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 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                 wait_for_completion(&wl->txq_event);
 152
 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 && ifc->ndev)
 170                                                 netif_wake_queue(ifc->ndev);
 171                                 }
 172                                 srcu_read_unlock(&wl->srcu, srcu_idx);
 173                         }
 174                 } while (ret == WILC_VMM_ENTRY_FULL_RETRY && !wl->close);
 175         }
 176         return 0;
 177 }
 178
 179 static int wilc_wlan_get_firmware(struct net_device *dev)
 180 {
 181         struct wilc_vif *vif = netdev_priv(dev);
 182         struct wilc *wilc = vif->wilc;
 183         int chip_id;
 184         const struct firmware *wilc_fw;
 185         int ret;
 186
 187         chip_id = wilc_get_chipid(wilc, false);
 188
 189         netdev_info(dev, "ChipID [%x] loading firmware [%s]\n", chip_id,
 190                     WILC1000_FW(WILC1000_API_VER));
 191
 192         ret = request_firmware(&wilc_fw, WILC1000_FW(WILC1000_API_VER),
 193                                wilc->dev);
 194         if (ret != 0) {
 195                 netdev_err(dev, "%s - firmware not available\n",
 196                            WILC1000_FW(WILC1000_API_VER));
 197                 return -EINVAL;
 198         }
 199         wilc->firmware = wilc_fw;
 200
 201         return 0;
 202 }
 203
 204 static int wilc_start_firmware(struct net_device *dev)
 205 {
 206         struct wilc_vif *vif = netdev_priv(dev);
 207         struct wilc *wilc = vif->wilc;
 208         int ret = 0;
 209
 210         ret = wilc_wlan_start(wilc);
 211         if (ret)
 212                 return ret;
 213
 214         if (!wait_for_completion_timeout(&wilc->sync_event,
 215                                          msecs_to_jiffies(5000)))
 216                 return -ETIME;
 217
 218         return 0;
 219 }
 220
 221 static int wilc1000_firmware_download(struct net_device *dev)
 222 {
 223         struct wilc_vif *vif = netdev_priv(dev);
 224         struct wilc *wilc = vif->wilc;
 225         int ret = 0;
 226
 227         if (!wilc->firmware) {
 228                 netdev_err(dev, "Firmware buffer is NULL\n");
 229                 return -ENOBUFS;
 230         }
 231
 232         ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
 233                                           wilc->firmware->size);
 234         if (ret)
 235                 return ret;
 236
 237         release_firmware(wilc->firmware);
 238         wilc->firmware = NULL;
 239
 240         netdev_dbg(dev, "Download Succeeded\n");
 241
 242         return 0;
 243 }
 244
 245 static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
 246 {
 247         struct wilc_priv *priv = &vif->priv;
 248         struct host_if_drv *hif_drv;
 249         u8 b;
 250         u16 hw;
 251         u32 w;
 252
 253         netdev_dbg(dev, "Start configuring Firmware\n");
 254         hif_drv = (struct host_if_drv *)priv->hif_drv;
 255         netdev_dbg(dev, "Host = %p\n", hif_drv);
 256
 257         w = vif->iftype;
 258         cpu_to_le32s(&w);
 259         if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
 260                                0, 0))
 261                 goto fail;
 262
 263         b = WILC_FW_BSS_TYPE_INFRA;
 264         if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
 265                 goto fail;
 266
 267         b = WILC_FW_TX_RATE_AUTO;
 268         if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
 269                 goto fail;
 270
 271         b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
 272         if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
 273                 goto fail;
 274
 275         b = WILC_FW_PREAMBLE_SHORT;
 276         if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
 277                 goto fail;
 278
 279         b = WILC_FW_11N_PROT_AUTO;
 280         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
 281                 goto fail;
 282
 283         b = WILC_FW_ACTIVE_SCAN;
 284         if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
 285                 goto fail;
 286
 287         b = WILC_FW_SITE_SURVEY_OFF;
 288         if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
 289                 goto fail;
 290
 291         hw = 0xffff;
 292         cpu_to_le16s(&hw);
 293         if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 294                 goto fail;
 295
 296         hw = 2346;
 297         cpu_to_le16s(&hw);
 298         if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 299                 goto fail;
 300
 301         b = 0;
 302         if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
 303                 goto fail;
 304
 305         b = 1;
 306         if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
 307                 goto fail;
 308
 309         b = WILC_FW_NO_POWERSAVE;
 310         if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
 311                 goto fail;
 312
 313         b = WILC_FW_SEC_NO;
 314         if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
 315                 goto fail;
 316
 317         b = WILC_FW_AUTH_OPEN_SYSTEM;
 318         if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
 319                 goto fail;
 320
 321         b = 3;
 322         if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
 323                 goto fail;
 324
 325         b = 3;
 326         if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
 327                 goto fail;
 328
 329         b = WILC_FW_ACK_POLICY_NORMAL;
 330         if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
 331                 goto fail;
 332
 333         b = 0;
 334         if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
 335                                0, 0))
 336                 goto fail;
 337
 338         b = 48;
 339         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
 340                 goto fail;
 341
 342         b = 28;
 343         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
 344                 goto fail;
 345
 346         hw = 100;
 347         cpu_to_le16s(&hw);
 348         if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
 349                 goto fail;
 350
 351         b = WILC_FW_REKEY_POLICY_DISABLE;
 352         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
 353                 goto fail;
 354
 355         w = 84600;
 356         cpu_to_le32s(&w);
 357         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
 358                 goto fail;
 359
 360         w = 500;
 361         cpu_to_le32s(&w);
 362         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
 363                                0))
 364                 goto fail;
 365
 366         b = 1;
 367         if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
 368                                0))
 369                 goto fail;
 370
 371         b = WILC_FW_ERP_PROT_SELF_CTS;
 372         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
 373                 goto fail;
 374
 375         b = 1;
 376         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
 377                 goto fail;
 378
 379         b = WILC_FW_11N_OP_MODE_HT_MIXED;
 380         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
 381                 goto fail;
 382
 383         b = 1;
 384         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
 385                 goto fail;
 386
 387         b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
 388         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
 389                                0, 0))
 390                 goto fail;
 391
 392         b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
 393         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
 394                 goto fail;
 395
 396         b = 0;
 397         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
 398                                0))
 399                 goto fail;
 400
 401         b = 7;
 402         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
 403                 goto fail;
 404
 405         b = 1;
 406         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
 407                                1, 1))
 408                 goto fail;
 409
 410         return 0;
 411
 412 fail:
 413         return -EINVAL;
 414 }
 415
 416 static void wlan_deinitialize_threads(struct net_device *dev)
 417 {
 418         struct wilc_vif *vif = netdev_priv(dev);
 419         struct wilc *wl = vif->wilc;
 420
 421         wl->close = 1;
 422
 423         complete(&wl->txq_event);
 424
 425         if (wl->txq_thread) {
 426                 kthread_stop(wl->txq_thread);
 427                 wl->txq_thread = NULL;
 428         }
 429 }
 430
 431 static void wilc_wlan_deinitialize(struct net_device *dev)
 432 {
 433         struct wilc_vif *vif = netdev_priv(dev);
 434         struct wilc *wl = vif->wilc;
 435
 436         if (!wl) {
 437                 netdev_err(dev, "wl is NULL\n");
 438                 return;
 439         }
 440
 441         if (wl->initialized) {
 442                 netdev_info(dev, "Deinitializing wilc1000...\n");
 443
 444                 if (!wl->dev_irq_num &&
 445                     wl->hif_func->disable_interrupt) {
 446                         mutex_lock(&wl->hif_cs);
 447                         wl->hif_func->disable_interrupt(wl);
 448                         mutex_unlock(&wl->hif_cs);
 449                 }
 450                 complete(&wl->txq_event);
 451
 452                 wlan_deinitialize_threads(dev);
 453                 deinit_irq(dev);
 454
 455                 wilc_wlan_stop(wl, vif);
 456                 wilc_wlan_cleanup(dev);
 457
 458                 wl->initialized = false;
 459
 460                 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
 461         } else {
 462                 netdev_dbg(dev, "wilc1000 is not initialized\n");
 463         }
 464 }
 465
 466 static int wlan_initialize_threads(struct net_device *dev)
 467 {
 468         struct wilc_vif *vif = netdev_priv(dev);
 469         struct wilc *wilc = vif->wilc;
 470
 471         wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
 472                                        "%s-tx", dev->name);
 473         if (IS_ERR(wilc->txq_thread)) {
 474                 netdev_err(dev, "couldn't create TXQ thread\n");
 475                 wilc->close = 1;
 476                 return PTR_ERR(wilc->txq_thread);
 477         }
 478         wait_for_completion(&wilc->txq_thread_started);
 479
 480         return 0;
 481 }
 482
 483 static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
 484 {
 485         int ret = 0;
 486         struct wilc *wl = vif->wilc;
 487
 488         if (!wl->initialized) {
 489                 wl->mac_status = WILC_MAC_STATUS_INIT;
 490                 wl->close = 0;
 491
 492                 ret = wilc_wlan_init(dev);
 493                 if (ret)
 494                         return ret;
 495
 496                 ret = wlan_initialize_threads(dev);
 497                 if (ret)
 498                         goto fail_wilc_wlan;
 499
 500                 if (wl->dev_irq_num && init_irq(dev)) {
 501                         ret = -EIO;
 502                         goto fail_threads;
 503                 }
 504
 505                 if (!wl->dev_irq_num &&
 506                     wl->hif_func->enable_interrupt &&
 507                     wl->hif_func->enable_interrupt(wl)) {
 508                         ret = -EIO;
 509                         goto fail_irq_init;
 510                 }
 511
 512                 ret = wilc_wlan_get_firmware(dev);
 513                 if (ret)
 514                         goto fail_irq_enable;
 515
 516                 ret = wilc1000_firmware_download(dev);
 517                 if (ret)
 518                         goto fail_irq_enable;
 519
 520                 ret = wilc_start_firmware(dev);
 521                 if (ret)
 522                         goto fail_irq_enable;
 523
 524                 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
 525                         int size;
 526                         char firmware_ver[WILC_MAX_FW_VERSION_STR_SIZE];
 527
 528                         size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
 529                                                      firmware_ver,
 530                                                      sizeof(firmware_ver));
 531                         firmware_ver[size] = '\0';
 532                         netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
 533                 }
 534
 535                 ret = wilc_init_fw_config(dev, vif);
 536                 if (ret) {
 537                         netdev_err(dev, "Failed to configure firmware\n");
 538                         goto fail_fw_start;
 539                 }
 540                 wl->initialized = true;
 541                 return 0;
 542
 543 fail_fw_start:
 544                 wilc_wlan_stop(wl, vif);
 545
 546 fail_irq_enable:
 547                 if (!wl->dev_irq_num &&
 548                     wl->hif_func->disable_interrupt)
 549                         wl->hif_func->disable_interrupt(wl);
 550 fail_irq_init:
 551                 if (wl->dev_irq_num)
 552                         deinit_irq(dev);
 553 fail_threads:
 554                 wlan_deinitialize_threads(dev);
 555 fail_wilc_wlan:
 556                 wilc_wlan_cleanup(dev);
 557                 netdev_err(dev, "WLAN initialization FAILED\n");
 558         } else {
 559                 netdev_dbg(dev, "wilc1000 already initialized\n");
 560         }
 561         return ret;
 562 }
 563
 564 static int mac_init_fn(struct net_device *ndev)
 565 {
 566         netif_start_queue(ndev);
 567         netif_stop_queue(ndev);
 568
 569         return 0;
 570 }
 571
 572 static int wilc_mac_open(struct net_device *ndev)
 573 {
 574         struct wilc_vif *vif = netdev_priv(ndev);
 575         struct wilc *wl = vif->wilc;
 576         int ret = 0;
 577         struct mgmt_frame_regs mgmt_regs = {};
 578         u8 addr[ETH_ALEN] __aligned(2);
 579
 580         if (!wl || !wl->dev) {
 581                 netdev_err(ndev, "device not ready\n");
 582                 return -ENODEV;
 583         }
 584
 585         netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
 586
 587         ret = wilc_init_host_int(ndev);
 588         if (ret)
 589                 return ret;
 590
 591         ret = wilc_wlan_initialize(ndev, vif);
 592         if (ret) {
 593                 wilc_deinit_host_int(ndev);
 594                 return ret;
 595         }
 596
 597         wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
 598                                 vif->idx);
 599
 600         if (is_valid_ether_addr(ndev->dev_addr)) {
 601                 ether_addr_copy(addr, ndev->dev_addr);
 602                 wilc_set_mac_address(vif, addr);
 603         } else {
 604                 wilc_get_mac_address(vif, addr);
 605                 eth_hw_addr_set(ndev, addr);
 606         }
 607         netdev_dbg(ndev, "Mac address: %pM\n", ndev->dev_addr);
 608
 609         if (!is_valid_ether_addr(ndev->dev_addr)) {
 610                 netdev_err(ndev, "Wrong MAC address\n");
 611                 wilc_deinit_host_int(ndev);
 612                 wilc_wlan_deinitialize(ndev);
 613                 return -EINVAL;
 614         }
 615
 616         mgmt_regs.interface_stypes = vif->mgmt_reg_stypes;
 617         /* so we detect a change */
 618         vif->mgmt_reg_stypes = 0;
 619         wilc_update_mgmt_frame_registrations(vif->ndev->ieee80211_ptr->wiphy,
 620                                              vif->ndev->ieee80211_ptr,
 621                                              &mgmt_regs);
 622         netif_wake_queue(ndev);
 623         wl->open_ifcs++;
 624         vif->mac_opened = 1;
 625         return 0;
 626 }
 627
 628 static struct net_device_stats *mac_stats(struct net_device *dev)
 629 {
 630         struct wilc_vif *vif = netdev_priv(dev);
 631
 632         return &vif->netstats;
 633 }
 634
 635 static int wilc_set_mac_addr(struct net_device *dev, void *p)
 636 {
 637         int result;
 638         struct wilc_vif *vif = netdev_priv(dev);
 639         struct wilc *wilc = vif->wilc;
 640         struct sockaddr *addr = (struct sockaddr *)p;
 641         unsigned char mac_addr[ETH_ALEN];
 642         struct wilc_vif *tmp_vif;
 643         int srcu_idx;
 644
 645         if (!is_valid_ether_addr(addr->sa_data))
 646                 return -EADDRNOTAVAIL;
 647
 648         if (!vif->mac_opened) {
 649                 eth_commit_mac_addr_change(dev, p);
 650                 return 0;
 651         }
 652
 653         /* Verify MAC Address is not already in use: */
 654
 655         srcu_idx = srcu_read_lock(&wilc->srcu);
 656         list_for_each_entry_rcu(tmp_vif, &wilc->vif_list, list) {
 657                 wilc_get_mac_address(tmp_vif, mac_addr);
 658                 if (ether_addr_equal(addr->sa_data, mac_addr)) {
 659                         if (vif != tmp_vif) {
 660                                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 661                                 return -EADDRNOTAVAIL;
 662                         }
 663                         srcu_read_unlock(&wilc->srcu, srcu_idx);
 664                         return 0;
 665                 }
 666         }
 667         srcu_read_unlock(&wilc->srcu, srcu_idx);
 668
 669         result = wilc_set_mac_address(vif, (u8 *)addr->sa_data);
 670         if (result)
 671                 return result;
 672
 673         eth_commit_mac_addr_change(dev, p);
 674         return result;
 675 }
 676
 677 static void wilc_set_multicast_list(struct net_device *dev)
 678 {
 679         struct netdev_hw_addr *ha;
 680         struct wilc_vif *vif = netdev_priv(dev);
 681         int i;
 682         u8 *mc_list;
 683         u8 *cur_mc;
 684
 685         if (dev->flags & IFF_PROMISC)
 686                 return;
 687
 688         if (dev->flags & IFF_ALLMULTI ||
 689             dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
 690                 wilc_setup_multicast_filter(vif, 0, 0, NULL);
 691                 return;
 692         }
 693
 694         if (dev->mc.count == 0) {
 695                 wilc_setup_multicast_filter(vif, 1, 0, NULL);
 696                 return;
 697         }
 698
 699         mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
 700         if (!mc_list)
 701                 return;
 702
 703         cur_mc = mc_list;
 704         i = 0;
 705         netdev_for_each_mc_addr(ha, dev) {
 706                 memcpy(cur_mc, ha->addr, ETH_ALEN);
 707                 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
 708                 i++;
 709                 cur_mc += ETH_ALEN;
 710         }
 711
 712         if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
 713                 kfree(mc_list);
 714 }
 715
 716 static void wilc_tx_complete(void *priv, int status)
 717 {
 718         struct tx_complete_data *pv_data = priv;
 719
 720         dev_kfree_skb(pv_data->skb);
 721         kfree(pv_data);
 722 }
 723
 724 netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
 725 {
 726         struct wilc_vif *vif = netdev_priv(ndev);
 727         struct wilc *wilc = vif->wilc;
 728         struct tx_complete_data *tx_data = NULL;
 729         int queue_count;
 730
 731         if (skb->dev != ndev) {
 732                 netdev_err(ndev, "Packet not destined to this device\n");
 733                 dev_kfree_skb(skb);
 734                 return NETDEV_TX_OK;
 735         }
 736
 737         tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
 738         if (!tx_data) {
 739                 dev_kfree_skb(skb);
 740                 netif_wake_queue(ndev);
 741                 return NETDEV_TX_OK;
 742         }
 743
 744         tx_data->buff = skb->data;
 745         tx_data->size = skb->len;
 746         tx_data->skb  = skb;
 747
 748         vif->netstats.tx_packets++;
 749         vif->netstats.tx_bytes += tx_data->size;
 750         queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
 751                                                 tx_data->buff, tx_data->size,
 752                                                 wilc_tx_complete);
 753
 754         if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
 755                 int srcu_idx;
 756                 struct wilc_vif *vif;
 757
 758                 srcu_idx = srcu_read_lock(&wilc->srcu);
 759                 list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 760                         if (vif->mac_opened)
 761                                 netif_stop_queue(vif->ndev);
 762                 }
 763                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 764         }
 765
 766         return NETDEV_TX_OK;
 767 }
 768
 769 static int wilc_mac_close(struct net_device *ndev)
 770 {
 771         struct wilc_vif *vif = netdev_priv(ndev);
 772         struct wilc *wl = vif->wilc;
 773
 774         netdev_dbg(ndev, "Mac close\n");
 775
 776         if (wl->open_ifcs > 0)
 777                 wl->open_ifcs--;
 778         else
 779                 return 0;
 780
 781         if (vif->ndev) {
 782                 netif_stop_queue(vif->ndev);
 783
 784                 wilc_handle_disconnect(vif);
 785                 wilc_deinit_host_int(vif->ndev);
 786         }
 787
 788         if (wl->open_ifcs == 0) {
 789                 netdev_dbg(ndev, "Deinitializing wilc1000\n");
 790                 wl->close = 1;
 791                 wilc_wlan_deinitialize(ndev);
 792         }
 793
 794         vif->mac_opened = 0;
 795
 796         return 0;
 797 }
 798
 799 void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
 800                        u32 pkt_offset)
 801 {
 802         unsigned int frame_len = 0;
 803         int stats;
 804         unsigned char *buff_to_send = NULL;
 805         struct sk_buff *skb;
 806         struct net_device *wilc_netdev;
 807         struct wilc_vif *vif;
 808
 809         if (!wilc)
 810                 return;
 811
 812         wilc_netdev = get_if_handler(wilc, buff);
 813         if (!wilc_netdev)
 814                 return;
 815
 816         buff += pkt_offset;
 817         vif = netdev_priv(wilc_netdev);
 818
 819         if (size > 0) {
 820                 frame_len = size;
 821                 buff_to_send = buff;
 822
 823                 skb = dev_alloc_skb(frame_len);
 824                 if (!skb)
 825                         return;
 826
 827                 skb->dev = wilc_netdev;
 828
 829                 skb_put_data(skb, buff_to_send, frame_len);
 830
 831                 skb->protocol = eth_type_trans(skb, wilc_netdev);
 832                 vif->netstats.rx_packets++;
 833                 vif->netstats.rx_bytes += frame_len;
 834                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 835                 stats = netif_rx(skb);
 836                 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
 837         }
 838 }
 839
 840 void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size, bool is_auth)
 841 {
 842         int srcu_idx;
 843         struct wilc_vif *vif;
 844
 845         srcu_idx = srcu_read_lock(&wilc->srcu);
 846         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 847                 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buff;
 848                 u16 type = le16_to_cpup((__le16 *)buff);
 849                 u32 type_bit = BIT(type >> 4);
 850                 u32 auth_bit = BIT(IEEE80211_STYPE_AUTH >> 4);
 851
 852                 if ((vif->mgmt_reg_stypes & auth_bit &&
 853                      ieee80211_is_auth(mgmt->frame_control)) &&
 854                     vif->iftype == WILC_STATION_MODE && is_auth) {
 855                         wilc_wfi_mgmt_frame_rx(vif, buff, size);
 856                         break;
 857                 }
 858
 859                 if (vif->priv.p2p_listen_state &&
 860                     vif->mgmt_reg_stypes & type_bit)
 861                         wilc_wfi_p2p_rx(vif, buff, size);
 862
 863                 if (vif->monitor_flag)
 864                         wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
 865         }
 866         srcu_read_unlock(&wilc->srcu, srcu_idx);
 867 }
 868
 869 static const struct net_device_ops wilc_netdev_ops = {
 870         .ndo_init = mac_init_fn,
 871         .ndo_open = wilc_mac_open,
 872         .ndo_stop = wilc_mac_close,
 873         .ndo_set_mac_address = wilc_set_mac_addr,
 874         .ndo_start_xmit = wilc_mac_xmit,
 875         .ndo_get_stats = mac_stats,
 876         .ndo_set_rx_mode  = wilc_set_multicast_list,
 877 };
 878
 879 void wilc_netdev_cleanup(struct wilc *wilc)
 880 {
 881         struct wilc_vif *vif;
 882         int srcu_idx, ifc_cnt = 0;
 883
 884         if (!wilc)
 885                 return;
 886
 887         if (wilc->firmware) {
 888                 release_firmware(wilc->firmware);
 889                 wilc->firmware = NULL;
 890         }
 891
 892         srcu_idx = srcu_read_lock(&wilc->srcu);
 893         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 894                 if (vif->ndev)
 895                         unregister_netdev(vif->ndev);
 896         }
 897         srcu_read_unlock(&wilc->srcu, srcu_idx);
 898
 899         wilc_wfi_deinit_mon_interface(wilc, false);
 900         destroy_workqueue(wilc->hif_workqueue);
 901
 902         while (ifc_cnt < WILC_NUM_CONCURRENT_IFC) {
 903                 mutex_lock(&wilc->vif_mutex);
 904                 if (wilc->vif_num <= 0) {
 905                         mutex_unlock(&wilc->vif_mutex);
 906                         break;
 907                 }
 908                 vif = wilc_get_wl_to_vif(wilc);
 909                 if (!IS_ERR(vif))
 910                         list_del_rcu(&vif->list);
 911
 912                 wilc->vif_num--;
 913                 mutex_unlock(&wilc->vif_mutex);
 914                 synchronize_srcu(&wilc->srcu);
 915                 ifc_cnt++;
 916         }
 917
 918         wilc_wlan_cfg_deinit(wilc);
 919         wlan_deinit_locks(wilc);
 920         wiphy_unregister(wilc->wiphy);
 921         wiphy_free(wilc->wiphy);
 922 }
 923 EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
 924
 925 static u8 wilc_get_available_idx(struct wilc *wl)
 926 {
 927         int idx = 0;
 928         struct wilc_vif *vif;
 929         int srcu_idx;
 930
 931         srcu_idx = srcu_read_lock(&wl->srcu);
 932         list_for_each_entry_rcu(vif, &wl->vif_list, list) {
 933                 if (vif->idx == 0)
 934                         idx = 1;
 935                 else
 936                         idx = 0;
 937         }
 938         srcu_read_unlock(&wl->srcu, srcu_idx);
 939         return idx;
 940 }
 941
 942 struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
 943                                       int vif_type, enum nl80211_iftype type,
 944                                       bool rtnl_locked)
 945 {
 946         struct net_device *ndev;
 947         struct wilc_vif *vif;
 948         int ret;
 949
 950         ndev = alloc_etherdev(sizeof(*vif));
 951         if (!ndev)
 952                 return ERR_PTR(-ENOMEM);
 953
 954         vif = netdev_priv(ndev);
 955         ndev->ieee80211_ptr = &vif->priv.wdev;
 956         strcpy(ndev->name, name);
 957         vif->wilc = wl;
 958         vif->ndev = ndev;
 959         ndev->ml_priv = vif;
 960
 961         ndev->netdev_ops = &wilc_netdev_ops;
 962
 963         SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
 964
 965         vif->priv.wdev.wiphy = wl->wiphy;
 966         vif->priv.wdev.netdev = ndev;
 967         vif->priv.wdev.iftype = type;
 968         vif->priv.dev = ndev;
 969
 970         if (rtnl_locked)
 971                 ret = cfg80211_register_netdevice(ndev);
 972         else
 973                 ret = register_netdev(ndev);
 974
 975         if (ret) {
 976                 ret = -EFAULT;
 977                 goto error;
 978         }
 979
 980         wl->hif_workqueue = alloc_ordered_workqueue("%s-wq", WQ_MEM_RECLAIM,
 981                                                     ndev->name);
 982         if (!wl->hif_workqueue) {
 983                 ret = -ENOMEM;
 984                 goto unregister_netdev;
 985         }
 986
 987         ndev->needs_free_netdev = true;
 988         vif->iftype = vif_type;
 989         vif->idx = wilc_get_available_idx(wl);
 990         vif->mac_opened = 0;
 991         mutex_lock(&wl->vif_mutex);
 992         list_add_tail_rcu(&vif->list, &wl->vif_list);
 993         wl->vif_num += 1;
 994         mutex_unlock(&wl->vif_mutex);
 995         synchronize_srcu(&wl->srcu);
 996
 997         return vif;
 998
 999 unregister_netdev:
1000         if (rtnl_locked)
1001                 cfg80211_unregister_netdevice(ndev);
1002         else
1003                 unregister_netdev(ndev);
1004   error:
1005         free_netdev(ndev);
1006         return ERR_PTR(ret);
1007 }
1008
1009 MODULE_LICENSE("GPL");
1010 MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));