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 /*(DEBLOBBED)*/
  23 #define __WILC1000_FW(api)              "/*(DEBLOBBED)*/"
  24 #define WILC1000_FW(api)                __WILC1000_FW(api)
  25
  26 static irqreturn_t isr_uh_routine(int irq, void *user_data)
  27 {
  28         struct wilc *wilc = user_data;
  29
  30         if (wilc->close) {
  31                 pr_err("Can't handle UH interrupt\n");
  32                 return IRQ_HANDLED;
  33         }
  34         return IRQ_WAKE_THREAD;
  35 }
  36
  37 static irqreturn_t isr_bh_routine(int irq, void *userdata)
  38 {
  39         struct wilc *wilc = userdata;
  40
  41         if (wilc->close) {
  42                 pr_err("Can't handle BH interrupt\n");
  43                 return IRQ_HANDLED;
  44         }
  45
  46         wilc_handle_isr(wilc);
  47
  48         return IRQ_HANDLED;
  49 }
  50
  51 static int init_irq(struct net_device *dev)
  52 {
  53         struct wilc_vif *vif = netdev_priv(dev);
  54         struct wilc *wl = vif->wilc;
  55         int ret;
  56
  57         ret = request_threaded_irq(wl->dev_irq_num, isr_uh_routine,
  58                                    isr_bh_routine,
  59                                    IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
  60                                    dev->name, wl);
  61         if (ret) {
  62                 netdev_err(dev, "Failed to request IRQ [%d]\n", ret);
  63                 return ret;
  64         }
  65         netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n", wl->dev_irq_num);
  66
  67         return 0;
  68 }
  69
  70 static void deinit_irq(struct net_device *dev)
  71 {
  72         struct wilc_vif *vif = netdev_priv(dev);
  73         struct wilc *wilc = vif->wilc;
  74
  75         /* Deinitialize IRQ */
  76         if (wilc->dev_irq_num)
  77                 free_irq(wilc->dev_irq_num, wilc);
  78 }
  79
  80 void wilc_mac_indicate(struct wilc *wilc)
  81 {
  82         s8 status;
  83
  84         wilc_wlan_cfg_get_val(wilc, WID_STATUS, &status, 1);
  85         if (wilc->mac_status == WILC_MAC_STATUS_INIT) {
  86                 wilc->mac_status = status;
  87                 complete(&wilc->sync_event);
  88         } else {
  89                 wilc->mac_status = status;
  90         }
  91 }
  92
  93 static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
  94 {
  95         struct net_device *ndev = NULL;
  96         struct wilc_vif *vif;
  97         struct ieee80211_hdr *h = (struct ieee80211_hdr *)mac_header;
  98
  99         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 100                 if (vif->iftype == WILC_STATION_MODE)
 101                         if (ether_addr_equal_unaligned(h->addr2, vif->bssid)) {
 102                                 ndev = vif->ndev;
 103                                 goto out;
 104                         }
 105                 if (vif->iftype == WILC_AP_MODE)
 106                         if (ether_addr_equal_unaligned(h->addr1, vif->bssid)) {
 107                                 ndev = vif->ndev;
 108                                 goto out;
 109                         }
 110         }
 111 out:
 112         return ndev;
 113 }
 114
 115 void wilc_wlan_set_bssid(struct net_device *wilc_netdev, const u8 *bssid,
 116                          u8 mode)
 117 {
 118         struct wilc_vif *vif = netdev_priv(wilc_netdev);
 119
 120         if (bssid)
 121                 ether_addr_copy(vif->bssid, bssid);
 122         else
 123                 eth_zero_addr(vif->bssid);
 124
 125         vif->iftype = mode;
 126 }
 127
 128 int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc)
 129 {
 130         int srcu_idx;
 131         u8 ret_val = 0;
 132         struct wilc_vif *vif;
 133
 134         srcu_idx = srcu_read_lock(&wilc->srcu);
 135         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 136                 if (!is_zero_ether_addr(vif->bssid))
 137                         ret_val++;
 138         }
 139         srcu_read_unlock(&wilc->srcu, srcu_idx);
 140         return ret_val;
 141 }
 142
 143 static int wilc_txq_task(void *vp)
 144 {
 145         int ret;
 146         u32 txq_count;
 147         struct wilc *wl = vp;
 148
 149         complete(&wl->txq_thread_started);
 150         while (1) {
 151                 if (wait_for_completion_interruptible(&wl->txq_event))
 152                         continue;
 153                 if (wl->close) {
 154                         complete(&wl->txq_thread_started);
 155
 156                         while (!kthread_should_stop())
 157                                 schedule();
 158                         break;
 159                 }
 160                 do {
 161                         ret = wilc_wlan_handle_txq(wl, &txq_count);
 162                         if (txq_count < FLOW_CONTROL_LOWER_THRESHOLD) {
 163                                 int srcu_idx;
 164                                 struct wilc_vif *ifc;
 165
 166                                 srcu_idx = srcu_read_lock(&wl->srcu);
 167                                 list_for_each_entry_rcu(ifc, &wl->vif_list,
 168                                                         list) {
 169                                         if (ifc->mac_opened &&
 170                                             netif_queue_stopped(ifc->ndev))
 171                                                 netif_wake_queue(ifc->ndev);
 172                                 }
 173                                 srcu_read_unlock(&wl->srcu, srcu_idx);
 174                         }
 175                         if (ret != WILC_VMM_ENTRY_FULL_RETRY)
 176                                 break;
 177                         /* Back off TX task from sending packets for some time.
 178                          * msleep_interruptible will allow RX task to run and
 179                          * free buffers. TX task will be in TASK_INTERRUPTIBLE
 180                          * state which will put the thread back to CPU running
 181                          * queue when it's signaled even if the timeout isn't
 182                          * elapsed. This gives faster chance for reserved SK
 183                          * buffers to be free.
 184                          */
 185                         msleep_interruptible(TX_BACKOFF_WEIGHT_MS);
 186                 } while (!wl->close);
 187         }
 188         return 0;
 189 }
 190
 191 static int wilc_wlan_get_firmware(struct net_device *dev)
 192 {
 193         struct wilc_vif *vif = netdev_priv(dev);
 194         struct wilc *wilc = vif->wilc;
 195         int chip_id;
 196         const struct firmware *wilc_fw;
 197         int ret;
 198
 199         chip_id = wilc_get_chipid(wilc, false);
 200
 201         netdev_info(dev, "ChipID [%x] loading firmware [%s]\n", chip_id,
 202                     WILC1000_FW(WILC1000_API_VER));
 203
 204         ret = reject_firmware(&wilc_fw, WILC1000_FW(WILC1000_API_VER),
 205                                wilc->dev);
 206         if (ret != 0) {
 207                 netdev_err(dev, "%s - firmware not available\n",
 208                            WILC1000_FW(WILC1000_API_VER));
 209                 return -EINVAL;
 210         }
 211         wilc->firmware = wilc_fw;
 212
 213         return 0;
 214 }
 215
 216 static int wilc_start_firmware(struct net_device *dev)
 217 {
 218         struct wilc_vif *vif = netdev_priv(dev);
 219         struct wilc *wilc = vif->wilc;
 220         int ret = 0;
 221
 222         ret = wilc_wlan_start(wilc);
 223         if (ret)
 224                 return ret;
 225
 226         if (!wait_for_completion_timeout(&wilc->sync_event,
 227                                          msecs_to_jiffies(5000)))
 228                 return -ETIME;
 229
 230         return 0;
 231 }
 232
 233 static int wilc1000_firmware_download(struct net_device *dev)
 234 {
 235         struct wilc_vif *vif = netdev_priv(dev);
 236         struct wilc *wilc = vif->wilc;
 237         int ret = 0;
 238
 239         if (!wilc->firmware) {
 240                 netdev_err(dev, "Firmware buffer is NULL\n");
 241                 return -ENOBUFS;
 242         }
 243
 244         ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
 245                                           wilc->firmware->size);
 246         if (ret)
 247                 return ret;
 248
 249         release_firmware(wilc->firmware);
 250         wilc->firmware = NULL;
 251
 252         netdev_dbg(dev, "Download Succeeded\n");
 253
 254         return 0;
 255 }
 256
 257 static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
 258 {
 259         struct wilc_priv *priv = &vif->priv;
 260         struct host_if_drv *hif_drv;
 261         u8 b;
 262         u16 hw;
 263         u32 w;
 264
 265         netdev_dbg(dev, "Start configuring Firmware\n");
 266         hif_drv = (struct host_if_drv *)priv->hif_drv;
 267         netdev_dbg(dev, "Host = %p\n", hif_drv);
 268
 269         w = vif->iftype;
 270         cpu_to_le32s(&w);
 271         if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
 272                                0, 0))
 273                 goto fail;
 274
 275         b = WILC_FW_BSS_TYPE_INFRA;
 276         if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
 277                 goto fail;
 278
 279         b = WILC_FW_TX_RATE_AUTO;
 280         if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
 281                 goto fail;
 282
 283         b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
 284         if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
 285                 goto fail;
 286
 287         b = WILC_FW_PREAMBLE_SHORT;
 288         if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
 289                 goto fail;
 290
 291         b = WILC_FW_11N_PROT_AUTO;
 292         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
 293                 goto fail;
 294
 295         b = WILC_FW_ACTIVE_SCAN;
 296         if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
 297                 goto fail;
 298
 299         b = WILC_FW_SITE_SURVEY_OFF;
 300         if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
 301                 goto fail;
 302
 303         hw = 0xffff;
 304         cpu_to_le16s(&hw);
 305         if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 306                 goto fail;
 307
 308         hw = 2346;
 309         cpu_to_le16s(&hw);
 310         if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 311                 goto fail;
 312
 313         b = 0;
 314         if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
 315                 goto fail;
 316
 317         b = 1;
 318         if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
 319                 goto fail;
 320
 321         b = WILC_FW_NO_POWERSAVE;
 322         if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
 323                 goto fail;
 324
 325         b = WILC_FW_SEC_NO;
 326         if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
 327                 goto fail;
 328
 329         b = WILC_FW_AUTH_OPEN_SYSTEM;
 330         if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
 331                 goto fail;
 332
 333         b = 3;
 334         if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
 335                 goto fail;
 336
 337         b = 3;
 338         if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
 339                 goto fail;
 340
 341         b = WILC_FW_ACK_POLICY_NORMAL;
 342         if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
 343                 goto fail;
 344
 345         b = 0;
 346         if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
 347                                0, 0))
 348                 goto fail;
 349
 350         b = 48;
 351         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
 352                 goto fail;
 353
 354         b = 28;
 355         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
 356                 goto fail;
 357
 358         hw = 100;
 359         cpu_to_le16s(&hw);
 360         if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
 361                 goto fail;
 362
 363         b = WILC_FW_REKEY_POLICY_DISABLE;
 364         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
 365                 goto fail;
 366
 367         w = 84600;
 368         cpu_to_le32s(&w);
 369         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
 370                 goto fail;
 371
 372         w = 500;
 373         cpu_to_le32s(&w);
 374         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
 375                                0))
 376                 goto fail;
 377
 378         b = 1;
 379         if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
 380                                0))
 381                 goto fail;
 382
 383         b = WILC_FW_ERP_PROT_SELF_CTS;
 384         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
 385                 goto fail;
 386
 387         b = 1;
 388         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
 389                 goto fail;
 390
 391         b = WILC_FW_11N_OP_MODE_HT_MIXED;
 392         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
 393                 goto fail;
 394
 395         b = 1;
 396         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
 397                 goto fail;
 398
 399         b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
 400         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
 401                                0, 0))
 402                 goto fail;
 403
 404         b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
 405         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
 406                 goto fail;
 407
 408         b = 0;
 409         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
 410                                0))
 411                 goto fail;
 412
 413         b = 7;
 414         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
 415                 goto fail;
 416
 417         b = 1;
 418         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
 419                                1, 1))
 420                 goto fail;
 421
 422         return 0;
 423
 424 fail:
 425         return -EINVAL;
 426 }
 427
 428 static void wlan_deinitialize_threads(struct net_device *dev)
 429 {
 430         struct wilc_vif *vif = netdev_priv(dev);
 431         struct wilc *wl = vif->wilc;
 432
 433         wl->close = 1;
 434
 435         complete(&wl->txq_event);
 436
 437         if (wl->txq_thread) {
 438                 kthread_stop(wl->txq_thread);
 439                 wl->txq_thread = NULL;
 440         }
 441 }
 442
 443 static void wilc_wlan_deinitialize(struct net_device *dev)
 444 {
 445         struct wilc_vif *vif = netdev_priv(dev);
 446         struct wilc *wl = vif->wilc;
 447
 448         if (!wl) {
 449                 netdev_err(dev, "wl is NULL\n");
 450                 return;
 451         }
 452
 453         if (wl->initialized) {
 454                 netdev_info(dev, "Deinitializing wilc1000...\n");
 455
 456                 if (!wl->dev_irq_num &&
 457                     wl->hif_func->disable_interrupt) {
 458                         mutex_lock(&wl->hif_cs);
 459                         wl->hif_func->disable_interrupt(wl);
 460                         mutex_unlock(&wl->hif_cs);
 461                 }
 462                 complete(&wl->txq_event);
 463
 464                 wlan_deinitialize_threads(dev);
 465                 deinit_irq(dev);
 466
 467                 wilc_wlan_stop(wl, vif);
 468                 wilc_wlan_cleanup(dev);
 469
 470                 wl->initialized = false;
 471
 472                 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
 473         } else {
 474                 netdev_dbg(dev, "wilc1000 is not initialized\n");
 475         }
 476 }
 477
 478 static int wlan_initialize_threads(struct net_device *dev)
 479 {
 480         struct wilc_vif *vif = netdev_priv(dev);
 481         struct wilc *wilc = vif->wilc;
 482
 483         wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
 484                                        "%s-tx", dev->name);
 485         if (IS_ERR(wilc->txq_thread)) {
 486                 netdev_err(dev, "couldn't create TXQ thread\n");
 487                 wilc->close = 1;
 488                 return PTR_ERR(wilc->txq_thread);
 489         }
 490         wait_for_completion(&wilc->txq_thread_started);
 491
 492         return 0;
 493 }
 494
 495 static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
 496 {
 497         int ret = 0;
 498         struct wilc *wl = vif->wilc;
 499
 500         if (!wl->initialized) {
 501                 wl->mac_status = WILC_MAC_STATUS_INIT;
 502                 wl->close = 0;
 503
 504                 ret = wilc_wlan_init(dev);
 505                 if (ret)
 506                         return ret;
 507
 508                 ret = wlan_initialize_threads(dev);
 509                 if (ret)
 510                         goto fail_wilc_wlan;
 511
 512                 if (wl->dev_irq_num && init_irq(dev)) {
 513                         ret = -EIO;
 514                         goto fail_threads;
 515                 }
 516
 517                 if (!wl->dev_irq_num &&
 518                     wl->hif_func->enable_interrupt &&
 519                     wl->hif_func->enable_interrupt(wl)) {
 520                         ret = -EIO;
 521                         goto fail_irq_init;
 522                 }
 523
 524                 ret = wilc_wlan_get_firmware(dev);
 525                 if (ret)
 526                         goto fail_irq_enable;
 527
 528                 ret = wilc1000_firmware_download(dev);
 529                 if (ret)
 530                         goto fail_irq_enable;
 531
 532                 ret = wilc_start_firmware(dev);
 533                 if (ret)
 534                         goto fail_irq_enable;
 535
 536                 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
 537                         int size;
 538                         char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
 539
 540                         size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
 541                                                      firmware_ver,
 542                                                      sizeof(firmware_ver));
 543                         firmware_ver[size] = '\0';
 544                         netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
 545                 }
 546
 547                 ret = wilc_init_fw_config(dev, vif);
 548                 if (ret) {
 549                         netdev_err(dev, "Failed to configure firmware\n");
 550                         goto fail_fw_start;
 551                 }
 552                 wl->initialized = true;
 553                 return 0;
 554
 555 fail_fw_start:
 556                 wilc_wlan_stop(wl, vif);
 557
 558 fail_irq_enable:
 559                 if (!wl->dev_irq_num &&
 560                     wl->hif_func->disable_interrupt)
 561                         wl->hif_func->disable_interrupt(wl);
 562 fail_irq_init:
 563                 if (wl->dev_irq_num)
 564                         deinit_irq(dev);
 565 fail_threads:
 566                 wlan_deinitialize_threads(dev);
 567 fail_wilc_wlan:
 568                 wilc_wlan_cleanup(dev);
 569                 netdev_err(dev, "WLAN initialization FAILED\n");
 570         } else {
 571                 netdev_dbg(dev, "wilc1000 already initialized\n");
 572         }
 573         return ret;
 574 }
 575
 576 static int mac_init_fn(struct net_device *ndev)
 577 {
 578         netif_start_queue(ndev);
 579         netif_stop_queue(ndev);
 580
 581         return 0;
 582 }
 583
 584 static int wilc_mac_open(struct net_device *ndev)
 585 {
 586         struct wilc_vif *vif = netdev_priv(ndev);
 587         struct wilc *wl = vif->wilc;
 588         int ret = 0;
 589         struct mgmt_frame_regs mgmt_regs = {};
 590         u8 addr[ETH_ALEN] __aligned(2);
 591
 592         if (!wl || !wl->dev) {
 593                 netdev_err(ndev, "device not ready\n");
 594                 return -ENODEV;
 595         }
 596
 597         netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
 598
 599         ret = wilc_init_host_int(ndev);
 600         if (ret)
 601                 return ret;
 602
 603         ret = wilc_wlan_initialize(ndev, vif);
 604         if (ret) {
 605                 wilc_deinit_host_int(ndev);
 606                 return ret;
 607         }
 608
 609         wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
 610                                 vif->idx);
 611
 612         if (is_valid_ether_addr(ndev->dev_addr)) {
 613                 ether_addr_copy(addr, ndev->dev_addr);
 614                 wilc_set_mac_address(vif, addr);
 615         } else {
 616                 wilc_get_mac_address(vif, addr);
 617                 eth_hw_addr_set(ndev, addr);
 618         }
 619         netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
 620
 621         if (!is_valid_ether_addr(ndev->dev_addr)) {
 622                 netdev_err(ndev, "Wrong MAC address\n");
 623                 wilc_deinit_host_int(ndev);
 624                 wilc_wlan_deinitialize(ndev);
 625                 return -EINVAL;
 626         }
 627
 628         mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
 629         /* so we detect a change */
 630         vif->mgmt_reg_stypes = 0;
 631         wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
 632                                              vif->ndev->ieee80211_ptr,
 633                                              &mgmt_regs);
 634         netif_wake_queue(ndev);
 635         wl->open_ifcs++;
 636         vif->mac_opened = 1;
 637         return 0;
 638 }
 639
 640 static struct net_device_stats *mac_stats(struct net_device *dev)
 641 {
 642         struct wilc_vif *vif = netdev_priv(dev);
 643
 644         return &vif->netstats;
 645 }
 646
 647 static int wilc_set_mac_addr(struct net_device *dev, void *p)
 648 {
 649         int result;
 650         struct wilc_vif *vif = netdev_priv(dev);
 651         struct wilc *wilc = vif->wilc;
 652         struct sockaddr *addr = (struct sockaddr *)p;
 653         unsigned char mac_addr[ETH_ALEN];
 654         struct wilc_vif *tmp_vif;
 655         int srcu_idx;
 656
 657         if (!is_valid_ether_addr(addr->sa_data))
 658                 return -EADDRNOTAVAIL;
 659
 660         if (!vif->mac_opened) {
 661                 eth_commit_mac_addr_change(dev, p);
 662                 return 0;
 663         }
 664
 665         /* Verify MAC Address is not already in use: */
 666
 667         srcu_idx = srcu_read_lock(&wilc->srcu);
 668         list_for_each_entry_rcu(tmp_vif, &wilc->vif_list, list) {
 669                 wilc_get_mac_address(tmp_vif, mac_addr);
 670                 if (ether_addr_equal(addr->sa_data, mac_addr)) {
 671                         if (vif != tmp_vif) {
 672                                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 673                                 return -EADDRNOTAVAIL;
 674                         }
 675                         srcu_read_unlock(&wilc->srcu, srcu_idx);
 676                         return 0;
 677                 }
 678         }
 679         srcu_read_unlock(&wilc->srcu, srcu_idx);
 680
 681         result = wilc_set_mac_address(vif, (u8 *)addr->sa_data);
 682         if (result)
 683                 return result;
 684
 685         eth_commit_mac_addr_change(dev, p);
 686         return result;
 687 }
 688
 689 static void wilc_set_multicast_list(struct net_device *dev)
 690 {
 691         struct netdev_hw_addr *ha;
 692         struct wilc_vif *vif = netdev_priv(dev);
 693         int i;
 694         u8 *mc_list;
 695         u8 *cur_mc;
 696
 697         if (dev->flags & IFF_PROMISC)
 698                 return;
 699
 700         if (dev->flags & IFF_ALLMULTI ||
 701             dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
 702                 wilc_setup_multicast_filter(vif, 0, 0, NULL);
 703                 return;
 704         }
 705
 706         if (dev->mc.count == 0) {
 707                 wilc_setup_multicast_filter(vif, 1, 0, NULL);
 708                 return;
 709         }
 710
 711         mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
 712         if (!mc_list)
 713                 return;
 714
 715         cur_mc = mc_list;
 716         i = 0;
 717         netdev_for_each_mc_addr(ha, dev) {
 718                 memcpy(cur_mc, ha->addr, ETH_ALEN);
 719                 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
 720                 i++;
 721                 cur_mc += ETH_ALEN;
 722         }
 723
 724         if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
 725                 kfree(mc_list);
 726 }
 727
 728 static void wilc_tx_complete(void *priv, int status)
 729 {
 730         struct tx_complete_data *pv_data = priv;
 731
 732         dev_kfree_skb(pv_data->skb);
 733         kfree(pv_data);
 734 }
 735
 736 netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
 737 {
 738         struct wilc_vif *vif = netdev_priv(ndev);
 739         struct wilc *wilc = vif->wilc;
 740         struct tx_complete_data *tx_data = NULL;
 741         int queue_count;
 742
 743         if (skb->dev != ndev) {
 744                 netdev_err(ndev, "Packet not destined to this device\n");
 745                 dev_kfree_skb(skb);
 746                 return NETDEV_TX_OK;
 747         }
 748
 749         tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
 750         if (!tx_data) {
 751                 dev_kfree_skb(skb);
 752                 netif_wake_queue(ndev);
 753                 return NETDEV_TX_OK;
 754         }
 755
 756         tx_data->buff = skb->data;
 757         tx_data->size = skb->len;
 758         tx_data->skb  = skb;
 759
 760         vif->netstats.tx_packets++;
 761         vif->netstats.tx_bytes += tx_data->size;
 762         queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
 763                                                 tx_data->buff, tx_data->size,
 764                                                 wilc_tx_complete);
 765
 766         if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
 767                 int srcu_idx;
 768                 struct wilc_vif *vif;
 769
 770                 srcu_idx = srcu_read_lock(&wilc->srcu);
 771                 list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 772                         if (vif->mac_opened)
 773                                 netif_stop_queue(vif->ndev);
 774                 }
 775                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 776         }
 777
 778         return NETDEV_TX_OK;
 779 }
 780
 781 static int wilc_mac_close(struct net_device *ndev)
 782 {
 783         struct wilc_vif *vif = netdev_priv(ndev);
 784         struct wilc *wl = vif->wilc;
 785
 786         netdev_dbg(ndev, "Mac close\n");
 787
 788         if (wl->open_ifcs > 0)
 789                 wl->open_ifcs--;
 790         else
 791                 return 0;
 792
 793         if (vif->ndev) {
 794                 netif_stop_queue(vif->ndev);
 795
 796                 wilc_handle_disconnect(vif);
 797                 wilc_deinit_host_int(vif->ndev);
 798         }
 799
 800         if (wl->open_ifcs == 0) {
 801                 netdev_dbg(ndev, "Deinitializing wilc1000\n");
 802                 wl->close = 1;
 803                 wilc_wlan_deinitialize(ndev);
 804         }
 805
 806         vif->mac_opened = 0;
 807
 808         return 0;
 809 }
 810
 811 void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
 812                        u32 pkt_offset)
 813 {
 814         unsigned int frame_len = 0;
 815         int stats;
 816         unsigned char *buff_to_send = NULL;
 817         struct sk_buff *skb;
 818         struct net_device *wilc_netdev;
 819         struct wilc_vif *vif;
 820
 821         if (!wilc)
 822                 return;
 823
 824         wilc_netdev = get_if_handler(wilc, buff);
 825         if (!wilc_netdev)
 826                 return;
 827
 828         buff += pkt_offset;
 829         vif = netdev_priv(wilc_netdev);
 830
 831         if (size > 0) {
 832                 frame_len = size;
 833                 buff_to_send = buff;
 834
 835                 skb = dev_alloc_skb(frame_len);
 836                 if (!skb)
 837                         return;
 838
 839                 skb->dev = wilc_netdev;
 840
 841                 skb_put_data(skb, buff_to_send, frame_len);
 842
 843                 skb->protocol = eth_type_trans(skb, wilc_netdev);
 844                 vif->netstats.rx_packets++;
 845                 vif->netstats.rx_bytes += frame_len;
 846                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 847                 stats = netif_rx(skb);
 848                 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
 849         }
 850 }
 851
 852 void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth)
 853 {
 854         int srcu_idx;
 855         struct wilc_vif *vif;
 856
 857         srcu_idx = srcu_read_lock(&wilc->srcu);
 858         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 859                 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff;
 860                 u16 type = le16_to_cpup((__le16 *)buff);
 861                 u32 type_bit = BIT(type >> 4);
 862                 u32 auth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
 863
 864                 if ((vif->mgmt_reg_stypes & auth_bit &&
 865                      ieee80211_is_auth(mgmt->frame_control)) &&
 866                     vif->iftype == WILC_STATION_MODE && is_auth) {
 867                         wilc_wfi_mgmt_frame_rx(vif, buff, size);
 868                         break;
 869                 }
 870
 871                 if (vif->priv.p2p_listen_state &&
 872                     vif->mgmt_reg_stypes & type_bit)
 873                         wilc_wfi_p2p_rx(vif, buff, size);
 874
 875                 if (vif->monitor_flag)
 876                         wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
 877         }
 878         srcu_read_unlock(&wilc->srcu, srcu_idx);
 879 }
 880
 881 static const struct net_device_ops wilc_netdev_ops = {
 882         .ndo_init = mac_init_fn,
 883         .ndo_open = wilc_mac_open,
 884         .ndo_stop = wilc_mac_close,
 885         .ndo_set_mac_address = wilc_set_mac_addr,
 886         .ndo_start_xmit = wilc_mac_xmit,
 887         .ndo_get_stats = mac_stats,
 888         .ndo_set_rx_mode  = wilc_set_multicast_list,
 889 };
 890
 891 void wilc_netdev_cleanup(struct wilc *wilc)
 892 {
 893         struct wilc_vif *vif, *vif_tmp;
 894
 895         if (!wilc)
 896                 return;
 897
 898         if (wilc->firmware) {
 899                 release_firmware(wilc->firmware);
 900                 wilc->firmware = NULL;
 901         }
 902
 903         list_for_each_entry_safe(vif, vif_tmp, &wilc->vif_list, list) {
 904                 mutex_lock(&wilc->vif_mutex);
 905                 list_del_rcu(&vif->list);
 906                 wilc->vif_num--;
 907                 mutex_unlock(&wilc->vif_mutex);
 908                 synchronize_srcu(&wilc->srcu);
 909                 if (vif->ndev)
 910                         unregister_netdev(vif->ndev);
 911         }
 912
 913         wilc_wfi_deinit_mon_interface(wilc, false);
 914         destroy_workqueue(wilc->hif_workqueue);
 915
 916         wilc_wlan_cfg_deinit(wilc);
 917         wlan_deinit_locks(wilc);
 918         wiphy_unregister(wilc->wiphy);
 919         wiphy_free(wilc->wiphy);
 920 }
 921 EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
 922
 923 static u8 wilc_get_available_idx(struct wilc *wl)
 924 {
 925         int idx = 0;
 926         struct wilc_vif *vif;
 927         int srcu_idx;
 928
 929         srcu_idx = srcu_read_lock(&wl->srcu);
 930         list_for_each_entry_rcu(vif, &wl->vif_list, list) {
 931                 if (vif->idx == 0)
 932                         idx = 1;
 933                 else
 934                         idx = 0;
 935         }
 936         srcu_read_unlock(&wl->srcu, srcu_idx);
 937         return idx;
 938 }
 939
 940 struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
 941                                       int vif_type, enum nl80211_iftype type,
 942                                       bool rtnl_locked)
 943 {
 944         struct net_device *ndev;
 945         struct wilc_vif *vif;
 946         int ret;
 947
 948         ndev = alloc_etherdev(sizeof(*vif));
 949         if (!ndev)
 950                 return ERR_PTR(-ENOMEM);
 951
 952         vif = netdev_priv(ndev);
 953         ndev->ieee80211_ptr = &vif->priv.wdev;
 954         strcpy(ndev->name, name);
 955         vif->wilc = wl;
 956         vif->ndev = ndev;
 957         ndev->ml_priv = vif;
 958
 959         ndev->netdev_ops = &wilc_netdev_ops;
 960
 961         SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
 962
 963         vif->priv.wdev.wiphy = wl->wiphy;
 964         vif->priv.wdev.netdev = ndev;
 965         vif->priv.wdev.iftype = type;
 966         vif->priv.dev = ndev;
 967
 968         if (rtnl_locked)
 969                 ret = cfg80211_register_netdevice(ndev);
 970         else
 971                 ret = register_netdev(ndev);
 972
 973         if (ret) {
 974                 ret = -EFAULT;
 975                 goto error;
 976         }
 977
 978         ndev->needs_free_netdev = true;
 979         vif->iftype = vif_type;
 980         vif->idx = wilc_get_available_idx(wl);
 981         vif->mac_opened = 0;
 982         mutex_lock(&wl->vif_mutex);
 983         list_add_tail_rcu(&vif->list, &wl->vif_list);
 984         wl->vif_num += 1;
 985         mutex_unlock(&wl->vif_mutex);
 986         synchronize_srcu(&wl->srcu);
 987
 988         return vif;
 989
 990 error:
 991         if (rtnl_locked)
 992                 cfg80211_unregister_netdevice(ndev);
 993         else
 994                 unregister_netdev(ndev);
 995         free_netdev(ndev);
 996         return ERR_PTR(ret);
 997 }
 998
 999 MODULE_DESCRIPTION("Atmel WILC1000 core wireless driver");
1000 MODULE_LICENSE("GPL");
1001 /*(DEBLOBBED)*/