drivers/net/wireless/microchip/wilc1000/netdev.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
   4  * All rights reserved.
   5  */
   6
   7 #include <linux/irq.h>
   8 #include <linux/kthread.h>
   9 #include <linux/firmware.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/inetdevice.h>
  12
  13 #include "cfg80211.h"
  14 #include "wlan_cfg.h"
  15
  16 #define WILC_MULTICAST_TABLE_SIZE       8
  17 #define WILC_MAX_FW_VERSION_STR_SIZE    50
  18
  19 /* latest API version supported */
  20 #define WILC1000_API_VER                1
  21
  22 #define WILC1000_FW_PREFIX              "atmel/wilc1000_wifi_firmware-"
  23 #define __WILC1000_FW(api)              WILC1000_FW_PREFIX #api ".bin"
  24 #define WILC1000_FW(api)                __WILC1000_FW(api)
  25
  26 #define WILC3000_API_VER                1
  27
  28 #define WILC3000_FW_PREFIX              "atmel/wilc3000_wifi_firmware-"
  29 #define __WILC3000_FW(api)              WILC3000_FW_PREFIX #api ".bin"
  30 #define WILC3000_FW(api)                __WILC3000_FW(api)
  31
  32 static irqreturn_t isr_uh_routine(int irq, void *user_data)
  33 {
  34         struct wilc *wilc = user_data;
  35
  36         if (wilc->close) {
  37                 pr_err("Can't handle UH interrupt\n");
  38                 return IRQ_HANDLED;
  39         }
  40         return IRQ_WAKE_THREAD;
  41 }
  42
  43 static irqreturn_t isr_bh_routine(int irq, void *userdata)
  44 {
  45         struct wilc *wilc = userdata;
  46
  47         if (wilc->close) {
  48                 pr_err("Can't handle BH interrupt\n");
  49                 return IRQ_HANDLED;
  50         }
  51
  52         wilc_handle_isr(wilc);
  53
  54         return IRQ_HANDLED;
  55 }
  56
  57 static int init_irq(struct net_device *dev)
  58 {
  59         struct wilc_vif *vif = netdev_priv(dev);
  60         struct wilc *wl = vif->wilc;
  61         int ret;
  62
  63         ret = request_threaded_irq(wl->dev_irq_num, isr_uh_routine,
  64                                    isr_bh_routine,
  65                                    IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
  66                                    dev->name, wl);
  67         if (ret) {
  68                 netdev_err(dev, "Failed to request IRQ [%d]\n", ret);
  69                 return ret;
  70         }
  71         netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n", wl->dev_irq_num);
  72
  73         return 0;
  74 }
  75
  76 static void deinit_irq(struct net_device *dev)
  77 {
  78         struct wilc_vif *vif = netdev_priv(dev);
  79         struct wilc *wilc = vif->wilc;
  80
  81         /* Deinitialize IRQ */
  82         if (wilc->dev_irq_num)
  83                 free_irq(wilc->dev_irq_num, wilc);
  84 }
  85
  86 void wilc_mac_indicate(struct wilc *wilc)
  87 {
  88         s8 status;
  89
  90         wilc_wlan_cfg_get_val(wilc, WID_STATUS, &status, 1);
  91         if (wilc->mac_status == WILC_MAC_STATUS_INIT) {
  92                 wilc->mac_status = status;
  93                 complete(&wilc->sync_event);
  94         } else {
  95                 wilc->mac_status = status;
  96         }
  97 }
  98
  99 static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
 100 {
 101         struct net_device *ndev = NULL;
 102         struct wilc_vif *vif;
 103         struct ieee80211_hdr *h = (struct ieee80211_hdr *)mac_header;
 104
 105         wilc_for_each_vif(wilc, vif) {
 106                 if (vif->iftype == WILC_STATION_MODE)
 107                         if (ether_addr_equal_unaligned(h->addr2, vif->bssid)) {
 108                                 ndev = vif->ndev;
 109                                 goto out;
 110                         }
 111                 if (vif->iftype == WILC_AP_MODE)
 112                         if (ether_addr_equal_unaligned(h->addr1, vif->bssid)) {
 113                                 ndev = vif->ndev;
 114                                 goto out;
 115                         }
 116         }
 117 out:
 118         return ndev;
 119 }
 120
 121 void wilc_wlan_set_bssid(struct net_device *wilc_netdev, const u8 *bssid,
 122                          u8 mode)
 123 {
 124         struct wilc_vif *vif = netdev_priv(wilc_netdev);
 125
 126         if (bssid)
 127                 ether_addr_copy(vif->bssid, bssid);
 128         else
 129                 eth_zero_addr(vif->bssid);
 130
 131         vif->iftype = mode;
 132 }
 133
 134 int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc)
 135 {
 136         int srcu_idx;
 137         u8 ret_val = 0;
 138         struct wilc_vif *vif;
 139
 140         srcu_idx = srcu_read_lock(&wilc->srcu);
 141         wilc_for_each_vif(wilc, vif) {
 142                 if (!is_zero_ether_addr(vif->bssid))
 143                         ret_val++;
 144         }
 145         srcu_read_unlock(&wilc->srcu, srcu_idx);
 146         return ret_val;
 147 }
 148
 149 static void wilc_wake_tx_queues(struct wilc *wl)
 150 {
 151         int srcu_idx;
 152         struct wilc_vif *ifc;
 153
 154         srcu_idx = srcu_read_lock(&wl->srcu);
 155         wilc_for_each_vif(wl, ifc) {
 156                 if (ifc->mac_opened && netif_queue_stopped(ifc->ndev))
 157                         netif_wake_queue(ifc->ndev);
 158         }
 159         srcu_read_unlock(&wl->srcu, srcu_idx);
 160 }
 161
 162 static int wilc_txq_task(void *vp)
 163 {
 164         int ret;
 165         u32 txq_count;
 166         struct wilc *wl = vp;
 167
 168         complete(&wl->txq_thread_started);
 169         while (1) {
 170                 if (wait_for_completion_interruptible(&wl->txq_event))
 171                         continue;
 172                 if (wl->close) {
 173                         complete(&wl->txq_thread_started);
 174
 175                         while (!kthread_should_stop())
 176                                 schedule();
 177                         break;
 178                 }
 179                 do {
 180                         ret = wilc_wlan_handle_txq(wl, &txq_count);
 181                         if (txq_count < FLOW_CONTROL_LOWER_THRESHOLD) {
 182                                 wilc_wake_tx_queues(wl);
 183                         }
 184                         if (ret != WILC_VMM_ENTRY_FULL_RETRY)
 185                                 break;
 186                         /* Back off TX task from sending packets for some time.
 187                          * msleep_interruptible will allow RX task to run and
 188                          * free buffers. TX task will be in TASK_INTERRUPTIBLE
 189                          * state which will put the thread back to CPU running
 190                          * queue when it's signaled even if the timeout isn't
 191                          * elapsed. This gives faster chance for reserved SK
 192                          * buffers to be free.
 193                          */
 194                         msleep_interruptible(TX_BACKOFF_WEIGHT_MS);
 195                 } while (!wl->close);
 196         }
 197         return 0;
 198 }
 199
 200 static int wilc_wlan_get_firmware(struct net_device *dev)
 201 {
 202         struct wilc_vif *vif = netdev_priv(dev);
 203         struct wilc *wilc = vif->wilc;
 204         const struct firmware *wilc_fw;
 205         char *firmware;
 206         int ret;
 207
 208         if (is_wilc1000(wilc->chipid))
 209                 firmware = WILC1000_FW(WILC1000_API_VER);
 210         else if (is_wilc3000(wilc->chipid))
 211                 firmware = WILC3000_FW(WILC3000_API_VER);
 212         else
 213                 return -EINVAL;
 214
 215         netdev_info(dev, "WILC%d loading firmware [%s]\n",
 216                     is_wilc1000(wilc->chipid) ? 1000 : 3000,
 217                     firmware);
 218
 219         ret = request_firmware(&wilc_fw, firmware, wilc->dev);
 220         if (ret != 0) {
 221                 netdev_err(dev, "%s - firmware not available\n", firmware);
 222                 return -EINVAL;
 223         }
 224         wilc->firmware = wilc_fw;
 225
 226         return 0;
 227 }
 228
 229 static int wilc_start_firmware(struct net_device *dev)
 230 {
 231         struct wilc_vif *vif = netdev_priv(dev);
 232         struct wilc *wilc = vif->wilc;
 233         int ret = 0;
 234
 235         ret = wilc_wlan_start(wilc);
 236         if (ret)
 237                 return ret;
 238
 239         if (!wait_for_completion_timeout(&wilc->sync_event,
 240                                          msecs_to_jiffies(5000)))
 241                 return -ETIME;
 242
 243         return 0;
 244 }
 245
 246 static int wilc_firmware_download(struct net_device *dev)
 247 {
 248         struct wilc_vif *vif = netdev_priv(dev);
 249         struct wilc *wilc = vif->wilc;
 250         int ret = 0;
 251
 252         if (!wilc->firmware) {
 253                 netdev_err(dev, "Firmware buffer is NULL\n");
 254                 return -ENOBUFS;
 255         }
 256
 257         ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
 258                                           wilc->firmware->size);
 259         if (ret)
 260                 return ret;
 261
 262         release_firmware(wilc->firmware);
 263         wilc->firmware = NULL;
 264
 265         netdev_dbg(dev, "Download Succeeded\n");
 266
 267         return 0;
 268 }
 269
 270 static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
 271 {
 272         struct wilc_priv *priv = &vif->priv;
 273         struct host_if_drv *hif_drv;
 274         u8 b;
 275         u16 hw;
 276         u32 w;
 277
 278         netdev_dbg(dev, "Start configuring Firmware\n");
 279         hif_drv = (struct host_if_drv *)priv->hif_drv;
 280         netdev_dbg(dev, "Host = %p\n", hif_drv);
 281
 282         w = vif->iftype;
 283         cpu_to_le32s(&w);
 284         if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
 285                                0, 0))
 286                 goto fail;
 287
 288         b = WILC_FW_BSS_TYPE_INFRA;
 289         if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
 290                 goto fail;
 291
 292         b = WILC_FW_TX_RATE_AUTO;
 293         if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
 294                 goto fail;
 295
 296         b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
 297         if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
 298                 goto fail;
 299
 300         b = WILC_FW_PREAMBLE_AUTO;
 301         if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
 302                 goto fail;
 303
 304         b = WILC_FW_11N_PROT_AUTO;
 305         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
 306                 goto fail;
 307
 308         b = WILC_FW_ACTIVE_SCAN;
 309         if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
 310                 goto fail;
 311
 312         b = WILC_FW_SITE_SURVEY_OFF;
 313         if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
 314                 goto fail;
 315
 316         hw = 0xffff;
 317         cpu_to_le16s(&hw);
 318         if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 319                 goto fail;
 320
 321         hw = 2346;
 322         cpu_to_le16s(&hw);
 323         if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 324                 goto fail;
 325
 326         b = 0;
 327         if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
 328                 goto fail;
 329
 330         b = 1;
 331         if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
 332                 goto fail;
 333
 334         b = WILC_FW_NO_POWERSAVE;
 335         if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
 336                 goto fail;
 337
 338         b = WILC_FW_SEC_NO;
 339         if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
 340                 goto fail;
 341
 342         b = WILC_FW_AUTH_OPEN_SYSTEM;
 343         if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
 344                 goto fail;
 345
 346         b = 3;
 347         if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
 348                 goto fail;
 349
 350         b = 3;
 351         if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
 352                 goto fail;
 353
 354         b = WILC_FW_ACK_POLICY_NORMAL;
 355         if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
 356                 goto fail;
 357
 358         b = 0;
 359         if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
 360                                0, 0))
 361                 goto fail;
 362
 363         b = 48;
 364         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
 365                 goto fail;
 366
 367         b = 28;
 368         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
 369                 goto fail;
 370
 371         hw = 100;
 372         cpu_to_le16s(&hw);
 373         if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
 374                 goto fail;
 375
 376         b = WILC_FW_REKEY_POLICY_DISABLE;
 377         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
 378                 goto fail;
 379
 380         w = 84600;
 381         cpu_to_le32s(&w);
 382         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
 383                 goto fail;
 384
 385         w = 500;
 386         cpu_to_le32s(&w);
 387         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
 388                                0))
 389                 goto fail;
 390
 391         b = 1;
 392         if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
 393                                0))
 394                 goto fail;
 395
 396         b = WILC_FW_ERP_PROT_SELF_CTS;
 397         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
 398                 goto fail;
 399
 400         b = 1;
 401         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
 402                 goto fail;
 403
 404         b = WILC_FW_11N_OP_MODE_HT_MIXED;
 405         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
 406                 goto fail;
 407
 408         b = 1;
 409         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
 410                 goto fail;
 411
 412         b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
 413         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
 414                                0, 0))
 415                 goto fail;
 416
 417         b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
 418         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
 419                 goto fail;
 420
 421         b = 0;
 422         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
 423                                0))
 424                 goto fail;
 425
 426         b = 7;
 427         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
 428                 goto fail;
 429
 430         b = 1;
 431         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
 432                                1, 0))
 433                 goto fail;
 434
 435         return 0;
 436
 437 fail:
 438         return -EINVAL;
 439 }
 440
 441 static void wlan_deinitialize_threads(struct net_device *dev)
 442 {
 443         struct wilc_vif *vif = netdev_priv(dev);
 444         struct wilc *wl = vif->wilc;
 445
 446         wl->close = 1;
 447
 448         complete(&wl->txq_event);
 449
 450         if (wl->txq_thread) {
 451                 kthread_stop(wl->txq_thread);
 452                 wl->txq_thread = NULL;
 453         }
 454 }
 455
 456 static void wilc_wlan_deinitialize(struct net_device *dev)
 457 {
 458         struct wilc_vif *vif = netdev_priv(dev);
 459         struct wilc *wl = vif->wilc;
 460
 461         if (!wl) {
 462                 netdev_err(dev, "wl is NULL\n");
 463                 return;
 464         }
 465
 466         if (wl->initialized) {
 467                 netdev_info(dev, "Deinitializing wilc1000...\n");
 468
 469                 if (!wl->dev_irq_num &&
 470                     wl->hif_func->disable_interrupt) {
 471                         mutex_lock(&wl->hif_cs);
 472                         wl->hif_func->disable_interrupt(wl);
 473                         mutex_unlock(&wl->hif_cs);
 474                 }
 475                 complete(&wl->txq_event);
 476
 477                 wlan_deinitialize_threads(dev);
 478                 deinit_irq(dev);
 479
 480                 wilc_wlan_stop(wl, vif);
 481                 wilc_wlan_cleanup(dev);
 482
 483                 wl->initialized = false;
 484
 485                 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
 486         } else {
 487                 netdev_dbg(dev, "wilc1000 is not initialized\n");
 488         }
 489 }
 490
 491 static int wlan_initialize_threads(struct net_device *dev)
 492 {
 493         struct wilc_vif *vif = netdev_priv(dev);
 494         struct wilc *wilc = vif->wilc;
 495
 496         wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
 497                                        "%s-tx", dev->name);
 498         if (IS_ERR(wilc->txq_thread)) {
 499                 netdev_err(dev, "couldn't create TXQ thread\n");
 500                 wilc->close = 1;
 501                 return PTR_ERR(wilc->txq_thread);
 502         }
 503         wait_for_completion(&wilc->txq_thread_started);
 504
 505         return 0;
 506 }
 507
 508 static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
 509 {
 510         int ret = 0;
 511         struct wilc *wl = vif->wilc;
 512
 513         if (!wl->initialized) {
 514                 wl->mac_status = WILC_MAC_STATUS_INIT;
 515                 wl->close = 0;
 516
 517                 ret = wilc_wlan_init(dev);
 518                 if (ret)
 519                         return ret;
 520
 521                 ret = wlan_initialize_threads(dev);
 522                 if (ret)
 523                         goto fail_wilc_wlan;
 524
 525                 if (wl->dev_irq_num && init_irq(dev)) {
 526                         ret = -EIO;
 527                         goto fail_threads;
 528                 }
 529
 530                 if (!wl->dev_irq_num &&
 531                     wl->hif_func->enable_interrupt &&
 532                     wl->hif_func->enable_interrupt(wl)) {
 533                         ret = -EIO;
 534                         goto fail_irq_init;
 535                 }
 536
 537                 ret = wilc_wlan_get_firmware(dev);
 538                 if (ret)
 539                         goto fail_irq_enable;
 540
 541                 ret = wilc_firmware_download(dev);
 542                 if (ret)
 543                         goto fail_irq_enable;
 544
 545                 ret = wilc_start_firmware(dev);
 546                 if (ret)
 547                         goto fail_irq_enable;
 548
 549                 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
 550                         int size;
 551                         char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
 552
 553                         size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
 554                                                      firmware_ver,
 555                                                      sizeof(firmware_ver));
 556                         firmware_ver[size] = '\0';
 557                         netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
 558                 }
 559
 560                 ret = wilc_init_fw_config(dev, vif);
 561                 if (ret) {
 562                         netdev_err(dev, "Failed to configure firmware\n");
 563                         goto fail_fw_start;
 564                 }
 565                 wl->initialized = true;
 566                 return 0;
 567
 568 fail_fw_start:
 569                 wilc_wlan_stop(wl, vif);
 570
 571 fail_irq_enable:
 572                 if (!wl->dev_irq_num &&
 573                     wl->hif_func->disable_interrupt)
 574                         wl->hif_func->disable_interrupt(wl);
 575 fail_irq_init:
 576                 if (wl->dev_irq_num)
 577                         deinit_irq(dev);
 578 fail_threads:
 579                 wlan_deinitialize_threads(dev);
 580 fail_wilc_wlan:
 581                 wilc_wlan_cleanup(dev);
 582                 netdev_err(dev, "WLAN initialization FAILED\n");
 583         } else {
 584                 netdev_dbg(dev, "wilc1000 already initialized\n");
 585         }
 586         return ret;
 587 }
 588
 589 static int mac_init_fn(struct net_device *ndev)
 590 {
 591         netif_start_queue(ndev);
 592         netif_stop_queue(ndev);
 593
 594         return 0;
 595 }
 596
 597 static int wilc_mac_open(struct net_device *ndev)
 598 {
 599         struct wilc_vif *vif = netdev_priv(ndev);
 600         struct wilc *wl = vif->wilc;
 601         int ret = 0;
 602         struct mgmt_frame_regs mgmt_regs = {};
 603
 604         if (!wl || !wl->dev) {
 605                 netdev_err(ndev, "device not ready\n");
 606                 return -ENODEV;
 607         }
 608
 609         netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
 610
 611         ret = wilc_init_host_int(ndev);
 612         if (ret)
 613                 return ret;
 614
 615         ret = wilc_wlan_initialize(ndev, vif);
 616         if (ret) {
 617                 wilc_deinit_host_int(ndev);
 618                 return ret;
 619         }
 620
 621         wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
 622                                 vif->idx);
 623
 624         netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
 625         ret = wilc_set_mac_address(vif, ndev->dev_addr);
 626         if (ret) {
 627                 netdev_err(ndev, "Failed to enforce MAC address in chip");
 628                 wilc_deinit_host_int(ndev);
 629                 if (!wl->open_ifcs)
 630                         wilc_wlan_deinitialize(ndev);
 631                 return ret;
 632         }
 633
 634         mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
 635         /* so we detect a change */
 636         vif->mgmt_reg_stypes = 0;
 637         wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
 638                                              vif->ndev->ieee80211_ptr,
 639                                              &mgmt_regs);
 640         netif_wake_queue(ndev);
 641         wl->open_ifcs++;
 642         vif->mac_opened = 1;
 643         return 0;
 644 }
 645
 646 static struct net_device_stats *mac_stats(struct net_device *dev)
 647 {
 648         struct wilc_vif *vif = netdev_priv(dev);
 649
 650         return &vif->netstats;
 651 }
 652
 653 static int wilc_set_mac_addr(struct net_device *dev, void *p)
 654 {
 655         int result;
 656         struct wilc_vif *vif = netdev_priv(dev);
 657         struct wilc *wilc = vif->wilc;
 658         struct sockaddr *addr = (struct sockaddr *)p;
 659         unsigned char mac_addr[ETH_ALEN];
 660         struct wilc_vif *tmp_vif;
 661         int srcu_idx;
 662
 663         if (!is_valid_ether_addr(addr->sa_data))
 664                 return -EADDRNOTAVAIL;
 665
 666         if (!vif->mac_opened) {
 667                 eth_commit_mac_addr_change(dev, p);
 668                 return 0;
 669         }
 670
 671         /* Verify MAC Address is not already in use: */
 672
 673         srcu_idx = srcu_read_lock(&wilc->srcu);
 674         wilc_for_each_vif(wilc, tmp_vif) {
 675                 wilc_get_mac_address(tmp_vif, mac_addr);
 676                 if (ether_addr_equal(addr->sa_data, mac_addr)) {
 677                         if (vif != tmp_vif) {
 678                                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 679                                 return -EADDRNOTAVAIL;
 680                         }
 681                         srcu_read_unlock(&wilc->srcu, srcu_idx);
 682                         return 0;
 683                 }
 684         }
 685         srcu_read_unlock(&wilc->srcu, srcu_idx);
 686
 687         result = wilc_set_mac_address(vif, addr->sa_data);
 688         if (result)
 689                 return result;
 690
 691         eth_commit_mac_addr_change(dev, p);
 692         return result;
 693 }
 694
 695 static void wilc_set_multicast_list(struct net_device *dev)
 696 {
 697         struct netdev_hw_addr *ha;
 698         struct wilc_vif *vif = netdev_priv(dev);
 699         int i;
 700         u8 *mc_list;
 701         u8 *cur_mc;
 702
 703         if (dev->flags & IFF_PROMISC)
 704                 return;
 705
 706         if (dev->flags & IFF_ALLMULTI ||
 707             dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
 708                 wilc_setup_multicast_filter(vif, 0, 0, NULL);
 709                 return;
 710         }
 711
 712         if (dev->mc.count == 0) {
 713                 wilc_setup_multicast_filter(vif, 1, 0, NULL);
 714                 return;
 715         }
 716
 717         mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
 718         if (!mc_list)
 719                 return;
 720
 721         cur_mc = mc_list;
 722         i = 0;
 723         netdev_for_each_mc_addr(ha, dev) {
 724                 memcpy(cur_mc, ha->addr, ETH_ALEN);
 725                 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
 726                 i++;
 727                 cur_mc += ETH_ALEN;
 728         }
 729
 730         if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
 731                 kfree(mc_list);
 732 }
 733
 734 static void wilc_tx_complete(void *priv, int status)
 735 {
 736         struct tx_complete_data *pv_data = priv;
 737
 738         dev_kfree_skb(pv_data->skb);
 739         kfree(pv_data);
 740 }
 741
 742 netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
 743 {
 744         struct wilc_vif *vif = netdev_priv(ndev);
 745         struct wilc *wilc = vif->wilc;
 746         struct tx_complete_data *tx_data = NULL;
 747         int queue_count;
 748
 749         if (skb->dev != ndev) {
 750                 netdev_err(ndev, "Packet not destined to this device\n");
 751                 dev_kfree_skb(skb);
 752                 return NETDEV_TX_OK;
 753         }
 754
 755         tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
 756         if (!tx_data) {
 757                 dev_kfree_skb(skb);
 758                 netif_wake_queue(ndev);
 759                 return NETDEV_TX_OK;
 760         }
 761
 762         tx_data->buff = skb->data;
 763         tx_data->size = skb->len;
 764         tx_data->skb  = skb;
 765
 766         vif->netstats.tx_packets++;
 767         vif->netstats.tx_bytes += tx_data->size;
 768         queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
 769                                                 tx_data->buff, tx_data->size,
 770                                                 wilc_tx_complete);
 771
 772         if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
 773                 int srcu_idx;
 774                 struct wilc_vif *vif;
 775
 776                 srcu_idx = srcu_read_lock(&wilc->srcu);
 777                 wilc_for_each_vif(wilc, vif) {
 778                         if (vif->mac_opened)
 779                                 netif_stop_queue(vif->ndev);
 780                 }
 781                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 782         }
 783
 784         return NETDEV_TX_OK;
 785 }
 786
 787 static int wilc_mac_close(struct net_device *ndev)
 788 {
 789         struct wilc_vif *vif = netdev_priv(ndev);
 790         struct wilc *wl = vif->wilc;
 791
 792         netdev_dbg(ndev, "Mac close\n");
 793
 794         if (wl->open_ifcs > 0)
 795                 wl->open_ifcs--;
 796         else
 797                 return 0;
 798
 799         if (vif->ndev) {
 800                 netif_stop_queue(vif->ndev);
 801
 802                 wilc_handle_disconnect(vif);
 803                 wilc_deinit_host_int(vif->ndev);
 804         }
 805
 806         if (wl->open_ifcs == 0) {
 807                 netdev_dbg(ndev, "Deinitializing wilc1000\n");
 808                 wl->close = 1;
 809                 wilc_wlan_deinitialize(ndev);
 810         }
 811
 812         vif->mac_opened = 0;
 813
 814         return 0;
 815 }
 816
 817 void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
 818                        u32 pkt_offset)
 819 {
 820         unsigned char *buff_to_send = NULL;
 821         struct net_device *wilc_netdev;
 822         unsigned int frame_len = 0;
 823         struct wilc_vif *vif;
 824         struct sk_buff *skb;
 825         int srcu_idx;
 826         int stats;
 827
 828         if (!wilc)
 829                 return;
 830
 831         srcu_idx = srcu_read_lock(&wilc->srcu);
 832         wilc_netdev = get_if_handler(wilc, buff);
 833         if (!wilc_netdev)
 834                 goto out;
 835
 836         buff += pkt_offset;
 837         vif = netdev_priv(wilc_netdev);
 838
 839         if (size > 0) {
 840                 frame_len = size;
 841                 buff_to_send = buff;
 842
 843                 skb = dev_alloc_skb(frame_len);
 844                 if (!skb)
 845                         goto out;
 846
 847                 skb->dev = wilc_netdev;
 848
 849                 skb_put_data(skb, buff_to_send, frame_len);
 850
 851                 skb->protocol = eth_type_trans(skb, wilc_netdev);
 852                 vif->netstats.rx_packets++;
 853                 vif->netstats.rx_bytes += frame_len;
 854                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 855                 stats = netif_rx(skb);
 856                 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
 857         }
 858 out:
 859         srcu_read_unlock(&wilc->srcu, srcu_idx);
 860 }
 861
 862 void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth)
 863 {
 864         int srcu_idx;
 865         struct wilc_vif *vif;
 866
 867         srcu_idx = srcu_read_lock(&wilc->srcu);
 868         wilc_for_each_vif(wilc, vif) {
 869                 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff;
 870                 u16 type = le16_to_cpup((__le16 *)buff);
 871                 u32 type_bit = BIT(type >> 4);
 872                 u32 auth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
 873
 874                 if ((vif->mgmt_reg_stypes & auth_bit &&
 875                      ieee80211_is_auth(mgmt->frame_control)) &&
 876                     vif->iftype == WILC_STATION_MODE && is_auth) {
 877                         wilc_wfi_mgmt_frame_rx(vif, buff, size);
 878                         break;
 879                 }
 880
 881                 if (vif->priv.p2p_listen_state &&
 882                     vif->mgmt_reg_stypes & type_bit)
 883                         wilc_wfi_p2p_rx(vif, buff, size);
 884
 885                 if (vif->monitor_flag)
 886                         wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
 887         }
 888         srcu_read_unlock(&wilc->srcu, srcu_idx);
 889 }
 890
 891 static const struct net_device_ops wilc_netdev_ops = {
 892         .ndo_init = mac_init_fn,
 893         .ndo_open = wilc_mac_open,
 894         .ndo_stop = wilc_mac_close,
 895         .ndo_set_mac_address = wilc_set_mac_addr,
 896         .ndo_start_xmit = wilc_mac_xmit,
 897         .ndo_get_stats = mac_stats,
 898         .ndo_set_rx_mode  = wilc_set_multicast_list,
 899 };
 900
 901 void wilc_netdev_cleanup(struct wilc *wilc)
 902 {
 903         struct wilc_vif *vif, *vif_tmp;
 904
 905         if (!wilc)
 906                 return;
 907
 908         if (wilc->firmware) {
 909                 release_firmware(wilc->firmware);
 910                 wilc->firmware = NULL;
 911         }
 912
 913         list_for_each_entry_safe(vif, vif_tmp, &wilc->vif_list, list) {
 914                 mutex_lock(&wilc->vif_mutex);
 915                 list_del_rcu(&vif->list);
 916                 wilc->vif_num--;
 917                 mutex_unlock(&wilc->vif_mutex);
 918                 synchronize_srcu(&wilc->srcu);
 919                 if (vif->ndev)
 920                         unregister_netdev(vif->ndev);
 921         }
 922
 923         wilc_wfi_deinit_mon_interface(wilc, false);
 924         destroy_workqueue(wilc->hif_workqueue);
 925
 926         wilc_wlan_cfg_deinit(wilc);
 927         wlan_deinit_locks(wilc);
 928         wiphy_unregister(wilc->wiphy);
 929         wiphy_free(wilc->wiphy);
 930 }
 931 EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
 932
 933 static u8 wilc_get_available_idx(struct wilc *wl)
 934 {
 935         int idx = 0;
 936         struct wilc_vif *vif;
 937         int srcu_idx;
 938
 939         srcu_idx = srcu_read_lock(&wl->srcu);
 940         wilc_for_each_vif(wl, vif) {
 941                 if (vif->idx == 0)
 942                         idx = 1;
 943                 else
 944                         idx = 0;
 945         }
 946         srcu_read_unlock(&wl->srcu, srcu_idx);
 947         return idx;
 948 }
 949
 950 struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
 951                                       int vif_type, enum nl80211_iftype type,
 952                                       bool rtnl_locked)
 953 {
 954         u8 mac_address[ETH_ALEN];
 955         struct net_device *ndev;
 956         struct wilc_vif *vif;
 957         int ret;
 958
 959         ndev = alloc_etherdev(sizeof(*vif));
 960         if (!ndev)
 961                 return ERR_PTR(-ENOMEM);
 962
 963         vif = netdev_priv(ndev);
 964         ndev->ieee80211_ptr = &vif->priv.wdev;
 965         strcpy(ndev->name, name);
 966         vif->wilc = wl;
 967         vif->ndev = ndev;
 968         ndev->ml_priv = vif;
 969
 970         ndev->netdev_ops = &wilc_netdev_ops;
 971
 972         SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
 973
 974         vif->priv.wdev.wiphy = wl->wiphy;
 975         vif->priv.wdev.netdev = ndev;
 976         vif->priv.wdev.iftype = type;
 977         vif->priv.dev = ndev;
 978
 979         ndev->needs_free_netdev = true;
 980         vif->iftype = vif_type;
 981         vif->idx = wilc_get_available_idx(wl);
 982         vif->mac_opened = 0;
 983
 984         memcpy(mac_address, wl->nv_mac_address, ETH_ALEN);
 985         /* WILC firmware uses locally administered MAC address for the
 986          * second virtual interface (bit 1 of first byte set), but
 987          * since it is possibly not loaded/running yet, reproduce this behavior
 988          * in the driver during interface creation.
 989          */
 990         if (vif->idx)
 991                 mac_address[0] |= 0x2;
 992
 993         eth_hw_addr_set(vif->ndev, mac_address);
 994
 995         mutex_lock(&wl->vif_mutex);
 996         list_add_tail_rcu(&vif->list, &wl->vif_list);
 997         wl->vif_num += 1;
 998         mutex_unlock(&wl->vif_mutex);
 999         synchronize_srcu(&wl->srcu);
1000
1001         if (rtnl_locked)
1002                 ret = cfg80211_register_netdevice(ndev);
1003         else
1004                 ret = register_netdev(ndev);
1005
1006         if (ret) {
1007                 ret = -EFAULT;
1008                 goto error_remove_vif;
1009         }
1010
1011         return vif;
1012
1013 error_remove_vif:
1014         mutex_lock(&wl->vif_mutex);
1015         list_del_rcu(&vif->list);
1016         wl->vif_num -= 1;
1017         mutex_unlock(&wl->vif_mutex);
1018         synchronize_srcu(&wl->srcu);
1019         free_netdev(ndev);
1020         return ERR_PTR(ret);
1021 }
1022 EXPORT_SYMBOL_GPL(wilc_netdev_ifc_init);
1023
1024 MODULE_DESCRIPTION("Atmel WILC1000 core wireless driver");
1025 MODULE_LICENSE("GPL");
1026 MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));
1027 MODULE_FIRMWARE(WILC3000_FW(WILC3000_API_VER));