- 根目录:
- drivers
- staging
- vt6656
- rxtx.c
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* File: rxtx.c
*
* 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_duration_le - get tx data required duration
* vnt_get_rtscts_duration_le- get rtx/cts required duration
* vnt_get_rtscts_rsvtime_le- get rts/cts reserved time
* 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] = {
{384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */
{384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */
};
static const u16 vnt_fb_opt0[2][5] = {
{RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */
{RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */
};
static const u16 vnt_fb_opt1[2][5] = {
{RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */
{RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */
};
#define RTSDUR_BB 0
#define RTSDUR_BA 1
#define RTSDUR_AA 2
#define CTSDUR_BA 3
#define RTSDUR_BA_F0 4
#define RTSDUR_AA_F0 5
#define RTSDUR_BA_F1 6
#define RTSDUR_AA_F1 7
#define CTSDUR_BA_F0 8
#define CTSDUR_BA_F1 9
#define DATADUR_B 10
#define DATADUR_A 11
#define DATADUR_A_F0 12
#define DATADUR_A_F1 13
static struct vnt_usb_send_context
*vnt_get_free_context(struct vnt_private *priv)
{
struct vnt_usb_send_context *context = NULL;
int ii;
dev_dbg(&priv->usb->dev, "%s\n", __func__);
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 == false) {
context->in_use = true;
memset(context->data, 0,
MAX_TOTAL_SIZE_WITH_ALL_HEADERS);
context->hdr = NULL;
return context;
}
}
if (ii == priv->num_tx_context)
dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__);
return NULL;
}
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 u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type,
u32 frame_length, u16 rate, int need_ack)
{
u32 data_time, ack_time;
data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
frame_length, rate);
if (pkt_type == PK_TYPE_11B)
ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, (u16)priv->top_cck_basic_rate);
else
ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, (u16)priv->top_ofdm_basic_rate);
if (need_ack)
return data_time + priv->sifs + ack_time;
return data_time;
}
static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type,
u32 frame_length, u16 rate, int need_ack)
{
return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type,
frame_length, rate, need_ack));
}
static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv,
u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate)
{
u32 rrv_time, rts_time, cts_time, ack_time, data_time;
rrv_time = rts_time = cts_time = ack_time = data_time = 0;
data_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
frame_length, current_rate);
if (rsv_type == 0) {
rts_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 20, priv->top_cck_basic_rate);
cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14, priv->top_cck_basic_rate);
} else if (rsv_type == 1) {
rts_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 20, priv->top_cck_basic_rate);
cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_cck_basic_rate);
ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_ofdm_basic_rate);
} else if (rsv_type == 2) {
rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
20, priv->top_ofdm_basic_rate);
cts_time = ack_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14, priv->top_ofdm_basic_rate);
} else if (rsv_type == 3) {
cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_cck_basic_rate);
ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type,
14, priv->top_ofdm_basic_rate);
rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs;
return cpu_to_le16((u16)rrv_time);
}
rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs;
return cpu_to_le16((u16)rrv_time);
}
static __le16 vnt_get_duration_le(struct vnt_private *priv,
u8 pkt_type, int need_ack)
{
u32 ack_time = 0;
if (need_ack) {
if (pkt_type == PK_TYPE_11B)
ack_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14, priv->top_cck_basic_rate);
else
ack_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14, priv->top_ofdm_basic_rate);
return cpu_to_le16((u16)(priv->sifs + ack_time));
}
return 0;
}
static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context,
u8 dur_type, u8 pkt_type, u16 rate)
{
struct vnt_private *priv = context->priv;
u32 cts_time = 0, dur_time = 0;
u32 frame_length = context->frame_len;
u8 need_ack = context->need_ack;
switch (dur_type) {
case RTSDUR_BB:
case RTSDUR_BA:
case RTSDUR_BA_F0:
case RTSDUR_BA_F1:
cts_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14, priv->top_cck_basic_rate);
dur_time = cts_time + 2 * priv->sifs +
vnt_get_rsvtime(priv, pkt_type,
frame_length, rate, need_ack);
break;
case RTSDUR_AA:
case RTSDUR_AA_F0:
case RTSDUR_AA_F1:
cts_time = vnt_get_frame_time(priv->preamble_type,
pkt_type, 14, priv->top_ofdm_basic_rate);
dur_time = cts_time + 2 * priv->sifs +
vnt_get_rsvtime(priv, pkt_type,
frame_length, rate, need_ack);
break;
case CTSDUR_BA:
case CTSDUR_BA_F0:
case CTSDUR_BA_F1:
dur_time = priv->sifs + vnt_get_rsvtime(priv,
pkt_type, frame_length, rate, need_ack);
break;
default:
break;
}
return cpu_to_le16((u16)dur_time);
}
static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context,
struct ieee80211_hdr *hdr)
{
u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head);
u8 *hdr_pos = (u8 *)hdr;
tx_context->hdr = hdr;
if (!tx_context->hdr)
return 0;
return (u16)(hdr_pos - head);
}
static u16 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;
u8 need_ack = tx_context->need_ack;
/* 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 */
if (ieee80211_is_pspoll(hdr->frame_control)) {
__le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
buf->duration_a = dur;
buf->duration_b = dur;
} else {
buf->duration_a = vnt_get_duration_le(priv,
tx_context->pkt_type, need_ack);
buf->duration_b = vnt_get_duration_le(priv,
PK_TYPE_11B, need_ack);
}
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);
tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
return le16_to_cpu(buf->duration_a);
}
static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context,
struct vnt_tx_datahead_g_fb *buf)
{
struct vnt_private *priv = tx_context->priv;
u32 frame_len = tx_context->frame_len;
u16 rate = tx_context->tx_rate;
u8 need_ack = tx_context->need_ack;
/* 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 = vnt_get_duration_le(priv, tx_context->pkt_type,
need_ack);
buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack);
buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type,
need_ack);
buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type,
need_ack);
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);
tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
return le16_to_cpu(buf->duration_a);
}
static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context,
struct vnt_tx_datahead_a_fb *buf)
{
struct vnt_private *priv = tx_context->priv;
u16 rate = tx_context->tx_rate;
u8 pkt_type = tx_context->pkt_type;
u8 need_ack = tx_context->need_ack;
u32 frame_len = tx_context->frame_len;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a);
/* Get Duration and TimeStampOff */
buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack);
buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack);
buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack);
buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
return le16_to_cpu(buf->duration);
}
static u16 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;
u8 need_ack = tx_context->need_ack;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, frame_len, rate,
tx_context->pkt_type, &buf->ab);
/* Get Duration and TimeStampOff */
if (ieee80211_is_pspoll(hdr->frame_control)) {
__le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15));
buf->duration = dur;
} else {
buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type,
need_ack);
}
buf->time_stamp_off = vnt_time_stamp_off(priv, rate);
tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr);
return le16_to_cpu(buf->duration);
}
static int 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);
return 0;
}
static u16 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;
u16 current_rate = tx_context->tx_rate;
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_rtscts_duration_le(tx_context, RTSDUR_BB,
PK_TYPE_11B,
priv->top_cck_basic_rate);
buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
tx_context->pkt_type,
current_rate);
buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
tx_context->pkt_type,
current_rate);
vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
}
static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context,
struct vnt_rts_g_fb *buf)
{
struct vnt_private *priv = tx_context->priv;
u16 current_rate = tx_context->tx_rate;
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_rtscts_duration_le(tx_context, RTSDUR_BB,
PK_TYPE_11B,
priv->top_cck_basic_rate);
buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
tx_context->pkt_type,
current_rate);
buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA,
tx_context->pkt_type,
current_rate);
buf->rts_duration_ba_f0 =
vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0,
tx_context->pkt_type,
priv->tx_rate_fb0);
buf->rts_duration_aa_f0 =
vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
tx_context->pkt_type,
priv->tx_rate_fb0);
buf->rts_duration_ba_f1 =
vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1,
tx_context->pkt_type,
priv->tx_rate_fb1);
buf->rts_duration_aa_f1 =
vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
tx_context->pkt_type,
priv->tx_rate_fb1);
vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa);
return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
}
static u16 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 current_rate = tx_context->tx_rate;
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_rtscts_duration_le(tx_context, RTSDUR_AA,
tx_context->pkt_type,
current_rate);
vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
return vnt_rxtx_datahead_ab(tx_context, &buf->data_head);
}
static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context,
struct vnt_rts_a_fb *buf)
{
struct vnt_private *priv = tx_context->priv;
u16 current_rate = tx_context->tx_rate;
u16 rts_frame_len = 20;
vnt_get_phy_field(priv, rts_frame_len,
priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a);
buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA,
tx_context->pkt_type,
current_rate);
buf->rts_duration_f0 =
vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0,
tx_context->pkt_type,
priv->tx_rate_fb0);
buf->rts_duration_f1 =
vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1,
tx_context->pkt_type,
priv->tx_rate_fb1);
vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration);
return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head);
}
static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context,
union vnt_tx_data_head *head)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_cts_fb *buf = &head->cts_g_fb;
u32 cts_frame_len = 14;
u16 current_rate = tx_context->tx_rate;
/* Get SignalField,ServiceField,Length */
vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate,
PK_TYPE_11B, &buf->b);
buf->duration_ba =
vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA,
tx_context->pkt_type,
current_rate);
/* Get CTSDuration_ba_f0 */
buf->cts_duration_ba_f0 =
vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0,
tx_context->pkt_type,
priv->tx_rate_fb0);
/* Get CTSDuration_ba_f1 */
buf->cts_duration_ba_f1 =
vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1,
tx_context->pkt_type,
priv->tx_rate_fb1);
/* 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);
return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head);
}
static u16 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;
u16 current_rate = tx_context->tx_rate;
/* 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_rtscts_duration_le(tx_context, CTSDUR_BA,
tx_context->pkt_type,
current_rate);
/*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);
return vnt_rxtx_datahead_g(tx_context, &buf->data_head);
}
static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context,
union vnt_tx_head *tx_head, bool need_mic)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts;
union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head;
u32 frame_len = tx_context->frame_len;
u16 current_rate = tx_context->tx_rate;
u8 need_ack = tx_context->need_ack;
buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2,
tx_context->pkt_type, frame_len, current_rate);
buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1,
tx_context->pkt_type, frame_len, current_rate);
buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0,
tx_context->pkt_type, frame_len, current_rate);
buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
frame_len, current_rate,
need_ack);
buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len,
priv->top_cck_basic_rate, need_ack);
if (need_mic)
head = &tx_head->tx_rts.tx.mic.head;
if (tx_context->fb_option)
return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb);
return vnt_rxtx_rts_g_head(tx_context, &head->rts_g);
}
static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context,
union vnt_tx_head *tx_head, bool need_mic)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts;
union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head;
u32 frame_len = tx_context->frame_len;
u16 current_rate = tx_context->tx_rate;
u8 need_ack = tx_context->need_ack;
buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
frame_len, current_rate, need_ack);
buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B,
frame_len, priv->top_cck_basic_rate, need_ack);
buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3,
tx_context->pkt_type, frame_len, current_rate);
if (need_mic)
head = &tx_head->tx_cts.tx.mic.head;
/* Fill CTS */
if (tx_context->fb_option)
return vnt_fill_cts_fb_head(tx_context, head);
return vnt_fill_cts_head(tx_context, head);
}
static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context,
union vnt_tx_head *tx_head, bool need_rts, bool need_mic)
{
struct vnt_private *priv = tx_context->priv;
struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab;
union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head;
u32 frame_len = tx_context->frame_len;
u16 current_rate = tx_context->tx_rate;
u8 need_ack = tx_context->need_ack;
buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type,
frame_len, current_rate, need_ack);
if (need_mic)
head = &tx_head->tx_ab.tx.mic.head;
if (need_rts) {
if (tx_context->pkt_type == PK_TYPE_11B)
buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0,
tx_context->pkt_type, frame_len, current_rate);
else /* PK_TYPE_11A */
buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2,
tx_context->pkt_type, frame_len, current_rate);
if (tx_context->fb_option &&
tx_context->pkt_type == PK_TYPE_11A)
return vnt_rxtx_rts_a_fb_head(tx_context,
&head->rts_a_fb);
return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab);
}
if (tx_context->pkt_type == PK_TYPE_11A)
return vnt_rxtx_datahead_a_fb(tx_context,
&head->data_head_a_fb);
return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab);
}
static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context,
struct vnt_tx_buffer *tx_buffer,
struct vnt_mic_hdr **mic_hdr, u32 need_mic,
bool need_rts)
{
if (tx_context->pkt_type == PK_TYPE_11GB ||
tx_context->pkt_type == PK_TYPE_11GA) {
if (need_rts) {
if (need_mic)
*mic_hdr = &tx_buffer->
tx_head.tx_rts.tx.mic.hdr;
return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head,
need_mic);
}
if (need_mic)
*mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr;
return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic);
}
if (need_mic)
*mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr;
return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic);
}
static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context,
u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb,
u16 payload_len, struct vnt_mic_hdr *mic_hdr)
{
struct ieee80211_hdr *hdr = tx_context->hdr;
struct ieee80211_key_seq seq;
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(key_buffer, iv, 3);
memcpy(key_buffer + 3, tx_key->key, tx_key->keylen);
if (tx_key->keylen == WLAN_KEY_LEN_WEP40) {
memcpy(key_buffer + 8, iv, 3);
memcpy(key_buffer + 11,
tx_key->key, WLAN_KEY_LEN_WEP40);
}
break;
case WLAN_CIPHER_SUITE_TKIP:
ieee80211_get_tkip_p2k(tx_key, skb, key_buffer);
break;
case WLAN_CIPHER_SUITE_CCMP:
if (!mic_hdr)
return;
mic_hdr->id = 0x59;
mic_hdr->payload_len = cpu_to_be16(payload_len);
ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2);
ieee80211_get_key_tx_seq(tx_key, &seq);
memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN);
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(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP);
break;
default:
break;
}
}
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_key_conf *tx_key;
struct ieee80211_hdr *hdr;
struct vnt_mic_hdr *mic_hdr = NULL;
struct vnt_tx_buffer *tx_buffer;
struct vnt_tx_fifo_head *tx_buffer_head;
struct vnt_usb_send_context *tx_context;
unsigned long flags;
u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id;
u8 pkt_type, fb_option = AUTO_FB_NONE;
bool need_rts = false, is_pspoll = false;
bool need_mic = false;
hdr = (struct ieee80211_hdr *)(skb->data);
rate = ieee80211_get_tx_rate(priv->hw, info);
current_rate = rate->hw_value;
if (priv->current_rate != current_rate &&
!(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
priv->current_rate = current_rate;
vnt_schedule_command(priv, WLAN_CMD_SETPOWER);
}
if (current_rate > RATE_11M) {
if (info->band == IEEE80211_BAND_5GHZ) {
pkt_type = PK_TYPE_11A;
} else {
if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
pkt_type = PK_TYPE_11GB;
else
pkt_type = PK_TYPE_11GA;
}
} 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->skb = skb;
tx_context->pkt_type = pkt_type;
tx_context->need_ack = false;
tx_context->frame_len = skb->len + 4;
tx_context->tx_rate = current_rate;
spin_unlock_irqrestore(&priv->lock, flags);
tx_buffer = (struct vnt_tx_buffer *)tx_context->data;
tx_buffer_head = &tx_buffer->fifo_head;
tx_body_size = skb->len;
/*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);
tx_context->need_ack = true;
}
if (ieee80211_has_retry(hdr->frame_control))
tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY);
if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
priv->preamble_type = PREAMBLE_SHORT;
else
priv->preamble_type = PREAMBLE_LONG;
if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) {
need_rts = true;
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);
if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER)
is_pspoll = true;
tx_buffer_head->frag_ctl =
cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10);
if (info->control.hw_key) {
tx_key = info->control.hw_key;
switch (info->control.hw_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY);
break;
case WLAN_CIPHER_SUITE_TKIP:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP);
break;
case WLAN_CIPHER_SUITE_CCMP:
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES);
need_mic = true;
default:
break;
}
tx_context->frame_len += tx_key->icv_len;
}
tx_buffer_head->current_rate = cpu_to_le16(current_rate);
/* legacy rates TODO use ieee80211_tx_rate */
if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) {
if (priv->auto_fb_ctrl == AUTO_FB_0) {
tx_buffer_head->fifo_ctl |=
cpu_to_le16(FIFOCTL_AUTO_FB_0);
priv->tx_rate_fb0 =
vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M];
priv->tx_rate_fb1 =
vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M];
fb_option = AUTO_FB_0;
} else if (priv->auto_fb_ctrl == AUTO_FB_1) {
tx_buffer_head->fifo_ctl |=
cpu_to_le16(FIFOCTL_AUTO_FB_1);
priv->tx_rate_fb0 =
vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M];
priv->tx_rate_fb1 =
vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M];
fb_option = AUTO_FB_1;
}
}
tx_context->fb_option = fb_option;
duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr,
need_mic, need_rts);
tx_header_size = tx_context->tx_hdr_size;
if (!tx_header_size) {
tx_context->in_use = false;
return -ENOMEM;
}
tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG);
tx_bytes = tx_header_size + tx_body_size;
memcpy(tx_context->hdr, skb->data, tx_body_size);
hdr->duration_id = cpu_to_le16(duration_id);
if (info->control.hw_key) {
tx_key = info->control.hw_key;
if (tx_key->keylen > 0)
vnt_fill_txkey(tx_context, tx_buffer_head->tx_key,
tx_key, skb, tx_body_size, mic_hdr);
}
priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) &
IEEE80211_SCTL_SEQ) >> 4;
tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes);
tx_buffer->pkt_no = tx_context->pkt_no;
tx_buffer->type = 0x00;
tx_bytes += 4;
tx_context->type = CONTEXT_DATA_PACKET;
tx_context->buf_len = tx_bytes;
spin_lock_irqsave(&priv->lock, flags);
if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) {
spin_unlock_irqrestore(&priv->lock, flags);
return -EIO;
}
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int vnt_beacon_xmit(struct vnt_private *priv,
struct sk_buff *skb)
{
struct vnt_beacon_buffer *beacon_buffer;
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, count;
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);
beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0];
short_head = &beacon_buffer->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 Duration and TimeStampOff */
short_head->duration = vnt_get_duration_le(priv,
PK_TYPE_11A, false);
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 Duration and TimeStampOff */
short_head->duration = vnt_get_duration_le(priv,
PK_TYPE_11B, false);
short_head->time_stamp_off =
vnt_time_stamp_off(priv, current_rate);
}
/* Generate Beacon Header */
mgmt_hdr = &beacon_buffer->mgmt_hdr;
memcpy(mgmt_hdr, skb->data, skb->len);
/* 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;
count = sizeof(struct vnt_tx_short_buf_head) + skb->len;
beacon_buffer->tx_byte_count = cpu_to_le16(count);
beacon_buffer->pkt_no = context->pkt_no;
beacon_buffer->type = 0x01;
context->type = CONTEXT_BEACON_PACKET;
context->buf_len = count + 4; /* USB header */
spin_lock_irqsave(&priv->lock, flags);
if (vnt_tx_context(priv, context) != STATUS_PENDING)
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);
}