1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2021 pureLiFi 4 */ 5 6 #include <linux/netdevice.h> 7 #include <linux/etherdevice.h> 8 #include <linux/slab.h> 9 #include <linux/usb.h> 10 #include <linux/jiffies.h> 11 #include <net/ieee80211_radiotap.h> 12 13 #include "chip.h" 14 #include "mac.h" 15 #include "usb.h" 16 17 static const struct ieee80211_rate plfxlc_rates[] = { 18 { .bitrate = 10, 19 .hw_value = PURELIFI_CCK_RATE_1M, 20 .flags = 0 }, 21 { .bitrate = 20, 22 .hw_value = PURELIFI_CCK_RATE_2M, 23 .hw_value_short = PURELIFI_CCK_RATE_2M 24 | PURELIFI_CCK_PREA_SHORT, 25 .flags = IEEE80211_RATE_SHORT_PREAMBLE }, 26 { .bitrate = 55, 27 .hw_value = PURELIFI_CCK_RATE_5_5M, 28 .hw_value_short = PURELIFI_CCK_RATE_5_5M 29 | PURELIFI_CCK_PREA_SHORT, 30 .flags = IEEE80211_RATE_SHORT_PREAMBLE }, 31 { .bitrate = 110, 32 .hw_value = PURELIFI_CCK_RATE_11M, 33 .hw_value_short = PURELIFI_CCK_RATE_11M 34 | PURELIFI_CCK_PREA_SHORT, 35 .flags = IEEE80211_RATE_SHORT_PREAMBLE }, 36 { .bitrate = 60, 37 .hw_value = PURELIFI_OFDM_RATE_6M, 38 .flags = 0 }, 39 { .bitrate = 90, 40 .hw_value = PURELIFI_OFDM_RATE_9M, 41 .flags = 0 }, 42 { .bitrate = 120, 43 .hw_value = PURELIFI_OFDM_RATE_12M, 44 .flags = 0 }, 45 { .bitrate = 180, 46 .hw_value = PURELIFI_OFDM_RATE_18M, 47 .flags = 0 }, 48 { .bitrate = 240, 49 .hw_value = PURELIFI_OFDM_RATE_24M, 50 .flags = 0 }, 51 { .bitrate = 360, 52 .hw_value = PURELIFI_OFDM_RATE_36M, 53 .flags = 0 }, 54 { .bitrate = 480, 55 .hw_value = PURELIFI_OFDM_RATE_48M, 56 .flags = 0 }, 57 { .bitrate = 540, 58 .hw_value = PURELIFI_OFDM_RATE_54M, 59 .flags = 0 } 60 }; 61 62 static const struct ieee80211_channel plfxlc_channels[] = { 63 { .center_freq = 2412, .hw_value = 1 }, 64 { .center_freq = 2417, .hw_value = 2 }, 65 { .center_freq = 2422, .hw_value = 3 }, 66 { .center_freq = 2427, .hw_value = 4 }, 67 { .center_freq = 2432, .hw_value = 5 }, 68 { .center_freq = 2437, .hw_value = 6 }, 69 { .center_freq = 2442, .hw_value = 7 }, 70 { .center_freq = 2447, .hw_value = 8 }, 71 { .center_freq = 2452, .hw_value = 9 }, 72 { .center_freq = 2457, .hw_value = 10 }, 73 { .center_freq = 2462, .hw_value = 11 }, 74 { .center_freq = 2467, .hw_value = 12 }, 75 { .center_freq = 2472, .hw_value = 13 }, 76 { .center_freq = 2484, .hw_value = 14 }, 77 }; 78 79 int plfxlc_mac_preinit_hw(struct ieee80211_hw *hw, const u8 *hw_address) 80 { 81 SET_IEEE80211_PERM_ADDR(hw, hw_address); 82 return 0; 83 } 84 85 int plfxlc_mac_init_hw(struct ieee80211_hw *hw) 86 { 87 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 88 struct plfxlc_chip *chip = &mac->chip; 89 int r; 90 91 r = plfxlc_chip_init_hw(chip); 92 if (r) { 93 dev_warn(plfxlc_mac_dev(mac), "init hw failed (%d)\n", r); 94 return r; 95 } 96 97 dev_dbg(plfxlc_mac_dev(mac), "irq_disabled (%d)\n", irqs_disabled()); 98 regulatory_hint(hw->wiphy, "00"); 99 return r; 100 } 101 102 void plfxlc_mac_release(struct plfxlc_mac *mac) 103 { 104 plfxlc_chip_release(&mac->chip); 105 } 106 107 int plfxlc_op_start(struct ieee80211_hw *hw) 108 { 109 plfxlc_hw_mac(hw)->chip.usb.initialized = 1; 110 return 0; 111 } 112 113 void plfxlc_op_stop(struct ieee80211_hw *hw, bool suspend) 114 { 115 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 116 117 clear_bit(PURELIFI_DEVICE_RUNNING, &mac->flags); 118 } 119 120 int plfxlc_restore_settings(struct plfxlc_mac *mac) 121 { 122 int beacon_interval, beacon_period; 123 struct sk_buff *beacon; 124 125 spin_lock_irq(&mac->lock); 126 beacon_interval = mac->beacon.interval; 127 beacon_period = mac->beacon.period; 128 spin_unlock_irq(&mac->lock); 129 130 if (mac->type != NL80211_IFTYPE_ADHOC) 131 return 0; 132 133 if (mac->vif) { 134 beacon = ieee80211_beacon_get(mac->hw, mac->vif, 0); 135 if (beacon) { 136 /*beacon is hardcoded in firmware */ 137 kfree_skb(beacon); 138 /* Returned skb is used only once and lowlevel 139 * driver is responsible for freeing it. 140 */ 141 } 142 } 143 144 plfxlc_set_beacon_interval(&mac->chip, beacon_interval, 145 beacon_period, mac->type); 146 147 spin_lock_irq(&mac->lock); 148 mac->beacon.last_update = jiffies; 149 spin_unlock_irq(&mac->lock); 150 151 return 0; 152 } 153 154 static void plfxlc_mac_tx_status(struct ieee80211_hw *hw, 155 struct sk_buff *skb, 156 int ackssi, 157 struct tx_status *tx_status) 158 { 159 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 160 int success = 1; 161 162 ieee80211_tx_info_clear_status(info); 163 if (tx_status) 164 success = !tx_status->failure; 165 166 if (success) 167 info->flags |= IEEE80211_TX_STAT_ACK; 168 else 169 info->flags &= ~IEEE80211_TX_STAT_ACK; 170 171 info->status.ack_signal = 50; 172 ieee80211_tx_status_irqsafe(hw, skb); 173 } 174 175 void plfxlc_mac_tx_to_dev(struct sk_buff *skb, int error) 176 { 177 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 178 struct ieee80211_hw *hw = info->rate_driver_data[0]; 179 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 180 struct sk_buff_head *q = NULL; 181 182 ieee80211_tx_info_clear_status(info); 183 skb_pull(skb, sizeof(struct plfxlc_ctrlset)); 184 185 if (unlikely(error || 186 (info->flags & IEEE80211_TX_CTL_NO_ACK))) { 187 ieee80211_tx_status_irqsafe(hw, skb); 188 return; 189 } 190 191 q = &mac->ack_wait_queue; 192 193 skb_queue_tail(q, skb); 194 while (skb_queue_len(q)/* > PURELIFI_MAC_MAX_ACK_WAITERS*/) { 195 plfxlc_mac_tx_status(hw, skb_dequeue(q), 196 mac->ack_pending ? 197 mac->ack_signal : 0, 198 NULL); 199 mac->ack_pending = 0; 200 } 201 } 202 203 static int plfxlc_fill_ctrlset(struct plfxlc_mac *mac, struct sk_buff *skb) 204 { 205 unsigned int frag_len = skb->len; 206 struct plfxlc_ctrlset *cs; 207 u32 temp_payload_len = 0; 208 unsigned int tmp; 209 u32 temp_len = 0; 210 211 if (skb_headroom(skb) < sizeof(struct plfxlc_ctrlset)) { 212 dev_dbg(plfxlc_mac_dev(mac), "Not enough hroom(1)\n"); 213 return 1; 214 } 215 216 cs = (void *)skb_push(skb, sizeof(struct plfxlc_ctrlset)); 217 temp_payload_len = frag_len; 218 temp_len = temp_payload_len + 219 sizeof(struct plfxlc_ctrlset) - 220 sizeof(cs->id) - sizeof(cs->len); 221 222 /* Data packet lengths must be multiple of four bytes and must 223 * not be a multiple of 512 bytes. First, it is attempted to 224 * append the data packet in the tailroom of the skb. In rare 225 * occasions, the tailroom is too small. In this case, the 226 * content of the packet is shifted into the headroom of the skb 227 * by memcpy. Headroom is allocated at startup (below in this 228 * file). Therefore, there will be always enough headroom. The 229 * call skb_headroom is an additional safety which might be 230 * dropped. 231 */ 232 /* check if 32 bit aligned and align data */ 233 tmp = skb->len & 3; 234 if (tmp) { 235 if (skb_tailroom(skb) < (3 - tmp)) { 236 if (skb_headroom(skb) >= 4 - tmp) { 237 u8 len; 238 u8 *src_pt; 239 u8 *dest_pt; 240 241 len = skb->len; 242 src_pt = skb->data; 243 dest_pt = skb_push(skb, 4 - tmp); 244 memmove(dest_pt, src_pt, len); 245 } else { 246 return -ENOBUFS; 247 } 248 } else { 249 skb_put(skb, 4 - tmp); 250 } 251 temp_len += 4 - tmp; 252 } 253 254 /* check if not multiple of 512 and align data */ 255 tmp = skb->len & 0x1ff; 256 if (!tmp) { 257 if (skb_tailroom(skb) < 4) { 258 if (skb_headroom(skb) >= 4) { 259 u8 len = skb->len; 260 u8 *src_pt = skb->data; 261 u8 *dest_pt = skb_push(skb, 4); 262 263 memmove(dest_pt, src_pt, len); 264 } else { 265 /* should never happen because 266 * sufficient headroom was reserved 267 */ 268 return -ENOBUFS; 269 } 270 } else { 271 skb_put(skb, 4); 272 } 273 temp_len += 4; 274 } 275 276 cs->id = cpu_to_be32(USB_REQ_DATA_TX); 277 cs->len = cpu_to_be32(temp_len); 278 cs->payload_len_nw = cpu_to_be32(temp_payload_len); 279 280 return 0; 281 } 282 283 static void plfxlc_op_tx(struct ieee80211_hw *hw, 284 struct ieee80211_tx_control *control, 285 struct sk_buff *skb) 286 { 287 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 288 struct plfxlc_header *plhdr = (void *)skb->data; 289 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 290 struct plfxlc_usb *usb = &mac->chip.usb; 291 unsigned long flags; 292 int r; 293 294 r = plfxlc_fill_ctrlset(mac, skb); 295 if (r) 296 goto fail; 297 298 info->rate_driver_data[0] = hw; 299 300 if (plhdr->frametype == IEEE80211_FTYPE_DATA) { 301 u8 *dst_mac = plhdr->dmac; 302 u8 sidx; 303 bool found = false; 304 struct plfxlc_usb_tx *tx = &usb->tx; 305 306 for (sidx = 0; sidx < MAX_STA_NUM; sidx++) { 307 if (!(tx->station[sidx].flag & STATION_CONNECTED_FLAG)) 308 continue; 309 if (memcmp(tx->station[sidx].mac, dst_mac, ETH_ALEN)) 310 continue; 311 found = true; 312 break; 313 } 314 315 /* Default to broadcast address for unknown MACs */ 316 if (!found) 317 sidx = STA_BROADCAST_INDEX; 318 319 /* Stop OS from sending packets, if the queue is half full */ 320 if (skb_queue_len(&tx->station[sidx].data_list) > 60) 321 ieee80211_stop_queues(plfxlc_usb_to_hw(usb)); 322 323 /* Schedule packet for transmission if queue is not full */ 324 if (skb_queue_len(&tx->station[sidx].data_list) > 256) 325 goto fail; 326 skb_queue_tail(&tx->station[sidx].data_list, skb); 327 plfxlc_send_packet_from_data_queue(usb); 328 329 } else { 330 spin_lock_irqsave(&usb->tx.lock, flags); 331 r = plfxlc_usb_wreq_async(&mac->chip.usb, skb->data, skb->len, 332 USB_REQ_DATA_TX, plfxlc_tx_urb_complete, skb); 333 spin_unlock_irqrestore(&usb->tx.lock, flags); 334 if (r) 335 goto fail; 336 } 337 return; 338 339 fail: 340 dev_kfree_skb(skb); 341 } 342 343 static int plfxlc_filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, 344 struct ieee80211_rx_status *stats) 345 { 346 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 347 struct sk_buff_head *q; 348 int i, position = 0; 349 unsigned long flags; 350 struct sk_buff *skb; 351 bool found = false; 352 353 if (!ieee80211_is_ack(rx_hdr->frame_control)) 354 return 0; 355 356 dev_dbg(plfxlc_mac_dev(mac), "ACK Received\n"); 357 358 /* code based on zy driver, this logic may need fix */ 359 q = &mac->ack_wait_queue; 360 spin_lock_irqsave(&q->lock, flags); 361 362 skb_queue_walk(q, skb) { 363 struct ieee80211_hdr *tx_hdr; 364 365 position++; 366 367 if (mac->ack_pending && skb_queue_is_first(q, skb)) 368 continue; 369 if (mac->ack_pending == 0) 370 break; 371 372 tx_hdr = (struct ieee80211_hdr *)skb->data; 373 if (likely(ether_addr_equal(tx_hdr->addr2, rx_hdr->addr1))) { 374 found = 1; 375 break; 376 } 377 } 378 379 if (found) { 380 for (i = 1; i < position; i++) 381 skb = __skb_dequeue(q); 382 if (i == position) { 383 plfxlc_mac_tx_status(hw, skb, 384 mac->ack_pending ? 385 mac->ack_signal : 0, 386 NULL); 387 mac->ack_pending = 0; 388 } 389 390 mac->ack_pending = skb_queue_len(q) ? 1 : 0; 391 mac->ack_signal = stats->signal; 392 } 393 394 spin_unlock_irqrestore(&q->lock, flags); 395 return 1; 396 } 397 398 int plfxlc_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, 399 unsigned int length) 400 { 401 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 402 struct ieee80211_rx_status stats; 403 const struct rx_status *status; 404 unsigned int payload_length; 405 struct plfxlc_usb_tx *tx; 406 struct sk_buff *skb; 407 int need_padding; 408 __le16 fc; 409 int sidx; 410 411 /* Packet blockade during disabled interface. */ 412 if (!mac->vif) 413 return 0; 414 415 status = (struct rx_status *)buffer; 416 417 memset(&stats, 0, sizeof(stats)); 418 419 stats.flag = 0; 420 stats.freq = 2412; 421 stats.band = NL80211_BAND_LC; 422 mac->rssi = -15 * be16_to_cpu(status->rssi) / 10; 423 424 stats.signal = mac->rssi; 425 426 if (status->rate_idx > 7) 427 stats.rate_idx = 0; 428 else 429 stats.rate_idx = status->rate_idx; 430 431 mac->crc_errors = be64_to_cpu(status->crc_error_count); 432 433 /* TODO bad frame check for CRC error*/ 434 if (plfxlc_filter_ack(hw, (struct ieee80211_hdr *)buffer, &stats) && 435 !mac->pass_ctrl) 436 return 0; 437 438 buffer += sizeof(struct rx_status); 439 payload_length = get_unaligned_be32(buffer); 440 441 if (payload_length > 1560) { 442 dev_err(plfxlc_mac_dev(mac), " > MTU %u\n", payload_length); 443 return 0; 444 } 445 buffer += sizeof(u32); 446 447 fc = get_unaligned((__le16 *)buffer); 448 need_padding = ieee80211_is_data_qos(fc) ^ ieee80211_has_a4(fc); 449 450 tx = &mac->chip.usb.tx; 451 452 for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) { 453 if (memcmp(&buffer[10], tx->station[sidx].mac, ETH_ALEN)) 454 continue; 455 if (tx->station[sidx].flag & STATION_CONNECTED_FLAG) { 456 tx->station[sidx].flag |= STATION_HEARTBEAT_FLAG; 457 break; 458 } 459 } 460 461 if (sidx == MAX_STA_NUM - 1) { 462 for (sidx = 0; sidx < MAX_STA_NUM - 1; sidx++) { 463 if (tx->station[sidx].flag & STATION_CONNECTED_FLAG) 464 continue; 465 memcpy(tx->station[sidx].mac, &buffer[10], ETH_ALEN); 466 tx->station[sidx].flag |= STATION_CONNECTED_FLAG; 467 tx->station[sidx].flag |= STATION_HEARTBEAT_FLAG; 468 break; 469 } 470 } 471 472 switch (buffer[0]) { 473 case IEEE80211_STYPE_PROBE_REQ: 474 dev_dbg(plfxlc_mac_dev(mac), "Probe request\n"); 475 break; 476 case IEEE80211_STYPE_ASSOC_REQ: 477 dev_dbg(plfxlc_mac_dev(mac), "Association request\n"); 478 break; 479 case IEEE80211_STYPE_AUTH: 480 dev_dbg(plfxlc_mac_dev(mac), "Authentication req\n"); 481 break; 482 case IEEE80211_FTYPE_DATA: 483 dev_dbg(plfxlc_mac_dev(mac), "802.11 data frame\n"); 484 break; 485 } 486 487 skb = dev_alloc_skb(payload_length + (need_padding ? 2 : 0)); 488 if (!skb) 489 return -ENOMEM; 490 491 if (need_padding) 492 /* Make sure that the payload data is 4 byte aligned. */ 493 skb_reserve(skb, 2); 494 495 skb_put_data(skb, buffer, payload_length); 496 memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); 497 ieee80211_rx_irqsafe(hw, skb); 498 return 0; 499 } 500 501 static int plfxlc_op_add_interface(struct ieee80211_hw *hw, 502 struct ieee80211_vif *vif) 503 { 504 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 505 static const char * const iftype80211[] = { 506 [NL80211_IFTYPE_STATION] = "Station", 507 [NL80211_IFTYPE_ADHOC] = "Adhoc" 508 }; 509 510 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) 511 return -EOPNOTSUPP; 512 513 if (vif->type == NL80211_IFTYPE_ADHOC || 514 vif->type == NL80211_IFTYPE_STATION) { 515 dev_dbg(plfxlc_mac_dev(mac), "%s %s\n", __func__, 516 iftype80211[vif->type]); 517 mac->type = vif->type; 518 mac->vif = vif; 519 return 0; 520 } 521 dev_dbg(plfxlc_mac_dev(mac), "unsupported iftype\n"); 522 return -EOPNOTSUPP; 523 } 524 525 static void plfxlc_op_remove_interface(struct ieee80211_hw *hw, 526 struct ieee80211_vif *vif) 527 { 528 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 529 530 mac->type = NL80211_IFTYPE_UNSPECIFIED; 531 mac->vif = NULL; 532 } 533 534 static int plfxlc_op_config(struct ieee80211_hw *hw, u32 changed) 535 { 536 return 0; 537 } 538 539 #define SUPPORTED_FIF_FLAGS \ 540 (FIF_ALLMULTI | FIF_FCSFAIL | FIF_CONTROL | \ 541 FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC) 542 static void plfxlc_op_configure_filter(struct ieee80211_hw *hw, 543 unsigned int changed_flags, 544 unsigned int *new_flags, 545 u64 multicast) 546 { 547 struct plfxlc_mc_hash hash = { 548 .low = multicast, 549 .high = multicast >> 32, 550 }; 551 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 552 unsigned long flags; 553 554 /* Only deal with supported flags */ 555 *new_flags &= SUPPORTED_FIF_FLAGS; 556 557 /* If multicast parameter 558 * (as returned by plfxlc_op_prepare_multicast) 559 * has changed, no bit in changed_flags is set. To handle this 560 * situation, we do not return if changed_flags is 0. If we do so, 561 * we will have some issue with IPv6 which uses multicast for link 562 * layer address resolution. 563 */ 564 if (*new_flags & (FIF_ALLMULTI)) 565 plfxlc_mc_add_all(&hash); 566 567 spin_lock_irqsave(&mac->lock, flags); 568 mac->pass_failed_fcs = !!(*new_flags & FIF_FCSFAIL); 569 mac->pass_ctrl = !!(*new_flags & FIF_CONTROL); 570 mac->multicast_hash = hash; 571 spin_unlock_irqrestore(&mac->lock, flags); 572 573 /* no handling required for FIF_OTHER_BSS as we don't currently 574 * do BSSID filtering 575 */ 576 /* FIXME: in future it would be nice to enable the probe response 577 * filter (so that the driver doesn't see them) until 578 * FIF_BCN_PRBRESP_PROMISC is set. however due to atomicity here, we'd 579 * have to schedule work to enable prbresp reception, which might 580 * happen too late. For now we'll just listen and forward them all the 581 * time. 582 */ 583 } 584 585 static void plfxlc_op_bss_info_changed(struct ieee80211_hw *hw, 586 struct ieee80211_vif *vif, 587 struct ieee80211_bss_conf *bss_conf, 588 u64 changes) 589 { 590 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 591 int associated; 592 593 dev_dbg(plfxlc_mac_dev(mac), "changes: %llx\n", changes); 594 595 if (mac->type != NL80211_IFTYPE_ADHOC) { /* for STATION */ 596 associated = is_valid_ether_addr(bss_conf->bssid); 597 goto exit_all; 598 } 599 /* for ADHOC */ 600 associated = true; 601 if (changes & BSS_CHANGED_BEACON) { 602 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif, 0); 603 604 if (beacon) { 605 /*beacon is hardcoded in firmware */ 606 kfree_skb(beacon); 607 /*Returned skb is used only once and 608 * low-level driver is 609 * responsible for freeing it. 610 */ 611 } 612 } 613 614 if (changes & BSS_CHANGED_BEACON_ENABLED) { 615 u16 interval = 0; 616 u8 period = 0; 617 618 if (bss_conf->enable_beacon) { 619 period = bss_conf->dtim_period; 620 interval = bss_conf->beacon_int; 621 } 622 623 spin_lock_irq(&mac->lock); 624 mac->beacon.period = period; 625 mac->beacon.interval = interval; 626 mac->beacon.last_update = jiffies; 627 spin_unlock_irq(&mac->lock); 628 629 plfxlc_set_beacon_interval(&mac->chip, interval, 630 period, mac->type); 631 } 632 exit_all: 633 spin_lock_irq(&mac->lock); 634 mac->associated = associated; 635 spin_unlock_irq(&mac->lock); 636 } 637 638 static int plfxlc_get_stats(struct ieee80211_hw *hw, 639 struct ieee80211_low_level_stats *stats) 640 { 641 stats->dot11ACKFailureCount = 0; 642 stats->dot11RTSFailureCount = 0; 643 stats->dot11FCSErrorCount = 0; 644 stats->dot11RTSSuccessCount = 0; 645 return 0; 646 } 647 648 static const char et_strings[][ETH_GSTRING_LEN] = { 649 "phy_rssi", 650 "phy_rx_crc_err" 651 }; 652 653 static int plfxlc_get_et_sset_count(struct ieee80211_hw *hw, 654 struct ieee80211_vif *vif, int sset) 655 { 656 if (sset == ETH_SS_STATS) 657 return ARRAY_SIZE(et_strings); 658 659 return 0; 660 } 661 662 static void plfxlc_get_et_strings(struct ieee80211_hw *hw, 663 struct ieee80211_vif *vif, 664 u32 sset, u8 *data) 665 { 666 if (sset == ETH_SS_STATS) 667 memcpy(data, et_strings, sizeof(et_strings)); 668 } 669 670 static void plfxlc_get_et_stats(struct ieee80211_hw *hw, 671 struct ieee80211_vif *vif, 672 struct ethtool_stats *stats, u64 *data) 673 { 674 struct plfxlc_mac *mac = plfxlc_hw_mac(hw); 675 676 data[0] = mac->rssi; 677 data[1] = mac->crc_errors; 678 } 679 680 static int plfxlc_set_rts_threshold(struct ieee80211_hw *hw, u32 value) 681 { 682 return 0; 683 } 684 685 static const struct ieee80211_ops plfxlc_ops = { 686 .add_chanctx = ieee80211_emulate_add_chanctx, 687 .remove_chanctx = ieee80211_emulate_remove_chanctx, 688 .change_chanctx = ieee80211_emulate_change_chanctx, 689 .switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx, 690 .tx = plfxlc_op_tx, 691 .wake_tx_queue = ieee80211_handle_wake_tx_queue, 692 .start = plfxlc_op_start, 693 .stop = plfxlc_op_stop, 694 .add_interface = plfxlc_op_add_interface, 695 .remove_interface = plfxlc_op_remove_interface, 696 .set_rts_threshold = plfxlc_set_rts_threshold, 697 .config = plfxlc_op_config, 698 .configure_filter = plfxlc_op_configure_filter, 699 .bss_info_changed = plfxlc_op_bss_info_changed, 700 .get_stats = plfxlc_get_stats, 701 .get_et_sset_count = plfxlc_get_et_sset_count, 702 .get_et_stats = plfxlc_get_et_stats, 703 .get_et_strings = plfxlc_get_et_strings, 704 }; 705 706 struct ieee80211_hw *plfxlc_mac_alloc_hw(struct usb_interface *intf) 707 { 708 struct ieee80211_hw *hw; 709 struct plfxlc_mac *mac; 710 711 hw = ieee80211_alloc_hw(sizeof(struct plfxlc_mac), &plfxlc_ops); 712 if (!hw) { 713 dev_dbg(&intf->dev, "out of memory\n"); 714 return NULL; 715 } 716 set_wiphy_dev(hw->wiphy, &intf->dev); 717 718 mac = plfxlc_hw_mac(hw); 719 memset(mac, 0, sizeof(*mac)); 720 spin_lock_init(&mac->lock); 721 mac->hw = hw; 722 723 mac->type = NL80211_IFTYPE_UNSPECIFIED; 724 725 memcpy(mac->channels, plfxlc_channels, sizeof(plfxlc_channels)); 726 memcpy(mac->rates, plfxlc_rates, sizeof(plfxlc_rates)); 727 mac->band.n_bitrates = ARRAY_SIZE(plfxlc_rates); 728 mac->band.bitrates = mac->rates; 729 mac->band.n_channels = ARRAY_SIZE(plfxlc_channels); 730 mac->band.channels = mac->channels; 731 hw->wiphy->bands[NL80211_BAND_LC] = &mac->band; 732 hw->conf.chandef.width = NL80211_CHAN_WIDTH_20; 733 734 ieee80211_hw_set(hw, RX_INCLUDES_FCS); 735 ieee80211_hw_set(hw, SIGNAL_DBM); 736 ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); 737 ieee80211_hw_set(hw, MFP_CAPABLE); 738 739 hw->wiphy->interface_modes = 740 BIT(NL80211_IFTYPE_STATION) | 741 BIT(NL80211_IFTYPE_ADHOC); 742 hw->max_signal = 100; 743 hw->queues = 1; 744 /* 4 for 32 bit alignment if no tailroom */ 745 hw->extra_tx_headroom = sizeof(struct plfxlc_ctrlset) + 4; 746 /* Tell mac80211 that we support multi rate retries */ 747 hw->max_rates = IEEE80211_TX_MAX_RATES; 748 hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ 749 750 skb_queue_head_init(&mac->ack_wait_queue); 751 mac->ack_pending = 0; 752 753 plfxlc_chip_init(&mac->chip, hw, intf); 754 755 SET_IEEE80211_DEV(hw, &intf->dev); 756 return hw; 757 } 758