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mac80211: build HE operation with 6 GHz oper information

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Add 6 GHz operation information (IEEE 802.11ax/D6.0, Figure 9-787k)
while building HE operation element for non-HE AP. This field is used to
determine channel information in the absence of HT/VHT IEs.

Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Link: https://lore.kernel.org/r/1589399105-25472-8-git-send-email-rmanohar@codeaurora.org
[fix skb allocation size]
Link: https://lore.kernel.org/r/20200528193455.76796-1-johannes@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Rajkumar Manoharan
2020-05-28 21:34:33 +02:00
committed by Johannes Berg
parent 24a2042cb2
commit d1b7524b3e
4 changed files with 72 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
net/mac80211/util.c
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@@ -3008,13 +3008,18 @@ u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
return pos + sizeof(struct ieee80211_vht_operation);
}
u8 *ieee80211_ie_build_he_oper(u8 *pos)
u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
{
struct ieee80211_he_operation *he_oper;
struct ieee80211_he_6ghz_oper *he_6ghz_op;
u32 he_oper_params;
u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
if (chandef->chan->band == NL80211_BAND_6GHZ)
ie_len += sizeof(struct ieee80211_he_6ghz_oper);
*pos++ = WLAN_EID_EXTENSION;
*pos++ = 1 + sizeof(struct ieee80211_he_operation);
*pos++ = ie_len;
*pos++ = WLAN_EID_EXT_HE_OPERATION;
he_oper_params = 0;
@@ -3024,16 +3029,68 @@ u8 *ieee80211_ie_build_he_oper(u8 *pos)
IEEE80211_HE_OPERATION_ER_SU_DISABLE);
he_oper_params |= u32_encode_bits(1,
IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
if (chandef->chan->band == NL80211_BAND_6GHZ)
he_oper_params |= u32_encode_bits(1,
IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
he_oper = (struct ieee80211_he_operation *)pos;
he_oper->he_oper_params = cpu_to_le32(he_oper_params);
/* don't require special HE peer rates */
he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
pos += sizeof(struct ieee80211_he_operation);
/* TODO add VHT operational and 6GHz operational subelement? */
if (chandef->chan->band != NL80211_BAND_6GHZ)
goto out;
return pos + sizeof(struct ieee80211_vht_operation);
/* TODO add VHT operational */
he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
he_6ghz_op->minrate = 6; /* 6 Mbps */
he_6ghz_op->primary =
ieee80211_frequency_to_channel(chandef->chan->center_freq);
he_6ghz_op->ccfs0 =
ieee80211_frequency_to_channel(chandef->center_freq1);
if (chandef->center_freq2)
he_6ghz_op->ccfs1 =
ieee80211_frequency_to_channel(chandef->center_freq2);
else
he_6ghz_op->ccfs1 = 0;
switch (chandef->width) {
case NL80211_CHAN_WIDTH_160:
/* Convert 160 MHz channel width to new style as interop
* workaround.
*/
he_6ghz_op->control =
IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
if (chandef->chan->center_freq < chandef->center_freq1)
he_6ghz_op->ccfs0 -= 8;
else
he_6ghz_op->ccfs0 += 8;
fallthrough;
case NL80211_CHAN_WIDTH_80P80:
he_6ghz_op->control =
IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
break;
case NL80211_CHAN_WIDTH_80:
he_6ghz_op->control =
IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
break;
case NL80211_CHAN_WIDTH_40:
he_6ghz_op->control =
IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
break;
default:
he_6ghz_op->control =
IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
break;
}
pos += sizeof(struct ieee80211_he_6ghz_oper);
out:
return pos;
}
bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,