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mac80211: add HE 6 GHz Band Capability element
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Construct HE 6 GHz band capability element (IEEE 802.11ax/D6.0,
9.4.2.261) for association request and mesh beacon. The 6 GHz
capability information is passed by driver through iftypes caps.

Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Link: https://lore.kernel.org/r/1589399105-25472-7-git-send-email-rmanohar@codeaurora.org
[handle SMPS, adjust for previous patches, reserve SKB space properly,
 change to handle SKB directly]
Link: https://lore.kernel.org/r/20200528213443.643aa8101111.I3f9747c1147480f65445f13eda5c4a5ed4e86757@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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Rajkumar Manoharan authored and Johannes Berg committed May 31, 2020
1 parent 2239521 commit 24a2042
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Showing 6 changed files with 65 additions and 1 deletion.
2 changes: 2 additions & 0 deletions net/mac80211/ieee80211_i.h
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Original file line number Diff line number Diff line change
Expand Up @@ -2177,6 +2177,8 @@ u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype);
u8 *ieee80211_ie_build_he_cap(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,
struct sk_buff *skb);
u8 *ieee80211_ie_build_he_oper(u8 *pos);
int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
const struct ieee80211_supported_band *sband,
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9 changes: 9 additions & 0 deletions net/mac80211/mesh.c
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Original file line number Diff line number Diff line change
Expand Up @@ -587,6 +587,13 @@ int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
return 0;
}

int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
ieee80211_ie_build_he_6ghz_cap(sdata, skb);
return 0;
}

static void ieee80211_mesh_path_timer(struct timer_list *t)
{
struct ieee80211_sub_if_data *sdata =
Expand Down Expand Up @@ -766,6 +773,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
2 + sizeof(struct ieee80211_vht_operation) +
ie_len_he_cap +
2 + 1 + sizeof(struct ieee80211_he_operation) +
2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
ifmsh->ie_len;

bcn = kzalloc(sizeof(*bcn) + head_len + tail_len, GFP_KERNEL);
Expand Down Expand Up @@ -885,6 +893,7 @@ ieee80211_mesh_build_beacon(struct ieee80211_if_mesh *ifmsh)
mesh_add_vht_oper_ie(sdata, skb) ||
mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
mesh_add_he_oper_ie(sdata, skb) ||
mesh_add_he_6ghz_cap_ie(sdata, skb) ||
mesh_add_vendor_ies(sdata, skb))
goto out_free;

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2 changes: 2 additions & 0 deletions net/mac80211/mesh.h
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Original file line number Diff line number Diff line change
Expand Up @@ -222,6 +222,8 @@ int mesh_add_he_cap_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb, u8 ie_len);
int mesh_add_he_oper_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb);
int mesh_add_he_6ghz_cap_ie(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb);
void mesh_rmc_free(struct ieee80211_sub_if_data *sdata);
int mesh_rmc_init(struct ieee80211_sub_if_data *sdata);
void ieee80211s_init(void);
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4 changes: 3 additions & 1 deletion net/mac80211/mesh_plink.c
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Original file line number Diff line number Diff line change
Expand Up @@ -238,6 +238,7 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
2 + sizeof(struct ieee80211_vht_operation) +
ie_len_he_cap +
2 + 1 + sizeof(struct ieee80211_he_operation) +
2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
2 + 8 + /* peering IE */
sdata->u.mesh.ie_len);
if (!skb)
Expand Down Expand Up @@ -328,7 +329,8 @@ static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
mesh_add_vht_cap_ie(sdata, skb) ||
mesh_add_vht_oper_ie(sdata, skb) ||
mesh_add_he_cap_ie(sdata, skb, ie_len_he_cap) ||
mesh_add_he_oper_ie(sdata, skb))
mesh_add_he_oper_ie(sdata, skb) ||
mesh_add_he_6ghz_cap_ie(sdata, skb))
goto free;
}

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3 changes: 3 additions & 0 deletions net/mac80211/mlme.c
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Original file line number Diff line number Diff line change
Expand Up @@ -658,6 +658,8 @@ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
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);

ieee80211_ie_build_he_6ghz_cap(sdata, skb);
}

static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
Expand Down Expand Up @@ -731,6 +733,7 @@ static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
2 + 1 + sizeof(struct ieee80211_he_cap_elem) + /* HE */
sizeof(struct ieee80211_he_mcs_nss_supp) +
IEEE80211_HE_PPE_THRES_MAX_LEN +
2 + 1 + sizeof(struct ieee80211_he_6ghz_capa) +
assoc_data->ie_len + /* extra IEs */
(assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) +
9, /* WMM */
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46 changes: 46 additions & 0 deletions net/mac80211/util.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2839,6 +2839,52 @@ u8 *ieee80211_ie_build_he_cap(u8 *pos,
return pos;
}

void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb)
{
struct ieee80211_supported_band *sband;
const struct ieee80211_sband_iftype_data *iftd;
enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
u8 *pos;
u16 cap;

sband = ieee80211_get_sband(sdata);
if (!sband)
return;

iftd = ieee80211_get_sband_iftype_data(sband, iftype);
if (WARN_ON(!iftd))
return;

cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;

switch (sdata->smps_mode) {
case IEEE80211_SMPS_AUTOMATIC:
case IEEE80211_SMPS_NUM_MODES:
WARN_ON(1);
/* fall through */
case IEEE80211_SMPS_OFF:
cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
IEEE80211_HE_6GHZ_CAP_SM_PS);
break;
case IEEE80211_SMPS_STATIC:
cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
IEEE80211_HE_6GHZ_CAP_SM_PS);
break;
case IEEE80211_SMPS_DYNAMIC:
cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
IEEE80211_HE_6GHZ_CAP_SM_PS);
break;
}

pos = skb_put(skb, 2 + 1 + sizeof(cap));
*pos++ = WLAN_EID_EXTENSION;
*pos++ = 1 + sizeof(cap);
*pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
put_unaligned_le16(cap, pos);
}

u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
const struct cfg80211_chan_def *chandef,
u16 prot_mode, bool rifs_mode)
Expand Down

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