![Johannes Berg](/assets/img/avatar_default.png)
This patch fixes mac80211 to not use the skb->cb over the queue step from virtual interfaces to the master. The patch also, for now, disables aggregation because that would still require requeuing, will fix that in a separate patch. There are two other places (software requeue and powersaving stations) where requeue can happen, but that is not currently used by any drivers/not possible to use respectively. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
728 lines
19 KiB
C
728 lines
19 KiB
C
/*
|
|
|
|
Broadcom B43 wireless driver
|
|
|
|
Transmission (TX/RX) related functions.
|
|
|
|
Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
|
|
Copyright (C) 2005 Stefano Brivio <stefano.brivio@polimi.it>
|
|
Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de>
|
|
Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
|
|
Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
|
|
|
|
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; see the file COPYING. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
|
|
Boston, MA 02110-1301, USA.
|
|
|
|
*/
|
|
|
|
#include "xmit.h"
|
|
#include "phy.h"
|
|
#include "dma.h"
|
|
#include "pio.h"
|
|
|
|
|
|
/* Extract the bitrate index out of a CCK PLCP header. */
|
|
static int b43_plcp_get_bitrate_idx_cck(struct b43_plcp_hdr6 *plcp)
|
|
{
|
|
switch (plcp->raw[0]) {
|
|
case 0x0A:
|
|
return 0;
|
|
case 0x14:
|
|
return 1;
|
|
case 0x37:
|
|
return 2;
|
|
case 0x6E:
|
|
return 3;
|
|
}
|
|
B43_WARN_ON(1);
|
|
return -1;
|
|
}
|
|
|
|
/* Extract the bitrate index out of an OFDM PLCP header. */
|
|
static u8 b43_plcp_get_bitrate_idx_ofdm(struct b43_plcp_hdr6 *plcp, bool aphy)
|
|
{
|
|
int base = aphy ? 0 : 4;
|
|
|
|
switch (plcp->raw[0] & 0xF) {
|
|
case 0xB:
|
|
return base + 0;
|
|
case 0xF:
|
|
return base + 1;
|
|
case 0xA:
|
|
return base + 2;
|
|
case 0xE:
|
|
return base + 3;
|
|
case 0x9:
|
|
return base + 4;
|
|
case 0xD:
|
|
return base + 5;
|
|
case 0x8:
|
|
return base + 6;
|
|
case 0xC:
|
|
return base + 7;
|
|
}
|
|
B43_WARN_ON(1);
|
|
return -1;
|
|
}
|
|
|
|
u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
|
|
{
|
|
switch (bitrate) {
|
|
case B43_CCK_RATE_1MB:
|
|
return 0x0A;
|
|
case B43_CCK_RATE_2MB:
|
|
return 0x14;
|
|
case B43_CCK_RATE_5MB:
|
|
return 0x37;
|
|
case B43_CCK_RATE_11MB:
|
|
return 0x6E;
|
|
}
|
|
B43_WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
|
|
{
|
|
switch (bitrate) {
|
|
case B43_OFDM_RATE_6MB:
|
|
return 0xB;
|
|
case B43_OFDM_RATE_9MB:
|
|
return 0xF;
|
|
case B43_OFDM_RATE_12MB:
|
|
return 0xA;
|
|
case B43_OFDM_RATE_18MB:
|
|
return 0xE;
|
|
case B43_OFDM_RATE_24MB:
|
|
return 0x9;
|
|
case B43_OFDM_RATE_36MB:
|
|
return 0xD;
|
|
case B43_OFDM_RATE_48MB:
|
|
return 0x8;
|
|
case B43_OFDM_RATE_54MB:
|
|
return 0xC;
|
|
}
|
|
B43_WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
|
|
const u16 octets, const u8 bitrate)
|
|
{
|
|
__le32 *data = &(plcp->data);
|
|
__u8 *raw = plcp->raw;
|
|
|
|
if (b43_is_ofdm_rate(bitrate)) {
|
|
u32 d;
|
|
|
|
d = b43_plcp_get_ratecode_ofdm(bitrate);
|
|
B43_WARN_ON(octets & 0xF000);
|
|
d |= (octets << 5);
|
|
*data = cpu_to_le32(d);
|
|
} else {
|
|
u32 plen;
|
|
|
|
plen = octets * 16 / bitrate;
|
|
if ((octets * 16 % bitrate) > 0) {
|
|
plen++;
|
|
if ((bitrate == B43_CCK_RATE_11MB)
|
|
&& ((octets * 8 % 11) < 4)) {
|
|
raw[1] = 0x84;
|
|
} else
|
|
raw[1] = 0x04;
|
|
} else
|
|
raw[1] = 0x04;
|
|
*data |= cpu_to_le32(plen << 16);
|
|
raw[0] = b43_plcp_get_ratecode_cck(bitrate);
|
|
}
|
|
}
|
|
|
|
static u8 b43_calc_fallback_rate(u8 bitrate)
|
|
{
|
|
switch (bitrate) {
|
|
case B43_CCK_RATE_1MB:
|
|
return B43_CCK_RATE_1MB;
|
|
case B43_CCK_RATE_2MB:
|
|
return B43_CCK_RATE_1MB;
|
|
case B43_CCK_RATE_5MB:
|
|
return B43_CCK_RATE_2MB;
|
|
case B43_CCK_RATE_11MB:
|
|
return B43_CCK_RATE_5MB;
|
|
case B43_OFDM_RATE_6MB:
|
|
return B43_CCK_RATE_5MB;
|
|
case B43_OFDM_RATE_9MB:
|
|
return B43_OFDM_RATE_6MB;
|
|
case B43_OFDM_RATE_12MB:
|
|
return B43_OFDM_RATE_9MB;
|
|
case B43_OFDM_RATE_18MB:
|
|
return B43_OFDM_RATE_12MB;
|
|
case B43_OFDM_RATE_24MB:
|
|
return B43_OFDM_RATE_18MB;
|
|
case B43_OFDM_RATE_36MB:
|
|
return B43_OFDM_RATE_24MB;
|
|
case B43_OFDM_RATE_48MB:
|
|
return B43_OFDM_RATE_36MB;
|
|
case B43_OFDM_RATE_54MB:
|
|
return B43_OFDM_RATE_48MB;
|
|
}
|
|
B43_WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
/* Generate a TX data header. */
|
|
int b43_generate_txhdr(struct b43_wldev *dev,
|
|
u8 *_txhdr,
|
|
const unsigned char *fragment_data,
|
|
unsigned int fragment_len,
|
|
const struct ieee80211_tx_info *info,
|
|
u16 cookie)
|
|
{
|
|
struct b43_txhdr *txhdr = (struct b43_txhdr *)_txhdr;
|
|
const struct b43_phy *phy = &dev->phy;
|
|
const struct ieee80211_hdr *wlhdr =
|
|
(const struct ieee80211_hdr *)fragment_data;
|
|
int use_encryption = !!info->control.hw_key;
|
|
__le16 fctl = wlhdr->frame_control;
|
|
struct ieee80211_rate *fbrate;
|
|
u8 rate, rate_fb;
|
|
int rate_ofdm, rate_fb_ofdm;
|
|
unsigned int plcp_fragment_len;
|
|
u32 mac_ctl = 0;
|
|
u16 phy_ctl = 0;
|
|
u8 extra_ft = 0;
|
|
struct ieee80211_rate *txrate;
|
|
|
|
memset(txhdr, 0, sizeof(*txhdr));
|
|
|
|
txrate = ieee80211_get_tx_rate(dev->wl->hw, info);
|
|
rate = txrate ? txrate->hw_value : B43_CCK_RATE_1MB;
|
|
rate_ofdm = b43_is_ofdm_rate(rate);
|
|
fbrate = ieee80211_get_alt_retry_rate(dev->wl->hw, info) ? : txrate;
|
|
rate_fb = fbrate->hw_value;
|
|
rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
|
|
|
|
if (rate_ofdm)
|
|
txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
|
|
else
|
|
txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
|
|
txhdr->mac_frame_ctl = wlhdr->frame_control;
|
|
memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
|
|
|
|
/* Calculate duration for fallback rate */
|
|
if ((rate_fb == rate) ||
|
|
(wlhdr->duration_id & cpu_to_le16(0x8000)) ||
|
|
(wlhdr->duration_id == cpu_to_le16(0))) {
|
|
/* If the fallback rate equals the normal rate or the
|
|
* dur_id field contains an AID, CFP magic or 0,
|
|
* use the original dur_id field. */
|
|
txhdr->dur_fb = wlhdr->duration_id;
|
|
} else {
|
|
txhdr->dur_fb = ieee80211_generic_frame_duration(
|
|
dev->wl->hw, info->control.vif, fragment_len, fbrate);
|
|
}
|
|
|
|
plcp_fragment_len = fragment_len + FCS_LEN;
|
|
if (use_encryption) {
|
|
u8 key_idx = info->control.hw_key->hw_key_idx;
|
|
struct b43_key *key;
|
|
int wlhdr_len;
|
|
size_t iv_len;
|
|
|
|
B43_WARN_ON(key_idx >= dev->max_nr_keys);
|
|
key = &(dev->key[key_idx]);
|
|
|
|
if (unlikely(!key->keyconf)) {
|
|
/* This key is invalid. This might only happen
|
|
* in a short timeframe after machine resume before
|
|
* we were able to reconfigure keys.
|
|
* Drop this packet completely. Do not transmit it
|
|
* unencrypted to avoid leaking information. */
|
|
return -ENOKEY;
|
|
}
|
|
|
|
/* Hardware appends ICV. */
|
|
plcp_fragment_len += info->control.icv_len;
|
|
|
|
key_idx = b43_kidx_to_fw(dev, key_idx);
|
|
mac_ctl |= (key_idx << B43_TXH_MAC_KEYIDX_SHIFT) &
|
|
B43_TXH_MAC_KEYIDX;
|
|
mac_ctl |= (key->algorithm << B43_TXH_MAC_KEYALG_SHIFT) &
|
|
B43_TXH_MAC_KEYALG;
|
|
wlhdr_len = ieee80211_hdrlen(fctl);
|
|
iv_len = min((size_t) info->control.iv_len,
|
|
ARRAY_SIZE(txhdr->iv));
|
|
memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
|
|
}
|
|
if (b43_is_old_txhdr_format(dev)) {
|
|
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->old_format.plcp),
|
|
plcp_fragment_len, rate);
|
|
} else {
|
|
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->new_format.plcp),
|
|
plcp_fragment_len, rate);
|
|
}
|
|
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
|
|
plcp_fragment_len, rate_fb);
|
|
|
|
/* Extra Frame Types */
|
|
if (rate_fb_ofdm)
|
|
extra_ft |= B43_TXH_EFT_FB_OFDM;
|
|
else
|
|
extra_ft |= B43_TXH_EFT_FB_CCK;
|
|
|
|
/* Set channel radio code. Note that the micrcode ORs 0x100 to
|
|
* this value before comparing it to the value in SHM, if this
|
|
* is a 5Ghz packet.
|
|
*/
|
|
txhdr->chan_radio_code = phy->channel;
|
|
|
|
/* PHY TX Control word */
|
|
if (rate_ofdm)
|
|
phy_ctl |= B43_TXH_PHY_ENC_OFDM;
|
|
else
|
|
phy_ctl |= B43_TXH_PHY_ENC_CCK;
|
|
if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE)
|
|
phy_ctl |= B43_TXH_PHY_SHORTPRMBL;
|
|
|
|
switch (b43_ieee80211_antenna_sanitize(dev, info->antenna_sel_tx)) {
|
|
case 0: /* Default */
|
|
phy_ctl |= B43_TXH_PHY_ANT01AUTO;
|
|
break;
|
|
case 1: /* Antenna 0 */
|
|
phy_ctl |= B43_TXH_PHY_ANT0;
|
|
break;
|
|
case 2: /* Antenna 1 */
|
|
phy_ctl |= B43_TXH_PHY_ANT1;
|
|
break;
|
|
case 3: /* Antenna 2 */
|
|
phy_ctl |= B43_TXH_PHY_ANT2;
|
|
break;
|
|
case 4: /* Antenna 3 */
|
|
phy_ctl |= B43_TXH_PHY_ANT3;
|
|
break;
|
|
default:
|
|
B43_WARN_ON(1);
|
|
}
|
|
|
|
/* MAC control */
|
|
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
|
|
mac_ctl |= B43_TXH_MAC_ACK;
|
|
/* use hardware sequence counter as the non-TID counter */
|
|
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
|
|
mac_ctl |= B43_TXH_MAC_HWSEQ;
|
|
if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
|
|
mac_ctl |= B43_TXH_MAC_STMSDU;
|
|
if (phy->type == B43_PHYTYPE_A)
|
|
mac_ctl |= B43_TXH_MAC_5GHZ;
|
|
if (info->flags & IEEE80211_TX_CTL_LONG_RETRY_LIMIT)
|
|
mac_ctl |= B43_TXH_MAC_LONGFRAME;
|
|
|
|
/* Generate the RTS or CTS-to-self frame */
|
|
if ((info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) ||
|
|
(info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT)) {
|
|
unsigned int len;
|
|
struct ieee80211_hdr *hdr;
|
|
int rts_rate, rts_rate_fb;
|
|
int rts_rate_ofdm, rts_rate_fb_ofdm;
|
|
struct b43_plcp_hdr6 *plcp;
|
|
struct ieee80211_rate *rts_cts_rate;
|
|
|
|
rts_cts_rate = ieee80211_get_rts_cts_rate(dev->wl->hw, info);
|
|
|
|
rts_rate = rts_cts_rate ? rts_cts_rate->hw_value : B43_CCK_RATE_1MB;
|
|
rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
|
|
rts_rate_fb = b43_calc_fallback_rate(rts_rate);
|
|
rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
|
|
|
|
if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
|
|
struct ieee80211_cts *cts;
|
|
|
|
if (b43_is_old_txhdr_format(dev)) {
|
|
cts = (struct ieee80211_cts *)
|
|
(txhdr->old_format.rts_frame);
|
|
} else {
|
|
cts = (struct ieee80211_cts *)
|
|
(txhdr->new_format.rts_frame);
|
|
}
|
|
ieee80211_ctstoself_get(dev->wl->hw, info->control.vif,
|
|
fragment_data, fragment_len,
|
|
info, cts);
|
|
mac_ctl |= B43_TXH_MAC_SENDCTS;
|
|
len = sizeof(struct ieee80211_cts);
|
|
} else {
|
|
struct ieee80211_rts *rts;
|
|
|
|
if (b43_is_old_txhdr_format(dev)) {
|
|
rts = (struct ieee80211_rts *)
|
|
(txhdr->old_format.rts_frame);
|
|
} else {
|
|
rts = (struct ieee80211_rts *)
|
|
(txhdr->new_format.rts_frame);
|
|
}
|
|
ieee80211_rts_get(dev->wl->hw, info->control.vif,
|
|
fragment_data, fragment_len,
|
|
info, rts);
|
|
mac_ctl |= B43_TXH_MAC_SENDRTS;
|
|
len = sizeof(struct ieee80211_rts);
|
|
}
|
|
len += FCS_LEN;
|
|
|
|
/* Generate the PLCP headers for the RTS/CTS frame */
|
|
if (b43_is_old_txhdr_format(dev))
|
|
plcp = &txhdr->old_format.rts_plcp;
|
|
else
|
|
plcp = &txhdr->new_format.rts_plcp;
|
|
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
|
|
len, rts_rate);
|
|
plcp = &txhdr->rts_plcp_fb;
|
|
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)plcp,
|
|
len, rts_rate_fb);
|
|
|
|
if (b43_is_old_txhdr_format(dev)) {
|
|
hdr = (struct ieee80211_hdr *)
|
|
(&txhdr->old_format.rts_frame);
|
|
} else {
|
|
hdr = (struct ieee80211_hdr *)
|
|
(&txhdr->new_format.rts_frame);
|
|
}
|
|
txhdr->rts_dur_fb = hdr->duration_id;
|
|
|
|
if (rts_rate_ofdm) {
|
|
extra_ft |= B43_TXH_EFT_RTS_OFDM;
|
|
txhdr->phy_rate_rts =
|
|
b43_plcp_get_ratecode_ofdm(rts_rate);
|
|
} else {
|
|
extra_ft |= B43_TXH_EFT_RTS_CCK;
|
|
txhdr->phy_rate_rts =
|
|
b43_plcp_get_ratecode_cck(rts_rate);
|
|
}
|
|
if (rts_rate_fb_ofdm)
|
|
extra_ft |= B43_TXH_EFT_RTSFB_OFDM;
|
|
else
|
|
extra_ft |= B43_TXH_EFT_RTSFB_CCK;
|
|
}
|
|
|
|
/* Magic cookie */
|
|
if (b43_is_old_txhdr_format(dev))
|
|
txhdr->old_format.cookie = cpu_to_le16(cookie);
|
|
else
|
|
txhdr->new_format.cookie = cpu_to_le16(cookie);
|
|
|
|
/* Apply the bitfields */
|
|
txhdr->mac_ctl = cpu_to_le32(mac_ctl);
|
|
txhdr->phy_ctl = cpu_to_le16(phy_ctl);
|
|
txhdr->extra_ft = extra_ft;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static s8 b43_rssi_postprocess(struct b43_wldev *dev,
|
|
u8 in_rssi, int ofdm,
|
|
int adjust_2053, int adjust_2050)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
s32 tmp;
|
|
|
|
switch (phy->radio_ver) {
|
|
case 0x2050:
|
|
if (ofdm) {
|
|
tmp = in_rssi;
|
|
if (tmp > 127)
|
|
tmp -= 256;
|
|
tmp *= 73;
|
|
tmp /= 64;
|
|
if (adjust_2050)
|
|
tmp += 25;
|
|
else
|
|
tmp -= 3;
|
|
} else {
|
|
if (dev->dev->bus->sprom.
|
|
boardflags_lo & B43_BFL_RSSI) {
|
|
if (in_rssi > 63)
|
|
in_rssi = 63;
|
|
tmp = phy->nrssi_lt[in_rssi];
|
|
tmp = 31 - tmp;
|
|
tmp *= -131;
|
|
tmp /= 128;
|
|
tmp -= 57;
|
|
} else {
|
|
tmp = in_rssi;
|
|
tmp = 31 - tmp;
|
|
tmp *= -149;
|
|
tmp /= 128;
|
|
tmp -= 68;
|
|
}
|
|
if (phy->type == B43_PHYTYPE_G && adjust_2050)
|
|
tmp += 25;
|
|
}
|
|
break;
|
|
case 0x2060:
|
|
if (in_rssi > 127)
|
|
tmp = in_rssi - 256;
|
|
else
|
|
tmp = in_rssi;
|
|
break;
|
|
default:
|
|
tmp = in_rssi;
|
|
tmp -= 11;
|
|
tmp *= 103;
|
|
tmp /= 64;
|
|
if (adjust_2053)
|
|
tmp -= 109;
|
|
else
|
|
tmp -= 83;
|
|
}
|
|
|
|
return (s8) tmp;
|
|
}
|
|
|
|
//TODO
|
|
#if 0
|
|
static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
|
|
{
|
|
struct b43_phy *phy = &dev->phy;
|
|
s8 ret;
|
|
|
|
if (phy->type == B43_PHYTYPE_A) {
|
|
//TODO: Incomplete specs.
|
|
ret = 0;
|
|
} else
|
|
ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
|
|
{
|
|
struct ieee80211_rx_status status;
|
|
struct b43_plcp_hdr6 *plcp;
|
|
struct ieee80211_hdr *wlhdr;
|
|
const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
|
|
__le16 fctl;
|
|
u16 phystat0, phystat3, chanstat, mactime;
|
|
u32 macstat;
|
|
u16 chanid;
|
|
u16 phytype;
|
|
int padding;
|
|
|
|
memset(&status, 0, sizeof(status));
|
|
|
|
/* Get metadata about the frame from the header. */
|
|
phystat0 = le16_to_cpu(rxhdr->phy_status0);
|
|
phystat3 = le16_to_cpu(rxhdr->phy_status3);
|
|
macstat = le32_to_cpu(rxhdr->mac_status);
|
|
mactime = le16_to_cpu(rxhdr->mac_time);
|
|
chanstat = le16_to_cpu(rxhdr->channel);
|
|
phytype = chanstat & B43_RX_CHAN_PHYTYPE;
|
|
|
|
if (macstat & B43_RX_MAC_FCSERR)
|
|
dev->wl->ieee_stats.dot11FCSErrorCount++;
|
|
if (macstat & B43_RX_MAC_DECERR) {
|
|
/* Decryption with the given key failed.
|
|
* Drop the packet. We also won't be able to decrypt it with
|
|
* the key in software. */
|
|
goto drop;
|
|
}
|
|
|
|
/* Skip PLCP and padding */
|
|
padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
|
|
if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
|
|
b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
|
|
goto drop;
|
|
}
|
|
plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
|
|
skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
|
|
/* The skb contains the Wireless Header + payload data now */
|
|
if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) {
|
|
b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
|
|
goto drop;
|
|
}
|
|
wlhdr = (struct ieee80211_hdr *)(skb->data);
|
|
fctl = wlhdr->frame_control;
|
|
|
|
if (macstat & B43_RX_MAC_DEC) {
|
|
unsigned int keyidx;
|
|
int wlhdr_len;
|
|
|
|
keyidx = ((macstat & B43_RX_MAC_KEYIDX)
|
|
>> B43_RX_MAC_KEYIDX_SHIFT);
|
|
/* We must adjust the key index here. We want the "physical"
|
|
* key index, but the ucode passed it slightly different.
|
|
*/
|
|
keyidx = b43_kidx_to_raw(dev, keyidx);
|
|
B43_WARN_ON(keyidx >= dev->max_nr_keys);
|
|
|
|
if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
|
|
wlhdr_len = ieee80211_hdrlen(fctl);
|
|
if (unlikely(skb->len < (wlhdr_len + 3))) {
|
|
b43dbg(dev->wl,
|
|
"RX: Packet size underrun (3)\n");
|
|
goto drop;
|
|
}
|
|
status.flag |= RX_FLAG_DECRYPTED;
|
|
}
|
|
}
|
|
|
|
/* Link quality statistics */
|
|
status.noise = dev->stats.link_noise;
|
|
if ((chanstat & B43_RX_CHAN_PHYTYPE) == B43_PHYTYPE_N) {
|
|
// s8 rssi = max(rxhdr->power0, rxhdr->power1);
|
|
//TODO: Find out what the rssi value is (dBm or percentage?)
|
|
// and also find out what the maximum possible value is.
|
|
// Fill status.ssi and status.signal fields.
|
|
} else {
|
|
status.signal = b43_rssi_postprocess(dev, rxhdr->jssi,
|
|
(phystat0 & B43_RX_PHYST0_OFDM),
|
|
(phystat0 & B43_RX_PHYST0_GAINCTL),
|
|
(phystat3 & B43_RX_PHYST3_TRSTATE));
|
|
status.qual = (rxhdr->jssi * 100) / B43_RX_MAX_SSI;
|
|
}
|
|
|
|
if (phystat0 & B43_RX_PHYST0_OFDM)
|
|
status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
|
|
phytype == B43_PHYTYPE_A);
|
|
else
|
|
status.rate_idx = b43_plcp_get_bitrate_idx_cck(plcp);
|
|
status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
|
|
|
|
/*
|
|
* All frames on monitor interfaces and beacons always need a full
|
|
* 64-bit timestamp. Monitor interfaces need it for diagnostic
|
|
* purposes and beacons for IBSS merging.
|
|
* This code assumes we get to process the packet within 16 bits
|
|
* of timestamp, i.e. about 65 milliseconds after the PHY received
|
|
* the first symbol.
|
|
*/
|
|
if (ieee80211_is_beacon(fctl) || dev->wl->radiotap_enabled) {
|
|
u16 low_mactime_now;
|
|
|
|
b43_tsf_read(dev, &status.mactime);
|
|
low_mactime_now = status.mactime;
|
|
status.mactime = status.mactime & ~0xFFFFULL;
|
|
status.mactime += mactime;
|
|
if (low_mactime_now <= mactime)
|
|
status.mactime -= 0x10000;
|
|
status.flag |= RX_FLAG_TSFT;
|
|
}
|
|
|
|
chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
|
|
switch (chanstat & B43_RX_CHAN_PHYTYPE) {
|
|
case B43_PHYTYPE_A:
|
|
status.band = IEEE80211_BAND_5GHZ;
|
|
B43_WARN_ON(1);
|
|
/* FIXME: We don't really know which value the "chanid" contains.
|
|
* So the following assignment might be wrong. */
|
|
status.freq = b43_channel_to_freq_5ghz(chanid);
|
|
break;
|
|
case B43_PHYTYPE_G:
|
|
status.band = IEEE80211_BAND_2GHZ;
|
|
/* chanid is the radio channel cookie value as used
|
|
* to tune the radio. */
|
|
status.freq = chanid + 2400;
|
|
break;
|
|
case B43_PHYTYPE_N:
|
|
/* chanid is the SHM channel cookie. Which is the plain
|
|
* channel number in b43. */
|
|
if (chanstat & B43_RX_CHAN_5GHZ) {
|
|
status.band = IEEE80211_BAND_5GHZ;
|
|
status.freq = b43_freq_to_channel_5ghz(chanid);
|
|
} else {
|
|
status.band = IEEE80211_BAND_2GHZ;
|
|
status.freq = b43_freq_to_channel_2ghz(chanid);
|
|
}
|
|
break;
|
|
default:
|
|
B43_WARN_ON(1);
|
|
goto drop;
|
|
}
|
|
|
|
dev->stats.last_rx = jiffies;
|
|
ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
|
|
|
|
return;
|
|
drop:
|
|
b43dbg(dev->wl, "RX: Packet dropped\n");
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
void b43_handle_txstatus(struct b43_wldev *dev,
|
|
const struct b43_txstatus *status)
|
|
{
|
|
b43_debugfs_log_txstat(dev, status);
|
|
|
|
if (status->intermediate)
|
|
return;
|
|
if (status->for_ampdu)
|
|
return;
|
|
if (!status->acked)
|
|
dev->wl->ieee_stats.dot11ACKFailureCount++;
|
|
if (status->rts_count) {
|
|
if (status->rts_count == 0xF) //FIXME
|
|
dev->wl->ieee_stats.dot11RTSFailureCount++;
|
|
else
|
|
dev->wl->ieee_stats.dot11RTSSuccessCount++;
|
|
}
|
|
|
|
if (b43_using_pio_transfers(dev))
|
|
b43_pio_handle_txstatus(dev, status);
|
|
else
|
|
b43_dma_handle_txstatus(dev, status);
|
|
}
|
|
|
|
/* Fill out the mac80211 TXstatus report based on the b43-specific
|
|
* txstatus report data. This returns a boolean whether the frame was
|
|
* successfully transmitted. */
|
|
bool b43_fill_txstatus_report(struct ieee80211_tx_info *report,
|
|
const struct b43_txstatus *status)
|
|
{
|
|
bool frame_success = 1;
|
|
|
|
if (status->acked) {
|
|
/* The frame was ACKed. */
|
|
report->flags |= IEEE80211_TX_STAT_ACK;
|
|
} else {
|
|
/* The frame was not ACKed... */
|
|
if (!(report->flags & IEEE80211_TX_CTL_NO_ACK)) {
|
|
/* ...but we expected an ACK. */
|
|
frame_success = 0;
|
|
report->status.excessive_retries = 1;
|
|
}
|
|
}
|
|
if (status->frame_count == 0) {
|
|
/* The frame was not transmitted at all. */
|
|
report->status.retry_count = 0;
|
|
} else
|
|
report->status.retry_count = status->frame_count - 1;
|
|
|
|
return frame_success;
|
|
}
|
|
|
|
/* Stop any TX operation on the device (suspend the hardware queues) */
|
|
void b43_tx_suspend(struct b43_wldev *dev)
|
|
{
|
|
if (b43_using_pio_transfers(dev))
|
|
b43_pio_tx_suspend(dev);
|
|
else
|
|
b43_dma_tx_suspend(dev);
|
|
}
|
|
|
|
/* Resume any TX operation on the device (resume the hardware queues) */
|
|
void b43_tx_resume(struct b43_wldev *dev)
|
|
{
|
|
if (b43_using_pio_transfers(dev))
|
|
b43_pio_tx_resume(dev);
|
|
else
|
|
b43_dma_tx_resume(dev);
|
|
}
|