1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Copyright (c) 2015-2016 Quantenna Communications. All rights reserved. */ 3 4 #include <linux/kernel.h> 5 #include <linux/module.h> 6 #include <linux/if_ether.h> 7 #include <linux/nospec.h> 8 9 #include "core.h" 10 #include "bus.h" 11 #include "trans.h" 12 #include "commands.h" 13 #include "cfg80211.h" 14 #include "event.h" 15 #include "util.h" 16 #include "switchdev.h" 17 18 #define QTNF_PRIMARY_VIF_IDX 0 19 20 static bool slave_radar = true; 21 module_param(slave_radar, bool, 0644); 22 MODULE_PARM_DESC(slave_radar, "set 0 to disable radar detection in slave mode"); 23 24 static bool dfs_offload; 25 module_param(dfs_offload, bool, 0644); 26 MODULE_PARM_DESC(dfs_offload, "set 1 to enable DFS offload to firmware"); 27 28 static struct dentry *qtnf_debugfs_dir; 29 30 bool qtnf_slave_radar_get(void) 31 { 32 return slave_radar; 33 } 34 35 bool qtnf_dfs_offload_get(void) 36 { 37 return dfs_offload; 38 } 39 40 struct qtnf_wmac *qtnf_core_get_mac(const struct qtnf_bus *bus, u8 macid) 41 { 42 struct qtnf_wmac *mac = NULL; 43 44 if (macid >= QTNF_MAX_MAC) { 45 pr_err("invalid MAC index %u\n", macid); 46 return NULL; 47 } 48 49 macid = array_index_nospec(macid, QTNF_MAX_MAC); 50 mac = bus->mac[macid]; 51 52 if (unlikely(!mac)) { 53 pr_err("MAC%u: not initialized\n", macid); 54 return NULL; 55 } 56 57 return mac; 58 } 59 60 /* Netdev handler for open. 61 */ 62 static int qtnf_netdev_open(struct net_device *ndev) 63 { 64 netif_carrier_off(ndev); 65 qtnf_netdev_updown(ndev, 1); 66 return 0; 67 } 68 69 /* Netdev handler for close. 70 */ 71 static int qtnf_netdev_close(struct net_device *ndev) 72 { 73 netif_carrier_off(ndev); 74 qtnf_virtual_intf_cleanup(ndev); 75 qtnf_netdev_updown(ndev, 0); 76 return 0; 77 } 78 79 static void qtnf_packet_send_hi_pri(struct sk_buff *skb) 80 { 81 struct qtnf_vif *vif = qtnf_netdev_get_priv(skb->dev); 82 83 skb_queue_tail(&vif->high_pri_tx_queue, skb); 84 queue_work(vif->mac->bus->hprio_workqueue, &vif->high_pri_tx_work); 85 } 86 87 /* Netdev handler for data transmission. 88 */ 89 static netdev_tx_t 90 qtnf_netdev_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) 91 { 92 struct qtnf_vif *vif; 93 struct qtnf_wmac *mac; 94 95 vif = qtnf_netdev_get_priv(ndev); 96 97 if (unlikely(skb->dev != ndev)) { 98 pr_err_ratelimited("invalid skb->dev"); 99 dev_kfree_skb_any(skb); 100 return 0; 101 } 102 103 if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)) { 104 pr_err_ratelimited("%s: VIF not initialized\n", ndev->name); 105 dev_kfree_skb_any(skb); 106 return 0; 107 } 108 109 mac = vif->mac; 110 if (unlikely(!mac)) { 111 pr_err_ratelimited("%s: NULL mac pointer", ndev->name); 112 dev_kfree_skb_any(skb); 113 return 0; 114 } 115 116 if (!skb->len || (skb->len > ETH_FRAME_LEN)) { 117 pr_err_ratelimited("%s: invalid skb len %d\n", ndev->name, 118 skb->len); 119 dev_kfree_skb_any(skb); 120 ndev->stats.tx_dropped++; 121 return 0; 122 } 123 124 /* tx path is enabled: reset vif timeout */ 125 vif->cons_tx_timeout_cnt = 0; 126 127 if (unlikely(skb->protocol == htons(ETH_P_PAE))) { 128 qtnf_packet_send_hi_pri(skb); 129 dev_sw_netstats_tx_add(ndev, 1, skb->len); 130 return NETDEV_TX_OK; 131 } 132 133 return qtnf_bus_data_tx(mac->bus, skb, mac->macid, vif->vifid); 134 } 135 136 /* Netdev handler for transmission timeout. 137 */ 138 static void qtnf_netdev_tx_timeout(struct net_device *ndev, unsigned int txqueue) 139 { 140 struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev); 141 struct qtnf_wmac *mac; 142 struct qtnf_bus *bus; 143 144 if (unlikely(!vif || !vif->mac || !vif->mac->bus)) 145 return; 146 147 mac = vif->mac; 148 bus = mac->bus; 149 150 pr_warn("VIF%u.%u: Tx timeout- %lu\n", mac->macid, vif->vifid, jiffies); 151 152 qtnf_bus_data_tx_timeout(bus, ndev); 153 ndev->stats.tx_errors++; 154 155 if (++vif->cons_tx_timeout_cnt > QTNF_TX_TIMEOUT_TRSHLD) { 156 pr_err("Tx timeout threshold exceeded !\n"); 157 pr_err("schedule interface %s reset !\n", netdev_name(ndev)); 158 queue_work(bus->workqueue, &vif->reset_work); 159 } 160 } 161 162 static int qtnf_netdev_set_mac_address(struct net_device *ndev, void *addr) 163 { 164 struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev); 165 struct sockaddr *sa = addr; 166 int ret; 167 unsigned char old_addr[ETH_ALEN]; 168 169 memcpy(old_addr, sa->sa_data, sizeof(old_addr)); 170 171 ret = eth_mac_addr(ndev, sa); 172 if (ret) 173 return ret; 174 175 qtnf_scan_done(vif->mac, true); 176 177 ret = qtnf_cmd_send_change_intf_type(vif, vif->wdev.iftype, 178 vif->wdev.use_4addr, 179 sa->sa_data); 180 181 if (ret) 182 memcpy(ndev->dev_addr, old_addr, ETH_ALEN); 183 184 return ret; 185 } 186 187 static int qtnf_netdev_port_parent_id(struct net_device *ndev, 188 struct netdev_phys_item_id *ppid) 189 { 190 const struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev); 191 const struct qtnf_bus *bus = vif->mac->bus; 192 193 ppid->id_len = sizeof(bus->hw_id); 194 memcpy(&ppid->id, bus->hw_id, ppid->id_len); 195 196 return 0; 197 } 198 199 static int qtnf_netdev_alloc_pcpu_stats(struct net_device *dev) 200 { 201 dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); 202 203 return dev->tstats ? 0 : -ENOMEM; 204 } 205 206 static void qtnf_netdev_free_pcpu_stats(struct net_device *dev) 207 { 208 free_percpu(dev->tstats); 209 } 210 211 /* Network device ops handlers */ 212 const struct net_device_ops qtnf_netdev_ops = { 213 .ndo_init = qtnf_netdev_alloc_pcpu_stats, 214 .ndo_uninit = qtnf_netdev_free_pcpu_stats, 215 .ndo_open = qtnf_netdev_open, 216 .ndo_stop = qtnf_netdev_close, 217 .ndo_start_xmit = qtnf_netdev_hard_start_xmit, 218 .ndo_tx_timeout = qtnf_netdev_tx_timeout, 219 .ndo_get_stats64 = dev_get_tstats64, 220 .ndo_set_mac_address = qtnf_netdev_set_mac_address, 221 .ndo_get_port_parent_id = qtnf_netdev_port_parent_id, 222 }; 223 224 static int qtnf_mac_init_single_band(struct wiphy *wiphy, 225 struct qtnf_wmac *mac, 226 enum nl80211_band band) 227 { 228 int ret; 229 230 wiphy->bands[band] = kzalloc(sizeof(*wiphy->bands[band]), GFP_KERNEL); 231 if (!wiphy->bands[band]) 232 return -ENOMEM; 233 234 wiphy->bands[band]->band = band; 235 236 ret = qtnf_cmd_band_info_get(mac, wiphy->bands[band]); 237 if (ret) { 238 pr_err("MAC%u: band %u: failed to get chans info: %d\n", 239 mac->macid, band, ret); 240 return ret; 241 } 242 243 qtnf_band_init_rates(wiphy->bands[band]); 244 245 return 0; 246 } 247 248 static int qtnf_mac_init_bands(struct qtnf_wmac *mac) 249 { 250 struct wiphy *wiphy = priv_to_wiphy(mac); 251 int ret = 0; 252 253 if (mac->macinfo.bands_cap & QLINK_BAND_2GHZ) { 254 ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_2GHZ); 255 if (ret) 256 goto out; 257 } 258 259 if (mac->macinfo.bands_cap & QLINK_BAND_5GHZ) { 260 ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_5GHZ); 261 if (ret) 262 goto out; 263 } 264 265 if (mac->macinfo.bands_cap & QLINK_BAND_60GHZ) 266 ret = qtnf_mac_init_single_band(wiphy, mac, NL80211_BAND_60GHZ); 267 268 out: 269 return ret; 270 } 271 272 struct qtnf_vif *qtnf_mac_get_free_vif(struct qtnf_wmac *mac) 273 { 274 struct qtnf_vif *vif; 275 int i; 276 277 for (i = 0; i < QTNF_MAX_INTF; i++) { 278 vif = &mac->iflist[i]; 279 if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) 280 return vif; 281 } 282 283 return NULL; 284 } 285 286 struct qtnf_vif *qtnf_mac_get_base_vif(struct qtnf_wmac *mac) 287 { 288 struct qtnf_vif *vif; 289 290 vif = &mac->iflist[QTNF_PRIMARY_VIF_IDX]; 291 292 if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) 293 return NULL; 294 295 return vif; 296 } 297 298 void qtnf_mac_iface_comb_free(struct qtnf_wmac *mac) 299 { 300 struct ieee80211_iface_combination *comb; 301 int i; 302 303 if (mac->macinfo.if_comb) { 304 for (i = 0; i < mac->macinfo.n_if_comb; i++) { 305 comb = &mac->macinfo.if_comb[i]; 306 kfree(comb->limits); 307 comb->limits = NULL; 308 } 309 310 kfree(mac->macinfo.if_comb); 311 mac->macinfo.if_comb = NULL; 312 } 313 } 314 315 void qtnf_mac_ext_caps_free(struct qtnf_wmac *mac) 316 { 317 if (mac->macinfo.extended_capabilities_len) { 318 kfree(mac->macinfo.extended_capabilities); 319 mac->macinfo.extended_capabilities = NULL; 320 321 kfree(mac->macinfo.extended_capabilities_mask); 322 mac->macinfo.extended_capabilities_mask = NULL; 323 324 mac->macinfo.extended_capabilities_len = 0; 325 } 326 } 327 328 static void qtnf_vif_reset_handler(struct work_struct *work) 329 { 330 struct qtnf_vif *vif = container_of(work, struct qtnf_vif, reset_work); 331 332 rtnl_lock(); 333 334 if (vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) { 335 rtnl_unlock(); 336 return; 337 } 338 339 /* stop tx completely */ 340 netif_tx_stop_all_queues(vif->netdev); 341 if (netif_carrier_ok(vif->netdev)) 342 netif_carrier_off(vif->netdev); 343 344 qtnf_cfg80211_vif_reset(vif); 345 346 rtnl_unlock(); 347 } 348 349 static void qtnf_mac_init_primary_intf(struct qtnf_wmac *mac) 350 { 351 struct qtnf_vif *vif = &mac->iflist[QTNF_PRIMARY_VIF_IDX]; 352 353 vif->wdev.iftype = NL80211_IFTYPE_STATION; 354 vif->bss_priority = QTNF_DEF_BSS_PRIORITY; 355 vif->wdev.wiphy = priv_to_wiphy(mac); 356 INIT_WORK(&vif->reset_work, qtnf_vif_reset_handler); 357 vif->cons_tx_timeout_cnt = 0; 358 } 359 360 static void qtnf_mac_scan_finish(struct qtnf_wmac *mac, bool aborted) 361 { 362 struct cfg80211_scan_info info = { 363 .aborted = aborted, 364 }; 365 366 mutex_lock(&mac->mac_lock); 367 368 if (mac->scan_req) { 369 cfg80211_scan_done(mac->scan_req, &info); 370 mac->scan_req = NULL; 371 } 372 373 mutex_unlock(&mac->mac_lock); 374 } 375 376 void qtnf_scan_done(struct qtnf_wmac *mac, bool aborted) 377 { 378 cancel_delayed_work_sync(&mac->scan_timeout); 379 qtnf_mac_scan_finish(mac, aborted); 380 } 381 382 static void qtnf_mac_scan_timeout(struct work_struct *work) 383 { 384 struct qtnf_wmac *mac = 385 container_of(work, struct qtnf_wmac, scan_timeout.work); 386 387 pr_warn("MAC%d: scan timed out\n", mac->macid); 388 qtnf_mac_scan_finish(mac, true); 389 } 390 391 static void qtnf_vif_send_data_high_pri(struct work_struct *work) 392 { 393 struct qtnf_vif *vif = 394 container_of(work, struct qtnf_vif, high_pri_tx_work); 395 struct sk_buff *skb; 396 397 if (!vif->netdev || 398 vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED) 399 return; 400 401 while ((skb = skb_dequeue(&vif->high_pri_tx_queue))) { 402 qtnf_cmd_send_frame(vif, 0, QLINK_FRAME_TX_FLAG_8023, 403 0, skb->data, skb->len); 404 dev_kfree_skb_any(skb); 405 } 406 } 407 408 static struct qtnf_wmac *qtnf_core_mac_alloc(struct qtnf_bus *bus, 409 unsigned int macid) 410 { 411 struct platform_device *pdev = NULL; 412 struct qtnf_wmac *mac; 413 struct qtnf_vif *vif; 414 struct wiphy *wiphy; 415 unsigned int i; 416 417 if (bus->hw_info.num_mac > 1) { 418 pdev = platform_device_register_data(bus->dev, 419 dev_name(bus->dev), 420 macid, NULL, 0); 421 if (IS_ERR(pdev)) 422 return ERR_PTR(-EINVAL); 423 } 424 425 wiphy = qtnf_wiphy_allocate(bus, pdev); 426 if (!wiphy) { 427 if (pdev) 428 platform_device_unregister(pdev); 429 return ERR_PTR(-ENOMEM); 430 } 431 432 mac = wiphy_priv(wiphy); 433 434 mac->macid = macid; 435 mac->pdev = pdev; 436 mac->bus = bus; 437 mutex_init(&mac->mac_lock); 438 INIT_DELAYED_WORK(&mac->scan_timeout, qtnf_mac_scan_timeout); 439 440 for (i = 0; i < QTNF_MAX_INTF; i++) { 441 vif = &mac->iflist[i]; 442 443 memset(vif, 0, sizeof(*vif)); 444 vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED; 445 vif->mac = mac; 446 vif->vifid = i; 447 qtnf_sta_list_init(&vif->sta_list); 448 INIT_WORK(&vif->high_pri_tx_work, qtnf_vif_send_data_high_pri); 449 skb_queue_head_init(&vif->high_pri_tx_queue); 450 } 451 452 qtnf_mac_init_primary_intf(mac); 453 bus->mac[macid] = mac; 454 455 return mac; 456 } 457 458 static const struct ethtool_ops qtnf_ethtool_ops = { 459 .get_drvinfo = cfg80211_get_drvinfo, 460 }; 461 462 int qtnf_core_net_attach(struct qtnf_wmac *mac, struct qtnf_vif *vif, 463 const char *name, unsigned char name_assign_type) 464 { 465 struct wiphy *wiphy = priv_to_wiphy(mac); 466 struct net_device *dev; 467 void *qdev_vif; 468 int ret; 469 470 dev = alloc_netdev_mqs(sizeof(struct qtnf_vif *), name, 471 name_assign_type, ether_setup, 1, 1); 472 if (!dev) 473 return -ENOMEM; 474 475 vif->netdev = dev; 476 477 dev->netdev_ops = &qtnf_netdev_ops; 478 dev->needs_free_netdev = true; 479 dev_net_set(dev, wiphy_net(wiphy)); 480 dev->ieee80211_ptr = &vif->wdev; 481 ether_addr_copy(dev->dev_addr, vif->mac_addr); 482 dev->flags |= IFF_BROADCAST | IFF_MULTICAST; 483 dev->watchdog_timeo = QTNF_DEF_WDOG_TIMEOUT; 484 dev->tx_queue_len = 100; 485 dev->ethtool_ops = &qtnf_ethtool_ops; 486 487 if (qtnf_hwcap_is_set(&mac->bus->hw_info, QLINK_HW_CAPAB_HW_BRIDGE)) 488 dev->needed_tailroom = sizeof(struct qtnf_frame_meta_info); 489 490 qdev_vif = netdev_priv(dev); 491 *((void **)qdev_vif) = vif; 492 493 SET_NETDEV_DEV(dev, wiphy_dev(wiphy)); 494 495 ret = register_netdevice(dev); 496 if (ret) { 497 free_netdev(dev); 498 vif->netdev = NULL; 499 } 500 501 return ret; 502 } 503 504 static void qtnf_core_mac_detach(struct qtnf_bus *bus, unsigned int macid) 505 { 506 struct qtnf_wmac *mac; 507 struct wiphy *wiphy; 508 struct qtnf_vif *vif; 509 unsigned int i; 510 enum nl80211_band band; 511 512 mac = bus->mac[macid]; 513 514 if (!mac) 515 return; 516 517 wiphy = priv_to_wiphy(mac); 518 519 for (i = 0; i < QTNF_MAX_INTF; i++) { 520 vif = &mac->iflist[i]; 521 rtnl_lock(); 522 if (vif->netdev && 523 vif->wdev.iftype != NL80211_IFTYPE_UNSPECIFIED) { 524 qtnf_virtual_intf_cleanup(vif->netdev); 525 qtnf_del_virtual_intf(wiphy, &vif->wdev); 526 } 527 rtnl_unlock(); 528 qtnf_sta_list_free(&vif->sta_list); 529 } 530 531 if (mac->wiphy_registered) 532 wiphy_unregister(wiphy); 533 534 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; ++band) { 535 if (!wiphy->bands[band]) 536 continue; 537 538 kfree(wiphy->bands[band]->iftype_data); 539 wiphy->bands[band]->n_iftype_data = 0; 540 541 kfree(wiphy->bands[band]->channels); 542 wiphy->bands[band]->n_channels = 0; 543 544 kfree(wiphy->bands[band]); 545 wiphy->bands[band] = NULL; 546 } 547 548 platform_device_unregister(mac->pdev); 549 qtnf_mac_iface_comb_free(mac); 550 qtnf_mac_ext_caps_free(mac); 551 kfree(mac->macinfo.wowlan); 552 kfree(mac->rd); 553 mac->rd = NULL; 554 wiphy_free(wiphy); 555 bus->mac[macid] = NULL; 556 } 557 558 static int qtnf_core_mac_attach(struct qtnf_bus *bus, unsigned int macid) 559 { 560 struct qtnf_wmac *mac; 561 struct qtnf_vif *vif; 562 int ret; 563 564 if (!(bus->hw_info.mac_bitmap & BIT(macid))) { 565 pr_info("MAC%u is not active in FW\n", macid); 566 return 0; 567 } 568 569 mac = qtnf_core_mac_alloc(bus, macid); 570 if (IS_ERR(mac)) { 571 pr_err("MAC%u allocation failed\n", macid); 572 return PTR_ERR(mac); 573 } 574 575 vif = qtnf_mac_get_base_vif(mac); 576 if (!vif) { 577 pr_err("MAC%u: primary VIF is not ready\n", macid); 578 ret = -EFAULT; 579 goto error; 580 } 581 582 ret = qtnf_cmd_send_add_intf(vif, vif->wdev.iftype, 583 vif->wdev.use_4addr, vif->mac_addr); 584 if (ret) { 585 pr_err("MAC%u: failed to add VIF\n", macid); 586 goto error; 587 } 588 589 ret = qtnf_cmd_get_mac_info(mac); 590 if (ret) { 591 pr_err("MAC%u: failed to get MAC info\n", macid); 592 goto error_del_vif; 593 } 594 595 /* Use MAC address of the first active radio as a unique device ID */ 596 if (is_zero_ether_addr(mac->bus->hw_id)) 597 ether_addr_copy(mac->bus->hw_id, mac->macaddr); 598 599 ret = qtnf_mac_init_bands(mac); 600 if (ret) { 601 pr_err("MAC%u: failed to init bands\n", macid); 602 goto error_del_vif; 603 } 604 605 ret = qtnf_wiphy_register(&bus->hw_info, mac); 606 if (ret) { 607 pr_err("MAC%u: wiphy registration failed\n", macid); 608 goto error_del_vif; 609 } 610 611 mac->wiphy_registered = 1; 612 613 rtnl_lock(); 614 615 ret = qtnf_core_net_attach(mac, vif, "wlan%d", NET_NAME_ENUM); 616 rtnl_unlock(); 617 618 if (ret) { 619 pr_err("MAC%u: failed to attach netdev\n", macid); 620 goto error_del_vif; 621 } 622 623 if (qtnf_hwcap_is_set(&bus->hw_info, QLINK_HW_CAPAB_HW_BRIDGE)) { 624 ret = qtnf_cmd_netdev_changeupper(vif, vif->netdev->ifindex); 625 if (ret) 626 goto error; 627 } 628 629 pr_debug("MAC%u initialized\n", macid); 630 631 return 0; 632 633 error_del_vif: 634 qtnf_cmd_send_del_intf(vif); 635 vif->wdev.iftype = NL80211_IFTYPE_UNSPECIFIED; 636 error: 637 qtnf_core_mac_detach(bus, macid); 638 return ret; 639 } 640 641 bool qtnf_netdev_is_qtn(const struct net_device *ndev) 642 { 643 return ndev->netdev_ops == &qtnf_netdev_ops; 644 } 645 646 static int qtnf_check_br_ports(struct net_device *dev, 647 struct netdev_nested_priv *priv) 648 { 649 struct net_device *ndev = (struct net_device *)priv->data; 650 651 if (dev != ndev && netdev_port_same_parent_id(dev, ndev)) 652 return -ENOTSUPP; 653 654 return 0; 655 } 656 657 static int qtnf_core_netdevice_event(struct notifier_block *nb, 658 unsigned long event, void *ptr) 659 { 660 struct net_device *ndev = netdev_notifier_info_to_dev(ptr); 661 const struct netdev_notifier_changeupper_info *info; 662 struct netdev_nested_priv priv = { 663 .data = (void *)ndev, 664 }; 665 struct net_device *brdev; 666 struct qtnf_vif *vif; 667 struct qtnf_bus *bus; 668 int br_domain; 669 int ret = 0; 670 671 if (!qtnf_netdev_is_qtn(ndev)) 672 return NOTIFY_DONE; 673 674 if (!net_eq(dev_net(ndev), &init_net)) 675 return NOTIFY_OK; 676 677 vif = qtnf_netdev_get_priv(ndev); 678 bus = vif->mac->bus; 679 680 switch (event) { 681 case NETDEV_CHANGEUPPER: 682 info = ptr; 683 brdev = info->upper_dev; 684 685 if (!netif_is_bridge_master(brdev)) 686 break; 687 688 pr_debug("[VIF%u.%u] change bridge: %s %s\n", 689 vif->mac->macid, vif->vifid, netdev_name(brdev), 690 info->linking ? "add" : "del"); 691 692 if (IS_ENABLED(CONFIG_NET_SWITCHDEV) && 693 qtnf_hwcap_is_set(&bus->hw_info, 694 QLINK_HW_CAPAB_HW_BRIDGE)) { 695 if (info->linking) 696 br_domain = brdev->ifindex; 697 else 698 br_domain = ndev->ifindex; 699 700 ret = qtnf_cmd_netdev_changeupper(vif, br_domain); 701 } else { 702 ret = netdev_walk_all_lower_dev(brdev, 703 qtnf_check_br_ports, 704 &priv); 705 } 706 707 break; 708 default: 709 break; 710 } 711 712 return notifier_from_errno(ret); 713 } 714 715 int qtnf_core_attach(struct qtnf_bus *bus) 716 { 717 unsigned int i; 718 int ret; 719 720 qtnf_trans_init(bus); 721 qtnf_bus_data_rx_start(bus); 722 723 bus->workqueue = alloc_ordered_workqueue("QTNF_BUS", 0); 724 if (!bus->workqueue) { 725 pr_err("failed to alloc main workqueue\n"); 726 ret = -ENOMEM; 727 goto error; 728 } 729 730 bus->hprio_workqueue = alloc_workqueue("QTNF_HPRI", WQ_HIGHPRI, 0); 731 if (!bus->hprio_workqueue) { 732 pr_err("failed to alloc high prio workqueue\n"); 733 ret = -ENOMEM; 734 goto error; 735 } 736 737 INIT_WORK(&bus->event_work, qtnf_event_work_handler); 738 739 ret = qtnf_cmd_send_init_fw(bus); 740 if (ret) { 741 pr_err("failed to init FW: %d\n", ret); 742 goto error; 743 } 744 745 if (QLINK_VER_MAJOR(bus->hw_info.ql_proto_ver) != 746 QLINK_PROTO_VER_MAJOR) { 747 pr_err("qlink driver vs FW version mismatch: %u vs %u\n", 748 QLINK_PROTO_VER_MAJOR, 749 QLINK_VER_MAJOR(bus->hw_info.ql_proto_ver)); 750 ret = -EPROTONOSUPPORT; 751 goto error; 752 } 753 754 bus->fw_state = QTNF_FW_STATE_ACTIVE; 755 ret = qtnf_cmd_get_hw_info(bus); 756 if (ret) { 757 pr_err("failed to get HW info: %d\n", ret); 758 goto error; 759 } 760 761 if (qtnf_hwcap_is_set(&bus->hw_info, QLINK_HW_CAPAB_HW_BRIDGE) && 762 bus->bus_ops->data_tx_use_meta_set) 763 bus->bus_ops->data_tx_use_meta_set(bus, true); 764 765 if (bus->hw_info.num_mac > QTNF_MAX_MAC) { 766 pr_err("no support for number of MACs=%u\n", 767 bus->hw_info.num_mac); 768 ret = -ERANGE; 769 goto error; 770 } 771 772 for (i = 0; i < bus->hw_info.num_mac; i++) { 773 ret = qtnf_core_mac_attach(bus, i); 774 775 if (ret) { 776 pr_err("MAC%u: attach failed: %d\n", i, ret); 777 goto error; 778 } 779 } 780 781 bus->netdev_nb.notifier_call = qtnf_core_netdevice_event; 782 ret = register_netdevice_notifier(&bus->netdev_nb); 783 if (ret) { 784 pr_err("failed to register netdev notifier: %d\n", ret); 785 goto error; 786 } 787 788 bus->fw_state = QTNF_FW_STATE_RUNNING; 789 return 0; 790 791 error: 792 qtnf_core_detach(bus); 793 return ret; 794 } 795 EXPORT_SYMBOL_GPL(qtnf_core_attach); 796 797 void qtnf_core_detach(struct qtnf_bus *bus) 798 { 799 unsigned int macid; 800 801 unregister_netdevice_notifier(&bus->netdev_nb); 802 qtnf_bus_data_rx_stop(bus); 803 804 for (macid = 0; macid < QTNF_MAX_MAC; macid++) 805 qtnf_core_mac_detach(bus, macid); 806 807 if (qtnf_fw_is_up(bus)) 808 qtnf_cmd_send_deinit_fw(bus); 809 810 bus->fw_state = QTNF_FW_STATE_DETACHED; 811 812 if (bus->workqueue) { 813 flush_workqueue(bus->workqueue); 814 destroy_workqueue(bus->workqueue); 815 bus->workqueue = NULL; 816 } 817 818 if (bus->hprio_workqueue) { 819 flush_workqueue(bus->hprio_workqueue); 820 destroy_workqueue(bus->hprio_workqueue); 821 bus->hprio_workqueue = NULL; 822 } 823 824 qtnf_trans_free(bus); 825 } 826 EXPORT_SYMBOL_GPL(qtnf_core_detach); 827 828 static inline int qtnf_is_frame_meta_magic_valid(struct qtnf_frame_meta_info *m) 829 { 830 return m->magic_s == HBM_FRAME_META_MAGIC_PATTERN_S && 831 m->magic_e == HBM_FRAME_META_MAGIC_PATTERN_E; 832 } 833 834 struct net_device *qtnf_classify_skb(struct qtnf_bus *bus, struct sk_buff *skb) 835 { 836 struct qtnf_frame_meta_info *meta; 837 struct net_device *ndev = NULL; 838 struct qtnf_wmac *mac; 839 struct qtnf_vif *vif; 840 841 if (unlikely(bus->fw_state != QTNF_FW_STATE_RUNNING)) 842 return NULL; 843 844 meta = (struct qtnf_frame_meta_info *) 845 (skb_tail_pointer(skb) - sizeof(*meta)); 846 847 if (unlikely(!qtnf_is_frame_meta_magic_valid(meta))) { 848 pr_err_ratelimited("invalid magic 0x%x:0x%x\n", 849 meta->magic_s, meta->magic_e); 850 goto out; 851 } 852 853 if (unlikely(meta->macid >= QTNF_MAX_MAC)) { 854 pr_err_ratelimited("invalid mac(%u)\n", meta->macid); 855 goto out; 856 } 857 858 if (unlikely(meta->ifidx >= QTNF_MAX_INTF)) { 859 pr_err_ratelimited("invalid vif(%u)\n", meta->ifidx); 860 goto out; 861 } 862 863 mac = bus->mac[meta->macid]; 864 865 if (unlikely(!mac)) { 866 pr_err_ratelimited("mac(%d) does not exist\n", meta->macid); 867 goto out; 868 } 869 870 vif = &mac->iflist[meta->ifidx]; 871 872 if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_UNSPECIFIED)) { 873 pr_err_ratelimited("vif(%u) does not exists\n", meta->ifidx); 874 goto out; 875 } 876 877 ndev = vif->netdev; 878 879 if (unlikely(!ndev)) { 880 pr_err_ratelimited("netdev for wlan%u.%u does not exists\n", 881 meta->macid, meta->ifidx); 882 goto out; 883 } 884 885 __skb_trim(skb, skb->len - sizeof(*meta)); 886 /* Firmware always handles packets that require flooding */ 887 qtnfmac_switch_mark_skb_flooded(skb); 888 889 out: 890 return ndev; 891 } 892 EXPORT_SYMBOL_GPL(qtnf_classify_skb); 893 894 void qtnf_wake_all_queues(struct net_device *ndev) 895 { 896 struct qtnf_vif *vif = qtnf_netdev_get_priv(ndev); 897 struct qtnf_wmac *mac; 898 struct qtnf_bus *bus; 899 int macid; 900 int i; 901 902 if (unlikely(!vif || !vif->mac || !vif->mac->bus)) 903 return; 904 905 bus = vif->mac->bus; 906 907 for (macid = 0; macid < QTNF_MAX_MAC; macid++) { 908 if (!(bus->hw_info.mac_bitmap & BIT(macid))) 909 continue; 910 911 mac = bus->mac[macid]; 912 for (i = 0; i < QTNF_MAX_INTF; i++) { 913 vif = &mac->iflist[i]; 914 if (vif->netdev && netif_queue_stopped(vif->netdev)) 915 netif_tx_wake_all_queues(vif->netdev); 916 } 917 } 918 } 919 EXPORT_SYMBOL_GPL(qtnf_wake_all_queues); 920 921 struct dentry *qtnf_get_debugfs_dir(void) 922 { 923 return qtnf_debugfs_dir; 924 } 925 EXPORT_SYMBOL_GPL(qtnf_get_debugfs_dir); 926 927 static int __init qtnf_core_register(void) 928 { 929 qtnf_debugfs_dir = debugfs_create_dir(KBUILD_MODNAME, NULL); 930 931 if (IS_ERR(qtnf_debugfs_dir)) 932 qtnf_debugfs_dir = NULL; 933 934 return 0; 935 } 936 937 static void __exit qtnf_core_exit(void) 938 { 939 debugfs_remove(qtnf_debugfs_dir); 940 } 941 942 module_init(qtnf_core_register); 943 module_exit(qtnf_core_exit); 944 945 MODULE_AUTHOR("Quantenna Communications"); 946 MODULE_DESCRIPTION("Quantenna 802.11 wireless LAN FullMAC driver."); 947 MODULE_LICENSE("GPL"); 948