cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

netdev.c (21965B)


      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
     26static 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
     37static 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
     51static 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
     70static 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
     80void 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
     93static 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->mode == WILC_STATION_MODE)
    101			if (ether_addr_equal_unaligned(h->addr2, vif->bssid)) {
    102				ndev = vif->ndev;
    103				goto out;
    104			}
    105		if (vif->mode == WILC_AP_MODE)
    106			if (ether_addr_equal_unaligned(h->addr1, vif->bssid)) {
    107				ndev = vif->ndev;
    108				goto out;
    109			}
    110	}
    111out:
    112	return ndev;
    113}
    114
    115void 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->mode = mode;
    126}
    127
    128int 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
    143static 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
    179static 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
    204static 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
    221static 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
    245static 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
    412fail:
    413	return -EINVAL;
    414}
    415
    416static 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
    431static 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
    466static 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 = 0;
    476		return PTR_ERR(wilc->txq_thread);
    477	}
    478	wait_for_completion(&wilc->txq_thread_started);
    479
    480	return 0;
    481}
    482
    483static 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
    543fail_fw_start:
    544		wilc_wlan_stop(wl, vif);
    545
    546fail_irq_enable:
    547		if (!wl->dev_irq_num &&
    548		    wl->hif_func->disable_interrupt)
    549			wl->hif_func->disable_interrupt(wl);
    550fail_irq_init:
    551		if (wl->dev_irq_num)
    552			deinit_irq(dev);
    553fail_threads:
    554		wlan_deinitialize_threads(dev);
    555fail_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
    564static 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
    572static 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
    628static 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
    635static 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
    677static 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
    716static 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
    724netdev_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		return NETDEV_TX_OK;
    734	}
    735
    736	tx_data = kmalloc(sizeof(*tx_data), GFP_ATOMIC);
    737	if (!tx_data) {
    738		dev_kfree_skb(skb);
    739		netif_wake_queue(ndev);
    740		return NETDEV_TX_OK;
    741	}
    742
    743	tx_data->buff = skb->data;
    744	tx_data->size = skb->len;
    745	tx_data->skb  = skb;
    746
    747	vif->netstats.tx_packets++;
    748	vif->netstats.tx_bytes += tx_data->size;
    749	queue_count = wilc_wlan_txq_add_net_pkt(ndev, tx_data,
    750						tx_data->buff, tx_data->size,
    751						wilc_tx_complete);
    752
    753	if (queue_count > FLOW_CONTROL_UPPER_THRESHOLD) {
    754		int srcu_idx;
    755		struct wilc_vif *vif;
    756
    757		srcu_idx = srcu_read_lock(&wilc->srcu);
    758		list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
    759			if (vif->mac_opened)
    760				netif_stop_queue(vif->ndev);
    761		}
    762		srcu_read_unlock(&wilc->srcu, srcu_idx);
    763	}
    764
    765	return NETDEV_TX_OK;
    766}
    767
    768static int wilc_mac_close(struct net_device *ndev)
    769{
    770	struct wilc_vif *vif = netdev_priv(ndev);
    771	struct wilc *wl = vif->wilc;
    772
    773	netdev_dbg(ndev, "Mac close\n");
    774
    775	if (wl->open_ifcs > 0)
    776		wl->open_ifcs--;
    777	else
    778		return 0;
    779
    780	if (vif->ndev) {
    781		netif_stop_queue(vif->ndev);
    782
    783		wilc_deinit_host_int(vif->ndev);
    784	}
    785
    786	if (wl->open_ifcs == 0) {
    787		netdev_dbg(ndev, "Deinitializing wilc1000\n");
    788		wl->close = 1;
    789		wilc_wlan_deinitialize(ndev);
    790	}
    791
    792	vif->mac_opened = 0;
    793
    794	return 0;
    795}
    796
    797void wilc_frmw_to_host(struct wilc *wilc, u8 *buff, u32 size,
    798		       u32 pkt_offset)
    799{
    800	unsigned int frame_len = 0;
    801	int stats;
    802	unsigned char *buff_to_send = NULL;
    803	struct sk_buff *skb;
    804	struct net_device *wilc_netdev;
    805	struct wilc_vif *vif;
    806
    807	if (!wilc)
    808		return;
    809
    810	wilc_netdev = get_if_handler(wilc, buff);
    811	if (!wilc_netdev)
    812		return;
    813
    814	buff += pkt_offset;
    815	vif = netdev_priv(wilc_netdev);
    816
    817	if (size > 0) {
    818		frame_len = size;
    819		buff_to_send = buff;
    820
    821		skb = dev_alloc_skb(frame_len);
    822		if (!skb)
    823			return;
    824
    825		skb->dev = wilc_netdev;
    826
    827		skb_put_data(skb, buff_to_send, frame_len);
    828
    829		skb->protocol = eth_type_trans(skb, wilc_netdev);
    830		vif->netstats.rx_packets++;
    831		vif->netstats.rx_bytes += frame_len;
    832		skb->ip_summed = CHECKSUM_UNNECESSARY;
    833		stats = netif_rx(skb);
    834		netdev_dbg(wilc_netdev, "netif_rx ret value is: %d\n", stats);
    835	}
    836}
    837
    838void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size)
    839{
    840	int srcu_idx;
    841	struct wilc_vif *vif;
    842
    843	srcu_idx = srcu_read_lock(&wilc->srcu);
    844	list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
    845		u16 type = le16_to_cpup((__le16 *)buff);
    846		u32 type_bit = BIT(type >> 4);
    847
    848		if (vif->priv.p2p_listen_state &&
    849		    vif->mgmt_reg_stypes & type_bit)
    850			wilc_wfi_p2p_rx(vif, buff, size);
    851
    852		if (vif->monitor_flag)
    853			wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
    854	}
    855	srcu_read_unlock(&wilc->srcu, srcu_idx);
    856}
    857
    858static const struct net_device_ops wilc_netdev_ops = {
    859	.ndo_init = mac_init_fn,
    860	.ndo_open = wilc_mac_open,
    861	.ndo_stop = wilc_mac_close,
    862	.ndo_set_mac_address = wilc_set_mac_addr,
    863	.ndo_start_xmit = wilc_mac_xmit,
    864	.ndo_get_stats = mac_stats,
    865	.ndo_set_rx_mode  = wilc_set_multicast_list,
    866};
    867
    868void wilc_netdev_cleanup(struct wilc *wilc)
    869{
    870	struct wilc_vif *vif;
    871	int srcu_idx, ifc_cnt = 0;
    872
    873	if (!wilc)
    874		return;
    875
    876	if (wilc->firmware) {
    877		release_firmware(wilc->firmware);
    878		wilc->firmware = NULL;
    879	}
    880
    881	srcu_idx = srcu_read_lock(&wilc->srcu);
    882	list_for_each_entry_rcu(vif, &wilc->vif_list, list) {
    883		if (vif->ndev)
    884			unregister_netdev(vif->ndev);
    885	}
    886	srcu_read_unlock(&wilc->srcu, srcu_idx);
    887
    888	wilc_wfi_deinit_mon_interface(wilc, false);
    889	destroy_workqueue(wilc->hif_workqueue);
    890
    891	while (ifc_cnt < WILC_NUM_CONCURRENT_IFC) {
    892		mutex_lock(&wilc->vif_mutex);
    893		if (wilc->vif_num <= 0) {
    894			mutex_unlock(&wilc->vif_mutex);
    895			break;
    896		}
    897		vif = wilc_get_wl_to_vif(wilc);
    898		if (!IS_ERR(vif))
    899			list_del_rcu(&vif->list);
    900
    901		wilc->vif_num--;
    902		mutex_unlock(&wilc->vif_mutex);
    903		synchronize_srcu(&wilc->srcu);
    904		ifc_cnt++;
    905	}
    906
    907	wilc_wlan_cfg_deinit(wilc);
    908	wlan_deinit_locks(wilc);
    909	wiphy_unregister(wilc->wiphy);
    910	wiphy_free(wilc->wiphy);
    911}
    912EXPORT_SYMBOL_GPL(wilc_netdev_cleanup);
    913
    914static u8 wilc_get_available_idx(struct wilc *wl)
    915{
    916	int idx = 0;
    917	struct wilc_vif *vif;
    918	int srcu_idx;
    919
    920	srcu_idx = srcu_read_lock(&wl->srcu);
    921	list_for_each_entry_rcu(vif, &wl->vif_list, list) {
    922		if (vif->idx == 0)
    923			idx = 1;
    924		else
    925			idx = 0;
    926	}
    927	srcu_read_unlock(&wl->srcu, srcu_idx);
    928	return idx;
    929}
    930
    931struct wilc_vif *wilc_netdev_ifc_init(struct wilc *wl, const char *name,
    932				      int vif_type, enum nl80211_iftype type,
    933				      bool rtnl_locked)
    934{
    935	struct net_device *ndev;
    936	struct wilc_vif *vif;
    937	int ret;
    938
    939	ndev = alloc_etherdev(sizeof(*vif));
    940	if (!ndev)
    941		return ERR_PTR(-ENOMEM);
    942
    943	vif = netdev_priv(ndev);
    944	ndev->ieee80211_ptr = &vif->priv.wdev;
    945	strcpy(ndev->name, name);
    946	vif->wilc = wl;
    947	vif->ndev = ndev;
    948	ndev->ml_priv = vif;
    949
    950	ndev->netdev_ops = &wilc_netdev_ops;
    951
    952	SET_NETDEV_DEV(ndev, wiphy_dev(wl->wiphy));
    953
    954	vif->priv.wdev.wiphy = wl->wiphy;
    955	vif->priv.wdev.netdev = ndev;
    956	vif->priv.wdev.iftype = type;
    957	vif->priv.dev = ndev;
    958
    959	if (rtnl_locked)
    960		ret = cfg80211_register_netdevice(ndev);
    961	else
    962		ret = register_netdev(ndev);
    963
    964	if (ret) {
    965		ret = -EFAULT;
    966		goto error;
    967	}
    968
    969	wl->hif_workqueue = alloc_ordered_workqueue("%s-wq", WQ_MEM_RECLAIM,
    970						    ndev->name);
    971	if (!wl->hif_workqueue) {
    972		ret = -ENOMEM;
    973		goto error;
    974	}
    975
    976	ndev->needs_free_netdev = true;
    977	vif->iftype = vif_type;
    978	vif->idx = wilc_get_available_idx(wl);
    979	vif->mac_opened = 0;
    980	mutex_lock(&wl->vif_mutex);
    981	list_add_tail_rcu(&vif->list, &wl->vif_list);
    982	wl->vif_num += 1;
    983	mutex_unlock(&wl->vif_mutex);
    984	synchronize_srcu(&wl->srcu);
    985
    986	return vif;
    987
    988  error:
    989	free_netdev(ndev);
    990	return ERR_PTR(ret);
    991}
    992
    993MODULE_LICENSE("GPL");
    994MODULE_FIRMWARE(WILC1000_FW(WILC1000_API_VER));