735 lines · c
1/*2 * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e@gmail.com>3 *4 * Permission to use, copy, modify, and/or distribute this software for any5 * purpose with or without fee is hereby granted, provided that the above6 * copyright notice and this permission notice appear in all copies.7 *8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.15 */16 17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt18 19#include <linux/random.h>20#include "txrx.h"21 22static inline int get_rssi0(struct wcn36xx_rx_bd *bd)23{24 return 100 - ((bd->phy_stat0 >> 24) & 0xff);25}26 27static inline int get_snr(struct wcn36xx_rx_bd *bd)28{29 return ((bd->phy_stat1 >> 24) & 0xff);30}31 32struct wcn36xx_rate {33 u16 bitrate;34 u16 mcs_or_legacy_index;35 enum mac80211_rx_encoding encoding;36 enum mac80211_rx_encoding_flags encoding_flags;37 enum rate_info_bw bw;38};39 40/* Buffer descriptor rx_ch field is limited to 5-bit (4+1), a mapping is used41 * for 11A Channels.42 */43static const u8 ab_rx_ch_map[] = { 36, 40, 44, 48, 52, 56, 60, 64, 100, 104,44 108, 112, 116, 120, 124, 128, 132, 136, 140,45 149, 153, 157, 161, 165, 144 };46 47static const struct wcn36xx_rate wcn36xx_rate_table[] = {48 /* 11b rates */49 { 10, 0, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },50 { 20, 1, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },51 { 55, 2, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },52 { 110, 3, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },53 54 /* 11b SP (short preamble) */55 { 10, 0, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },56 { 20, 1, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },57 { 55, 2, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },58 { 110, 3, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 },59 60 /* 11ag */61 { 60, 4, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },62 { 90, 5, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },63 { 120, 6, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },64 { 180, 7, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },65 { 240, 8, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },66 { 360, 9, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },67 { 480, 10, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },68 { 540, 11, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 },69 70 /* 11n */71 { 65, 0, RX_ENC_HT, 0, RATE_INFO_BW_20 },72 { 130, 1, RX_ENC_HT, 0, RATE_INFO_BW_20 },73 { 195, 2, RX_ENC_HT, 0, RATE_INFO_BW_20 },74 { 260, 3, RX_ENC_HT, 0, RATE_INFO_BW_20 },75 { 390, 4, RX_ENC_HT, 0, RATE_INFO_BW_20 },76 { 520, 5, RX_ENC_HT, 0, RATE_INFO_BW_20 },77 { 585, 6, RX_ENC_HT, 0, RATE_INFO_BW_20 },78 { 650, 7, RX_ENC_HT, 0, RATE_INFO_BW_20 },79 80 /* 11n SGI */81 { 72, 0, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },82 { 144, 1, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },83 { 217, 2, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },84 { 289, 3, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },85 { 434, 4, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },86 { 578, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },87 { 650, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },88 { 722, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },89 90 /* 11n GF (greenfield) */91 { 65, 0, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },92 { 130, 1, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },93 { 195, 2, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },94 { 260, 3, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },95 { 390, 4, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },96 { 520, 5, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },97 { 585, 6, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },98 { 650, 7, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 },99 100 /* 11n CB (channel bonding) */101 { 135, 0, RX_ENC_HT, 0, RATE_INFO_BW_40 },102 { 270, 1, RX_ENC_HT, 0, RATE_INFO_BW_40 },103 { 405, 2, RX_ENC_HT, 0, RATE_INFO_BW_40 },104 { 540, 3, RX_ENC_HT, 0, RATE_INFO_BW_40 },105 { 810, 4, RX_ENC_HT, 0, RATE_INFO_BW_40 },106 { 1080, 5, RX_ENC_HT, 0, RATE_INFO_BW_40 },107 { 1215, 6, RX_ENC_HT, 0, RATE_INFO_BW_40 },108 { 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 },109 110 /* 11n CB + SGI */111 { 150, 0, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },112 { 300, 1, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },113 { 450, 2, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },114 { 600, 3, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },115 { 900, 4, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },116 { 1200, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },117 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },118 { 1500, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },119 120 /* 11n GF + CB */121 { 135, 0, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },122 { 270, 1, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },123 { 405, 2, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },124 { 540, 3, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },125 { 810, 4, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },126 { 1080, 5, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },127 { 1215, 6, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },128 { 1350, 7, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 },129 130 /* 11ac reserved indices */131 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },132 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },133 134 /* 11ac 20 MHz 800ns GI MCS 0-8 */135 { 65, 0, RX_ENC_HT, 0, RATE_INFO_BW_20 },136 { 130, 1, RX_ENC_HT, 0, RATE_INFO_BW_20 },137 { 195, 2, RX_ENC_HT, 0, RATE_INFO_BW_20 },138 { 260, 3, RX_ENC_HT, 0, RATE_INFO_BW_20 },139 { 390, 4, RX_ENC_HT, 0, RATE_INFO_BW_20 },140 { 520, 5, RX_ENC_HT, 0, RATE_INFO_BW_20 },141 { 585, 6, RX_ENC_HT, 0, RATE_INFO_BW_20 },142 { 650, 7, RX_ENC_HT, 0, RATE_INFO_BW_20 },143 { 780, 8, RX_ENC_HT, 0, RATE_INFO_BW_20 },144 145 /* 11ac reserved indices */146 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },147 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },148 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },149 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },150 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },151 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },152 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },153 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },154 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },155 156 /* 11ac 20 MHz 400ns SGI MCS 6-8 */157 { 655, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },158 { 722, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },159 { 866, 8, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 },160 161 /* 11ac reserved indices */162 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },163 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },164 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },165 166 /* 11ac 40 MHz 800ns GI MCS 0-9 */167 { 135, 0, RX_ENC_HT, 0, RATE_INFO_BW_40 },168 { 270, 1, RX_ENC_HT, 0, RATE_INFO_BW_40 },169 { 405, 2, RX_ENC_HT, 0, RATE_INFO_BW_40 },170 { 540, 3, RX_ENC_HT, 0, RATE_INFO_BW_40 },171 { 810, 4, RX_ENC_HT, 0, RATE_INFO_BW_40 },172 { 1080, 5, RX_ENC_HT, 0, RATE_INFO_BW_40 },173 { 1215, 6, RX_ENC_HT, 0, RATE_INFO_BW_40 },174 { 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 },175 { 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 },176 { 1620, 8, RX_ENC_HT, 0, RATE_INFO_BW_40 },177 { 1800, 9, RX_ENC_HT, 0, RATE_INFO_BW_40 },178 179 /* 11ac reserved indices */180 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },181 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },182 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },183 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },184 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },185 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },186 187 /* 11ac 40 MHz 400ns SGI MCS 5-7 */188 { 1200, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },189 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },190 { 1500, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },191 192 /* 11ac reserved index */193 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },194 195 /* 11ac 40 MHz 400ns SGI MCS 5-7 */196 { 1800, 8, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },197 { 2000, 9, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },198 199 /* 11ac reserved index */200 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },201 202 /* 11ac 80 MHz 800ns GI MCS 0-7 */203 { 292, 0, RX_ENC_HT, 0, RATE_INFO_BW_80},204 { 585, 1, RX_ENC_HT, 0, RATE_INFO_BW_80},205 { 877, 2, RX_ENC_HT, 0, RATE_INFO_BW_80},206 { 1170, 3, RX_ENC_HT, 0, RATE_INFO_BW_80},207 { 1755, 4, RX_ENC_HT, 0, RATE_INFO_BW_80},208 { 2340, 5, RX_ENC_HT, 0, RATE_INFO_BW_80},209 { 2632, 6, RX_ENC_HT, 0, RATE_INFO_BW_80},210 { 2925, 7, RX_ENC_HT, 0, RATE_INFO_BW_80},211 212 /* 11 ac reserved index */213 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },214 215 /* 11ac 80 MHz 800 ns GI MCS 8-9 */216 { 3510, 8, RX_ENC_HT, 0, RATE_INFO_BW_80},217 { 3900, 9, RX_ENC_HT, 0, RATE_INFO_BW_80},218 219 /* 11 ac reserved indices */220 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },221 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },222 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },223 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },224 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },225 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },226 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },227 228 /* 11ac 80 MHz 400 ns SGI MCS 6-7 */229 { 2925, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },230 { 3250, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },231 232 /* 11ac reserved index */233 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 },234 235 /* 11ac 80 MHz 400ns SGI MCS 8-9 */236 { 3900, 8, RX_ENC_VHT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },237 { 4333, 9, RX_ENC_VHT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 },238};239 240static struct sk_buff *wcn36xx_unchain_msdu(struct sk_buff_head *amsdu)241{242 struct sk_buff *skb, *first;243 int total_len = 0;244 int space;245 246 first = __skb_dequeue(amsdu);247 248 skb_queue_walk(amsdu, skb)249 total_len += skb->len;250 251 space = total_len - skb_tailroom(first);252 if (space > 0 && pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0) {253 __skb_queue_head(amsdu, first);254 return NULL;255 }256 257 /* Walk list again, copying contents into msdu_head */258 while ((skb = __skb_dequeue(amsdu))) {259 skb_copy_from_linear_data(skb, skb_put(first, skb->len),260 skb->len);261 dev_kfree_skb_irq(skb);262 }263 264 return first;265}266 267static void __skb_queue_purge_irq(struct sk_buff_head *list)268{269 struct sk_buff *skb;270 271 while ((skb = __skb_dequeue(list)) != NULL)272 dev_kfree_skb_irq(skb);273}274 275static void wcn36xx_update_survey(struct wcn36xx *wcn, int rssi, int snr,276 int band, int freq)277{278 static struct ieee80211_channel *channel;279 struct ieee80211_supported_band *sband;280 int idx;281 int i;282 u8 snr_sample = snr & 0xff;283 284 idx = 0;285 if (band == NL80211_BAND_5GHZ)286 idx = wcn->hw->wiphy->bands[NL80211_BAND_2GHZ]->n_channels;287 288 sband = wcn->hw->wiphy->bands[band];289 channel = sband->channels;290 291 for (i = 0; i < sband->n_channels; i++, channel++) {292 if (channel->center_freq == freq) {293 idx += i;294 break;295 }296 }297 298 spin_lock(&wcn->survey_lock);299 wcn->chan_survey[idx].rssi = rssi;300 wcn->chan_survey[idx].snr = snr;301 spin_unlock(&wcn->survey_lock);302 303 add_device_randomness(&snr_sample, sizeof(snr_sample));304}305 306int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb)307{308 struct ieee80211_rx_status status;309 const struct wcn36xx_rate *rate;310 struct ieee80211_hdr *hdr;311 struct wcn36xx_rx_bd *bd;312 u16 fc, sn;313 314 /*315 * All fields must be 0, otherwise it can lead to316 * unexpected consequences.317 */318 memset(&status, 0, sizeof(status));319 320 bd = (struct wcn36xx_rx_bd *)skb->data;321 buff_to_be(bd, sizeof(*bd)/sizeof(u32));322 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP,323 "BD <<< ", (char *)bd,324 sizeof(struct wcn36xx_rx_bd));325 326 if (bd->pdu.mpdu_data_off <= bd->pdu.mpdu_header_off ||327 bd->pdu.mpdu_len < bd->pdu.mpdu_header_len)328 goto drop;329 330 if (bd->asf && !bd->esf) { /* chained A-MSDU chunks */331 /* Sanity check */332 if (bd->pdu.mpdu_data_off + bd->pdu.mpdu_len > WCN36XX_PKT_SIZE)333 goto drop;334 335 skb_put(skb, bd->pdu.mpdu_data_off + bd->pdu.mpdu_len);336 skb_pull(skb, bd->pdu.mpdu_data_off);337 338 /* Only set status for first chained BD (with mac header) */339 goto done;340 }341 342 if (bd->pdu.mpdu_header_off < sizeof(*bd) ||343 bd->pdu.mpdu_header_off + bd->pdu.mpdu_len > WCN36XX_PKT_SIZE)344 goto drop;345 346 skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len);347 skb_pull(skb, bd->pdu.mpdu_header_off);348 349 hdr = (struct ieee80211_hdr *) skb->data;350 fc = __le16_to_cpu(hdr->frame_control);351 sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl));352 353 status.mactime = 10;354 status.signal = -get_rssi0(bd);355 status.antenna = 1;356 status.flag = 0;357 status.rx_flags = 0;358 status.flag |= RX_FLAG_IV_STRIPPED |359 RX_FLAG_MMIC_STRIPPED |360 RX_FLAG_DECRYPTED;361 362 wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x\n", status.flag);363 364 if (bd->scan_learn) {365 /* If packet originate from hardware scanning, extract the366 * band/channel from bd descriptor.367 */368 u8 hwch = (bd->reserved0 << 4) + bd->rx_ch;369 370 if (bd->rf_band != 1 && hwch <= sizeof(ab_rx_ch_map) && hwch >= 1) {371 status.band = NL80211_BAND_5GHZ;372 status.freq = ieee80211_channel_to_frequency(ab_rx_ch_map[hwch - 1],373 status.band);374 } else {375 status.band = NL80211_BAND_2GHZ;376 status.freq = ieee80211_channel_to_frequency(hwch, status.band);377 }378 } else {379 status.band = WCN36XX_BAND(wcn);380 status.freq = WCN36XX_CENTER_FREQ(wcn);381 }382 383 wcn36xx_update_survey(wcn, status.signal, get_snr(bd),384 status.band, status.freq);385 386 if (bd->rate_id < ARRAY_SIZE(wcn36xx_rate_table)) {387 rate = &wcn36xx_rate_table[bd->rate_id];388 status.encoding = rate->encoding;389 status.enc_flags = rate->encoding_flags;390 status.bw = rate->bw;391 status.rate_idx = rate->mcs_or_legacy_index;392 status.nss = 1;393 394 if (status.band == NL80211_BAND_5GHZ &&395 status.encoding == RX_ENC_LEGACY &&396 status.rate_idx >= 4) {397 /* no dsss rates in 5Ghz rates table */398 status.rate_idx -= 4;399 }400 } else {401 status.encoding = 0;402 status.bw = 0;403 status.enc_flags = 0;404 status.rate_idx = 0;405 }406 407 if (ieee80211_is_beacon(hdr->frame_control) ||408 ieee80211_is_probe_resp(hdr->frame_control))409 status.boottime_ns = ktime_get_boottime_ns();410 411 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));412 413 if (ieee80211_is_beacon(hdr->frame_control)) {414 wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n",415 skb, skb->len, fc, sn);416 wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ",417 (char *)skb->data, skb->len);418 } else {419 wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n",420 skb, skb->len, fc, sn);421 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ",422 (char *)skb->data, skb->len);423 }424 425done:426 /* Chained AMSDU ? slow path */427 if (unlikely(bd->asf && !(bd->lsf && bd->esf))) {428 if (bd->esf && !skb_queue_empty(&wcn->amsdu)) {429 wcn36xx_err("Discarding non complete chain");430 __skb_queue_purge_irq(&wcn->amsdu);431 }432 433 __skb_queue_tail(&wcn->amsdu, skb);434 435 if (!bd->lsf)436 return 0; /* Not the last AMSDU, wait for more */437 438 skb = wcn36xx_unchain_msdu(&wcn->amsdu);439 if (!skb)440 goto drop;441 }442 443 ieee80211_rx_irqsafe(wcn->hw, skb);444 445 return 0;446 447drop: /* drop everything */448 wcn36xx_err("Drop frame! skb:%p len:%u hoff:%u doff:%u asf=%u esf=%u lsf=%u\n",449 skb, bd->pdu.mpdu_len, bd->pdu.mpdu_header_off,450 bd->pdu.mpdu_data_off, bd->asf, bd->esf, bd->lsf);451 452 dev_kfree_skb_irq(skb);453 __skb_queue_purge_irq(&wcn->amsdu);454 455 return -EINVAL;456}457 458static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd,459 u32 mpdu_header_len,460 u32 len,461 u16 tid)462{463 bd->pdu.mpdu_header_len = mpdu_header_len;464 bd->pdu.mpdu_header_off = sizeof(*bd);465 bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len +466 bd->pdu.mpdu_header_off;467 bd->pdu.mpdu_len = len;468 bd->pdu.tid = tid;469}470 471static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn,472 u8 *addr)473{474 struct wcn36xx_vif *vif_priv = NULL;475 struct ieee80211_vif *vif = NULL;476 list_for_each_entry(vif_priv, &wcn->vif_list, list) {477 vif = wcn36xx_priv_to_vif(vif_priv);478 if (memcmp(vif->addr, addr, ETH_ALEN) == 0)479 return vif_priv;480 }481 wcn36xx_warn("vif %pM not found\n", addr);482 return NULL;483}484 485static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn,486 struct wcn36xx_sta *sta_priv,487 struct sk_buff *skb)488{489 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;490 struct ieee80211_sta *sta;491 u8 *qc, tid;492 493 if (!conf_is_ht(&wcn->hw->conf))494 return;495 496 sta = wcn36xx_priv_to_sta(sta_priv);497 498 if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control)))499 return;500 501 if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO)502 return;503 504 qc = ieee80211_get_qos_ctl(hdr);505 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;506 507 spin_lock(&sta_priv->ampdu_lock);508 if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE)509 goto out_unlock;510 511 if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) {512 sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START;513 sta_priv->non_agg_frame_ct = 0;514 ieee80211_start_tx_ba_session(sta, tid, 0);515 }516out_unlock:517 spin_unlock(&sta_priv->ampdu_lock);518}519 520static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd,521 struct wcn36xx *wcn,522 struct wcn36xx_vif **vif_priv,523 struct wcn36xx_sta *sta_priv,524 struct sk_buff *skb,525 bool bcast)526{527 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;528 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);529 struct ieee80211_vif *vif = NULL;530 struct wcn36xx_vif *__vif_priv = NULL;531 bool is_data_qos = ieee80211_is_data_qos(hdr->frame_control);532 u16 tid = 0;533 534 bd->bd_rate = WCN36XX_BD_RATE_DATA;535 536 /*537 * For not unicast frames mac80211 will not set sta pointer so use538 * self_sta_index instead.539 */540 if (sta_priv) {541 __vif_priv = sta_priv->vif;542 vif = wcn36xx_priv_to_vif(__vif_priv);543 544 bd->dpu_sign = sta_priv->ucast_dpu_sign;545 if (vif->type == NL80211_IFTYPE_STATION) {546 bd->sta_index = sta_priv->bss_sta_index;547 bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index;548 } else if (vif->type == NL80211_IFTYPE_AP ||549 vif->type == NL80211_IFTYPE_ADHOC ||550 vif->type == NL80211_IFTYPE_MESH_POINT) {551 bd->sta_index = sta_priv->sta_index;552 bd->dpu_desc_idx = sta_priv->dpu_desc_index;553 }554 } else {555 __vif_priv = get_vif_by_addr(wcn, hdr->addr2);556 bd->sta_index = __vif_priv->self_sta_index;557 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;558 bd->dpu_sign = __vif_priv->self_ucast_dpu_sign;559 }560 561 if (is_data_qos) {562 tid = ieee80211_get_tid(hdr);563 /* TID->QID is one-to-one mapping */564 bd->queue_id = tid;565 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS;566 } else {567 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS;568 }569 570 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT ||571 (sta_priv && !sta_priv->is_data_encrypted)) {572 bd->dpu_ne = 1;573 }574 575 if (ieee80211_is_any_nullfunc(hdr->frame_control)) {576 /* Don't use a regular queue for null packet (no ampdu) */577 bd->queue_id = WCN36XX_TX_U_WQ_ID;578 bd->bd_rate = WCN36XX_BD_RATE_CTRL;579 if (ieee80211_is_qos_nullfunc(hdr->frame_control))580 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_HOST;581 }582 583 if (bcast) {584 bd->ub = 1;585 bd->ack_policy = 1;586 }587 *vif_priv = __vif_priv;588 589 wcn36xx_set_tx_pdu(bd,590 is_data_qos ?591 sizeof(struct ieee80211_qos_hdr) :592 sizeof(struct ieee80211_hdr_3addr),593 skb->len, tid);594 595 if (sta_priv && is_data_qos)596 wcn36xx_tx_start_ampdu(wcn, sta_priv, skb);597}598 599static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd,600 struct wcn36xx *wcn,601 struct wcn36xx_vif **vif_priv,602 struct sk_buff *skb,603 bool bcast)604{605 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;606 struct wcn36xx_vif *__vif_priv =607 get_vif_by_addr(wcn, hdr->addr2);608 bd->sta_index = __vif_priv->self_sta_index;609 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index;610 bd->dpu_ne = 1;611 612 /* default rate for unicast */613 if (ieee80211_is_mgmt(hdr->frame_control))614 bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ?615 WCN36XX_BD_RATE_CTRL :616 WCN36XX_BD_RATE_MGMT;617 else if (ieee80211_is_ctl(hdr->frame_control))618 bd->bd_rate = WCN36XX_BD_RATE_CTRL;619 else620 wcn36xx_warn("frame control type unknown\n");621 622 /*623 * In joining state trick hardware that probe is sent as624 * unicast even if address is broadcast.625 */626 if (__vif_priv->is_joining &&627 ieee80211_is_probe_req(hdr->frame_control))628 bcast = false;629 630 if (bcast) {631 /* broadcast */632 bd->ub = 1;633 /* No ack needed not unicast */634 bd->ack_policy = 1;635 bd->queue_id = WCN36XX_TX_B_WQ_ID;636 } else637 bd->queue_id = WCN36XX_TX_U_WQ_ID;638 *vif_priv = __vif_priv;639 640 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS;641 642 wcn36xx_set_tx_pdu(bd,643 ieee80211_is_data_qos(hdr->frame_control) ?644 sizeof(struct ieee80211_qos_hdr) :645 sizeof(struct ieee80211_hdr_3addr),646 skb->len, WCN36XX_TID);647}648 649int wcn36xx_start_tx(struct wcn36xx *wcn,650 struct wcn36xx_sta *sta_priv,651 struct sk_buff *skb)652{653 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;654 struct wcn36xx_vif *vif_priv = NULL;655 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);656 bool is_low = ieee80211_is_data(hdr->frame_control);657 bool bcast = is_broadcast_ether_addr(hdr->addr1) ||658 is_multicast_ether_addr(hdr->addr1);659 bool ack_ind = (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) &&660 !(info->flags & IEEE80211_TX_CTL_NO_ACK);661 struct wcn36xx_tx_bd bd;662 int ret;663 664 memset(&bd, 0, sizeof(bd));665 666 wcn36xx_dbg(WCN36XX_DBG_TX,667 "tx skb %p len %d fc %04x sn %d %s %s\n",668 skb, skb->len, __le16_to_cpu(hdr->frame_control),669 IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)),670 is_low ? "low" : "high", bcast ? "bcast" : "ucast");671 672 wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len);673 674 bd.dpu_rf = WCN36XX_BMU_WQ_TX;675 676 if (unlikely(ack_ind)) {677 wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n");678 679 /* Only one at a time is supported by fw. Stop the TX queues680 * until the ack status gets back.681 */682 ieee80211_stop_queues(wcn->hw);683 684 /* Request ack indication from the firmware */685 bd.tx_comp = 1;686 }687 688 /* Data frames served first*/689 if (is_low)690 wcn36xx_set_tx_data(&bd, wcn, &vif_priv, sta_priv, skb, bcast);691 else692 /* MGMT and CTRL frames are handeld here*/693 wcn36xx_set_tx_mgmt(&bd, wcn, &vif_priv, skb, bcast);694 695 buff_to_be(&bd, sizeof(bd)/sizeof(u32));696 bd.tx_bd_sign = 0xbdbdbdbd;697 698 ret = wcn36xx_dxe_tx_frame(wcn, vif_priv, &bd, skb, is_low);699 if (unlikely(ret && ack_ind)) {700 /* If the skb has not been transmitted, resume TX queue */701 ieee80211_wake_queues(wcn->hw);702 }703 704 return ret;705}706 707void wcn36xx_process_tx_rate(struct ani_global_class_a_stats_info *stats, struct rate_info *info)708{709 /* tx_rate is in units of 500kbps; mac80211 wants them in 100kbps */710 if (stats->tx_rate_flags & HAL_TX_RATE_LEGACY)711 info->legacy = stats->tx_rate * 5;712 713 info->flags = 0;714 info->mcs = stats->mcs_index;715 info->nss = 1;716 717 if (stats->tx_rate_flags & (HAL_TX_RATE_HT20 | HAL_TX_RATE_HT40))718 info->flags |= RATE_INFO_FLAGS_MCS;719 720 if (stats->tx_rate_flags & (HAL_TX_RATE_VHT20 | HAL_TX_RATE_VHT40 | HAL_TX_RATE_VHT80))721 info->flags |= RATE_INFO_FLAGS_VHT_MCS;722 723 if (stats->tx_rate_flags & HAL_TX_RATE_SGI)724 info->flags |= RATE_INFO_FLAGS_SHORT_GI;725 726 if (stats->tx_rate_flags & (HAL_TX_RATE_HT20 | HAL_TX_RATE_VHT20))727 info->bw = RATE_INFO_BW_20;728 729 if (stats->tx_rate_flags & (HAL_TX_RATE_HT40 | HAL_TX_RATE_VHT40))730 info->bw = RATE_INFO_BW_40;731 732 if (stats->tx_rate_flags & HAL_TX_RATE_VHT80)733 info->bw = RATE_INFO_BW_80;734}735