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 21 static inline int get_rssi0(struct wcn36xx_rx_bd *bd) 22 { 23 return 100 - ((bd->phy_stat0 >> 24) & 0xff); 24 } 25 26 struct 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 */ 37 static 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 41 static 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 }; 233 234 static struct sk_buff *wcn36xx_unchain_msdu(struct sk_buff_head *amsdu) 235 { 236 struct sk_buff *skb, *first; 237 int total_len = 0; 238 int space; 239 240 first = __skb_dequeue(amsdu); 241 242 skb_queue_walk(amsdu, skb) 243 total_len += skb->len; 244 245 space = total_len - skb_tailroom(first); 246 if (space > 0 && pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0) { 247 __skb_queue_head(amsdu, first); 248 return NULL; 249 } 250 251 /* Walk list again, copying contents into msdu_head */ 252 while ((skb = __skb_dequeue(amsdu))) { 253 skb_copy_from_linear_data(skb, skb_put(first, skb->len), 254 skb->len); 255 dev_kfree_skb_irq(skb); 256 } 257 258 return first; 259 } 260 261 static void __skb_queue_purge_irq(struct sk_buff_head *list) 262 { 263 struct sk_buff *skb; 264 265 while ((skb = __skb_dequeue(list)) != NULL) 266 dev_kfree_skb_irq(skb); 267 } 268 269 int wcn36xx_rx_skb(struct wcn36xx *wcn, struct sk_buff *skb) 270 { 271 struct ieee80211_rx_status status; 272 const struct wcn36xx_rate *rate; 273 struct ieee80211_hdr *hdr; 274 struct wcn36xx_rx_bd *bd; 275 struct ieee80211_supported_band *sband; 276 u16 fc, sn; 277 278 /* 279 * All fields must be 0, otherwise it can lead to 280 * unexpected consequences. 281 */ 282 memset(&status, 0, sizeof(status)); 283 284 bd = (struct wcn36xx_rx_bd *)skb->data; 285 buff_to_be((u32 *)bd, sizeof(*bd)/sizeof(u32)); 286 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, 287 "BD <<< ", (char *)bd, 288 sizeof(struct wcn36xx_rx_bd)); 289 290 if (bd->pdu.mpdu_data_off <= bd->pdu.mpdu_header_off || 291 bd->pdu.mpdu_len < bd->pdu.mpdu_header_len) 292 goto drop; 293 294 if (bd->asf && !bd->esf) { /* chained A-MSDU chunks */ 295 /* Sanity check */ 296 if (bd->pdu.mpdu_data_off + bd->pdu.mpdu_len > WCN36XX_PKT_SIZE) 297 goto drop; 298 299 skb_put(skb, bd->pdu.mpdu_data_off + bd->pdu.mpdu_len); 300 skb_pull(skb, bd->pdu.mpdu_data_off); 301 302 /* Only set status for first chained BD (with mac header) */ 303 goto done; 304 } 305 306 if (bd->pdu.mpdu_header_off < sizeof(*bd) || 307 bd->pdu.mpdu_header_off + bd->pdu.mpdu_len > WCN36XX_PKT_SIZE) 308 goto drop; 309 310 skb_put(skb, bd->pdu.mpdu_header_off + bd->pdu.mpdu_len); 311 skb_pull(skb, bd->pdu.mpdu_header_off); 312 313 hdr = (struct ieee80211_hdr *) skb->data; 314 fc = __le16_to_cpu(hdr->frame_control); 315 sn = IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)); 316 317 status.freq = WCN36XX_CENTER_FREQ(wcn); 318 status.band = WCN36XX_BAND(wcn); 319 status.mactime = 10; 320 status.signal = -get_rssi0(bd); 321 status.antenna = 1; 322 status.flag = 0; 323 status.rx_flags = 0; 324 status.flag |= RX_FLAG_IV_STRIPPED | 325 RX_FLAG_MMIC_STRIPPED | 326 RX_FLAG_DECRYPTED; 327 328 wcn36xx_dbg(WCN36XX_DBG_RX, "status.flags=%x\n", status.flag); 329 330 if (bd->rate_id < ARRAY_SIZE(wcn36xx_rate_table)) { 331 rate = &wcn36xx_rate_table[bd->rate_id]; 332 status.encoding = rate->encoding; 333 status.enc_flags = rate->encoding_flags; 334 status.bw = rate->bw; 335 status.rate_idx = rate->mcs_or_legacy_index; 336 sband = wcn->hw->wiphy->bands[status.band]; 337 status.nss = 1; 338 339 if (status.band == NL80211_BAND_5GHZ && 340 status.encoding == RX_ENC_LEGACY && 341 status.rate_idx >= sband->n_bitrates) { 342 /* no dsss rates in 5Ghz rates table */ 343 status.rate_idx -= 4; 344 } 345 } else { 346 status.encoding = 0; 347 status.bw = 0; 348 status.enc_flags = 0; 349 status.rate_idx = 0; 350 } 351 352 if (ieee80211_is_beacon(hdr->frame_control) || 353 ieee80211_is_probe_resp(hdr->frame_control)) 354 status.boottime_ns = ktime_get_boottime_ns(); 355 356 if (bd->scan_learn) { 357 /* If packet originates from hardware scanning, extract the 358 * band/channel from bd descriptor. 359 */ 360 u8 hwch = (bd->reserved0 << 4) + bd->rx_ch; 361 362 if (bd->rf_band != 1 && hwch <= sizeof(ab_rx_ch_map) && hwch >= 1) { 363 status.band = NL80211_BAND_5GHZ; 364 status.freq = ieee80211_channel_to_frequency(ab_rx_ch_map[hwch - 1], 365 status.band); 366 } else { 367 status.band = NL80211_BAND_2GHZ; 368 status.freq = ieee80211_channel_to_frequency(hwch, status.band); 369 } 370 } 371 372 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status)); 373 374 if (ieee80211_is_beacon(hdr->frame_control)) { 375 wcn36xx_dbg(WCN36XX_DBG_BEACON, "beacon skb %p len %d fc %04x sn %d\n", 376 skb, skb->len, fc, sn); 377 wcn36xx_dbg_dump(WCN36XX_DBG_BEACON_DUMP, "SKB <<< ", 378 (char *)skb->data, skb->len); 379 } else { 380 wcn36xx_dbg(WCN36XX_DBG_RX, "rx skb %p len %d fc %04x sn %d\n", 381 skb, skb->len, fc, sn); 382 wcn36xx_dbg_dump(WCN36XX_DBG_RX_DUMP, "SKB <<< ", 383 (char *)skb->data, skb->len); 384 } 385 386 done: 387 /* Chained AMSDU ? slow path */ 388 if (unlikely(bd->asf && !(bd->lsf && bd->esf))) { 389 if (bd->esf && !skb_queue_empty(&wcn->amsdu)) { 390 wcn36xx_err("Discarding non complete chain"); 391 __skb_queue_purge_irq(&wcn->amsdu); 392 } 393 394 __skb_queue_tail(&wcn->amsdu, skb); 395 396 if (!bd->lsf) 397 return 0; /* Not the last AMSDU, wait for more */ 398 399 skb = wcn36xx_unchain_msdu(&wcn->amsdu); 400 if (!skb) 401 goto drop; 402 } 403 404 ieee80211_rx_irqsafe(wcn->hw, skb); 405 406 return 0; 407 408 drop: /* drop everything */ 409 wcn36xx_err("Drop frame! skb:%p len:%u hoff:%u doff:%u asf=%u esf=%u lsf=%u\n", 410 skb, bd->pdu.mpdu_len, bd->pdu.mpdu_header_off, 411 bd->pdu.mpdu_data_off, bd->asf, bd->esf, bd->lsf); 412 413 dev_kfree_skb_irq(skb); 414 __skb_queue_purge_irq(&wcn->amsdu); 415 416 return -EINVAL; 417 } 418 419 static void wcn36xx_set_tx_pdu(struct wcn36xx_tx_bd *bd, 420 u32 mpdu_header_len, 421 u32 len, 422 u16 tid) 423 { 424 bd->pdu.mpdu_header_len = mpdu_header_len; 425 bd->pdu.mpdu_header_off = sizeof(*bd); 426 bd->pdu.mpdu_data_off = bd->pdu.mpdu_header_len + 427 bd->pdu.mpdu_header_off; 428 bd->pdu.mpdu_len = len; 429 bd->pdu.tid = tid; 430 } 431 432 static inline struct wcn36xx_vif *get_vif_by_addr(struct wcn36xx *wcn, 433 u8 *addr) 434 { 435 struct wcn36xx_vif *vif_priv = NULL; 436 struct ieee80211_vif *vif = NULL; 437 list_for_each_entry(vif_priv, &wcn->vif_list, list) { 438 vif = wcn36xx_priv_to_vif(vif_priv); 439 if (memcmp(vif->addr, addr, ETH_ALEN) == 0) 440 return vif_priv; 441 } 442 wcn36xx_warn("vif %pM not found\n", addr); 443 return NULL; 444 } 445 446 static void wcn36xx_tx_start_ampdu(struct wcn36xx *wcn, 447 struct wcn36xx_sta *sta_priv, 448 struct sk_buff *skb) 449 { 450 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 451 struct ieee80211_sta *sta; 452 u8 *qc, tid; 453 454 if (!conf_is_ht(&wcn->hw->conf)) 455 return; 456 457 sta = wcn36xx_priv_to_sta(sta_priv); 458 459 if (WARN_ON(!ieee80211_is_data_qos(hdr->frame_control))) 460 return; 461 462 if (skb_get_queue_mapping(skb) == IEEE80211_AC_VO) 463 return; 464 465 qc = ieee80211_get_qos_ctl(hdr); 466 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 467 468 spin_lock(&sta_priv->ampdu_lock); 469 if (sta_priv->ampdu_state[tid] != WCN36XX_AMPDU_NONE) 470 goto out_unlock; 471 472 if (sta_priv->non_agg_frame_ct++ >= WCN36XX_AMPDU_START_THRESH) { 473 sta_priv->ampdu_state[tid] = WCN36XX_AMPDU_START; 474 sta_priv->non_agg_frame_ct = 0; 475 ieee80211_start_tx_ba_session(sta, tid, 0); 476 } 477 out_unlock: 478 spin_unlock(&sta_priv->ampdu_lock); 479 } 480 481 static void wcn36xx_set_tx_data(struct wcn36xx_tx_bd *bd, 482 struct wcn36xx *wcn, 483 struct wcn36xx_vif **vif_priv, 484 struct wcn36xx_sta *sta_priv, 485 struct sk_buff *skb, 486 bool bcast) 487 { 488 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 489 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 490 struct ieee80211_vif *vif = NULL; 491 struct wcn36xx_vif *__vif_priv = NULL; 492 bool is_data_qos = ieee80211_is_data_qos(hdr->frame_control); 493 u16 tid = 0; 494 495 bd->bd_rate = WCN36XX_BD_RATE_DATA; 496 497 /* 498 * For not unicast frames mac80211 will not set sta pointer so use 499 * self_sta_index instead. 500 */ 501 if (sta_priv) { 502 __vif_priv = sta_priv->vif; 503 vif = wcn36xx_priv_to_vif(__vif_priv); 504 505 bd->dpu_sign = sta_priv->ucast_dpu_sign; 506 if (vif->type == NL80211_IFTYPE_STATION) { 507 bd->sta_index = sta_priv->bss_sta_index; 508 bd->dpu_desc_idx = sta_priv->bss_dpu_desc_index; 509 } else if (vif->type == NL80211_IFTYPE_AP || 510 vif->type == NL80211_IFTYPE_ADHOC || 511 vif->type == NL80211_IFTYPE_MESH_POINT) { 512 bd->sta_index = sta_priv->sta_index; 513 bd->dpu_desc_idx = sta_priv->dpu_desc_index; 514 } 515 } else { 516 __vif_priv = get_vif_by_addr(wcn, hdr->addr2); 517 bd->sta_index = __vif_priv->self_sta_index; 518 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index; 519 bd->dpu_sign = __vif_priv->self_ucast_dpu_sign; 520 } 521 522 if (is_data_qos) { 523 tid = ieee80211_get_tid(hdr); 524 /* TID->QID is one-to-one mapping */ 525 bd->queue_id = tid; 526 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_QOS; 527 } else { 528 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS; 529 } 530 531 if (info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT || 532 (sta_priv && !sta_priv->is_data_encrypted)) { 533 bd->dpu_ne = 1; 534 } 535 536 if (ieee80211_is_any_nullfunc(hdr->frame_control)) { 537 /* Don't use a regular queue for null packet (no ampdu) */ 538 bd->queue_id = WCN36XX_TX_U_WQ_ID; 539 bd->bd_rate = WCN36XX_BD_RATE_CTRL; 540 if (ieee80211_is_qos_nullfunc(hdr->frame_control)) 541 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_HOST; 542 } 543 544 if (bcast) { 545 bd->ub = 1; 546 bd->ack_policy = 1; 547 } 548 *vif_priv = __vif_priv; 549 550 wcn36xx_set_tx_pdu(bd, 551 is_data_qos ? 552 sizeof(struct ieee80211_qos_hdr) : 553 sizeof(struct ieee80211_hdr_3addr), 554 skb->len, tid); 555 556 if (sta_priv && is_data_qos) 557 wcn36xx_tx_start_ampdu(wcn, sta_priv, skb); 558 } 559 560 static void wcn36xx_set_tx_mgmt(struct wcn36xx_tx_bd *bd, 561 struct wcn36xx *wcn, 562 struct wcn36xx_vif **vif_priv, 563 struct sk_buff *skb, 564 bool bcast) 565 { 566 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 567 struct wcn36xx_vif *__vif_priv = 568 get_vif_by_addr(wcn, hdr->addr2); 569 bd->sta_index = __vif_priv->self_sta_index; 570 bd->dpu_desc_idx = __vif_priv->self_dpu_desc_index; 571 bd->dpu_ne = 1; 572 573 /* default rate for unicast */ 574 if (ieee80211_is_mgmt(hdr->frame_control)) 575 bd->bd_rate = (WCN36XX_BAND(wcn) == NL80211_BAND_5GHZ) ? 576 WCN36XX_BD_RATE_CTRL : 577 WCN36XX_BD_RATE_MGMT; 578 else if (ieee80211_is_ctl(hdr->frame_control)) 579 bd->bd_rate = WCN36XX_BD_RATE_CTRL; 580 else 581 wcn36xx_warn("frame control type unknown\n"); 582 583 /* 584 * In joining state trick hardware that probe is sent as 585 * unicast even if address is broadcast. 586 */ 587 if (__vif_priv->is_joining && 588 ieee80211_is_probe_req(hdr->frame_control)) 589 bcast = false; 590 591 if (bcast) { 592 /* broadcast */ 593 bd->ub = 1; 594 /* No ack needed not unicast */ 595 bd->ack_policy = 1; 596 bd->queue_id = WCN36XX_TX_B_WQ_ID; 597 } else 598 bd->queue_id = WCN36XX_TX_U_WQ_ID; 599 *vif_priv = __vif_priv; 600 601 bd->pdu.bd_ssn = WCN36XX_TXBD_SSN_FILL_DPU_NON_QOS; 602 603 wcn36xx_set_tx_pdu(bd, 604 ieee80211_is_data_qos(hdr->frame_control) ? 605 sizeof(struct ieee80211_qos_hdr) : 606 sizeof(struct ieee80211_hdr_3addr), 607 skb->len, WCN36XX_TID); 608 } 609 610 int wcn36xx_start_tx(struct wcn36xx *wcn, 611 struct wcn36xx_sta *sta_priv, 612 struct sk_buff *skb) 613 { 614 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 615 struct wcn36xx_vif *vif_priv = NULL; 616 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 617 bool is_low = ieee80211_is_data(hdr->frame_control); 618 bool bcast = is_broadcast_ether_addr(hdr->addr1) || 619 is_multicast_ether_addr(hdr->addr1); 620 bool ack_ind = (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS) && 621 !(info->flags & IEEE80211_TX_CTL_NO_ACK); 622 struct wcn36xx_tx_bd bd; 623 int ret; 624 625 memset(&bd, 0, sizeof(bd)); 626 627 wcn36xx_dbg(WCN36XX_DBG_TX, 628 "tx skb %p len %d fc %04x sn %d %s %s\n", 629 skb, skb->len, __le16_to_cpu(hdr->frame_control), 630 IEEE80211_SEQ_TO_SN(__le16_to_cpu(hdr->seq_ctrl)), 631 is_low ? "low" : "high", bcast ? "bcast" : "ucast"); 632 633 wcn36xx_dbg_dump(WCN36XX_DBG_TX_DUMP, "", skb->data, skb->len); 634 635 bd.dpu_rf = WCN36XX_BMU_WQ_TX; 636 637 if (unlikely(ack_ind)) { 638 wcn36xx_dbg(WCN36XX_DBG_DXE, "TX_ACK status requested\n"); 639 640 /* Only one at a time is supported by fw. Stop the TX queues 641 * until the ack status gets back. 642 */ 643 ieee80211_stop_queues(wcn->hw); 644 645 /* Request ack indication from the firmware */ 646 bd.tx_comp = 1; 647 } 648 649 /* Data frames served first*/ 650 if (is_low) 651 wcn36xx_set_tx_data(&bd, wcn, &vif_priv, sta_priv, skb, bcast); 652 else 653 /* MGMT and CTRL frames are handeld here*/ 654 wcn36xx_set_tx_mgmt(&bd, wcn, &vif_priv, skb, bcast); 655 656 buff_to_be((u32 *)&bd, sizeof(bd)/sizeof(u32)); 657 bd.tx_bd_sign = 0xbdbdbdbd; 658 659 ret = wcn36xx_dxe_tx_frame(wcn, vif_priv, &bd, skb, is_low); 660 if (unlikely(ret && ack_ind)) { 661 /* If the skb has not been transmitted, resume TX queue */ 662 ieee80211_wake_queues(wcn->hw); 663 } 664 665 return ret; 666 } 667