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mac80211: limit bandwidth in HE capabilities

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[ Upstream commit 1f2c104448 ]

If we're limiting bandwidth for some reason such as regulatory
restrictions, then advertise that limitation just like we do
for VHT today, so the AP is aware we cannot use the higher BW
it might be using.

Fixes: 41cbb0f5a2 ("mac80211: add support for HE")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20220202104617.70c8e3e7ee76.If317630de69ff1146bec7d47f5b83038695eb71d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johannes Berg 2022-02-02 10:49:34 +02:00 committed by Greg Kroah-Hartman
parent a41efae062
commit 0aec294f2d
4 changed files with 32 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
net/mac80211/ieee80211_i.h
View file

@ -2379,7 +2379,7 @@ u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
const struct cfg80211_chan_def *chandef);
u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
u8 *ieee80211_ie_build_he_cap(u8 *pos,
u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
const struct ieee80211_sta_he_cap *he_cap,
u8 *end);
void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,

2
net/mac80211/mesh.c
View file

@ -580,7 +580,7 @@ int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
return -ENOMEM;
pos = skb_put(skb, ie_len);
ieee80211_ie_build_he_cap(pos, he_cap, pos + ie_len);
ieee80211_ie_build_he_cap(0, pos, he_cap, pos + ie_len);
return 0;
}

11
net/mac80211/mlme.c
View file

@ -630,7 +630,7 @@ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb,
struct ieee80211_supported_band *sband)
{
u8 *pos;
u8 *pos, *pre_he_pos;
const struct ieee80211_sta_he_cap *he_cap = NULL;
struct ieee80211_chanctx_conf *chanctx_conf;
u8 he_cap_size;
@ -647,16 +647,21 @@ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
he_cap = ieee80211_get_he_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif));
if (!he_cap || !reg_cap)
if (!he_cap || !chanctx_conf || !reg_cap)
return;
/* get a max size estimate */
he_cap_size =
2 + 1 + sizeof(he_cap->he_cap_elem) +
ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem) +
ieee80211_he_ppe_size(he_cap->ppe_thres[0],
he_cap->he_cap_elem.phy_cap_info);
pos = skb_put(skb, he_cap_size);
ieee80211_ie_build_he_cap(pos, he_cap, pos + he_cap_size);
pre_he_pos = pos;
pos = ieee80211_ie_build_he_cap(sdata->u.mgd.flags,
pos, he_cap, pos + he_cap_size);
/* trim excess if any */
skb_trim(skb, skb->len - (pre_he_pos + he_cap_size - pos));
ieee80211_ie_build_he_6ghz_cap(sdata, skb);
}

27
net/mac80211/util.c
View file

@ -1959,7 +1959,7 @@ static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
if (he_cap &&
cfg80211_any_usable_channels(local->hw.wiphy, BIT(sband->band),
IEEE80211_CHAN_NO_HE)) {
pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
pos = ieee80211_ie_build_he_cap(0, pos, he_cap, end);
if (!pos)
goto out_err;
}
@ -2903,10 +2903,11 @@ u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
he_cap->he_cap_elem.phy_cap_info);
}
u8 *ieee80211_ie_build_he_cap(u8 *pos,
u8 *ieee80211_ie_build_he_cap(u32 disable_flags, u8 *pos,
const struct ieee80211_sta_he_cap *he_cap,
u8 *end)
{
struct ieee80211_he_cap_elem elem;
u8 n;
u8 ie_len;
u8 *orig_pos = pos;
@ -2919,7 +2920,23 @@ u8 *ieee80211_ie_build_he_cap(u8 *pos,
if (!he_cap)
return orig_pos;
n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
/* modify on stack first to calculate 'n' and 'ie_len' correctly */
elem = he_cap->he_cap_elem;
if (disable_flags & IEEE80211_STA_DISABLE_40MHZ)
elem.phy_cap_info[0] &=
~(IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G |
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G);
if (disable_flags & IEEE80211_STA_DISABLE_160MHZ)
elem.phy_cap_info[0] &=
~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
if (disable_flags & IEEE80211_STA_DISABLE_80P80MHZ)
elem.phy_cap_info[0] &=
~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
n = ieee80211_he_mcs_nss_size(&elem);
ie_len = 2 + 1 +
sizeof(he_cap->he_cap_elem) + n +
ieee80211_he_ppe_size(he_cap->ppe_thres[0],
@ -2933,8 +2950,8 @@ u8 *ieee80211_ie_build_he_cap(u8 *pos,
*pos++ = WLAN_EID_EXT_HE_CAPABILITY;
/* Fixed data */
memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
pos += sizeof(he_cap->he_cap_elem);
memcpy(pos, &elem, sizeof(elem));
pos += sizeof(elem);
memcpy(pos, &he_cap->he_mcs_nss_supp, n);
pos += n;