev_cmd->payload;
869 /* From now on, we cannot access info->control */
870
Johannes Berg3e56ead2013-02-15 22:23:18 +0100871 /*
872 * we handle that entirely ourselves -- for uAPSD the firmware
873 * will always send a notification, and for PS-Poll responses
874 * we'll notify mac80211 when getting frame status
875 */
876 info->flags &= ~IEEE80211_TX_STATUS_EOSP;
877
Johannes Berg8ca151b2013-01-24 14:25:36 +0100878 spin_lock(&mvmsta->lock);
879
880 if (ieee80211_is_data_qos(fc) && !ieee80211_is_qos_nullfunc(fc)) {
881 u8 *qc = NULL;
882 qc = ieee80211_get_qos_ctl(hdr);
883 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
884 if (WARN_ON_ONCE(tid >= IWL_MAX_TID_COUNT))
885 goto drop_unlock_sta;
886
887 seq_number = mvmsta->tid_data[tid].seq_number;
888 seq_number &= IEEE80211_SCTL_SEQ;
889 hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
890 hdr->seq_ctrl |= cpu_to_le16(seq_number);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100891 is_ampdu = info->flags & IEEE80211_TX_CTL_AMPDU;
Liad Kaufman24afba72015-07-28 18:56:08 +0300892 } else if (iwl_mvm_is_dqa_supported(mvm) &&
893 (ieee80211_is_qos_nullfunc(fc) ||
894 ieee80211_is_nullfunc(fc))) {
895 /*
896 * nullfunc frames should go to the MGMT queue regardless of QOS
897 */
898 tid = IWL_MAX_TID_COUNT;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100899 }
900
Liad Kaufman9794c642015-08-19 17:34:28 +0300901 if (iwl_mvm_is_dqa_supported(mvm))
902 txq_id = mvmsta->tid_data[tid].txq_id;
903
Johannes Berg8ca151b2013-01-24 14:25:36 +0100904 /* Copy MAC header from skb into command buffer */
Johannes Bergca8c0f42015-04-20 17:54:54 +0200905 memcpy(tx_cmd->hdr, hdr, hdrlen);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100906
907 WARN_ON_ONCE(info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM);
908
Arik Nemtsova0f6bf22014-09-21 19:10:04 +0300909 if (sta->tdls) {
910 /* default to TID 0 for non-QoS packets */
911 u8 tdls_tid = tid == IWL_MAX_TID_COUNT ? 0 : tid;
912
913 txq_id = mvmsta->hw_queue[tid_to_mac80211_ac[tdls_tid]];
914 }
915
Johannes Berg8ca151b2013-01-24 14:25:36 +0100916 if (is_ampdu) {
917 if (WARN_ON_ONCE(mvmsta->tid_data[tid].state != IWL_AGG_ON))
918 goto drop_unlock_sta;
919 txq_id = mvmsta->tid_data[tid].txq_id;
920 }
921
Liad Kaufman9794c642015-08-19 17:34:28 +0300922 /* Check if TXQ needs to be allocated or re-activated */
923 if (unlikely(txq_id == IEEE80211_INVAL_HW_QUEUE ||
924 !mvmsta->tid_data[tid].is_tid_active) &&
925 iwl_mvm_is_dqa_supported(mvm)) {
926 /* If TXQ needs to be allocated... */
927 if (txq_id == IEEE80211_INVAL_HW_QUEUE) {
Liad Kaufman24afba72015-07-28 18:56:08 +0300928 iwl_mvm_tx_add_stream(mvm, mvmsta, tid, skb);
929
930 /*
931 * The frame is now deferred, and the worker scheduled
932 * will re-allocate it, so we can free it for now.
933 */
934 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
935 spin_unlock(&mvmsta->lock);
936 return 0;
Liad Kaufman9794c642015-08-19 17:34:28 +0300937
Liad Kaufman24afba72015-07-28 18:56:08 +0300938 }
939
Liad Kaufman9794c642015-08-19 17:34:28 +0300940 /* If we are here - TXQ exists and needs to be re-activated */
941 spin_lock(&mvm->queue_info_lock);
942 mvm->queue_info[txq_id].status = IWL_MVM_QUEUE_READY;
943 mvmsta->tid_data[tid].is_tid_active = true;
944 spin_unlock(&mvm->queue_info_lock);
945
946 IWL_DEBUG_TX_QUEUES(mvm, "Re-activating queue %d for TX\n",
947 txq_id);
Liad Kaufman24afba72015-07-28 18:56:08 +0300948 }
949
Liad Kaufman9794c642015-08-19 17:34:28 +0300950 /* Keep track of the time of the last frame for this RA/TID */
951 mvm->queue_info[txq_id].last_frame_time[tid] = jiffies;
952
Johannes Berg8ca151b2013-01-24 14:25:36 +0100953 IWL_DEBUG_TX(mvm, "TX to [%d|%d] Q:%d - seq: 0x%x\n", mvmsta->sta_id,
Eliad Pellercf9d1182013-12-31 18:54:06 +0200954 tid, txq_id, IEEE80211_SEQ_TO_SN(seq_number));
Johannes Berg8ca151b2013-01-24 14:25:36 +0100955
Johannes Berg8ca151b2013-01-24 14:25:36 +0100956 if (iwl_trans_tx(mvm->trans, skb, dev_cmd, txq_id))
957 goto drop_unlock_sta;
958
Johannes Berg7ec54712016-03-16 09:29:48 +0100959 if (tid < IWL_MAX_TID_COUNT && !ieee80211_has_morefrags(fc))
Eliad Pellercf9d1182013-12-31 18:54:06 +0200960 mvmsta->tid_data[tid].seq_number = seq_number + 0x10;
Johannes Berg8ca151b2013-01-24 14:25:36 +0100961
962 spin_unlock(&mvmsta->lock);
963
Liad Kaufmancf961e12015-08-13 19:16:08 +0300964 /* Increase pending frames count if this isn't AMPDU */
965 if (!is_ampdu)
Emmanuel Grumbache3d4bc82013-05-07 14:08:24 +0300966 atomic_inc(&mvm->pending_frames[mvmsta->sta_id]);
Johannes Berg8ca151b2013-01-24 14:25:36 +0100967
968 return 0;
969
970drop_unlock_sta:
971 iwl_trans_free_tx_cmd(mvm->trans, dev_cmd);
972 spin_unlock(&mvmsta->lock);
973drop:
974 return -1;
975}
976
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300977int iwl_mvm_tx_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
978 struct ieee80211_sta *sta)
979{
980 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300981 struct ieee80211_tx_info *skb_info = IEEE80211_SKB_CB(skb);
982 struct ieee80211_tx_info info;
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300983 struct sk_buff_head mpdus_skbs;
984 unsigned int payload_len;
985 int ret;
986
987 if (WARN_ON_ONCE(!mvmsta))
988 return -1;
989
990 if (WARN_ON_ONCE(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
991 return -1;
992
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300993 memcpy(&info, skb->cb, sizeof(info));
994
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300995 /* This holds the amsdu headers length */
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300996 skb_info->driver_data[0] = (void *)(uintptr_t)0;
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +0300997
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +0300998 if (!skb_is_gso(skb))
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +0300999 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +03001000
1001 payload_len = skb_tail_pointer(skb) - skb_transport_header(skb) -
1002 tcp_hdrlen(skb) + skb->data_len;
1003
1004 if (payload_len <= skb_shinfo(skb)->gso_size)
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +03001005 return iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +03001006
1007 __skb_queue_head_init(&mpdus_skbs);
1008
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +03001009 ret = iwl_mvm_tx_tso(mvm, skb, &info, sta, &mpdus_skbs);
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +03001010 if (ret)
1011 return ret;
1012
1013 if (WARN_ON(skb_queue_empty(&mpdus_skbs)))
1014 return ret;
1015
1016 while (!skb_queue_empty(&mpdus_skbs)) {
Emmanuel Grumbacha6d5e322015-10-14 16:28:52 +03001017 skb = __skb_dequeue(&mpdus_skbs);
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +03001018
Emmanuel Grumbach5c08b0f2016-05-03 12:08:43 +03001019 ret = iwl_mvm_tx_mpdu(mvm, skb, &info, sta);
Emmanuel Grumbacha3713f82015-10-14 14:16:35 +03001020 if (ret) {
1021 __skb_queue_purge(&mpdus_skbs);
1022 return ret;
1023 }
1024 }
1025
1026 return 0;
1027}
1028
Johannes Berg8ca151b2013-01-24 14:25:36 +01001029static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm,
1030 struct ieee80211_sta *sta, u8 tid)
1031{
Johannes Berg5b577a92013-11-14 18:20:04 +01001032 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001033 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
1034 struct ieee80211_vif *vif = mvmsta->vif;
1035
1036 lockdep_assert_held(&mvmsta->lock);
1037
Johannes Berg3e56ead2013-02-15 22:23:18 +01001038 if ((tid_data->state == IWL_AGG_ON ||
1039 tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) &&
1040 iwl_mvm_tid_queued(tid_data) == 0) {
1041 /*
1042 * Now that this aggregation queue is empty tell mac80211 so it
1043 * knows we no longer have frames buffered for the station on
1044 * this TID (for the TIM bitmap calculation.)
1045 */
1046 ieee80211_sta_set_buffered(sta, tid, false);
1047 }
1048
Johannes Berg8ca151b2013-01-24 14:25:36 +01001049 if (tid_data->ssn != tid_data->next_reclaimed)
1050 return;
1051
1052 switch (tid_data->state) {
1053 case IWL_EMPTYING_HW_QUEUE_ADDBA:
1054 IWL_DEBUG_TX_QUEUES(mvm,
1055 "Can continue addBA flow ssn = next_recl = %d\n",
1056 tid_data->next_reclaimed);
1057 tid_data->state = IWL_AGG_STARTING;
1058 ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1059 break;
1060
1061 case IWL_EMPTYING_HW_QUEUE_DELBA:
1062 IWL_DEBUG_TX_QUEUES(mvm,
1063 "Can continue DELBA flow ssn = next_recl = %d\n",
1064 tid_data->next_reclaimed);
Liad Kaufman4ecafae2015-07-14 13:36:18 +03001065 iwl_mvm_disable_txq(mvm, tid_data->txq_id,
1066 vif->hw_queue[tid_to_mac80211_ac[tid]], tid,
1067 CMD_ASYNC);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001068 tid_data->state = IWL_AGG_OFF;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001069 ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1070 break;
1071
1072 default:
1073 break;
1074 }
1075}
1076
1077#ifdef CONFIG_IWLWIFI_DEBUG
1078const char *iwl_mvm_get_tx_fail_reason(u32 status)
1079{
1080#define TX_STATUS_FAIL(x) case TX_STATUS_FAIL_ ## x: return #x
1081#define TX_STATUS_POSTPONE(x) case TX_STATUS_POSTPONE_ ## x: return #x
1082
1083 switch (status & TX_STATUS_MSK) {
1084 case TX_STATUS_SUCCESS:
1085 return "SUCCESS";
1086 TX_STATUS_POSTPONE(DELAY);
1087 TX_STATUS_POSTPONE(FEW_BYTES);
1088 TX_STATUS_POSTPONE(BT_PRIO);
1089 TX_STATUS_POSTPONE(QUIET_PERIOD);
1090 TX_STATUS_POSTPONE(CALC_TTAK);
1091 TX_STATUS_FAIL(INTERNAL_CROSSED_RETRY);
1092 TX_STATUS_FAIL(SHORT_LIMIT);
1093 TX_STATUS_FAIL(LONG_LIMIT);
1094 TX_STATUS_FAIL(UNDERRUN);
1095 TX_STATUS_FAIL(DRAIN_FLOW);
1096 TX_STATUS_FAIL(RFKILL_FLUSH);
1097 TX_STATUS_FAIL(LIFE_EXPIRE);
1098 TX_STATUS_FAIL(DEST_PS);
1099 TX_STATUS_FAIL(HOST_ABORTED);
1100 TX_STATUS_FAIL(BT_RETRY);
1101 TX_STATUS_FAIL(STA_INVALID);
1102 TX_STATUS_FAIL(FRAG_DROPPED);
1103 TX_STATUS_FAIL(TID_DISABLE);
1104 TX_STATUS_FAIL(FIFO_FLUSHED);
1105 TX_STATUS_FAIL(SMALL_CF_POLL);
1106 TX_STATUS_FAIL(FW_DROP);
1107 TX_STATUS_FAIL(STA_COLOR_MISMATCH);
1108 }
1109
1110 return "UNKNOWN";
1111
1112#undef TX_STATUS_FAIL
1113#undef TX_STATUS_POSTPONE
1114}
1115#endif /* CONFIG_IWLWIFI_DEBUG */
1116
Eyal Shapirad310e402013-08-11 18:43:47 +03001117void iwl_mvm_hwrate_to_tx_rate(u32 rate_n_flags,
Johannes Berg57fbcce2016-04-12 15:56:15 +02001118 enum nl80211_band band,
Eyal Shapirad310e402013-08-11 18:43:47 +03001119 struct ieee80211_tx_rate *r)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001120{
Johannes Berg8ca151b2013-01-24 14:25:36 +01001121 if (rate_n_flags & RATE_HT_MCS_GF_MSK)
1122 r->flags |= IEEE80211_TX_RC_GREEN_FIELD;
1123 switch (rate_n_flags & RATE_MCS_CHAN_WIDTH_MSK) {
1124 case RATE_MCS_CHAN_WIDTH_20:
1125 break;
1126 case RATE_MCS_CHAN_WIDTH_40:
1127 r->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
1128 break;
1129 case RATE_MCS_CHAN_WIDTH_80:
1130 r->flags |= IEEE80211_TX_RC_80_MHZ_WIDTH;
1131 break;
1132 case RATE_MCS_CHAN_WIDTH_160:
1133 r->flags |= IEEE80211_TX_RC_160_MHZ_WIDTH;
1134 break;
1135 }
1136 if (rate_n_flags & RATE_MCS_SGI_MSK)
1137 r->flags |= IEEE80211_TX_RC_SHORT_GI;
1138 if (rate_n_flags & RATE_MCS_HT_MSK) {
1139 r->flags |= IEEE80211_TX_RC_MCS;
1140 r->idx = rate_n_flags & RATE_HT_MCS_INDEX_MSK;
1141 } else if (rate_n_flags & RATE_MCS_VHT_MSK) {
1142 ieee80211_rate_set_vht(
1143 r, rate_n_flags & RATE_VHT_MCS_RATE_CODE_MSK,
1144 ((rate_n_flags & RATE_VHT_MCS_NSS_MSK) >>
1145 RATE_VHT_MCS_NSS_POS) + 1);
1146 r->flags |= IEEE80211_TX_RC_VHT_MCS;
1147 } else {
1148 r->idx = iwl_mvm_legacy_rate_to_mac80211_idx(rate_n_flags,
Eyal Shapirad310e402013-08-11 18:43:47 +03001149 band);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001150 }
1151}
1152
Eyal Shapirad310e402013-08-11 18:43:47 +03001153/**
1154 * translate ucode response to mac80211 tx status control values
1155 */
1156static void iwl_mvm_hwrate_to_tx_status(u32 rate_n_flags,
1157 struct ieee80211_tx_info *info)
1158{
1159 struct ieee80211_tx_rate *r = &info->status.rates[0];
1160
1161 info->status.antenna =
1162 ((rate_n_flags & RATE_MCS_ANT_ABC_MSK) >> RATE_MCS_ANT_POS);
1163 iwl_mvm_hwrate_to_tx_rate(rate_n_flags, info->band, r);
1164}
1165
Golan Ben-Ami25657fe2015-09-02 12:34:23 +03001166static void iwl_mvm_tx_status_check_trigger(struct iwl_mvm *mvm,
1167 u32 status)
1168{
1169 struct iwl_fw_dbg_trigger_tlv *trig;
1170 struct iwl_fw_dbg_trigger_tx_status *status_trig;
1171 int i;
1172
1173 if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TX_STATUS))
1174 return;
1175
1176 trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TX_STATUS);
1177 status_trig = (void *)trig->data;
1178
1179 if (!iwl_fw_dbg_trigger_check_stop(mvm, NULL, trig))
1180 return;
1181
1182 for (i = 0; i < ARRAY_SIZE(status_trig->statuses); i++) {
1183 /* don't collect on status 0 */
1184 if (!status_trig->statuses[i].status)
1185 break;
1186
1187 if (status_trig->statuses[i].status != (status & TX_STATUS_MSK))
1188 continue;
1189
1190 iwl_mvm_fw_dbg_collect_trig(mvm, trig,
1191 "Tx status %d was received",
1192 status & TX_STATUS_MSK);
1193 break;
1194 }
1195}
1196
Johannes Berg8ca151b2013-01-24 14:25:36 +01001197static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm,
1198 struct iwl_rx_packet *pkt)
1199{
1200 struct ieee80211_sta *sta;
1201 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1202 int txq_id = SEQ_TO_QUEUE(sequence);
1203 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1204 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1205 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1206 u32 status = le16_to_cpu(tx_resp->status.status);
1207 u16 ssn = iwl_mvm_get_scd_ssn(tx_resp);
1208 struct iwl_mvm_sta *mvmsta;
1209 struct sk_buff_head skbs;
1210 u8 skb_freed = 0;
1211 u16 next_reclaimed, seq_ctl;
Emmanuel Grumbach532beba2016-03-07 22:23:52 +02001212 bool is_ndp = false;
Liad Kaufmancf961e12015-08-13 19:16:08 +03001213 bool txq_agg = false; /* Is this TXQ aggregated */
Johannes Berg8ca151b2013-01-24 14:25:36 +01001214
1215 __skb_queue_head_init(&skbs);
1216
1217 seq_ctl = le16_to_cpu(tx_resp->seq_ctl);
1218
1219 /* we can free until ssn % q.n_bd not inclusive */
1220 iwl_trans_reclaim(mvm->trans, txq_id, ssn, &skbs);
1221
1222 while (!skb_queue_empty(&skbs)) {
1223 struct sk_buff *skb = __skb_dequeue(&skbs);
1224 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1225
1226 skb_freed++;
1227
1228 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1229
1230 memset(&info->status, 0, sizeof(info->status));
1231
1232 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1233
1234 /* inform mac80211 about what happened with the frame */
1235 switch (status & TX_STATUS_MSK) {
1236 case TX_STATUS_SUCCESS:
1237 case TX_STATUS_DIRECT_DONE:
1238 info->flags |= IEEE80211_TX_STAT_ACK;
1239 break;
1240 case TX_STATUS_FAIL_DEST_PS:
1241 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1242 break;
1243 default:
1244 break;
1245 }
1246
Golan Ben-Ami25657fe2015-09-02 12:34:23 +03001247 iwl_mvm_tx_status_check_trigger(mvm, status);
1248
Johannes Berg8ca151b2013-01-24 14:25:36 +01001249 info->status.rates[0].count = tx_resp->failure_frame + 1;
Eyal Shapirad310e402013-08-11 18:43:47 +03001250 iwl_mvm_hwrate_to_tx_status(le32_to_cpu(tx_resp->initial_rate),
1251 info);
Eyal Shapira929e6ed2015-01-30 13:40:02 +02001252 info->status.status_driver_data[1] =
1253 (void *)(uintptr_t)le32_to_cpu(tx_resp->initial_rate);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001254
1255 /* Single frame failure in an AMPDU queue => send BAR */
Eytan Lifshitz19e737c2013-09-09 13:30:15 +02001256 if (txq_id >= mvm->first_agg_queue &&
Eyal Shapira9ce578a2014-12-31 15:22:38 +02001257 !(info->flags & IEEE80211_TX_STAT_ACK) &&
1258 !(info->flags & IEEE80211_TX_STAT_TX_FILTERED))
Johannes Berg8ca151b2013-01-24 14:25:36 +01001259 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001260
Emmanuel Grumbachebea2f32013-06-13 10:07:47 +03001261 /* W/A FW bug: seq_ctl is wrong when the status isn't success */
1262 if (status != TX_STATUS_SUCCESS) {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001263 struct ieee80211_hdr *hdr = (void *)skb->data;
1264 seq_ctl = le16_to_cpu(hdr->seq_ctrl);
1265 }
1266
Emmanuel Grumbach532beba2016-03-07 22:23:52 +02001267 if (unlikely(!seq_ctl)) {
1268 struct ieee80211_hdr *hdr = (void *)skb->data;
1269
1270 /*
1271 * If it is an NDP, we can't update next_reclaim since
1272 * its sequence control is 0. Note that for that same
1273 * reason, NDPs are never sent to A-MPDU'able queues
1274 * so that we can never have more than one freed frame
1275 * for a single Tx resonse (see WARN_ON below).
1276 */
1277 if (ieee80211_is_qos_nullfunc(hdr->frame_control))
1278 is_ndp = true;
1279 }
1280
Emmanuel Grumbach9b5452f2014-10-07 10:38:53 +03001281 /*
1282 * TODO: this is not accurate if we are freeing more than one
1283 * packet.
1284 */
1285 info->status.tx_time =
1286 le16_to_cpu(tx_resp->wireless_media_time);
Eliad Peller3a84b692014-03-12 15:05:06 +02001287 BUILD_BUG_ON(ARRAY_SIZE(info->status.status_driver_data) < 1);
1288 info->status.status_driver_data[0] =
1289 (void *)(uintptr_t)tx_resp->reduced_tpc;
1290
Johannes Bergf14d6b32014-03-21 13:30:03 +01001291 ieee80211_tx_status(mvm->hw, skb);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001292 }
1293
Eytan Lifshitz19e737c2013-09-09 13:30:15 +02001294 if (txq_id >= mvm->first_agg_queue) {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001295 /* If this is an aggregation queue, we use the ssn since:
1296 * ssn = wifi seq_num % 256.
1297 * The seq_ctl is the sequence control of the packet to which
1298 * this Tx response relates. But if there is a hole in the
1299 * bitmap of the BA we received, this Tx response may allow to
1300 * reclaim the hole and all the subsequent packets that were
1301 * already acked. In that case, seq_ctl != ssn, and the next
1302 * packet to be reclaimed will be ssn and not seq_ctl. In that
1303 * case, several packets will be reclaimed even if
1304 * frame_count = 1.
1305 *
1306 * The ssn is the index (% 256) of the latest packet that has
1307 * treated (acked / dropped) + 1.
1308 */
1309 next_reclaimed = ssn;
1310 } else {
1311 /* The next packet to be reclaimed is the one after this one */
Johannes Berg9a886582013-02-15 19:25:00 +01001312 next_reclaimed = IEEE80211_SEQ_TO_SN(seq_ctl + 0x10);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001313 }
1314
1315 IWL_DEBUG_TX_REPLY(mvm,
Emmanuel Grumbach8c6e83d2013-03-20 17:12:46 +02001316 "TXQ %d status %s (0x%08x)\n",
1317 txq_id, iwl_mvm_get_tx_fail_reason(status), status);
1318
1319 IWL_DEBUG_TX_REPLY(mvm,
1320 "\t\t\t\tinitial_rate 0x%x retries %d, idx=%d ssn=%d next_reclaimed=0x%x seq_ctl=0x%x\n",
1321 le32_to_cpu(tx_resp->initial_rate),
Johannes Berg8ca151b2013-01-24 14:25:36 +01001322 tx_resp->failure_frame, SEQ_TO_INDEX(sequence),
1323 ssn, next_reclaimed, seq_ctl);
1324
1325 rcu_read_lock();
1326
1327 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001328 /*
1329 * sta can't be NULL otherwise it'd mean that the sta has been freed in
1330 * the firmware while we still have packets for it in the Tx queues.
1331 */
1332 if (WARN_ON_ONCE(!sta))
1333 goto out;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001334
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001335 if (!IS_ERR(sta)) {
Johannes Berg5b577a92013-11-14 18:20:04 +01001336 mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001337
1338 if (tid != IWL_TID_NON_QOS) {
1339 struct iwl_mvm_tid_data *tid_data =
1340 &mvmsta->tid_data[tid];
Emmanuel Grumbach36be0eb2015-11-05 10:32:31 +02001341 bool send_eosp_ndp = false;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001342
Johannes Berg2bfb5092012-12-27 21:43:48 +01001343 spin_lock_bh(&mvmsta->lock);
Oren Givon2c4a2472016-05-29 14:05:50 +03001344 if (iwl_mvm_is_dqa_supported(mvm)) {
1345 enum iwl_mvm_agg_state state;
1346
1347 state = mvmsta->tid_data[tid].state;
1348 txq_agg = (state == IWL_AGG_ON ||
1349 state == IWL_EMPTYING_HW_QUEUE_DELBA);
1350 } else {
1351 txq_agg = txq_id >= mvm->first_agg_queue;
1352 }
Liad Kaufmancf961e12015-08-13 19:16:08 +03001353
Emmanuel Grumbach532beba2016-03-07 22:23:52 +02001354 if (!is_ndp) {
1355 tid_data->next_reclaimed = next_reclaimed;
1356 IWL_DEBUG_TX_REPLY(mvm,
1357 "Next reclaimed packet:%d\n",
1358 next_reclaimed);
1359 } else {
1360 IWL_DEBUG_TX_REPLY(mvm,
1361 "NDP - don't update next_reclaimed\n");
1362 }
1363
Johannes Berg8ca151b2013-01-24 14:25:36 +01001364 iwl_mvm_check_ratid_empty(mvm, sta, tid);
Emmanuel Grumbach36be0eb2015-11-05 10:32:31 +02001365
1366 if (mvmsta->sleep_tx_count) {
1367 mvmsta->sleep_tx_count--;
1368 if (mvmsta->sleep_tx_count &&
1369 !iwl_mvm_tid_queued(tid_data)) {
1370 /*
1371 * The number of frames in the queue
1372 * dropped to 0 even if we sent less
1373 * frames than we thought we had on the
1374 * Tx queue.
1375 * This means we had holes in the BA
1376 * window that we just filled, ask
1377 * mac80211 to send EOSP since the
1378 * firmware won't know how to do that.
1379 * Send NDP and the firmware will send
1380 * EOSP notification that will trigger
1381 * a call to ieee80211_sta_eosp().
1382 */
1383 send_eosp_ndp = true;
1384 }
1385 }
1386
Johannes Berg2bfb5092012-12-27 21:43:48 +01001387 spin_unlock_bh(&mvmsta->lock);
Emmanuel Grumbach36be0eb2015-11-05 10:32:31 +02001388 if (send_eosp_ndp) {
1389 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta,
1390 IEEE80211_FRAME_RELEASE_UAPSD,
1391 1, tid, false, false);
1392 mvmsta->sleep_tx_count = 0;
1393 ieee80211_send_eosp_nullfunc(sta, tid);
1394 }
Johannes Berg8ca151b2013-01-24 14:25:36 +01001395 }
Johannes Berg3e56ead2013-02-15 22:23:18 +01001396
1397 if (mvmsta->next_status_eosp) {
1398 mvmsta->next_status_eosp = false;
1399 ieee80211_sta_eosp(sta);
1400 }
Johannes Berg8ca151b2013-01-24 14:25:36 +01001401 } else {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001402 mvmsta = NULL;
1403 }
1404
1405 /*
1406 * If the txq is not an AMPDU queue, there is no chance we freed
1407 * several skbs. Check that out...
Johannes Berg8ca151b2013-01-24 14:25:36 +01001408 */
Liad Kaufmancf961e12015-08-13 19:16:08 +03001409 if (txq_agg)
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001410 goto out;
1411
1412 /* We can't free more than one frame at once on a shared queue */
Liad Kaufmancf961e12015-08-13 19:16:08 +03001413 WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1));
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001414
Emmanuel Grumbach589a6ba2014-06-05 11:32:41 +03001415 /* If we have still frames for this STA nothing to do here */
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001416 if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id]))
1417 goto out;
1418
1419 if (mvmsta && mvmsta->vif->type == NL80211_IFTYPE_AP) {
Andrei Otcheretianski003e52362014-05-25 17:24:22 +03001420
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001421 /*
Andrei Otcheretianski003e52362014-05-25 17:24:22 +03001422 * If there are no pending frames for this STA and
1423 * the tx to this station is not disabled, notify
1424 * mac80211 that this station can now wake up in its
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001425 * STA table.
1426 * If mvmsta is not NULL, sta is valid.
1427 */
Andrei Otcheretianski003e52362014-05-25 17:24:22 +03001428
1429 spin_lock_bh(&mvmsta->lock);
1430
1431 if (!mvmsta->disable_tx)
1432 ieee80211_sta_block_awake(mvm->hw, sta, false);
1433
1434 spin_unlock_bh(&mvmsta->lock);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001435 }
1436
Emmanuel Grumbach9bb0c1a2014-01-20 15:21:26 +02001437 if (PTR_ERR(sta) == -EBUSY || PTR_ERR(sta) == -ENOENT) {
1438 /*
1439 * We are draining and this was the last packet - pre_rcu_remove
1440 * has been called already. We might be after the
1441 * synchronize_net already.
1442 * Don't rely on iwl_mvm_rm_sta to see the empty Tx queues.
1443 */
1444 set_bit(sta_id, mvm->sta_drained);
1445 schedule_work(&mvm->sta_drained_wk);
1446 }
1447
1448out:
Johannes Berg8ca151b2013-01-24 14:25:36 +01001449 rcu_read_unlock();
1450}
1451
1452#ifdef CONFIG_IWLWIFI_DEBUG
1453#define AGG_TX_STATE_(x) case AGG_TX_STATE_ ## x: return #x
1454static const char *iwl_get_agg_tx_status(u16 status)
1455{
1456 switch (status & AGG_TX_STATE_STATUS_MSK) {
1457 AGG_TX_STATE_(TRANSMITTED);
1458 AGG_TX_STATE_(UNDERRUN);
1459 AGG_TX_STATE_(BT_PRIO);
1460 AGG_TX_STATE_(FEW_BYTES);
1461 AGG_TX_STATE_(ABORT);
1462 AGG_TX_STATE_(LAST_SENT_TTL);
1463 AGG_TX_STATE_(LAST_SENT_TRY_CNT);
1464 AGG_TX_STATE_(LAST_SENT_BT_KILL);
1465 AGG_TX_STATE_(SCD_QUERY);
1466 AGG_TX_STATE_(TEST_BAD_CRC32);
1467 AGG_TX_STATE_(RESPONSE);
1468 AGG_TX_STATE_(DUMP_TX);
1469 AGG_TX_STATE_(DELAY_TX);
1470 }
1471
1472 return "UNKNOWN";
1473}
1474
1475static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1476 struct iwl_rx_packet *pkt)
1477{
1478 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1479 struct agg_tx_status *frame_status = &tx_resp->status;
1480 int i;
1481
1482 for (i = 0; i < tx_resp->frame_count; i++) {
1483 u16 fstatus = le16_to_cpu(frame_status[i].status);
1484
1485 IWL_DEBUG_TX_REPLY(mvm,
1486 "status %s (0x%04x), try-count (%d) seq (0x%x)\n",
1487 iwl_get_agg_tx_status(fstatus),
1488 fstatus & AGG_TX_STATE_STATUS_MSK,
1489 (fstatus & AGG_TX_STATE_TRY_CNT_MSK) >>
1490 AGG_TX_STATE_TRY_CNT_POS,
1491 le16_to_cpu(frame_status[i].sequence));
1492 }
1493}
1494#else
1495static void iwl_mvm_rx_tx_cmd_agg_dbg(struct iwl_mvm *mvm,
1496 struct iwl_rx_packet *pkt)
1497{}
1498#endif /* CONFIG_IWLWIFI_DEBUG */
1499
1500static void iwl_mvm_rx_tx_cmd_agg(struct iwl_mvm *mvm,
1501 struct iwl_rx_packet *pkt)
1502{
1503 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1504 int sta_id = IWL_MVM_TX_RES_GET_RA(tx_resp->ra_tid);
1505 int tid = IWL_MVM_TX_RES_GET_TID(tx_resp->ra_tid);
1506 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
Sara Sharon13303c02016-04-10 15:51:54 +03001507 struct iwl_mvm_sta *mvmsta;
Liad Kaufmancf961e12015-08-13 19:16:08 +03001508 int queue = SEQ_TO_QUEUE(sequence);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001509
Liad Kaufmancf961e12015-08-13 19:16:08 +03001510 if (WARN_ON_ONCE(queue < mvm->first_agg_queue &&
1511 (!iwl_mvm_is_dqa_supported(mvm) ||
1512 (queue != IWL_MVM_DQA_BSS_CLIENT_QUEUE))))
Johannes Berg8ca151b2013-01-24 14:25:36 +01001513 return;
1514
1515 if (WARN_ON_ONCE(tid == IWL_TID_NON_QOS))
1516 return;
1517
1518 iwl_mvm_rx_tx_cmd_agg_dbg(mvm, pkt);
1519
1520 rcu_read_lock();
1521
Sara Sharon13303c02016-04-10 15:51:54 +03001522 mvmsta = iwl_mvm_sta_from_staid_rcu(mvm, sta_id);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001523
Sara Sharon13303c02016-04-10 15:51:54 +03001524 if (!WARN_ON_ONCE(!mvmsta)) {
Johannes Berg8ca151b2013-01-24 14:25:36 +01001525 mvmsta->tid_data[tid].rate_n_flags =
1526 le32_to_cpu(tx_resp->initial_rate);
Emmanuel Grumbach9b5452f2014-10-07 10:38:53 +03001527 mvmsta->tid_data[tid].tx_time =
1528 le16_to_cpu(tx_resp->wireless_media_time);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001529 }
1530
1531 rcu_read_unlock();
1532}
1533
Johannes Berg04168412015-06-23 21:22:09 +02001534void iwl_mvm_rx_tx_cmd(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001535{
1536 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1537 struct iwl_mvm_tx_resp *tx_resp = (void *)pkt->data;
1538
1539 if (tx_resp->frame_count == 1)
1540 iwl_mvm_rx_tx_cmd_single(mvm, pkt);
1541 else
1542 iwl_mvm_rx_tx_cmd_agg(mvm, pkt);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001543}
1544
Eyal Shapiraa7130442014-09-14 15:28:09 +03001545static void iwl_mvm_tx_info_from_ba_notif(struct ieee80211_tx_info *info,
1546 struct iwl_mvm_ba_notif *ba_notif,
1547 struct iwl_mvm_tid_data *tid_data)
1548{
1549 info->flags |= IEEE80211_TX_STAT_AMPDU;
1550 info->status.ampdu_ack_len = ba_notif->txed_2_done;
1551 info->status.ampdu_len = ba_notif->txed;
1552 iwl_mvm_hwrate_to_tx_status(tid_data->rate_n_flags,
1553 info);
Emmanuel Grumbach9b5452f2014-10-07 10:38:53 +03001554 /* TODO: not accounted if the whole A-MPDU failed */
1555 info->status.tx_time = tid_data->tx_time;
Eyal Shapiraa7130442014-09-14 15:28:09 +03001556 info->status.status_driver_data[0] =
Gregory Greenman69c7fda2015-12-29 11:26:35 +02001557 (void *)(uintptr_t)ba_notif->reduced_txp;
Eyal Shapira929e6ed2015-01-30 13:40:02 +02001558 info->status.status_driver_data[1] =
1559 (void *)(uintptr_t)tid_data->rate_n_flags;
Eyal Shapiraa7130442014-09-14 15:28:09 +03001560}
1561
Johannes Berg04168412015-06-23 21:22:09 +02001562void iwl_mvm_rx_ba_notif(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001563{
1564 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1565 struct iwl_mvm_ba_notif *ba_notif = (void *)pkt->data;
1566 struct sk_buff_head reclaimed_skbs;
1567 struct iwl_mvm_tid_data *tid_data;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001568 struct ieee80211_sta *sta;
1569 struct iwl_mvm_sta *mvmsta;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001570 struct sk_buff *skb;
1571 int sta_id, tid, freed;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001572 /* "flow" corresponds to Tx queue */
1573 u16 scd_flow = le16_to_cpu(ba_notif->scd_flow);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001574 /* "ssn" is start of block-ack Tx window, corresponds to index
1575 * (in Tx queue's circular buffer) of first TFD/frame in window */
1576 u16 ba_resp_scd_ssn = le16_to_cpu(ba_notif->scd_ssn);
1577
1578 sta_id = ba_notif->sta_id;
1579 tid = ba_notif->tid;
1580
Eyal Shapira2cee4762015-01-16 11:09:30 +02001581 if (WARN_ONCE(sta_id >= IWL_MVM_STATION_COUNT ||
1582 tid >= IWL_MAX_TID_COUNT,
1583 "sta_id %d tid %d", sta_id, tid))
Johannes Berg04168412015-06-23 21:22:09 +02001584 return;
Eyal Shapira2cee4762015-01-16 11:09:30 +02001585
Johannes Berg8ca151b2013-01-24 14:25:36 +01001586 rcu_read_lock();
1587
1588 sta = rcu_dereference(mvm->fw_id_to_mac_id[sta_id]);
1589
1590 /* Reclaiming frames for a station that has been deleted ? */
1591 if (WARN_ON_ONCE(IS_ERR_OR_NULL(sta))) {
1592 rcu_read_unlock();
Johannes Berg04168412015-06-23 21:22:09 +02001593 return;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001594 }
1595
Johannes Berg5b577a92013-11-14 18:20:04 +01001596 mvmsta = iwl_mvm_sta_from_mac80211(sta);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001597 tid_data = &mvmsta->tid_data[tid];
1598
Johannes Berg1f16ea22015-03-06 09:17:37 +01001599 if (tid_data->txq_id != scd_flow) {
1600 IWL_ERR(mvm,
1601 "invalid BA notification: Q %d, tid %d, flow %d\n",
1602 tid_data->txq_id, tid, scd_flow);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001603 rcu_read_unlock();
Johannes Berg04168412015-06-23 21:22:09 +02001604 return;
Johannes Berg8ca151b2013-01-24 14:25:36 +01001605 }
1606
Johannes Berg2bfb5092012-12-27 21:43:48 +01001607 spin_lock_bh(&mvmsta->lock);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001608
1609 __skb_queue_head_init(&reclaimed_skbs);
1610
1611 /*
1612 * Release all TFDs before the SSN, i.e. all TFDs in front of
1613 * block-ack window (we assume that they've been successfully
1614 * transmitted ... if not, it's too late anyway).
1615 */
1616 iwl_trans_reclaim(mvm->trans, scd_flow, ba_resp_scd_ssn,
1617 &reclaimed_skbs);
1618
1619 IWL_DEBUG_TX_REPLY(mvm,
1620 "BA_NOTIFICATION Received from %pM, sta_id = %d\n",
1621 (u8 *)&ba_notif->sta_addr_lo32,
1622 ba_notif->sta_id);
1623 IWL_DEBUG_TX_REPLY(mvm,
1624 "TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = %d, scd_ssn = %d sent:%d, acked:%d\n",
1625 ba_notif->tid, le16_to_cpu(ba_notif->seq_ctl),
1626 (unsigned long long)le64_to_cpu(ba_notif->bitmap),
1627 scd_flow, ba_resp_scd_ssn, ba_notif->txed,
1628 ba_notif->txed_2_done);
1629
Gregory Greenman69c7fda2015-12-29 11:26:35 +02001630 IWL_DEBUG_TX_REPLY(mvm, "reduced txp from ba notif %d\n",
1631 ba_notif->reduced_txp);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001632 tid_data->next_reclaimed = ba_resp_scd_ssn;
1633
1634 iwl_mvm_check_ratid_empty(mvm, sta, tid);
1635
1636 freed = 0;
1637
1638 skb_queue_walk(&reclaimed_skbs, skb) {
Johannes Berg143582c2014-02-25 10:37:15 +01001639 struct ieee80211_hdr *hdr = (void *)skb->data;
1640 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001641
1642 if (ieee80211_is_data_qos(hdr->frame_control))
1643 freed++;
1644 else
1645 WARN_ON_ONCE(1);
1646
Johannes Berg8ca151b2013-01-24 14:25:36 +01001647 iwl_trans_free_tx_cmd(mvm->trans, info->driver_data[1]);
1648
Johannes Berg143582c2014-02-25 10:37:15 +01001649 memset(&info->status, 0, sizeof(info->status));
1650 /* Packet was transmitted successfully, failures come as single
1651 * frames because before failing a frame the firmware transmits
1652 * it without aggregation at least once.
1653 */
1654 info->flags |= IEEE80211_TX_STAT_ACK;
1655
Eyal Shapiraa7130442014-09-14 15:28:09 +03001656 /* this is the first skb we deliver in this batch */
1657 /* put the rate scaling data there */
1658 if (freed == 1)
1659 iwl_mvm_tx_info_from_ba_notif(info, ba_notif, tid_data);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001660 }
1661
Johannes Berg2bfb5092012-12-27 21:43:48 +01001662 spin_unlock_bh(&mvmsta->lock);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001663
Eyal Shapiraa7130442014-09-14 15:28:09 +03001664 /* We got a BA notif with 0 acked or scd_ssn didn't progress which is
1665 * possible (i.e. first MPDU in the aggregation wasn't acked)
1666 * Still it's important to update RS about sent vs. acked.
1667 */
1668 if (skb_queue_empty(&reclaimed_skbs)) {
1669 struct ieee80211_tx_info ba_info = {};
1670 struct ieee80211_chanctx_conf *chanctx_conf = NULL;
1671
1672 if (mvmsta->vif)
1673 chanctx_conf =
1674 rcu_dereference(mvmsta->vif->chanctx_conf);
1675
1676 if (WARN_ON_ONCE(!chanctx_conf))
1677 goto out;
1678
1679 ba_info.band = chanctx_conf->def.chan->band;
1680 iwl_mvm_tx_info_from_ba_notif(&ba_info, ba_notif, tid_data);
1681
1682 IWL_DEBUG_TX_REPLY(mvm, "No reclaim. Update rs directly\n");
Matti Gottliebff7a68d2016-05-17 10:50:08 +03001683 iwl_mvm_rs_tx_status(mvm, sta, tid, &ba_info, false);
Eyal Shapiraa7130442014-09-14 15:28:09 +03001684 }
1685
1686out:
Johannes Berg8ca151b2013-01-24 14:25:36 +01001687 rcu_read_unlock();
1688
1689 while (!skb_queue_empty(&reclaimed_skbs)) {
1690 skb = __skb_dequeue(&reclaimed_skbs);
Johannes Bergf14d6b32014-03-21 13:30:03 +01001691 ieee80211_tx_status(mvm->hw, skb);
Johannes Berg8ca151b2013-01-24 14:25:36 +01001692 }
Johannes Berg8ca151b2013-01-24 14:25:36 +01001693}
1694
Emmanuel Grumbachfe92e322015-03-11 09:34:31 +02001695/*
1696 * Note that there are transports that buffer frames before they reach
1697 * the firmware. This means that after flush_tx_path is called, the
1698 * queue might not be empty. The race-free way to handle this is to:
1699 * 1) set the station as draining
1700 * 2) flush the Tx path
1701 * 3) wait for the transport queues to be empty
1702 */
Luca Coelho5888a402015-10-06 09:54:57 +03001703int iwl_mvm_flush_tx_path(struct iwl_mvm *mvm, u32 tfd_msk, u32 flags)
Johannes Berg8ca151b2013-01-24 14:25:36 +01001704{
1705 int ret;
1706 struct iwl_tx_path_flush_cmd flush_cmd = {
1707 .queues_ctl = cpu_to_le32(tfd_msk),
1708 .flush_ctl = cpu_to_le16(DUMP_TX_FIFO_FLUSH),
1709 };
1710
Johannes Berg8ca151b2013-01-24 14:25:36 +01001711 ret = iwl_mvm_send_cmd_pdu(mvm, TXPATH_FLUSH, flags,
1712 sizeof(flush_cmd), &flush_cmd);
1713 if (ret)
1714 IWL_ERR(mvm, "Failed to send flush command (%d)\n", ret);
1715 return ret;
1716}