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mac80211: refactor HT/VHT to chandef code 

The station MLME and IBSS/mesh ones use entirely different
code for interpreting HT and VHT operation elements. Change
the code that interprets them a bit - it now modifies an
existing chandef - and use it also in the MLME code.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2015-12-18 15:08:34 +01:00
parent de3bb771f4
commit 8ac3c70419
5 changed files with 47 additions and 79 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
net/mac80211/ibss.c
View File

@ -1050,9 +1050,8 @@ static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata,
struct cfg80211_chan_def chandef;
enum ieee80211_sta_rx_bandwidth bw = sta->sta.bandwidth;
ieee80211_ht_oper_to_chandef(channel,
elems->ht_operation,
&chandef);
cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
ieee80211_chandef_ht_oper(elems->ht_operation, &chandef);
memcpy(&htcap_ie, elems->ht_cap_elem, sizeof(htcap_ie));
rates_updated |= ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
@ -1066,9 +1065,8 @@ static void ieee80211_update_sta_info(struct ieee80211_sub_if_data *sdata,
struct ieee80211_vht_cap cap_ie;
struct ieee80211_sta_vht_cap cap = sta->sta.vht_cap;
ieee80211_vht_oper_to_chandef(channel,
elems->vht_operation,
&chandef);
ieee80211_chandef_vht_oper(elems->vht_operation,
&chandef);
memcpy(&cap_ie, elems->vht_cap_elem, sizeof(cap_ie));
ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
&cap_ie, sta);

10
net/mac80211/ieee80211_i.h
View File

@ -1988,12 +1988,10 @@ int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
/* channel management */
void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
const struct ieee80211_ht_operation *ht_oper,
struct cfg80211_chan_def *chandef);
void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
const struct ieee80211_vht_operation *oper,
struct cfg80211_chan_def *chandef);
bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
struct cfg80211_chan_def *chandef);
bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
struct cfg80211_chan_def *chandef);
u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
int __must_check

9
net/mac80211/mesh.c
View File

@ -91,11 +91,10 @@ bool mesh_matches_local(struct ieee80211_sub_if_data *sdata,
if (sdata->vif.bss_conf.basic_rates != basic_rates)
return false;
ieee80211_ht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
ie->ht_operation, &sta_chan_def);
ieee80211_vht_oper_to_chandef(sdata->vif.bss_conf.chandef.chan,
ie->vht_operation, &sta_chan_def);
cfg80211_chandef_create(&sta_chan_def, sdata->vif.bss_conf.chandef.chan,
NL80211_CHAN_NO_HT);
ieee80211_chandef_ht_oper(ie->ht_operation, &sta_chan_def);
ieee80211_chandef_vht_oper(ie->vht_operation, &sta_chan_def);
if (!cfg80211_chandef_compatible(&sdata->vif.bss_conf.chandef,
&sta_chan_def))

41
net/mac80211/mlme.c
View File

@ -196,16 +196,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
/* check 40 MHz support, if we have it */
if (sta_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;
}
ieee80211_chandef_ht_oper(ht_oper, chandef);
} else {
/* 40 MHz (and 80 MHz) must be supported for VHT */
ret = IEEE80211_STA_DISABLE_VHT;
@ -219,35 +210,11 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
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;
switch (vht_oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_USE_HT:
vht_chandef.width = chandef->width;
vht_chandef.center_freq1 = chandef->center_freq1;
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;
vht_chandef.center_freq2 =
ieee80211_channel_to_frequency(
vht_oper->center_freq_seg2_idx,
channel->band);
break;
default:
vht_chandef = *chandef;
if (!ieee80211_chandef_vht_oper(vht_oper, &vht_chandef)) {
if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
sdata_info(sdata,
"AP VHT operation IE has invalid channel width (%d), disable VHT\n",
vht_oper->chan_width);
"AP VHT information is invalid, disable VHT\n");
ret = IEEE80211_STA_DISABLE_VHT;
goto out;
}

56
net/mac80211/util.c
View File

@ -2383,17 +2383,13 @@ u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
return pos + sizeof(struct ieee80211_vht_operation);
}
void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
const struct ieee80211_ht_operation *ht_oper,
struct cfg80211_chan_def *chandef)
bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
struct cfg80211_chan_def *chandef)
{
enum nl80211_channel_type channel_type;
if (!ht_oper) {
cfg80211_chandef_create(chandef, control_chan,
NL80211_CHAN_NO_HT);
return;
}
if (!ht_oper)
return false;
switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
case IEEE80211_HT_PARAM_CHA_SEC_NONE:
@ -2407,42 +2403,52 @@ void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
break;
default:
channel_type = NL80211_CHAN_NO_HT;
return false;
}
cfg80211_chandef_create(chandef, control_chan, channel_type);
cfg80211_chandef_create(chandef, chandef->chan, channel_type);
return true;
}
void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
const struct ieee80211_vht_operation *oper,
struct cfg80211_chan_def *chandef)
bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
struct cfg80211_chan_def *chandef)
{
if (!oper)
return;
struct cfg80211_chan_def new = *chandef;
int cf1, cf2;
chandef->chan = control_chan;
if (!oper)
return false;
cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
chandef->chan->band);
cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
chandef->chan->band);
switch (oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_USE_HT:
break;
case IEEE80211_VHT_CHANWIDTH_80MHZ:
chandef->width = NL80211_CHAN_WIDTH_80;
new.width = NL80211_CHAN_WIDTH_80;
new.center_freq1 = cf1;
break;
case IEEE80211_VHT_CHANWIDTH_160MHZ:
chandef->width = NL80211_CHAN_WIDTH_160;
new.width = NL80211_CHAN_WIDTH_160;
new.center_freq1 = cf1;
break;
case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
chandef->width = NL80211_CHAN_WIDTH_80P80;
new.width = NL80211_CHAN_WIDTH_80P80;
new.center_freq1 = cf1;
new.center_freq2 = cf2;
break;
default:
break;
return false;
}
chandef->center_freq1 =
ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
control_chan->band);
chandef->center_freq2 =
ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
control_chan->band);
if (!cfg80211_chandef_valid(&new))
return false;
*chandef = new;
return true;
}
int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,