android_kernel_motorola_sm6225/drivers/net/wireless/b43/xmit.c
Michael Buesch 03b29773b6 b43: Remove PIO support
Remove b43 PIO support.
DMA works well on all supported devices. There's no reason to use PIO.
Additionally, new devices don't support PIO in hardware anymore.
b43 PIO support is dead and unused code.

After applying this patch please do
git rm drivers/net/wireless/b43/pio.h
git rm drivers/net/wireless/b43/pio.c
to remove the main PIO support code.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-01-28 15:09:17 -08:00

670 lines
17 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"
/* Extract the bitrate out of a CCK PLCP header. */
static u8 b43_plcp_get_bitrate_cck(struct b43_plcp_hdr6 *plcp)
{
switch (plcp->raw[0]) {
case 0x0A:
return B43_CCK_RATE_1MB;
case 0x14:
return B43_CCK_RATE_2MB;
case 0x37:
return B43_CCK_RATE_5MB;
case 0x6E:
return B43_CCK_RATE_11MB;
}
B43_WARN_ON(1);
return 0;
}
/* Extract the bitrate out of an OFDM PLCP header. */
static u8 b43_plcp_get_bitrate_ofdm(struct b43_plcp_hdr6 *plcp)
{
switch (plcp->raw[0] & 0xF) {
case 0xB:
return B43_OFDM_RATE_6MB;
case 0xF:
return B43_OFDM_RATE_9MB;
case 0xA:
return B43_OFDM_RATE_12MB;
case 0xE:
return B43_OFDM_RATE_18MB;
case 0x9:
return B43_OFDM_RATE_24MB;
case 0xD:
return B43_OFDM_RATE_36MB;
case 0x8:
return B43_OFDM_RATE_48MB;
case 0xC:
return B43_OFDM_RATE_54MB;
}
B43_WARN_ON(1);
return 0;
}
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;
}
static void generate_txhdr_fw4(struct b43_wldev *dev,
struct b43_txhdr_fw4 *txhdr,
const unsigned char *fragment_data,
unsigned int fragment_len,
const struct ieee80211_tx_control *txctl,
u16 cookie)
{
const struct b43_phy *phy = &dev->phy;
const struct ieee80211_hdr *wlhdr =
(const struct ieee80211_hdr *)fragment_data;
int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
u16 fctl = le16_to_cpu(wlhdr->frame_control);
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;
memset(txhdr, 0, sizeof(*txhdr));
rate = txctl->tx_rate;
rate_ofdm = b43_is_ofdm_rate(rate);
rate_fb = (txctl->alt_retry_rate == -1) ? rate : txctl->alt_retry_rate;
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 {
int fbrate_base100kbps = B43_RATE_TO_BASE100KBPS(rate_fb);
txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
dev->wl->if_id,
fragment_len,
fbrate_base100kbps);
}
plcp_fragment_len = fragment_len + FCS_LEN;
if (use_encryption) {
u8 key_idx = (u16) (txctl->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]);
B43_WARN_ON(!key->keyconf);
/* Hardware appends ICV. */
plcp_fragment_len += txctl->icv_len;
key_idx = b43_kidx_to_fw(dev, key_idx);
mac_ctl |= (key_idx << B43_TX4_MAC_KEYIDX_SHIFT) &
B43_TX4_MAC_KEYIDX;
mac_ctl |= (key->algorithm << B43_TX4_MAC_KEYALG_SHIFT) &
B43_TX4_MAC_KEYALG;
wlhdr_len = ieee80211_get_hdrlen(fctl);
iv_len = min((size_t) txctl->iv_len,
ARRAY_SIZE(txhdr->iv));
memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
}
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->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_TX4_EFT_FBOFDM;
/* 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_TX4_PHY_OFDM;
if (dev->short_preamble)
phy_ctl |= B43_TX4_PHY_SHORTPRMBL;
switch (b43_ieee80211_antenna_sanitize(dev, txctl->antenna_sel_tx)) {
case 0: /* Default */
phy_ctl |= B43_TX4_PHY_ANTLAST;
break;
case 1: /* Antenna 0 */
phy_ctl |= B43_TX4_PHY_ANT0;
break;
case 2: /* Antenna 1 */
phy_ctl |= B43_TX4_PHY_ANT1;
break;
default:
B43_WARN_ON(1);
}
/* MAC control */
if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
mac_ctl |= B43_TX4_MAC_ACK;
if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
mac_ctl |= B43_TX4_MAC_HWSEQ;
if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
mac_ctl |= B43_TX4_MAC_STMSDU;
if (phy->type == B43_PHYTYPE_A)
mac_ctl |= B43_TX4_MAC_5GHZ;
if (txctl->flags & IEEE80211_TXCTL_LONG_RETRY_LIMIT)
mac_ctl |= B43_TX4_MAC_LONGFRAME;
/* Generate the RTS or CTS-to-self frame */
if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
(txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
unsigned int len;
struct ieee80211_hdr *hdr;
int rts_rate, rts_rate_fb;
int rts_rate_ofdm, rts_rate_fb_ofdm;
rts_rate = txctl->rts_cts_rate;
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 (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
ieee80211_ctstoself_get(dev->wl->hw, dev->wl->if_id,
fragment_data, fragment_len,
txctl,
(struct ieee80211_cts *)(txhdr->
rts_frame));
mac_ctl |= B43_TX4_MAC_SENDCTS;
len = sizeof(struct ieee80211_cts);
} else {
ieee80211_rts_get(dev->wl->hw, dev->wl->if_id,
fragment_data, fragment_len, txctl,
(struct ieee80211_rts *)(txhdr->
rts_frame));
mac_ctl |= B43_TX4_MAC_SENDRTS;
len = sizeof(struct ieee80211_rts);
}
len += FCS_LEN;
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
rts_plcp), len,
rts_rate);
b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
rts_plcp_fb),
len, rts_rate_fb);
hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
txhdr->rts_dur_fb = hdr->duration_id;
if (rts_rate_ofdm) {
extra_ft |= B43_TX4_EFT_RTSOFDM;
txhdr->phy_rate_rts =
b43_plcp_get_ratecode_ofdm(rts_rate);
} else
txhdr->phy_rate_rts =
b43_plcp_get_ratecode_cck(rts_rate);
if (rts_rate_fb_ofdm)
extra_ft |= B43_TX4_EFT_RTSFBOFDM;
}
/* Magic cookie */
txhdr->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;
}
void b43_generate_txhdr(struct b43_wldev *dev,
u8 * txhdr,
const unsigned char *fragment_data,
unsigned int fragment_len,
const struct ieee80211_tx_control *txctl, u16 cookie)
{
generate_txhdr_fw4(dev, (struct b43_txhdr_fw4 *)txhdr,
fragment_data, fragment_len, txctl, cookie);
}
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;
u16 fctl;
u16 phystat0, phystat3, chanstat, mactime;
u32 macstat;
u16 chanid;
u8 jssi;
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);
jssi = rxhdr->jssi;
macstat = le32_to_cpu(rxhdr->mac_status);
mactime = le16_to_cpu(rxhdr->mac_time);
chanstat = le16_to_cpu(rxhdr->channel);
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 = le16_to_cpu(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_get_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;
}
}
status.ssi = b43_rssi_postprocess(dev, jssi,
(phystat0 & B43_RX_PHYST0_OFDM),
(phystat0 & B43_RX_PHYST0_GAINCTL),
(phystat3 & B43_RX_PHYST3_TRSTATE));
status.noise = dev->stats.link_noise;
/* the next line looks wrong, but is what mac80211 wants */
status.signal = (jssi * 100) / B43_RX_MAX_SSI;
if (phystat0 & B43_RX_PHYST0_OFDM)
status.rate = b43_plcp_get_bitrate_ofdm(plcp);
else
status.rate = b43_plcp_get_bitrate_cck(plcp);
status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
/*
* If monitors are present get full 64-bit timestamp. 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 (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.phymode = MODE_IEEE80211A;
B43_WARN_ON(1);
/* FIXME: We don't really know which value the "chanid" contains.
* So the following assignment might be wrong. */
status.channel = chanid;
status.freq = b43_channel_to_freq_5ghz(status.channel);
break;
case B43_PHYTYPE_G:
status.phymode = MODE_IEEE80211G;
/* chanid is the radio channel cookie value as used
* to tune the radio. */
status.freq = chanid + 2400;
status.channel = b43_freq_to_channel_2ghz(status.freq);
break;
case B43_PHYTYPE_N:
status.phymode = 0xDEAD /*FIXME MODE_IEEE80211N*/;
/* chanid is the SHM channel cookie. Which is the plain
* channel number in b43. */
status.channel = chanid;
if (chanstat & B43_RX_CHAN_5GHZ)
status.freq = b43_freq_to_channel_5ghz(status.freq);
else
status.freq = b43_freq_to_channel_2ghz(status.freq);
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++;
}
b43_dma_handle_txstatus(dev, status);
}
/* Handle TX status report as received through DMA/PIO queues */
void b43_handle_hwtxstatus(struct b43_wldev *dev,
const struct b43_hwtxstatus *hw)
{
struct b43_txstatus status;
u8 tmp;
status.cookie = le16_to_cpu(hw->cookie);
status.seq = le16_to_cpu(hw->seq);
status.phy_stat = hw->phy_stat;
tmp = hw->count;
status.frame_count = (tmp >> 4);
status.rts_count = (tmp & 0x0F);
tmp = hw->flags;
status.supp_reason = ((tmp & 0x1C) >> 2);
status.pm_indicated = !!(tmp & 0x80);
status.intermediate = !!(tmp & 0x40);
status.for_ampdu = !!(tmp & 0x20);
status.acked = !!(tmp & 0x02);
b43_handle_txstatus(dev, &status);
}
/* Stop any TX operation on the device (suspend the hardware queues) */
void b43_tx_suspend(struct b43_wldev *dev)
{
b43_dma_tx_suspend(dev);
}
/* Resume any TX operation on the device (resume the hardware queues) */
void b43_tx_resume(struct b43_wldev *dev)
{
b43_dma_tx_resume(dev);
}
#if 0
static void upload_qos_parms(struct b43_wldev *dev,
const u16 * parms, u16 offset)
{
int i;
for (i = 0; i < B43_NR_QOSPARMS; i++) {
b43_shm_write16(dev, B43_SHM_SHARED,
offset + (i * 2), parms[i]);
}
}
#endif
/* Initialize the QoS parameters */
void b43_qos_init(struct b43_wldev *dev)
{
/* FIXME: This function must probably be called from the mac80211
* config callback. */
return;
b43_hf_write(dev, b43_hf_read(dev) | B43_HF_EDCF);
//FIXME kill magic
b43_write16(dev, 0x688, b43_read16(dev, 0x688) | 0x4);
/*TODO: We might need some stack support here to get the values. */
}