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 any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION 13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN 14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19#include "txrx.h" 20 21static inline int get_rssi0(struct wcn36xx_rx_bd *bd) 22{ 23 return 100 - ((bd->phy_stat0 >> 24) & 0xff); 24} 25 26struct wcn36xx_rate { 27 u16 bitrate; 28 u16 mcs_or_legacy_index; 29 enum mac80211_rx_encoding encoding; 30 enum mac80211_rx_encoding_flags encoding_flags; 31 enum rate_info_bw bw; 32}; 33 34/* Buffer descriptor rx_ch field is limited to 5-bit (4+1), a mapping is used 35 * for 11A Channels. 36 */ 37static const u8 ab_rx_ch_map[] = { 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 38 108, 112, 116, 120, 124, 128, 132, 136, 140, 39 149, 153, 157, 161, 165, 144 }; 40 41static const struct wcn36xx_rate wcn36xx_rate_table[] = { 42 /* 11b rates */ 43 { 10, 0, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 44 { 20, 1, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 45 { 55, 2, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 46 { 110, 3, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 47 48 /* 11b SP (short preamble) */ 49 { 10, 0, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 }, 50 { 20, 1, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 }, 51 { 55, 2, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 }, 52 { 110, 3, RX_ENC_LEGACY, RX_ENC_FLAG_SHORTPRE, RATE_INFO_BW_20 }, 53 54 /* 11ag */ 55 { 60, 4, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 56 { 90, 5, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 57 { 120, 6, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 58 { 180, 7, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 59 { 240, 8, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 60 { 360, 9, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 61 { 480, 10, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 62 { 540, 11, RX_ENC_LEGACY, 0, RATE_INFO_BW_20 }, 63 64 /* 11n */ 65 { 65, 0, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 66 { 130, 1, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 67 { 195, 2, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 68 { 260, 3, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 69 { 390, 4, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 70 { 520, 5, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 71 { 585, 6, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 72 { 650, 7, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 73 74 /* 11n SGI */ 75 { 72, 0, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 76 { 144, 1, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 77 { 217, 2, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 78 { 289, 3, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 79 { 434, 4, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 80 { 578, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 81 { 650, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 82 { 722, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 83 84 /* 11n GF (greenfield) */ 85 { 65, 0, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 86 { 130, 1, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 87 { 195, 2, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 88 { 260, 3, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 89 { 390, 4, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 90 { 520, 5, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 91 { 585, 6, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 92 { 650, 7, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_20 }, 93 94 /* 11n CB (channel bonding) */ 95 { 135, 0, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 96 { 270, 1, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 97 { 405, 2, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 98 { 540, 3, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 99 { 810, 4, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 100 { 1080, 5, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 101 { 1215, 6, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 102 { 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 103 104 /* 11n CB + SGI */ 105 { 150, 0, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 106 { 300, 1, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 107 { 450, 2, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 108 { 600, 3, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 109 { 900, 4, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 110 { 1200, 5, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 111 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 112 { 1500, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 113 114 /* 11n GF + CB */ 115 { 135, 0, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 116 { 270, 1, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 117 { 405, 2, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 118 { 540, 3, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 119 { 810, 4, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 120 { 1080, 5, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 121 { 1215, 6, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 122 { 1350, 7, RX_ENC_HT, RX_ENC_FLAG_HT_GF, RATE_INFO_BW_40 }, 123 124 /* 11ac reserved indices */ 125 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 126 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 127 128 /* 11ac 20 MHz 800ns GI MCS 0-8 */ 129 { 65, 0, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 130 { 130, 1, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 131 { 195, 2, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 132 { 260, 3, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 133 { 390, 4, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 134 { 520, 5, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 135 { 585, 6, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 136 { 650, 7, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 137 { 780, 8, RX_ENC_HT, 0, RATE_INFO_BW_20 }, 138 139 /* 11ac reserved indices */ 140 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 141 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 142 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 143 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 144 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 145 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 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 }, 149 150 /* 11ac 20 MHz 400ns SGI MCS 6-8 */ 151 { 655, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 152 { 722, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 153 { 866, 8, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_20 }, 154 155 /* 11ac reserved indices */ 156 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 157 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 158 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 159 160 /* 11ac 40 MHz 800ns GI MCS 0-9 */ 161 { 135, 0, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 162 { 270, 1, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 163 { 405, 2, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 164 { 540, 3, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 165 { 810, 4, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 166 { 1080, 5, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 167 { 1215, 6, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 168 { 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 169 { 1350, 7, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 170 { 1620, 8, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 171 { 1800, 9, RX_ENC_HT, 0, RATE_INFO_BW_40 }, 172 173 /* 11ac reserved indices */ 174 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 175 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 176 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 177 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 178 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 179 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 180 181 /* 11ac 40 MHz 400ns SGI MCS 5-7 */ 182 { 1200, 5, 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 { 1500, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 185 186 /* 11ac reserved index */ 187 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 188 189 /* 11ac 40 MHz 400ns SGI MCS 5-7 */ 190 { 1800, 8, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 191 { 2000, 9, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 192 193 /* 11ac reserved index */ 194 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 195 196 /* 11ac 80 MHz 800ns GI MCS 0-7 */ 197 { 292, 0, RX_ENC_HT, 0, RATE_INFO_BW_80}, 198 { 585, 1, RX_ENC_HT, 0, RATE_INFO_BW_80}, 199 { 877, 2, RX_ENC_HT, 0, RATE_INFO_BW_80}, 200 { 1170, 3, RX_ENC_HT, 0, RATE_INFO_BW_80}, 201 { 1755, 4, RX_ENC_HT, 0, RATE_INFO_BW_80}, 202 { 2340, 5, RX_ENC_HT, 0, RATE_INFO_BW_80}, 203 { 2632, 6, RX_ENC_HT, 0, RATE_INFO_BW_80}, 204 { 2925, 7, RX_ENC_HT, 0, RATE_INFO_BW_80}, 205 206 /* 11 ac reserved index */ 207 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 208 209 /* 11ac 80 MHz 800 ns GI MCS 8-9 */ 210 { 3510, 8, RX_ENC_HT, 0, RATE_INFO_BW_80}, 211 { 3900, 9, RX_ENC_HT, 0, RATE_INFO_BW_80}, 212 213 /* 11 ac reserved indices */ 214 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 215 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 216 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 217 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 218 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 219 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 220 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 221 222 /* 11ac 80 MHz 400 ns SGI MCS 6-7 */ 223 { 2925, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 }, 224 { 3250, 7, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 }, 225 226 /* 11ac reserved index */ 227 { 1350, 6, RX_ENC_HT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_40 }, 228 229 /* 11ac 80 MHz 400ns SGI MCS 8-9 */ 230 { 3900, 8, RX_ENC_VHT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 }, 231 { 4333, 9, RX_ENC_VHT, RX_ENC_FLAG_SHORT_GI, RATE_INFO_BW_80 }, 232}; 233 234int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb) 235{ 236 struct ieee80211_rx_status status; 237 const struct wcn36xx_rate *rate; 238 struct ieee80211_hdr *hdr; 239 struct wcn36xx_rx_bd *bd; 240 u16 fc, sn; 241 242 /* 243 * All fields must be 0, otherwise it can lead to 244 * unexpected consequences. 245 */ 246 memset(&status, 0, sizeof(status)); 247 248 bd = (struct wcn36xx_rx_bd *)skb->data; 249 buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32)); 250 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, 251 "BD <<< ", (char *)bd, 252 sizeof(struct wcn36xx_rx_bd)); 253 254 skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len); 255 skb_pull(skb, bd->pdu.mpdu_header_off); 256 257 hdr = (struct ieee80211_hdr *) skb->data; 258 fc = __le16_to_cpu(hdr->frame_control); 259 sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)); 260 261 status.mactime = 10; 262 status.signal = -get_rssi0(bd); 263 status.antenna = 1; 264 status.flag = 0; 265 status.rx_flags = 0; 266 status.flag |= RX_FLAG_IV_STRIPPED | 267 RX_FLAG_MMIC_STRIPPED | 268 RX_FLAG_DECRYPTED; 269 270 wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x\n", status.flag); 271 272 if (bd->scan_learn) { 273 /* If packet originate from hardware scanning, extract the 274 * band/channel from bd descriptor. 275 */ 276 u8 hwch = (bd->reserved0 << 4) + bd->rx_ch; 277 278 if (bd->rf_band != 1 && hwch <= sizeof(ab_rx_ch_map) && hwch >= 1) { 279 status.band = NL80211_BAND_5GHZ; 280 status.freq = ieee80211_channel_to_frequency(ab_rx_ch_map[hwch - 1], 281 status.band); 282 } else { 283 status.band = NL80211_BAND_2GHZ; 284 status.freq = ieee80211_channel_to_frequency(hwch, status.band); 285 } 286 } else { 287 status.band = WCN36XX_BAND(wcn); 288 status.freq = WCN36XX_CENTER_FREQ(wcn); 289 } 290 291 if (bd->rate_id < ARRAY_SIZE(wcn36xx_rate_table)) { 292 rate = &wcn36xx_rate_table[bd->rate_id]; 293 status.encoding = rate->encoding; 294 status.enc_flags = rate->encoding_flags; 295 status.bw = rate->bw; 296 status.rate_idx = rate->mcs_or_legacy_index; 297 status.nss = 1; 298 299 if (status.band == NL80211_BAND_5GHZ && 300 status.encoding == RX_ENC_LEGACY && 301 status.rate_idx >= 4) { 302 /* no dsss rates in 5Ghz rates table */ 303 status.rate_idx -= 4; 304 } 305 } else { 306 status.encoding = 0; 307 status.bw = 0; 308 status.enc_flags = 0; 309 status.rate_idx = 0; 310 } 311 312 if (ieee80211_is_beacon(hdr->frame_control) || 313 ieee80211_is_probe_resp(hdr->frame_control)) 314 status.boottime_ns = ktime_get_boottime_ns(); 315 316 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); 317 318 if (ieee80211_is_beacon(hdr->frame_control)) { 319 wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n", 320 skb, skb->len, fc, sn); 321 wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ", 322 (char *)skb->data, skb->len); 323 } else { 324 wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n", 325 skb, skb->len, fc, sn); 326 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ", 327 (char *)skb->data, skb->len); 328 } 329 330 ieee80211_rx_irqsafe(wcn->hw, skb); 331 332 return 0; 333} 334 335static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd, 336 u32 mpdu_header_len, 337 u32 len, 338 u16 tid) 339{ 340 bd->pdu.mpdu_header_len = mpdu_header_len; 341 bd->pdu.mpdu_header_off = sizeof(*bd); 342 bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len + 343 bd->pdu.mpdu_header_off; 344 bd->pdu.mpdu_len = len; 345 bd->pdu.tid = tid; 346} 347 348static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn, 349 u8 *addr) 350{ 351 struct wcn36xx_vif *vif_priv = NULL; 352 struct ieee80211_vif *vif = NULL; 353 list_for_each_entry(vif_priv, &wcn->vif_list, list) { 354 vif = wcn36xx_priv_to_vif(vif_priv); 355 if (memcmp(vif->addr, addr, ETH_ALEN) == 0) 356 return vif_priv; 357 } 358 wcn36xx_warn("vif %pM not found\n", addr); 359 return NULL; 360} 361 362static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn, 363 struct wcn36xx_sta *sta_priv, 364 struct sk_buff *skb) 365{ 366 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 367 struct ieee80211_sta *sta; 368 u8 *qc, tid; 369 370 if (!conf_is_ht(&wcn->hw->conf)) 371 return; 372 373 sta = wcn36xx_priv_to_sta(sta_priv); 374 375 if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) 376 return; 377 378 if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO) 379 return; 380 381 qc = ieee80211_get_qos_ctl(hdr); 382 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 383 384 spin_lock(&sta_priv->ampdu_lock); 385 if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE) 386 goto out_unlock; 387 388 if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) { 389 sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START; 390 sta_priv->non_agg_frame_ct = 0; 391 ieee80211_start_tx_ba_session(sta, tid, 0); 392 } 393out_unlock: 394 spin_unlock(&sta_priv->ampdu_lock); 395} 396 397static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd, 398 struct wcn36xx *wcn, 399 struct wcn36xx_vif **vif_priv, 400 struct wcn36xx_sta *sta_priv, 401 struct sk_buff *skb, 402 bool bcast) 403{ 404 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 405 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 406 struct ieee80211_vif *vif = NULL; 407 struct wcn36xx_vif *__vif_priv = NULL; 408 bool is_data_qos = ieee80211_is_data_qos(hdr->frame_control); 409 u16 tid = 0; 410 411 bd->bd_rate = WCN36XX_BD_RATE_DATA; 412 413 /* 414 * For not unicast frames mac80211 will not set sta pointer so use 415 * self_sta_index instead. 416 */ 417 if (sta_priv) { 418 __vif_priv = sta_priv->vif; 419 vif = wcn36xx_priv_to_vif(__vif_priv); 420 421 bd->dpu_sign = sta_priv->ucast_dpu_sign; 422 if (vif->type == NL80211_IFTYPE_STATION) { 423 bd->sta_index = sta_priv->bss_sta_index; 424 bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index; 425 } else if (vif->type == NL80211_IFTYPE_AP || 426 vif->type == NL80211_IFTYPE_ADHOC || 427 vif->type == NL80211_IFTYPE_MESH_POINT) { 428 bd->sta_index = sta_priv->sta_index; 429 bd->dpu_desc_idx = sta_priv->dpu_desc_index; 430 } 431 } else { 432 __vif_priv = get_vif_by_addr(wcn, hdr->addr2); 433 bd->sta_index = __vif_priv->self_sta_index; 434 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index; 435 bd->dpu_sign = __vif_priv->self_ucast_dpu_sign; 436 } 437 438 if (is_data_qos) { 439 tid = ieee80211_get_tid(hdr); 440 /* TID->QID is one-to-one mapping */ 441 bd->queue_id = tid; 442 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS; 443 } else { 444 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS; 445 } 446 447 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT || 448 (sta_priv && !sta_priv->is_data_encrypted)) { 449 bd->dpu_ne = 1; 450 } 451 452 if (ieee80211_is_any_nullfunc(hdr->frame_control)) { 453 /* Don't use a regular queue for null packet (no ampdu) */ 454 bd->queue_id = WCN36XX_TX_U_WQ_ID; 455 bd->bd_rate = WCN36XX_BD_RATE_CTRL; 456 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 457 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_HOST; 458 } 459 460 if (bcast) { 461 bd->ub = 1; 462 bd->ack_policy = 1; 463 } 464 *vif_priv = __vif_priv; 465 466 wcn36xx_set_tx_pdu(bd, 467 is_data_qos ? 468 sizeof(struct ieee80211_qos_hdr) : 469 sizeof(struct ieee80211_hdr_3addr), 470 skb->len, tid); 471 472 if (sta_priv && is_data_qos) 473 wcn36xx_tx_start_ampdu(wcn, sta_priv, skb); 474} 475 476static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd, 477 struct wcn36xx *wcn, 478 struct wcn36xx_vif **vif_priv, 479 struct sk_buff *skb, 480 bool bcast) 481{ 482 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 483 struct wcn36xx_vif *__vif_priv = 484 get_vif_by_addr(wcn, hdr->addr2); 485 bd->sta_index = __vif_priv->self_sta_index; 486 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index; 487 bd->dpu_ne = 1; 488 489 /* default rate for unicast */ 490 if (ieee80211_is_mgmt(hdr->frame_control)) 491 bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ? 492 WCN36XX_BD_RATE_CTRL : 493 WCN36XX_BD_RATE_MGMT; 494 else if (ieee80211_is_ctl(hdr->frame_control)) 495 bd->bd_rate = WCN36XX_BD_RATE_CTRL; 496 else 497 wcn36xx_warn("frame control type unknown\n"); 498 499 /* 500 * In joining state trick hardware that probe is sent as 501 * unicast even if address is broadcast. 502 */ 503 if (__vif_priv->is_joining && 504 ieee80211_is_probe_req(hdr->frame_control)) 505 bcast = false; 506 507 if (bcast) { 508 /* broadcast */ 509 bd->ub = 1; 510 /* No ack needed not unicast */ 511 bd->ack_policy = 1; 512 bd->queue_id = WCN36XX_TX_B_WQ_ID; 513 } else 514 bd->queue_id = WCN36XX_TX_U_WQ_ID; 515 *vif_priv = __vif_priv; 516 517 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS; 518 519 wcn36xx_set_tx_pdu(bd, 520 ieee80211_is_data_qos(hdr->frame_control) ? 521 sizeof(struct ieee80211_qos_hdr) : 522 sizeof(struct ieee80211_hdr_3addr), 523 skb->len, WCN36XX_TID); 524} 525 526int wcn36xx_start_tx(struct wcn36xx *wcn, 527 struct wcn36xx_sta *sta_priv, 528 struct sk_buff *skb) 529{ 530 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 531 struct wcn36xx_vif *vif_priv = NULL; 532 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 533 bool is_low = ieee80211_is_data(hdr->frame_control); 534 bool bcast = is_broadcast_ether_addr(hdr->addr1) || 535 is_multicast_ether_addr(hdr->addr1); 536 bool ack_ind = (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) && 537 !(info->flags & IEEE80211_TX_CTL_NO_ACK); 538 struct wcn36xx_tx_bd bd; 539 int ret; 540 541 memset(&bd, 0, sizeof(bd)); 542 543 wcn36xx_dbg(WCN36XX_DBG_TX, 544 "tx skb %p len %d fc %04x sn %d %s %s\n", 545 skb, skb->len, __le16_to_cpu(hdr->frame_control), 546 IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)), 547 is_low ? "low" : "high", bcast ? "bcast" : "ucast"); 548 549 wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len); 550 551 bd.dpu_rf = WCN36XX_BMU_WQ_TX; 552 553 if (unlikely(ack_ind)) { 554 wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n"); 555 556 /* Only one at a time is supported by fw. Stop the TX queues 557 * until the ack status gets back. 558 */ 559 ieee80211_stop_queues(wcn->hw); 560 561 /* Request ack indication from the firmware */ 562 bd.tx_comp = 1; 563 } 564 565 /* Data frames served first*/ 566 if (is_low) 567 wcn36xx_set_tx_data(&bd, wcn, &vif_priv, sta_priv, skb, bcast); 568 else 569 /* MGMT and CTRL frames are handeld here*/ 570 wcn36xx_set_tx_mgmt(&bd, wcn, &vif_priv, skb, bcast); 571 572 buff_to_be((u32 *)&bd, sizeof(bd)/sizeof(u32)); 573 bd.tx_bd_sign = 0xbdbdbdbd; 574 575 ret = wcn36xx_dxe_tx_frame(wcn, vif_priv, &bd, skb, is_low); 576 if (unlikely(ret && ack_ind)) { 577 /* If the skb has not been transmitted, resume TX queue */ 578 ieee80211_wake_queues(wcn->hw); 579 } 580 581 return ret; 582} 583