drivers/staging/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
  18 static irqreturn_t isr_uh_routine(int irq, void *user_data)
  19 {
  20         struct net_device *dev = user_data;
  21         struct wilc_vif *vif = netdev_priv(dev);
  22         struct wilc *wilc = vif->wilc;
  23
  24         if (wilc->close) {
  25                 netdev_err(dev, "Can't handle UH interrupt\n");
  26                 return IRQ_HANDLED;
  27         }
  28         return IRQ_WAKE_THREAD;
  29 }
  30
  31 static irqreturn_t isr_bh_routine(int irq, void *userdata)
  32 {
  33         struct net_device *dev = userdata;
  34         struct wilc_vif *vif = netdev_priv(userdata);
  35         struct wilc *wilc = vif->wilc;
  36
  37         if (wilc->close) {
  38                 netdev_err(dev, "Can't handle BH interrupt\n");
  39                 return IRQ_HANDLED;
  40         }
  41
  42         wilc_handle_isr(wilc);
  43
  44         return IRQ_HANDLED;
  45 }
  46
  47 static int init_irq(struct net_device *dev)
  48 {
  49         int ret = 0;
  50         struct wilc_vif *vif = netdev_priv(dev);
  51         struct wilc *wl = vif->wilc;
  52
  53         ret = gpiod_direction_input(wl->gpio_irq);
  54         if (ret) {
  55                 netdev_err(dev, "could not obtain gpio for WILC_INTR\n");
  56                 return ret;
  57         }
  58
  59         wl->dev_irq_num = gpiod_to_irq(wl->gpio_irq);
  60
  61         ret = request_threaded_irq(wl->dev_irq_num, isr_uh_routine,
  62                                    isr_bh_routine,
  63                                    IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
  64                                    "WILC_IRQ", dev);
  65         if (ret < 0)
  66                 netdev_err(dev, "Failed to request IRQ\n");
  67         else
  68                 netdev_dbg(dev, "IRQ request succeeded IRQ-NUM= %d\n",
  69                            wl->dev_irq_num);
  70
  71         return ret;
  72 }
  73
  74 static void deinit_irq(struct net_device *dev)
  75 {
  76         struct wilc_vif *vif = netdev_priv(dev);
  77         struct wilc *wilc = vif->wilc;
  78
  79         /* Deinitialize IRQ */
  80         if (wilc->dev_irq_num)
  81                 free_irq(wilc->dev_irq_num, wilc);
  82 }
  83
  84 void wilc_mac_indicate(struct wilc *wilc)
  85 {
  86         s8 status;
  87
  88         wilc_wlan_cfg_get_val(wilc, WID_STATUS, &status, 1);
  89         if (wilc->mac_status == WILC_MAC_STATUS_INIT) {
  90                 wilc->mac_status = status;
  91                 complete(&wilc->sync_event);
  92         } else {
  93                 wilc->mac_status = status;
  94         }
  95 }
  96
  97 static struct net_device *get_if_handler(struct wilc *wilc, u8 *mac_header)
  98 {
  99         struct net_device *ndev = NULL;
 100         struct wilc_vif *vif;
 101         struct ieee80211_hdr *h = (struct ieee80211_hdr *)mac_header;
 102
 103         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 104                 if (vif->mode == WILC_STATION_MODE)
 105                         if (ether_addr_equal_unaligned(h->addr2, vif->bssid)) {
 106                                 ndev = vif->ndev;
 107                                 goto out;
 108                         }
 109                 if (vif->mode == WILC_AP_MODE)
 110                         if (ether_addr_equal_unaligned(h->addr1, vif->bssid)) {
 111                                 ndev = vif->ndev;
 112                                 goto out;
 113                         }
 114         }
 115 out:
 116         return ndev;
 117 }
 118
 119 void wilc_wlan_set_bssid(struct net_device *wilc_netdev, u8 *bssid, u8 mode)
 120 {
 121         struct wilc_vif *vif = netdev_priv(wilc_netdev);
 122
 123         if (bssid)
 124                 ether_addr_copy(vif->bssid, bssid);
 125         else
 126                 eth_zero_addr(vif->bssid);
 127
 128         vif->mode = mode;
 129 }
 130
 131 int wilc_wlan_get_num_conn_ifcs(struct wilc *wilc)
 132 {
 133         int srcu_idx;
 134         u8 ret_val = 0;
 135         struct wilc_vif *vif;
 136
 137         srcu_idx = srcu_read_lock(&wilc->srcu);
 138         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 139                 if (!is_zero_ether_addr(vif->bssid))
 140                         ret_val++;
 141         }
 142         srcu_read_unlock(&wilc->srcu, srcu_idx);
 143         return ret_val;
 144 }
 145
 146 static int wilc_txq_task(void *vp)
 147 {
 148         int ret;
 149         u32 txq_count;
 150         struct wilc *wl = vp;
 151
 152         complete(&wl->txq_thread_started);
 153         while (1) {
 154                 wait_for_completion(&wl->txq_event);
 155
 156                 if (wl->close) {
 157                         complete(&wl->txq_thread_started);
 158
 159                         while (!kthread_should_stop())
 160                                 schedule();
 161                         break;
 162                 }
 163                 do {
 164                         ret = wilc_wlan_handle_txq(wl, &txq_count);
 165                         if (txq_count < FLOW_CONTROL_LOWER_THRESHOLD) {
 166                                 int srcu_idx;
 167                                 struct wilc_vif *ifc;
 168
 169                                 srcu_idx = srcu_read_lock(&wl->srcu);
 170                                 list_for_each_entry_rcu(ifc, &wl->vif_list,
 171                                                         list) {
 172                                         if (ifc->mac_opened && ifc->ndev)
 173                                                 netif_wake_queue(ifc->ndev);
 174                                 }
 175                                 srcu_read_unlock(&wl->srcu, srcu_idx);
 176                         }
 177                 } while (ret == WILC_VMM_ENTRY_FULL_RETRY && !wl->close);
 178         }
 179         return 0;
 180 }
 181
 182 static int wilc_wlan_get_firmware(struct net_device *dev)
 183 {
 184         struct wilc_vif *vif = netdev_priv(dev);
 185         struct wilc *wilc = vif->wilc;
 186         int chip_id;
 187         const struct firmware *wilc_firmware;
 188         char *firmware;
 189
 190         chip_id = wilc_get_chipid(wilc, false);
 191
 192         if (chip_id < 0x1003a0)
 193                 firmware = FIRMWARE_1002;
 194         else
 195                 firmware = FIRMWARE_1003;
 196
 197         netdev_info(dev, "loading firmware %s\n", firmware);
 198
 199         if (request_firmware(&wilc_firmware, firmware, wilc->dev) != 0) {
 200                 netdev_err(dev, "%s - firmware not available\n", firmware);
 201                 return -EINVAL;
 202         }
 203         wilc->firmware = wilc_firmware;
 204
 205         return 0;
 206 }
 207
 208 static int wilc_start_firmware(struct net_device *dev)
 209 {
 210         struct wilc_vif *vif = netdev_priv(dev);
 211         struct wilc *wilc = vif->wilc;
 212         int ret = 0;
 213
 214         ret = wilc_wlan_start(wilc);
 215         if (ret)
 216                 return ret;
 217
 218         if (!wait_for_completion_timeout(&wilc->sync_event,
 219                                          msecs_to_jiffies(5000)))
 220                 return -ETIME;
 221
 222         return 0;
 223 }
 224
 225 static int wilc1000_firmware_download(struct net_device *dev)
 226 {
 227         struct wilc_vif *vif = netdev_priv(dev);
 228         struct wilc *wilc = vif->wilc;
 229         int ret = 0;
 230
 231         if (!wilc->firmware) {
 232                 netdev_err(dev, "Firmware buffer is NULL\n");
 233                 return -ENOBUFS;
 234         }
 235
 236         ret = wilc_wlan_firmware_download(wilc, wilc->firmware->data,
 237                                           wilc->firmware->size);
 238         if (ret)
 239                 return ret;
 240
 241         release_firmware(wilc->firmware);
 242         wilc->firmware = NULL;
 243
 244         netdev_dbg(dev, "Download Succeeded\n");
 245
 246         return 0;
 247 }
 248
 249 static int wilc_init_fw_config(struct net_device *dev, struct wilc_vif *vif)
 250 {
 251         struct wilc_priv *priv = &vif->priv;
 252         struct host_if_drv *hif_drv;
 253         u8 b;
 254         u16 hw;
 255         u32 w;
 256
 257         netdev_dbg(dev, "Start configuring Firmware\n");
 258         hif_drv = (struct host_if_drv *)priv->hif_drv;
 259         netdev_dbg(dev, "Host = %p\n", hif_drv);
 260
 261         w = vif->iftype;
 262         cpu_to_le32s(&w);
 263         if (!wilc_wlan_cfg_set(vif, 1, WID_SET_OPERATION_MODE, (u8 *)&w, 4,
 264                                0, 0))
 265                 goto fail;
 266
 267         b = WILC_FW_BSS_TYPE_INFRA;
 268         if (!wilc_wlan_cfg_set(vif, 0, WID_BSS_TYPE, &b, 1, 0, 0))
 269                 goto fail;
 270
 271         b = WILC_FW_TX_RATE_AUTO;
 272         if (!wilc_wlan_cfg_set(vif, 0, WID_CURRENT_TX_RATE, &b, 1, 0, 0))
 273                 goto fail;
 274
 275         b = WILC_FW_OPER_MODE_G_MIXED_11B_2;
 276         if (!wilc_wlan_cfg_set(vif, 0, WID_11G_OPERATING_MODE, &b, 1, 0, 0))
 277                 goto fail;
 278
 279         b = WILC_FW_PREAMBLE_SHORT;
 280         if (!wilc_wlan_cfg_set(vif, 0, WID_PREAMBLE, &b, 1, 0, 0))
 281                 goto fail;
 282
 283         b = WILC_FW_11N_PROT_AUTO;
 284         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_PROT_MECH, &b, 1, 0, 0))
 285                 goto fail;
 286
 287         b = WILC_FW_ACTIVE_SCAN;
 288         if (!wilc_wlan_cfg_set(vif, 0, WID_SCAN_TYPE, &b, 1, 0, 0))
 289                 goto fail;
 290
 291         b = WILC_FW_SITE_SURVEY_OFF;
 292         if (!wilc_wlan_cfg_set(vif, 0, WID_SITE_SURVEY, &b, 1, 0, 0))
 293                 goto fail;
 294
 295         hw = 0xffff;
 296         cpu_to_le16s(&hw);
 297         if (!wilc_wlan_cfg_set(vif, 0, WID_RTS_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 298                 goto fail;
 299
 300         hw = 2346;
 301         cpu_to_le16s(&hw);
 302         if (!wilc_wlan_cfg_set(vif, 0, WID_FRAG_THRESHOLD, (u8 *)&hw, 2, 0, 0))
 303                 goto fail;
 304
 305         b = 0;
 306         if (!wilc_wlan_cfg_set(vif, 0, WID_BCAST_SSID, &b, 1, 0, 0))
 307                 goto fail;
 308
 309         b = 1;
 310         if (!wilc_wlan_cfg_set(vif, 0, WID_QOS_ENABLE, &b, 1, 0, 0))
 311                 goto fail;
 312
 313         b = WILC_FW_NO_POWERSAVE;
 314         if (!wilc_wlan_cfg_set(vif, 0, WID_POWER_MANAGEMENT, &b, 1, 0, 0))
 315                 goto fail;
 316
 317         b = WILC_FW_SEC_NO;
 318         if (!wilc_wlan_cfg_set(vif, 0, WID_11I_MODE, &b, 1, 0, 0))
 319                 goto fail;
 320
 321         b = WILC_FW_AUTH_OPEN_SYSTEM;
 322         if (!wilc_wlan_cfg_set(vif, 0, WID_AUTH_TYPE, &b, 1, 0, 0))
 323                 goto fail;
 324
 325         b = 3;
 326         if (!wilc_wlan_cfg_set(vif, 0, WID_LISTEN_INTERVAL, &b, 1, 0, 0))
 327                 goto fail;
 328
 329         b = 3;
 330         if (!wilc_wlan_cfg_set(vif, 0, WID_DTIM_PERIOD, &b, 1, 0, 0))
 331                 goto fail;
 332
 333         b = WILC_FW_ACK_POLICY_NORMAL;
 334         if (!wilc_wlan_cfg_set(vif, 0, WID_ACK_POLICY, &b, 1, 0, 0))
 335                 goto fail;
 336
 337         b = 0;
 338         if (!wilc_wlan_cfg_set(vif, 0, WID_USER_CONTROL_ON_TX_POWER, &b, 1,
 339                                0, 0))
 340                 goto fail;
 341
 342         b = 48;
 343         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11A, &b, 1, 0, 0))
 344                 goto fail;
 345
 346         b = 28;
 347         if (!wilc_wlan_cfg_set(vif, 0, WID_TX_POWER_LEVEL_11B, &b, 1, 0, 0))
 348                 goto fail;
 349
 350         hw = 100;
 351         cpu_to_le16s(&hw);
 352         if (!wilc_wlan_cfg_set(vif, 0, WID_BEACON_INTERVAL, (u8 *)&hw, 2, 0, 0))
 353                 goto fail;
 354
 355         b = WILC_FW_REKEY_POLICY_DISABLE;
 356         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_POLICY, &b, 1, 0, 0))
 357                 goto fail;
 358
 359         w = 84600;
 360         cpu_to_le32s(&w);
 361         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PERIOD, (u8 *)&w, 4, 0, 0))
 362                 goto fail;
 363
 364         w = 500;
 365         cpu_to_le32s(&w);
 366         if (!wilc_wlan_cfg_set(vif, 0, WID_REKEY_PACKET_COUNT, (u8 *)&w, 4, 0,
 367                                0))
 368                 goto fail;
 369
 370         b = 1;
 371         if (!wilc_wlan_cfg_set(vif, 0, WID_SHORT_SLOT_ALLOWED, &b, 1, 0,
 372                                0))
 373                 goto fail;
 374
 375         b = WILC_FW_ERP_PROT_SELF_CTS;
 376         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ERP_PROT_TYPE, &b, 1, 0, 0))
 377                 goto fail;
 378
 379         b = 1;
 380         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_ENABLE, &b, 1, 0, 0))
 381                 goto fail;
 382
 383         b = WILC_FW_11N_OP_MODE_HT_MIXED;
 384         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OPERATING_MODE, &b, 1, 0, 0))
 385                 goto fail;
 386
 387         b = 1;
 388         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_TXOP_PROT_DISABLE, &b, 1, 0, 0))
 389                 goto fail;
 390
 391         b = WILC_FW_OBBS_NONHT_DETECT_PROTECT_REPORT;
 392         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_OBSS_NONHT_DETECTION, &b, 1,
 393                                0, 0))
 394                 goto fail;
 395
 396         b = WILC_FW_HT_PROT_RTS_CTS_NONHT;
 397         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_HT_PROT_TYPE, &b, 1, 0, 0))
 398                 goto fail;
 399
 400         b = 0;
 401         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_RIFS_PROT_ENABLE, &b, 1, 0,
 402                                0))
 403                 goto fail;
 404
 405         b = 7;
 406         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_CURRENT_TX_MCS, &b, 1, 0, 0))
 407                 goto fail;
 408
 409         b = 1;
 410         if (!wilc_wlan_cfg_set(vif, 0, WID_11N_IMMEDIATE_BA_ENABLED, &b, 1,
 411                                1, 1))
 412                 goto fail;
 413
 414         return 0;
 415
 416 fail:
 417         return -EINVAL;
 418 }
 419
 420 static void wlan_deinitialize_threads(struct net_device *dev)
 421 {
 422         struct wilc_vif *vif = netdev_priv(dev);
 423         struct wilc *wl = vif->wilc;
 424
 425         wl->close = 1;
 426
 427         complete(&wl->txq_event);
 428
 429         if (wl->txq_thread) {
 430                 kthread_stop(wl->txq_thread);
 431                 wl->txq_thread = NULL;
 432         }
 433 }
 434
 435 static void wilc_wlan_deinitialize(struct net_device *dev)
 436 {
 437         struct wilc_vif *vif = netdev_priv(dev);
 438         struct wilc *wl = vif->wilc;
 439
 440         if (!wl) {
 441                 netdev_err(dev, "wl is NULL\n");
 442                 return;
 443         }
 444
 445         if (wl->initialized) {
 446                 netdev_info(dev, "Deinitializing wilc1000...\n");
 447
 448                 if (!wl->dev_irq_num &&
 449                     wl->hif_func->disable_interrupt) {
 450                         mutex_lock(&wl->hif_cs);
 451                         wl->hif_func->disable_interrupt(wl);
 452                         mutex_unlock(&wl->hif_cs);
 453                 }
 454                 complete(&wl->txq_event);
 455
 456                 wlan_deinitialize_threads(dev);
 457                 deinit_irq(dev);
 458
 459                 wilc_wlan_stop(wl, vif);
 460                 wilc_wlan_cleanup(dev);
 461
 462                 wl->initialized = false;
 463
 464                 netdev_dbg(dev, "wilc1000 deinitialization Done\n");
 465         } else {
 466                 netdev_dbg(dev, "wilc1000 is not initialized\n");
 467         }
 468 }
 469
 470 static int wlan_initialize_threads(struct net_device *dev)
 471 {
 472         struct wilc_vif *vif = netdev_priv(dev);
 473         struct wilc *wilc = vif->wilc;
 474
 475         wilc->txq_thread = kthread_run(wilc_txq_task, (void *)wilc,
 476                                        "K_TXQ_TASK");
 477         if (IS_ERR(wilc->txq_thread)) {
 478                 netdev_err(dev, "couldn't create TXQ thread\n");
 479                 wilc->close = 0;
 480                 return PTR_ERR(wilc->txq_thread);
 481         }
 482         wait_for_completion(&wilc->txq_thread_started);
 483
 484         return 0;
 485 }
 486
 487 static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif)
 488 {
 489         int ret = 0;
 490         struct wilc *wl = vif->wilc;
 491
 492         if (!wl->initialized) {
 493                 wl->mac_status = WILC_MAC_STATUS_INIT;
 494                 wl->close = 0;
 495
 496                 ret = wilc_wlan_init(dev);
 497                 if (ret)
 498                         return ret;
 499
 500                 ret = wlan_initialize_threads(dev);
 501                 if (ret)
 502                         goto fail_wilc_wlan;
 503
 504                 if (wl->gpio_irq && init_irq(dev)) {
 505                         ret = -EIO;
 506                         goto fail_threads;
 507                 }
 508
 509                 if (!wl->dev_irq_num &&
 510                     wl->hif_func->enable_interrupt &&
 511                     wl->hif_func->enable_interrupt(wl)) {
 512                         ret = -EIO;
 513                         goto fail_irq_init;
 514                 }
 515
 516                 ret = wilc_wlan_get_firmware(dev);
 517                 if (ret)
 518                         goto fail_irq_enable;
 519
 520                 ret = wilc1000_firmware_download(dev);
 521                 if (ret)
 522                         goto fail_irq_enable;
 523
 524                 ret = wilc_start_firmware(dev);
 525                 if (ret)
 526                         goto fail_irq_enable;
 527
 528                 if (wilc_wlan_cfg_get(vif, 1, WID_FIRMWARE_VERSION, 1, 0)) {
 529                         int size;
 530                         char firmware_ver[20];
 531
 532                         size = wilc_wlan_cfg_get_val(wl, WID_FIRMWARE_VERSION,
 533                                                      firmware_ver,
 534                                                      sizeof(firmware_ver));
 535                         firmware_ver[size] = '\0';
 536                         netdev_dbg(dev, "Firmware Ver = %s\n", firmware_ver);
 537                 }
 538
 539                 ret = wilc_init_fw_config(dev, vif);
 540                 if (ret) {
 541                         netdev_err(dev, "Failed to configure firmware\n");
 542                         goto fail_fw_start;
 543                 }
 544                 wl->initialized = true;
 545                 return 0;
 546
 547 fail_fw_start:
 548                 wilc_wlan_stop(wl, vif);
 549
 550 fail_irq_enable:
 551                 if (!wl->dev_irq_num &&
 552                     wl->hif_func->disable_interrupt)
 553                         wl->hif_func->disable_interrupt(wl);
 554 fail_irq_init:
 555                 if (wl->dev_irq_num)
 556                         deinit_irq(dev);
 557 fail_threads:
 558                 wlan_deinitialize_threads(dev);
 559 fail_wilc_wlan:
 560                 wilc_wlan_cleanup(dev);
 561                 netdev_err(dev, "WLAN initialization FAILED\n");
 562         } else {
 563                 netdev_dbg(dev, "wilc1000 already initialized\n");
 564         }
 565         return ret;
 566 }
 567
 568 static int mac_init_fn(struct net_device *ndev)
 569 {
 570         netif_start_queue(ndev);
 571         netif_stop_queue(ndev);
 572
 573         return 0;
 574 }
 575
 576 static int wilc_mac_open(struct net_device *ndev)
 577 {
 578         struct wilc_vif *vif = netdev_priv(ndev);
 579         struct wilc *wl = vif->wilc;
 580         struct wilc_priv *priv = wdev_priv(vif->ndev->ieee80211_ptr);
 581         unsigned char mac_add[ETH_ALEN] = {0};
 582         int ret = 0;
 583
 584         if (!wl || !wl->dev) {
 585                 netdev_err(ndev, "device not ready\n");
 586                 return -ENODEV;
 587         }
 588
 589         netdev_dbg(ndev, "MAC OPEN[%p]\n", ndev);
 590
 591         ret = wilc_init_host_int(ndev);
 592         if (ret)
 593                 return ret;
 594
 595         ret = wilc_wlan_initialize(ndev, vif);
 596         if (ret) {
 597                 wilc_deinit_host_int(ndev);
 598                 return ret;
 599         }
 600
 601         wilc_set_operation_mode(vif, wilc_get_vif_idx(vif), vif->iftype,
 602                                 vif->idx);
 603         wilc_get_mac_address(vif, mac_add);
 604         netdev_dbg(ndev, "Mac address: %pM\n", mac_add);
 605         ether_addr_copy(ndev->dev_addr, mac_add);
 606
 607         if (!is_valid_ether_addr(ndev->dev_addr)) {
 608                 netdev_err(ndev, "Wrong MAC address\n");
 609                 wilc_deinit_host_int(ndev);
 610                 wilc_wlan_deinitialize(ndev);
 611                 return -EINVAL;
 612         }
 613
 614         wilc_mgmt_frame_register(vif->ndev->ieee80211_ptr->wiphy,
 615                                  vif->ndev->ieee80211_ptr,
 616                                  vif->frame_reg[0].type,
 617                                  vif->frame_reg[0].reg);
 618         wilc_mgmt_frame_register(vif->ndev->ieee80211_ptr->wiphy,
 619                                  vif->ndev->ieee80211_ptr,
 620                                  vif->frame_reg[1].type,
 621                                  vif->frame_reg[1].reg);
 622         netif_wake_queue(ndev);
 623         wl->open_ifcs++;
 624         priv->p2p.local_random = 0x01;
 625         vif->mac_opened = 1;
 626         return 0;
 627 }
 628
 629 static struct net_device_stats *mac_stats(struct net_device *dev)
 630 {
 631         struct wilc_vif *vif = netdev_priv(dev);
 632
 633         return &vif->netstats;
 634 }
 635
 636 static void wilc_set_multicast_list(struct net_device *dev)
 637 {
 638         struct netdev_hw_addr *ha;
 639         struct wilc_vif *vif = netdev_priv(dev);
 640         int i;
 641         u8 *mc_list;
 642         u8 *cur_mc;
 643
 644         if (dev->flags & IFF_PROMISC)
 645                 return;
 646
 647         if (dev->flags & IFF_ALLMULTI ||
 648             dev->mc.count > WILC_MULTICAST_TABLE_SIZE) {
 649                 wilc_setup_multicast_filter(vif, 0, 0, NULL);
 650                 return;
 651         }
 652
 653         if (dev->mc.count == 0) {
 654                 wilc_setup_multicast_filter(vif, 1, 0, NULL);
 655                 return;
 656         }
 657
 658         mc_list = kmalloc_array(dev->mc.count, ETH_ALEN, GFP_ATOMIC);
 659         if (!mc_list)
 660                 return;
 661
 662         cur_mc = mc_list;
 663         i = 0;
 664         netdev_for_each_mc_addr(ha, dev) {
 665                 memcpy(cur_mc, ha->addr, ETH_ALEN);
 666                 netdev_dbg(dev, "Entry[%d]: %pM\n", i, cur_mc);
 667                 i++;
 668                 cur_mc += ETH_ALEN;
 669         }
 670
 671         if (wilc_setup_multicast_filter(vif, 1, dev->mc.count, mc_list))
 672                 kfree(mc_list);
 673 }
 674
 675 static void wilc_tx_complete(void *priv, int status)
 676 {
 677         struct tx_complete_data *pv_data = priv;
 678
 679         dev_kfree_skb(pv_data->skb);
 680         kfree(pv_data);
 681 }
 682
 683 netdev_tx_t wilc_mac_xmit(struct sk_buff *skb, struct net_device *ndev)
 684 {
 685         struct wilc_vif *vif = netdev_priv(ndev);
 686         struct wilc *wilc = vif->wilc;
 687         struct tx_complete_data *tx_data = NULL;
 688         int queue_count;
 689
 690         if (skb->dev != ndev) {
 691                 netdev_err(ndev, "Packet not destined to this device\n");
 692                 return 0;
 693         }
 694
 695         tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
 696         if (!tx_data) {
 697                 dev_kfree_skb(skb);
 698                 netif_wake_queue(ndev);
 699                 return 0;
 700         }
 701
 702         tx_data->buff = skb->data;
 703         tx_data->size = skb->len;
 704         tx_data->skb  = skb;
 705
 706         vif->netstats.tx_packets++;
 707         vif->netstats.tx_bytes += tx_data->size;
 708         queue_count = wilc_wlan_txq_add_net_pkt(ndev, (void *)tx_data,
 709                                                 tx_data->buff, tx_data->size,
 710                                                 wilc_tx_complete);
 711
 712         if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
 713                 int srcu_idx;
 714                 struct wilc_vif *vif;
 715
 716                 srcu_idx = srcu_read_lock(&wilc->srcu);
 717                 list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 718                         if (vif->mac_opened)
 719                                 netif_stop_queue(vif->ndev);
 720                 }
 721                 srcu_read_unlock(&wilc->srcu, srcu_idx);
 722         }
 723
 724         return 0;
 725 }
 726
 727 static int wilc_mac_close(struct net_device *ndev)
 728 {
 729         struct wilc_vif *vif = netdev_priv(ndev);
 730         struct wilc *wl = vif->wilc;
 731
 732         netdev_dbg(ndev, "Mac close\n");
 733
 734         if (wl->open_ifcs > 0)
 735                 wl->open_ifcs--;
 736         else
 737                 return 0;
 738
 739         if (vif->ndev) {
 740                 netif_stop_queue(vif->ndev);
 741
 742                 wilc_deinit_host_int(vif->ndev);
 743         }
 744
 745         if (wl->open_ifcs == 0) {
 746                 netdev_dbg(ndev, "Deinitializing wilc1000\n");
 747                 wl->close = 1;
 748                 wilc_wlan_deinitialize(ndev);
 749         }
 750
 751         vif->mac_opened = 0;
 752
 753         return 0;
 754 }
 755
 756 void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
 757                        u32 pkt_offset)
 758 {
 759         unsigned int frame_len = 0;
 760         int stats;
 761         unsigned char *buff_to_send = NULL;
 762         struct sk_buff *skb;
 763         struct net_device *wilc_netdev;
 764         struct wilc_vif *vif;
 765
 766         if (!wilc)
 767                 return;
 768
 769         wilc_netdev = get_if_handler(wilc, buff);
 770         if (!wilc_netdev)
 771                 return;
 772
 773         buff += pkt_offset;
 774         vif = netdev_priv(wilc_netdev);
 775
 776         if (size > 0) {
 777                 frame_len = size;
 778                 buff_to_send = buff;
 779
 780                 skb = dev_alloc_skb(frame_len);
 781                 if (!skb)
 782                         return;
 783
 784                 skb->dev = wilc_netdev;
 785
 786                 skb_put_data(skb, buff_to_send, frame_len);
 787
 788                 skb->protocol = eth_type_trans(skb, wilc_netdev);
 789                 vif->netstats.rx_packets++;
 790                 vif->netstats.rx_bytes += frame_len;
 791                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 792                 stats = netif_rx(skb);
 793                 netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
 794         }
 795 }
 796
 797 void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size)
 798 {
 799         int srcu_idx;
 800         struct wilc_vif *vif;
 801
 802         srcu_idx = srcu_read_lock(&wilc->srcu);
 803         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 804                 u16 type = le16_to_cpup((__le16 *)buff);
 805
 806                 if (vif->priv.p2p_listen_state &&
 807                     ((type == vif->frame_reg[0].type && vif->frame_reg[0].reg) ||
 808                      (type == vif->frame_reg[1].type && vif->frame_reg[1].reg)))
 809                         wilc_wfi_p2p_rx(vif, buff, size);
 810
 811                 if (vif->monitor_flag)
 812                         wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
 813         }
 814         srcu_read_unlock(&wilc->srcu, srcu_idx);
 815 }
 816
 817 static const struct net_device_ops wilc_netdev_ops = {
 818         .ndo_init = mac_init_fn,
 819         .ndo_open = wilc_mac_open,
 820         .ndo_stop = wilc_mac_close,
 821         .ndo_start_xmit = wilc_mac_xmit,
 822         .ndo_get_stats = mac_stats,
 823         .ndo_set_rx_mode  = wilc_set_multicast_list,
 824 };
 825
 826 void wilc_netdev_cleanup(struct wilc *wilc)
 827 {
 828         struct wilc_vif *vif;
 829         int srcu_idx, ifc_cnt = 0;
 830
 831         if (!wilc)
 832                 return;
 833
 834         if (wilc->firmware) {
 835                 release_firmware(wilc->firmware);
 836                 wilc->firmware = NULL;
 837         }
 838
 839         srcu_idx = srcu_read_lock(&wilc->srcu);
 840         list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
 841                 if (vif->ndev)
 842                         unregister_netdev(vif->ndev);
 843         }
 844         srcu_read_unlock(&wilc->srcu, srcu_idx);
 845
 846         wilc_wfi_deinit_mon_interface(wilc, false);
 847         flush_workqueue(wilc->hif_workqueue);
 848         destroy_workqueue(wilc->hif_workqueue);
 849
 850         while (ifc_cnt < WILC_NUM_CONCURRENT_IFC) {
 851                 mutex_lock(&wilc->vif_mutex);
 852                 if (wilc->vif_num <= 0) {
 853                         mutex_unlock(&wilc->vif_mutex);
 854                         break;
 855                 }
 856                 vif = wilc_get_wl_to_vif(wilc);
 857                 if (!IS_ERR(vif))
 858                         list_del_rcu(&vif->list);
 859
 860                 wilc->vif_num--;
 861                 mutex_unlock(&wilc->vif_mutex);
 862                 synchronize_srcu(&wilc->srcu);
 863                 ifc_cnt++;
 864         }
 865
 866         wilc_wlan_cfg_deinit(wilc);
 867         wlan_deinit_locks(wilc);
 868         kfree(wilc->bus_data);
 869         wiphy_unregister(wilc->wiphy);
 870         wiphy_free(wilc->wiphy);
 871 }
 872 EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
 873
 874 static u8 wilc_get_available_idx(struct wilc *wl)
 875 {
 876         int idx = 0;
 877         struct wilc_vif *vif;
 878         int srcu_idx;
 879
 880         srcu_idx = srcu_read_lock(&wl->srcu);
 881         list_for_each_entry_rcu(vif, &wl->vif_list, list) {
 882                 if (vif->idx == 0)
 883                         idx = 1;
 884                 else
 885                         idx = 0;
 886         }
 887         srcu_read_unlock(&wl->srcu, srcu_idx);
 888         return idx;
 889 }
 890
 891 struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
 892                                       int vif_type, enum nl80211_iftype type,
 893                                       bool rtnl_locked)
 894 {
 895         struct net_device *ndev;
 896         struct wilc_vif *vif;
 897         int ret;
 898
 899         ndev = alloc_etherdev(sizeof(*vif));
 900         if (!ndev)
 901                 return ERR_PTR(-ENOMEM);
 902
 903         vif = netdev_priv(ndev);
 904         ndev->ieee80211_ptr = &vif->priv.wdev;
 905         strcpy(ndev->name, name);
 906         vif->wilc = wl;
 907         vif->ndev = ndev;
 908         ndev->ml_priv = vif;
 909
 910         ndev->netdev_ops = &wilc_netdev_ops;
 911
 912         SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
 913
 914         vif->priv.wdev.wiphy = wl->wiphy;
 915         vif->priv.wdev.netdev = ndev;
 916         vif->priv.wdev.iftype = type;
 917         vif->priv.dev = ndev;
 918
 919         if (rtnl_locked)
 920                 ret = register_netdevice(ndev);
 921         else
 922                 ret = register_netdev(ndev);
 923
 924         if (ret) {
 925                 free_netdev(ndev);
 926                 return ERR_PTR(-EFAULT);
 927         }
 928
 929         ndev->needs_free_netdev = true;
 930         vif->iftype = vif_type;
 931         vif->idx = wilc_get_available_idx(wl);
 932         vif->mac_opened = 0;
 933         mutex_lock(&wl->vif_mutex);
 934         list_add_tail_rcu(&vif->list, &wl->vif_list);
 935         wl->vif_num += 1;
 936         mutex_unlock(&wl->vif_mutex);
 937         synchronize_srcu(&wl->srcu);
 938
 939         return vif;
 940 }
 941
 942 MODULE_LICENSE("GPL");