Commit 6565ec9b authored by Johannes Berg's avatar Johannes Berg

mac80211: move ieee80211_determine_chantype function

The next patch will need it further up in the file, so
move it unchanged now.
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 2c9b7359
......@@ -174,6 +174,201 @@ static int ecw2cw(int ecw)
return (1 << ecw) - 1;
}
static u32 chandef_downgrade(struct cfg80211_chan_def *c)
{
u32 ret;
int tmp;
switch (c->width) {
case NL80211_CHAN_WIDTH_20:
c->width = NL80211_CHAN_WIDTH_20_NOHT;
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
break;
case NL80211_CHAN_WIDTH_40:
c->width = NL80211_CHAN_WIDTH_20;
c->center_freq1 = c->chan->center_freq;
ret = IEEE80211_STA_DISABLE_40MHZ |
IEEE80211_STA_DISABLE_VHT;
break;
case NL80211_CHAN_WIDTH_80:
tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
/* n_P40 */
tmp /= 2;
/* freq_P40 */
c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
c->width = NL80211_CHAN_WIDTH_40;
ret = IEEE80211_STA_DISABLE_VHT;
break;
case NL80211_CHAN_WIDTH_80P80:
c->center_freq2 = 0;
c->width = NL80211_CHAN_WIDTH_80;
ret = IEEE80211_STA_DISABLE_80P80MHZ |
IEEE80211_STA_DISABLE_160MHZ;
break;
case NL80211_CHAN_WIDTH_160:
/* n_P20 */
tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
/* n_P80 */
tmp /= 4;
c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
c->width = NL80211_CHAN_WIDTH_80;
ret = IEEE80211_STA_DISABLE_80P80MHZ |
IEEE80211_STA_DISABLE_160MHZ;
break;
default:
case NL80211_CHAN_WIDTH_20_NOHT:
WARN_ON_ONCE(1);
c->width = NL80211_CHAN_WIDTH_20_NOHT;
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
break;
}
WARN_ON_ONCE(!cfg80211_chandef_valid(c));
return ret;
}
static u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct ieee80211_channel *channel,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
struct cfg80211_chan_def *chandef)
{
struct cfg80211_chan_def vht_chandef;
u32 ht_cfreq, ret;
chandef->chan = channel;
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
chandef->center_freq1 = channel->center_freq;
chandef->center_freq2 = 0;
if (!ht_oper || !sband->ht_cap.ht_supported) {
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
goto out;
}
chandef->width = NL80211_CHAN_WIDTH_20;
ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
channel->band);
/* check that channel matches the right operating channel */
if (channel->center_freq != ht_cfreq) {
/*
* It's possible that some APs are confused here;
* Netgear WNDR3700 sometimes reports 4 higher than
* the actual channel in association responses, but
* since we look at probe response/beacon data here
* it should be OK.
*/
sdata_info(sdata,
"Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
channel->center_freq, ht_cfreq,
ht_oper->primary_chan, channel->band);
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
goto out;
}
/* check 40 MHz support, if we have it */
if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
chandef->width = NL80211_CHAN_WIDTH_40;
chandef->center_freq1 += 10;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
chandef->width = NL80211_CHAN_WIDTH_40;
chandef->center_freq1 -= 10;
break;
}
} else {
/* 40 MHz (and 80 MHz) must be supported for VHT */
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (!vht_oper || !sband->vht_cap.vht_supported) {
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
vht_chandef.chan = channel;
vht_chandef.center_freq1 =
ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
channel->band);
vht_chandef.center_freq2 = 0;
if (vht_oper->center_freq_seg2_idx)
vht_chandef.center_freq2 =
ieee80211_channel_to_frequency(
vht_oper->center_freq_seg2_idx,
channel->band);
switch (vht_oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_USE_HT:
vht_chandef.width = chandef->width;
break;
case IEEE80211_VHT_CHANWIDTH_80MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_80;
break;
case IEEE80211_VHT_CHANWIDTH_160MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_160;
break;
case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
break;
default:
sdata_info(sdata,
"AP VHT operation IE has invalid channel width (%d), disable VHT\n",
vht_oper->chan_width);
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (!cfg80211_chandef_valid(&vht_chandef)) {
sdata_info(sdata,
"AP VHT information is invalid, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
ret = 0;
goto out;
}
if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
sdata_info(sdata,
"AP VHT information doesn't match HT, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
*chandef = vht_chandef;
ret = 0;
out:
while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
IEEE80211_CHAN_DISABLED)) {
if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
ret = IEEE80211_STA_DISABLE_HT |
IEEE80211_STA_DISABLE_VHT;
goto out;
}
ret |= chandef_downgrade(chandef);
}
if (chandef->width != vht_chandef.width)
sdata_info(sdata,
"capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
return ret;
}
static u32 ieee80211_config_ht_tx(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct ieee80211_ht_operation *ht_oper,
......@@ -3321,201 +3516,6 @@ int ieee80211_max_network_latency(struct notifier_block *nb,
return 0;
}
static u32 chandef_downgrade(struct cfg80211_chan_def *c)
{
u32 ret;
int tmp;
switch (c->width) {
case NL80211_CHAN_WIDTH_20:
c->width = NL80211_CHAN_WIDTH_20_NOHT;
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
break;
case NL80211_CHAN_WIDTH_40:
c->width = NL80211_CHAN_WIDTH_20;
c->center_freq1 = c->chan->center_freq;
ret = IEEE80211_STA_DISABLE_40MHZ |
IEEE80211_STA_DISABLE_VHT;
break;
case NL80211_CHAN_WIDTH_80:
tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
/* n_P40 */
tmp /= 2;
/* freq_P40 */
c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
c->width = NL80211_CHAN_WIDTH_40;
ret = IEEE80211_STA_DISABLE_VHT;
break;
case NL80211_CHAN_WIDTH_80P80:
c->center_freq2 = 0;
c->width = NL80211_CHAN_WIDTH_80;
ret = IEEE80211_STA_DISABLE_80P80MHZ |
IEEE80211_STA_DISABLE_160MHZ;
break;
case NL80211_CHAN_WIDTH_160:
/* n_P20 */
tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
/* n_P80 */
tmp /= 4;
c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
c->width = NL80211_CHAN_WIDTH_80;
ret = IEEE80211_STA_DISABLE_80P80MHZ |
IEEE80211_STA_DISABLE_160MHZ;
break;
default:
case NL80211_CHAN_WIDTH_20_NOHT:
WARN_ON_ONCE(1);
c->width = NL80211_CHAN_WIDTH_20_NOHT;
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
break;
}
WARN_ON_ONCE(!cfg80211_chandef_valid(c));
return ret;
}
static u32
ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
struct ieee80211_channel *channel,
const struct ieee80211_ht_operation *ht_oper,
const struct ieee80211_vht_operation *vht_oper,
struct cfg80211_chan_def *chandef)
{
struct cfg80211_chan_def vht_chandef;
u32 ht_cfreq, ret;
chandef->chan = channel;
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
chandef->center_freq1 = channel->center_freq;
chandef->center_freq2 = 0;
if (!ht_oper || !sband->ht_cap.ht_supported) {
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
goto out;
}
chandef->width = NL80211_CHAN_WIDTH_20;
ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
channel->band);
/* check that channel matches the right operating channel */
if (channel->center_freq != ht_cfreq) {
/*
* It's possible that some APs are confused here;
* Netgear WNDR3700 sometimes reports 4 higher than
* the actual channel in association responses, but
* since we look at probe response/beacon data here
* it should be OK.
*/
sdata_info(sdata,
"Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
channel->center_freq, ht_cfreq,
ht_oper->primary_chan, channel->band);
ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
goto out;
}
/* check 40 MHz support, if we have it */
if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
chandef->width = NL80211_CHAN_WIDTH_40;
chandef->center_freq1 += 10;
break;
case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
chandef->width = NL80211_CHAN_WIDTH_40;
chandef->center_freq1 -= 10;
break;
}
} else {
/* 40 MHz (and 80 MHz) must be supported for VHT */
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (!vht_oper || !sband->vht_cap.vht_supported) {
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
vht_chandef.chan = channel;
vht_chandef.center_freq1 =
ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
channel->band);
vht_chandef.center_freq2 = 0;
if (vht_oper->center_freq_seg2_idx)
vht_chandef.center_freq2 =
ieee80211_channel_to_frequency(
vht_oper->center_freq_seg2_idx,
channel->band);
switch (vht_oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_USE_HT:
vht_chandef.width = chandef->width;
break;
case IEEE80211_VHT_CHANWIDTH_80MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_80;
break;
case IEEE80211_VHT_CHANWIDTH_160MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_160;
break;
case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
break;
default:
sdata_info(sdata,
"AP VHT operation IE has invalid channel width (%d), disable VHT\n",
vht_oper->chan_width);
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (!cfg80211_chandef_valid(&vht_chandef)) {
sdata_info(sdata,
"AP VHT information is invalid, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
ret = 0;
goto out;
}
if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
sdata_info(sdata,
"AP VHT information doesn't match HT, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}
*chandef = vht_chandef;
ret = 0;
out:
while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
IEEE80211_CHAN_DISABLED)) {
if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
ret = IEEE80211_STA_DISABLE_HT |
IEEE80211_STA_DISABLE_VHT;
goto out;
}
ret |= chandef_downgrade(chandef);
}
if (chandef->width != vht_chandef.width)
sdata_info(sdata,
"capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
return ret;
}
static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
struct cfg80211_bss *cbss)
{
......
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