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authorJohannes Berg <johannes@sipsolutions.net>2008-01-24 19:38:38 +0100
committerJohn W. Linville <linville@tuxdriver.com>2008-02-29 15:19:32 -0500
commit8318d78a44d49ac1edf2bdec7299de3617c4232e (patch)
treed434634418edd7399737801615d247be06616fdd /net/mac80211/tx.c
parent10b6b80145cc93887dd8aab99bfffa375e9add31 (diff)
cfg80211 API for channels/bitrates, mac80211 and driver conversion
This patch creates new cfg80211 wiphy API for channel and bitrate registration and converts mac80211 and drivers to the new API. The old mac80211 API is completely ripped out. All drivers (except ath5k) are updated to the new API, in many cases I expect that optimisations can be done. Along with the regulatory code I've also ripped out the IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED flag, I believe it to be unnecessary if the hardware simply gives us whatever channels it wants to support and we then enable/disable them as required, which is pretty much required for travelling. Additionally, the patch adds proper "basic" rate handling for STA mode interface, AP mode interface will have to have new API added to allow userspace to set the basic rate set, currently it'll be empty... However, the basic rate handling will need to be moved to the BSS conf stuff. I do expect there to be bugs in this, especially wrt. transmit power handling where I'm basically clueless about how it should work. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/mac80211/tx.c')
-rw-r--r--net/mac80211/tx.c164
1 files changed, 102 insertions, 62 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 38e1b2bd824..9e535999198 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -92,9 +92,13 @@ static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
int rate, mrate, erp, dur, i;
struct ieee80211_rate *txrate = tx->u.tx.rate;
struct ieee80211_local *local = tx->local;
- struct ieee80211_hw_mode *mode = tx->u.tx.mode;
+ struct ieee80211_supported_band *sband;
- erp = txrate->flags & IEEE80211_RATE_ERP;
+ sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+
+ erp = 0;
+ if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+ erp = txrate->flags & IEEE80211_RATE_ERP_G;
/*
* data and mgmt (except PS Poll):
@@ -150,20 +154,36 @@ static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
* Mandatory rates for IEEE 802.11g PHY: 1, 2, 5.5, 11, 6, 12, 24 Mbps
*/
rate = -1;
- mrate = 10; /* use 1 Mbps if everything fails */
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *r = &mode->rates[i];
- if (r->rate > txrate->rate)
- break;
+ /* use lowest available if everything fails */
+ mrate = sband->bitrates[0].bitrate;
+ for (i = 0; i < sband->n_bitrates; i++) {
+ struct ieee80211_rate *r = &sband->bitrates[i];
- if (IEEE80211_RATE_MODULATION(txrate->flags) !=
- IEEE80211_RATE_MODULATION(r->flags))
- continue;
+ if (r->bitrate > txrate->bitrate)
+ break;
- if (r->flags & IEEE80211_RATE_BASIC)
- rate = r->rate;
- else if (r->flags & IEEE80211_RATE_MANDATORY)
- mrate = r->rate;
+ if (tx->sdata->basic_rates & BIT(i))
+ rate = r->bitrate;
+
+ switch (sband->band) {
+ case IEEE80211_BAND_2GHZ: {
+ u32 flag;
+ if (tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
+ flag = IEEE80211_RATE_MANDATORY_G;
+ else
+ flag = IEEE80211_RATE_MANDATORY_B;
+ if (r->flags & flag)
+ mrate = r->bitrate;
+ break;
+ }
+ case IEEE80211_BAND_5GHZ:
+ if (r->flags & IEEE80211_RATE_MANDATORY_A)
+ mrate = r->bitrate;
+ break;
+ case IEEE80211_NUM_BANDS:
+ WARN_ON(1);
+ break;
+ }
}
if (rate == -1) {
/* No matching basic rate found; use highest suitable mandatory
@@ -184,7 +204,7 @@ static u16 ieee80211_duration(struct ieee80211_txrx_data *tx, int group_addr,
dur *= 2; /* ACK + SIFS */
/* next fragment */
dur += ieee80211_frame_duration(local, next_frag_len,
- txrate->rate, erp,
+ txrate->bitrate, erp,
tx->sdata->bss_conf.use_short_preamble);
}
@@ -585,26 +605,28 @@ static ieee80211_txrx_result
ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx)
{
struct rate_selection rsel;
+ struct ieee80211_supported_band *sband;
+
+ sband = tx->local->hw.wiphy->bands[tx->local->hw.conf.channel->band];
if (likely(!tx->u.tx.rate)) {
- rate_control_get_rate(tx->dev, tx->u.tx.mode, tx->skb, &rsel);
+ rate_control_get_rate(tx->dev, sband, tx->skb, &rsel);
tx->u.tx.rate = rsel.rate;
- if (unlikely(rsel.probe != NULL)) {
+ if (unlikely(rsel.probe)) {
tx->u.tx.control->flags |=
IEEE80211_TXCTL_RATE_CTRL_PROBE;
tx->flags |= IEEE80211_TXRXD_TXPROBE_LAST_FRAG;
- tx->u.tx.control->alt_retry_rate = tx->u.tx.rate->val;
+ tx->u.tx.control->alt_retry_rate = tx->u.tx.rate;
tx->u.tx.rate = rsel.probe;
} else
- tx->u.tx.control->alt_retry_rate = -1;
+ tx->u.tx.control->alt_retry_rate = NULL;
if (!tx->u.tx.rate)
return TXRX_DROP;
} else
- tx->u.tx.control->alt_retry_rate = -1;
+ tx->u.tx.control->alt_retry_rate = NULL;
- if (tx->u.tx.mode->mode == MODE_IEEE80211G &&
- tx->sdata->bss_conf.use_cts_prot &&
+ if (tx->sdata->bss_conf.use_cts_prot &&
(tx->flags & IEEE80211_TXRXD_FRAGMENTED) && rsel.nonerp) {
tx->u.tx.last_frag_rate = tx->u.tx.rate;
if (rsel.probe)
@@ -612,13 +634,13 @@ ieee80211_tx_h_rate_ctrl(struct ieee80211_txrx_data *tx)
else
tx->flags |= IEEE80211_TXRXD_TXPROBE_LAST_FRAG;
tx->u.tx.rate = rsel.nonerp;
- tx->u.tx.control->rate = rsel.nonerp;
+ tx->u.tx.control->tx_rate = rsel.nonerp;
tx->u.tx.control->flags &= ~IEEE80211_TXCTL_RATE_CTRL_PROBE;
} else {
tx->u.tx.last_frag_rate = tx->u.tx.rate;
- tx->u.tx.control->rate = tx->u.tx.rate;
+ tx->u.tx.control->tx_rate = tx->u.tx.rate;
}
- tx->u.tx.control->tx_rate = tx->u.tx.rate->val;
+ tx->u.tx.control->tx_rate = tx->u.tx.rate;
return TXRX_CONTINUE;
}
@@ -630,7 +652,6 @@ ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
u16 fc = le16_to_cpu(hdr->frame_control);
u16 dur;
struct ieee80211_tx_control *control = tx->u.tx.control;
- struct ieee80211_hw_mode *mode = tx->u.tx.mode;
if (!control->retry_limit) {
if (!is_multicast_ether_addr(hdr->addr1)) {
@@ -657,14 +678,14 @@ ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
* frames.
* TODO: The last fragment could still use multiple retry
* rates. */
- control->alt_retry_rate = -1;
+ control->alt_retry_rate = NULL;
}
/* Use CTS protection for unicast frames sent using extended rates if
* there are associated non-ERP stations and RTS/CTS is not configured
* for the frame. */
- if (mode->mode == MODE_IEEE80211G &&
- (tx->u.tx.rate->flags & IEEE80211_RATE_ERP) &&
+ if ((tx->sdata->flags & IEEE80211_SDATA_OPERATING_GMODE) &&
+ (tx->u.tx.rate->flags & IEEE80211_RATE_ERP_G) &&
(tx->flags & IEEE80211_TXRXD_TXUNICAST) &&
tx->sdata->bss_conf.use_cts_prot &&
!(control->flags & IEEE80211_TXCTL_USE_RTS_CTS))
@@ -674,10 +695,10 @@ ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
* short preambles at the selected rate and short preambles are
* available on the network at the current point in time. */
if (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) &&
- (tx->u.tx.rate->flags & IEEE80211_RATE_PREAMBLE2) &&
+ (tx->u.tx.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
tx->sdata->bss_conf.use_short_preamble &&
(!tx->sta || (tx->sta->flags & WLAN_STA_SHORT_PREAMBLE))) {
- tx->u.tx.control->tx_rate = tx->u.tx.rate->val2;
+ tx->u.tx.control->flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
}
/* Setup duration field for the first fragment of the frame. Duration
@@ -690,19 +711,33 @@ ieee80211_tx_h_misc(struct ieee80211_txrx_data *tx)
if ((control->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
(control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
- struct ieee80211_rate *rate;
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_rate *rate, *baserate;
+ int idx;
+
+ sband = tx->local->hw.wiphy->bands[
+ tx->local->hw.conf.channel->band];
/* Do not use multiple retry rates when using RTS/CTS */
- control->alt_retry_rate = -1;
+ control->alt_retry_rate = NULL;
/* Use min(data rate, max base rate) as CTS/RTS rate */
rate = tx->u.tx.rate;
- while (rate > mode->rates &&
- !(rate->flags & IEEE80211_RATE_BASIC))
- rate--;
+ baserate = NULL;
+
+ for (idx = 0; idx < sband->n_bitrates; idx++) {
+ if (sband->bitrates[idx].bitrate > rate->bitrate)
+ continue;
+ if (tx->sdata->basic_rates & BIT(idx) &&
+ (!baserate ||
+ (baserate->bitrate < sband->bitrates[idx].bitrate)))
+ baserate = &sband->bitrates[idx];
+ }
- control->rts_cts_rate = rate->val;
- control->rts_rate = rate;
+ if (baserate)
+ control->rts_cts_rate = baserate;
+ else
+ control->rts_cts_rate = &sband->bitrates[0];
}
if (tx->sta) {
@@ -726,10 +761,10 @@ static ieee80211_txrx_result
ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
{
struct ieee80211_local *local = tx->local;
- struct ieee80211_hw_mode *mode = tx->u.tx.mode;
struct sk_buff *skb = tx->skb;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
u32 load = 0, hdrtime;
+ struct ieee80211_rate *rate = tx->u.tx.rate;
/* TODO: this could be part of tx_status handling, so that the number
* of retries would be known; TX rate should in that case be stored
@@ -740,9 +775,9 @@ ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
/* 1 bit at 1 Mbit/s takes 1 usec; in channel_use values,
* 1 usec = 1/8 * (1080 / 10) = 13.5 */
- if (mode->mode == MODE_IEEE80211A ||
- (mode->mode == MODE_IEEE80211G &&
- tx->u.tx.rate->flags & IEEE80211_RATE_ERP))
+ if (tx->u.tx.channel->band == IEEE80211_BAND_5GHZ ||
+ (tx->u.tx.channel->band == IEEE80211_BAND_2GHZ &&
+ rate->flags & IEEE80211_RATE_ERP_G))
hdrtime = CHAN_UTIL_HDR_SHORT;
else
hdrtime = CHAN_UTIL_HDR_LONG;
@@ -756,14 +791,15 @@ ieee80211_tx_h_load_stats(struct ieee80211_txrx_data *tx)
else if (tx->u.tx.control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
load += hdrtime;
- load += skb->len * tx->u.tx.rate->rate_inv;
+ /* TODO: optimise again */
+ load += skb->len * CHAN_UTIL_RATE_LCM / rate->bitrate;
if (tx->u.tx.extra_frag) {
int i;
for (i = 0; i < tx->u.tx.num_extra_frag; i++) {
load += 2 * hdrtime;
load += tx->u.tx.extra_frag[i]->len *
- tx->u.tx.rate->rate;
+ tx->u.tx.rate->bitrate;
}
}
@@ -816,10 +852,12 @@ __ieee80211_parse_tx_radiotap(struct ieee80211_txrx_data *tx,
struct ieee80211_radiotap_iterator iterator;
struct ieee80211_radiotap_header *rthdr =
(struct ieee80211_radiotap_header *) skb->data;
- struct ieee80211_hw_mode *mode = tx->local->hw.conf.mode;
+ struct ieee80211_supported_band *sband;
int ret = ieee80211_radiotap_iterator_init(&iterator, rthdr, skb->len);
struct ieee80211_tx_control *control = tx->u.tx.control;
+ sband = tx->local->hw.wiphy->bands[tx->local->hw.conf.channel->band];
+
control->flags |= IEEE80211_TXCTL_DO_NOT_ENCRYPT;
tx->flags |= IEEE80211_TXRXD_TX_INJECTED;
tx->flags &= ~IEEE80211_TXRXD_FRAGMENTED;
@@ -852,10 +890,12 @@ __ieee80211_parse_tx_radiotap(struct ieee80211_txrx_data *tx,
* ieee80211 rate int is in 100kbps units eg, 0x0a=1Mbps
*/
target_rate = (*iterator.this_arg) * 5;
- for (i = 0; i < mode->num_rates; i++) {
- struct ieee80211_rate *r = &mode->rates[i];
+ for (i = 0; i < sband->n_bitrates; i++) {
+ struct ieee80211_rate *r;
- if (r->rate == target_rate) {
+ r = &sband->bitrates[i];
+
+ if (r->bitrate == target_rate) {
tx->u.tx.rate = r;
break;
}
@@ -870,9 +910,11 @@ __ieee80211_parse_tx_radiotap(struct ieee80211_txrx_data *tx,
control->antenna_sel_tx = (*iterator.this_arg) + 1;
break;
+#if 0
case IEEE80211_RADIOTAP_DBM_TX_POWER:
control->power_level = *iterator.this_arg;
break;
+#endif
case IEEE80211_RADIOTAP_FLAGS:
if (*iterator.this_arg & IEEE80211_RADIOTAP_F_FCS) {
@@ -1054,8 +1096,8 @@ static int __ieee80211_tx(struct ieee80211_local *local, struct sk_buff *skb,
if (__ieee80211_queue_stopped(local, control->queue))
return IEEE80211_TX_FRAG_AGAIN;
if (i == tx->u.tx.num_extra_frag) {
- control->tx_rate = tx->u.tx.last_frag_hwrate;
- control->rate = tx->u.tx.last_frag_rate;
+ control->tx_rate = tx->u.tx.last_frag_rate;
+
if (tx->flags & IEEE80211_TXRXD_TXPROBE_LAST_FRAG)
control->flags |=
IEEE80211_TXCTL_RATE_CTRL_PROBE;
@@ -1114,7 +1156,7 @@ static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
rcu_read_lock();
sta = tx.sta;
- tx.u.tx.mode = local->hw.conf.mode;
+ tx.u.tx.channel = local->hw.conf.channel;
for (handler = local->tx_handlers; *handler != NULL;
handler++) {
@@ -1151,7 +1193,6 @@ static int ieee80211_tx(struct net_device *dev, struct sk_buff *skb,
} else {
next_len = 0;
tx.u.tx.rate = tx.u.tx.last_frag_rate;
- tx.u.tx.last_frag_hwrate = tx.u.tx.rate->val;
}
dur = ieee80211_duration(&tx, 0, next_len);
hdr->duration_id = cpu_to_le16(dur);
@@ -1188,7 +1229,6 @@ retry:
store->skb = skb;
store->extra_frag = tx.u.tx.extra_frag;
store->num_extra_frag = tx.u.tx.num_extra_frag;
- store->last_frag_hwrate = tx.u.tx.last_frag_hwrate;
store->last_frag_rate = tx.u.tx.last_frag_rate;
store->last_frag_rate_ctrl_probe =
!!(tx.flags & IEEE80211_TXRXD_TXPROBE_LAST_FRAG);
@@ -1609,7 +1649,6 @@ void ieee80211_tx_pending(unsigned long data)
tx.u.tx.control = &store->control;
tx.u.tx.extra_frag = store->extra_frag;
tx.u.tx.num_extra_frag = store->num_extra_frag;
- tx.u.tx.last_frag_hwrate = store->last_frag_hwrate;
tx.u.tx.last_frag_rate = store->last_frag_rate;
tx.flags = 0;
if (store->last_frag_rate_ctrl_probe)
@@ -1712,6 +1751,9 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
struct ieee80211_if_ap *ap = NULL;
struct rate_selection rsel;
struct beacon_data *beacon;
+ struct ieee80211_supported_band *sband;
+
+ sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
rcu_read_lock();
@@ -1750,8 +1792,7 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
beacon->tail_len);
if (control) {
- rate_control_get_rate(local->mdev, local->oper_hw_mode, skb,
- &rsel);
+ rate_control_get_rate(local->mdev, sband, skb, &rsel);
if (!rsel.rate) {
if (net_ratelimit()) {
printk(KERN_DEBUG "%s: ieee80211_beacon_get: "
@@ -1764,12 +1805,11 @@ struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
}
control->vif = vif;
- control->tx_rate =
- (sdata->bss_conf.use_short_preamble &&
- (rsel.rate->flags & IEEE80211_RATE_PREAMBLE2)) ?
- rsel.rate->val2 : rsel.rate->val;
+ control->tx_rate = rsel.rate;
+ if (sdata->bss_conf.use_short_preamble &&
+ rsel.rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
+ control->flags |= IEEE80211_TXCTL_SHORT_PREAMBLE;
control->antenna_sel_tx = local->hw.conf.antenna_sel_tx;
- control->power_level = local->hw.conf.power_level;
control->flags |= IEEE80211_TXCTL_NO_ACK;
control->retry_limit = 1;
control->flags |= IEEE80211_TXCTL_CLEAR_DST_MASK;
@@ -1874,7 +1914,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
}
sta = tx.sta;
tx.flags |= IEEE80211_TXRXD_TXPS_BUFFERED;
- tx.u.tx.mode = local->hw.conf.mode;
+ tx.u.tx.channel = local->hw.conf.channel;
for (handler = local->tx_handlers; *handler != NULL; handler++) {
res = (*handler)(&tx);