blob: 4d29f8ebb39303266b1893d3395f1393a9e51b8e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* Purpose: handle WMAC/802.3/802.11 rx & tx functions
*
* Author: Lyndon Chen
*
* Date: May 20, 2003
*
* Functions:
* vnt_generate_tx_parameter - Generate tx dma required parameter.
* vnt_get_rsvtime- get frame reserved time
* vnt_fill_cts_head- fulfill CTS ctl header
*
* Revision History:
*
*/
#include <linux/etherdevice.h>
#include "device.h"
#include "rxtx.h"
#include "card.h"
#include "mac.h"
#include "rf.h"
#include "usbpipe.h"
static const u16 vnt_time_stampoff[2][MAX_RATE] = {
/* Long Preamble */
{384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},
/* Short Preamble */
{384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},
};
#define DATADUR_B 10
#define DATADUR_A 11
static const u8 vnt_phy_signal[] = {
0x00, /* RATE_1M */
0x01, /* RATE_2M */
0x02, /* RATE_5M */
0x03, /* RATE_11M */
0x8b, /* RATE_6M */
0x8f, /* RATE_9M */
0x8a, /* RATE_12M */
0x8e, /* RATE_18M */
0x89, /* RATE_24M */
0x8d, /* RATE_36M */
0x88, /* RATE_48M */
0x8c /* RATE_54M */
};
static struct vnt_usb_send_context
*vnt_get_free_context(struct vnt_private *priv)
{
struct vnt_usb_send_context *context = NULL;
int ii;
for (ii = 0; ii < priv->num_tx_context; ii++) {
if (!priv->tx_context[ii])
return NULL;
context = priv->tx_context[ii];
if (!context->in_use) {
context->in_use = true;
return context;
}
}
if (ii == priv->num_tx_context) {
dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
ieee80211_stop_queues(priv->hw);
}
return NULL;
}
/* Get Length, Service, and Signal fields of Phy for Tx */
static void vnt_get_phy_field(struct vnt_private *priv, u32 frame_length,
u16 tx_rate, u8 pkt_type,
struct vnt_phy_field *phy)
{
u32 bit_count;
u32 count = 0;
u32 tmp;
int ext_bit;
int i;
u8 mask = 0;
u8 preamble_type = priv->preamble_type;
bit_count = frame_length * 8;
ext_bit = false;
switch (tx_rate) {
case RATE_1M:
count = bit_count;
break;
case RATE_2M:
count = bit_count / 2;
break;
case RATE_5M:
count = DIV_ROUND_UP(bit_count * 10, 55);
break;
case RATE_11M:
count = bit_count / 11;
tmp = count * 11;
if (tmp != bit_count) {
count++;
if ((bit_count - tmp) <= 3)
ext_bit = true;
}
break;
}
if (tx_rate > RATE_11M) {
if (pkt_type == PK_TYPE_11A)
mask = BIT(4);
} else if (tx_rate > RATE_1M) {
if (preamble_type == PREAMBLE_SHORT)
mask = BIT(3);
}
i = tx_rate > RATE_54M ? RATE_54M : tx_rate;
phy->signal = vnt_phy_signal[i] | mask;
phy->service = 0x00;
if (pkt_type == PK_TYPE_11B) {
if (ext_bit)
phy->service |= 0x80;
phy->len = cpu_to_le16((u16)count);
} else {
phy->len = cpu_to_le16((u16)frame_length);
}
}
static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate)
{
return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2]
[rate % MAX_RATE]);
}
static __le16 vnt_rxtx_rsvtime_le16(struct vnt_usb_send_context *context)
{
struct vnt_private *priv = context->priv;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(context->skb);
struct ieee80211_rate *rate = ieee80211_get_tx_rate(priv->hw, info);
return ieee80211_generic_frame_duration(priv->hw,
info->control.vif, info->band,
context->frame_len,
rate);
}
static __le16 vnt_get_rts_duration(struct vnt_usb_send_context *context)
{
struct vnt_private *priv = context->priv;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(context->skb);
return ieee80211_rts_duration(priv->hw, priv->vif,
context->frame_len, info);
}
static __le16 vnt_get_cts_duration(struct vnt_usb_send_context *context)
{
struct vnt_private *priv = context->priv;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(context->skb);
return ieee80211_ctstoself_duration(priv->hw, priv->vif,
context->frame_len, info);
}
static void vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context,
struct vnt_tx_datahead_g *buf)
{
struct vnt_private *priv = tx_context->priv;
struct ieee80211_hdr *hdr =
(struct ieee80211_hdr *)tx_context->skb->data;
u32 frame_len = tx_context->frame_len;
u16 rate = tx_context->tx_rate;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a);
vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate,
PK_TYPE_11B, &buf->b);
/* Get Duration and TimeStamp */
buf->duration_a = hdr->duration_id;
buf->duration_b = hdr->duration_id;
buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate);
buf->time_stamp_off_b = vnt_time_stamp_off(priv,
priv->top_cck_basic_rate);
}
static void vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context,
struct vnt_tx_datahead_ab *buf)
{
struct vnt_private *priv = tx_context->priv;
struct ieee80211_hdr *hdr =
(struct ieee80211_hdr *)tx_context->skb->data;
u32 frame_len = tx_context->frame_len;
u16 rate = tx_context->tx_rate;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, frame_len, rate,
tx_context->pkt_type, &buf->ab);
/* Get Duration and TimeStampOff */
buf->duration = hdr->duration_id;
buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
}
static void vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context,
struct ieee80211_rts *rts, __le16 duration)
{
struct ieee80211_hdr *hdr =
(struct ieee80211_hdr *)tx_context->skb->data;
rts->duration = duration;
rts->frame_control =
cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS);
ether_addr_copy(rts->ra, hdr->addr1);
ether_addr_copy(rts->ta, hdr->addr2);
}
static void vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context,
struct vnt_rts_g *buf)
{
struct vnt_private *priv = tx_context->priv;
u16 rts_frame_len = 20;
vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate,
PK_TYPE_11B, &buf->b);
vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
tx_context->pkt_type, &buf->a);
buf->duration_bb = vnt_get_rts_duration(tx_context);
buf->duration_aa = buf->duration_bb;
buf->duration_ba = buf->duration_bb;
vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
vnt_rxtx_datahead_g(tx_context, &buf->data_head);
}
static void vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context,
struct vnt_rts_ab *buf)
{
struct vnt_private *priv = tx_context->priv;
u16 rts_frame_len = 20;
vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate,
tx_context->pkt_type, &buf->ab);
buf->duration = vnt_get_rts_duration(tx_context);
vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
}
static void vnt_fill_cts_head(struct vnt_usb_send_context *tx_context,
union vnt_tx_data_head *head)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_cts *buf = &head->cts_g;
u32 cts_frame_len = 14;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
PK_TYPE_11B, &buf->b);
/* Get CTSDuration_ba */
buf->duration_ba = vnt_get_cts_duration(tx_context);
/*Get CTS Frame body*/
buf->data.duration = buf->duration_ba;
buf->data.frame_control =
cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS);
ether_addr_copy(buf->data.ra, priv->current_net_addr);
vnt_rxtx_datahead_g(tx_context, &buf->data_head);
}
/* returns true if mic_hdr is needed */
static bool vnt_fill_txkey(struct vnt_tx_buffer *tx_buffer, struct sk_buff *skb)
{
struct vnt_tx_fifo_head *fifo = &tx_buffer->fifo_head;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_key_conf *tx_key = info->control.hw_key;
struct vnt_mic_hdr *mic_hdr;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
u64 pn64;
u16 payload_len = skb->len;
u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb));
/* strip header and icv len from payload */
payload_len -= ieee80211_get_hdrlen_from_skb(skb);
payload_len -= tx_key->icv_len;
switch (tx_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
memcpy(fifo->tx_key, iv, 3);
memcpy(fifo->tx_key + 3, tx_key->key, tx_key->keylen);
if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
memcpy(fifo->tx_key + 8, iv, 3);
memcpy(fifo->tx_key + 11,
tx_key->key, WLAN_KEY_LEN_WEP40);
}
fifo->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
break;
case WLAN_CIPHER_SUITE_TKIP:
ieee80211_get_tkip_p2k(tx_key, skb, fifo->tx_key);
fifo->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
break;
case WLAN_CIPHER_SUITE_CCMP:
if (info->control.use_cts_prot) {
if (info->control.use_rts)
mic_hdr = &tx_buffer->tx_head.tx_rts.tx.mic.hdr;
else
mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
} else {
mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
}
mic_hdr->id = 0x59;
mic_hdr->payload_len = cpu_to_be16(payload_len);
ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
pn64 = atomic64_read(&tx_key->tx_pn);
mic_hdr->ccmp_pn[5] = pn64;
mic_hdr->ccmp_pn[4] = pn64 >> 8;
mic_hdr->ccmp_pn[3] = pn64 >> 16;
mic_hdr->ccmp_pn[2] = pn64 >> 24;
mic_hdr->ccmp_pn[1] = pn64 >> 32;
mic_hdr->ccmp_pn[0] = pn64 >> 40;
if (ieee80211_has_a4(hdr->frame_control))
mic_hdr->hlen = cpu_to_be16(28);
else
mic_hdr->hlen = cpu_to_be16(22);
ether_addr_copy(mic_hdr->addr1, hdr->addr1);
ether_addr_copy(mic_hdr->addr2, hdr->addr2);
ether_addr_copy(mic_hdr->addr3, hdr->addr3);
mic_hdr->frame_control = cpu_to_le16(le16_to_cpu(hdr->frame_control) & 0xc78f);
mic_hdr->seq_ctrl = cpu_to_le16(le16_to_cpu(hdr->seq_ctrl) & 0xf);
if (ieee80211_has_a4(hdr->frame_control))
ether_addr_copy(mic_hdr->addr4, hdr->addr4);
memcpy(fifo->tx_key, tx_key->key, WLAN_KEY_LEN_CCMP);
fifo->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
return true;
default:
break;
}
return false;
}
static void vnt_rxtx_rts(struct vnt_usb_send_context *tx_context)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
struct vnt_tx_buffer *tx_buffer = tx_context->tx_buffer;
union vnt_tx_head *tx_head = &tx_buffer->tx_head;
struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
buf->rts_rrv_time_aa = vnt_get_rts_duration(tx_context);
buf->rts_rrv_time_ba = buf->rts_rrv_time_aa;
buf->rts_rrv_time_bb = buf->rts_rrv_time_aa;
buf->rrv_time_a = vnt_rxtx_rsvtime_le16(tx_context);
buf->rrv_time_b = buf->rrv_time_a;
if (info->control.hw_key) {
if (vnt_fill_txkey(tx_buffer, tx_context->skb))
head = &tx_head->tx_rts.tx.mic.head;
}
vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
}
static void vnt_rxtx_cts(struct vnt_usb_send_context *tx_context)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
struct vnt_tx_buffer *tx_buffer = tx_context->tx_buffer;
union vnt_tx_head *tx_head = &tx_buffer->tx_head;
struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
buf->rrv_time_a = vnt_rxtx_rsvtime_le16(tx_context);
buf->rrv_time_b = buf->rrv_time_a;
buf->cts_rrv_time_ba = vnt_get_cts_duration(tx_context);
if (info->control.hw_key) {
if (vnt_fill_txkey(tx_buffer, tx_context->skb))
head = &tx_head->tx_cts.tx.mic.head;
}
vnt_fill_cts_head(tx_context, head);
}
static void vnt_rxtx_ab(struct vnt_usb_send_context *tx_context)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
struct vnt_tx_buffer *tx_buffer = tx_context->tx_buffer;
union vnt_tx_head *tx_head = &tx_buffer->tx_head;
struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
buf->rrv_time = vnt_rxtx_rsvtime_le16(tx_context);
if (info->control.hw_key) {
if (vnt_fill_txkey(tx_buffer, tx_context->skb))
head = &tx_head->tx_ab.tx.mic.head;
}
if (info->control.use_rts) {
buf->rts_rrv_time = vnt_get_rts_duration(tx_context);
vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
return;
}
vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
}
static void vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_context->skb);
if (info->control.use_cts_prot) {
if (info->control.use_rts) {
vnt_rxtx_rts(tx_context);
return;
}
vnt_rxtx_cts(tx_context);
return;
}
vnt_rxtx_ab(tx_context);
}
static u16 vnt_get_hdr_size(struct ieee80211_tx_info *info)
{
u16 size = sizeof(struct vnt_tx_datahead_ab);
if (info->control.use_cts_prot) {
if (info->control.use_rts)
size = sizeof(struct vnt_rts_g);
else
size = sizeof(struct vnt_cts);
} else if (info->control.use_rts) {
size = sizeof(struct vnt_rts_ab);
}
if (info->control.hw_key) {
if (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP)
size += sizeof(struct vnt_mic_hdr);
}
/* Get rrv_time header */
if (info->control.use_cts_prot) {
if (info->control.use_rts)
size += sizeof(struct vnt_rrv_time_rts);
else
size += sizeof(struct vnt_rrv_time_cts);
} else {
size += sizeof(struct vnt_rrv_time_ab);
}
size += sizeof(struct vnt_tx_fifo_head);
return size;
}
int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *tx_rate = &info->control.rates[0];
struct ieee80211_rate *rate;
struct ieee80211_hdr *hdr;
struct vnt_tx_buffer *tx_buffer;
struct vnt_tx_fifo_head *tx_buffer_head;
struct vnt_usb_send_context *tx_context;
unsigned long flags;
u8 pkt_type;
hdr = (struct ieee80211_hdr *)(skb->data);
rate = ieee80211_get_tx_rate(priv->hw, info);
if (rate->hw_value > RATE_11M) {
if (info->band == NL80211_BAND_5GHZ) {
pkt_type = PK_TYPE_11A;
} else {
if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
if (priv->basic_rates & VNT_B_RATES)
pkt_type = PK_TYPE_11GB;
else
pkt_type = PK_TYPE_11GA;
} else {
pkt_type = PK_TYPE_11A;
}
}
} else {
pkt_type = PK_TYPE_11B;
}
spin_lock_irqsave(&priv->lock, flags);
tx_context = vnt_get_free_context(priv);
if (!tx_context) {
dev_dbg(&priv->usb->dev, "%s No free context\n", __func__);
spin_unlock_irqrestore(&priv->lock, flags);
return -ENOMEM;
}
tx_context->pkt_type = pkt_type;
tx_context->frame_len = skb->len + 4;
tx_context->tx_rate = rate->hw_value;
spin_unlock_irqrestore(&priv->lock, flags);
tx_context->skb = skb_clone(skb, GFP_ATOMIC);
if (!tx_context->skb) {
tx_context->in_use = false;
return -ENOMEM;
}
tx_buffer = skb_push(skb, vnt_get_hdr_size(info));
tx_context->tx_buffer = tx_buffer;
tx_buffer_head = &tx_buffer->fifo_head;
tx_context->type = CONTEXT_DATA_PACKET;
/*Set fifo controls */
if (pkt_type == PK_TYPE_11A)
tx_buffer_head->fifo_ctl = 0;
else if (pkt_type == PK_TYPE_11B)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B);
else if (pkt_type == PK_TYPE_11GB)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB);
else if (pkt_type == PK_TYPE_11GA)
tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA);
if (!ieee80211_is_data(hdr->frame_control)) {
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT |
FIFOCTL_ISDMA0);
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN);
tx_buffer_head->time_stamp =
cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us);
} else {
tx_buffer_head->time_stamp =
cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us);
}
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK);
if (ieee80211_has_retry(hdr->frame_control))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
if (info->control.use_rts)
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS);
if (ieee80211_has_a4(hdr->frame_control))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD);
tx_buffer_head->frag_ctl =
cpu_to_le16(ieee80211_hdrlen(hdr->frame_control) << 10);
if (info->control.hw_key)
tx_context->frame_len += info->control.hw_key->icv_len;
tx_buffer_head->current_rate = cpu_to_le16(rate->hw_value);
vnt_generate_tx_parameter(tx_context);
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
IEEE80211_SCTL_SEQ) >> 4;
spin_lock_irqsave(&priv->lock, flags);
if (vnt_tx_context(priv, tx_context, skb)) {
dev_kfree_skb(tx_context->skb);
spin_unlock_irqrestore(&priv->lock, flags);
return -EIO;
}
dev_kfree_skb(skb);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int vnt_beacon_xmit(struct vnt_private *priv, struct sk_buff *skb)
{
struct vnt_tx_short_buf_head *short_head;
struct ieee80211_tx_info *info;
struct vnt_usb_send_context *context;
struct ieee80211_mgmt *mgmt_hdr;
unsigned long flags;
u32 frame_size = skb->len + 4;
u16 current_rate;
spin_lock_irqsave(&priv->lock, flags);
context = vnt_get_free_context(priv);
if (!context) {
dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__);
spin_unlock_irqrestore(&priv->lock, flags);
return -ENOMEM;
}
context->skb = skb;
spin_unlock_irqrestore(&priv->lock, flags);
mgmt_hdr = (struct ieee80211_mgmt *)skb->data;
short_head = skb_push(skb, sizeof(*short_head));
if (priv->bb_type == BB_TYPE_11A) {
current_rate = RATE_6M;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, frame_size, current_rate,
PK_TYPE_11A, &short_head->ab);
/* Get TimeStampOff */
short_head->time_stamp_off =
vnt_time_stamp_off(priv, current_rate);
} else {
current_rate = RATE_1M;
short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B);
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, frame_size, current_rate,
PK_TYPE_11B, &short_head->ab);
/* Get TimeStampOff */
short_head->time_stamp_off =
vnt_time_stamp_off(priv, current_rate);
}
/* Get Duration */
short_head->duration = mgmt_hdr->duration;
/* time stamp always 0 */
mgmt_hdr->u.beacon.timestamp = 0;
info = IEEE80211_SKB_CB(skb);
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr;
hdr->duration_id = 0;
hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4);
}
priv->seq_counter++;
if (priv->seq_counter > 0x0fff)
priv->seq_counter = 0;
context->type = CONTEXT_BEACON_PACKET;
spin_lock_irqsave(&priv->lock, flags);
if (vnt_tx_context(priv, context, skb))
ieee80211_free_txskb(priv->hw, context->skb);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif)
{
struct sk_buff *beacon;
beacon = ieee80211_beacon_get(priv->hw, vif);
if (!beacon)
return -ENOMEM;
if (vnt_beacon_xmit(priv, beacon)) {
ieee80211_free_txskb(priv->hw, beacon);
return -ENODEV;
}
return 0;
}
int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif,
struct ieee80211_bss_conf *conf)
{
vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
vnt_mac_set_beacon_interval(priv, conf->beacon_int);
vnt_clear_current_tsf(priv);
vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
vnt_reset_next_tbtt(priv, conf->beacon_int);
return vnt_beacon_make(priv, vif);
}