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 <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 used 41 * 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 to 316 * unexpected consequences. 317 */ 318 memset(&status, 0, sizeof(status)); 319 320 bd = (struct wcn36xx_rx_bd *)skb->data; 321 buff_to_be((u32 *)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 the 366 * 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 use 538 * 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 else 620 wcn36xx_warn("frame control type unknown\n"); 621 622 /* 623 * In joining state trick hardware that probe is sent as 624 * 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 } else 637 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 queues 680 * 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 else 692 /* MGMT and CTRL frames are handeld here*/ 693 wcn36xx_set_tx_mgmt(&bd, wcn, &vif_priv, skb, bcast); 694 695 buff_to_be((u32 *)&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