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nl80211: add VHT support for set_bitrate_mask

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Add VHT MCS/NSS set support for nl80211_set_tx_bitrate_mask().
This should be used mainly for test purpose, to check
different MCS/NSS VHT combinations.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Janusz Dziedzic 2013-12-05 20:42:58 +01:00 committed by Johannes Berg
parent 31f1f4ec51
commit 204e35a91c
3 changed files with 99 additions and 6 deletions
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1
include/net/cfg80211.h
View File

@ -1767,6 +1767,7 @@ struct cfg80211_bitrate_mask {
struct {
u32 legacy;
u8 ht_mcs[IEEE80211_HT_MCS_MASK_LEN];
u16 vht_mcs[NL80211_VHT_NSS_MAX];
} control[IEEE80211_NUM_BANDS];
};
/**

12
include/uapi/linux/nl80211.h
View File

@ -3112,6 +3112,8 @@ enum nl80211_key_attributes {
* %NL80211_MAX_SUPP_RATES in a single array).
* @NL80211_TXRATE_HT: HT (MCS) rates allowed for TX rate selection
* in an array of MCS numbers.
* @NL80211_TXRATE_VHT: VHT rates allowed for TX rate selection,
* see &struct nl80211_txrate_vht
* @__NL80211_TXRATE_AFTER_LAST: internal
* @NL80211_TXRATE_MAX: highest TX rate attribute
*/
@ -3119,6 +3121,7 @@ enum nl80211_tx_rate_attributes {
__NL80211_TXRATE_INVALID,
NL80211_TXRATE_LEGACY,
NL80211_TXRATE_HT,
NL80211_TXRATE_VHT,
/* keep last */
__NL80211_TXRATE_AFTER_LAST,
@ -3126,6 +3129,15 @@ enum nl80211_tx_rate_attributes {
};
#define NL80211_TXRATE_MCS NL80211_TXRATE_HT
#define NL80211_VHT_NSS_MAX 8
/**
* struct nl80211_txrate_vht - VHT MCS/NSS txrate bitmap
* @mcs: MCS bitmap table for each NSS (array index 0 for 1 stream, etc.)
*/
struct nl80211_txrate_vht {
__u16 mcs[NL80211_VHT_NSS_MAX];
};
/**
* enum nl80211_band - Frequency band

92
net/wireless/nl80211.c
View File

@ -7328,11 +7328,72 @@ static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
return true;
}
static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
{
u16 mcs_mask = 0;
switch (vht_mcs_map) {
case IEEE80211_VHT_MCS_NOT_SUPPORTED:
break;
case IEEE80211_VHT_MCS_SUPPORT_0_7:
mcs_mask = 0x00FF;
break;
case IEEE80211_VHT_MCS_SUPPORT_0_8:
mcs_mask = 0x01FF;
break;
case IEEE80211_VHT_MCS_SUPPORT_0_9:
mcs_mask = 0x03FF;
break;
default:
break;
}
return mcs_mask;
}
static void vht_build_mcs_mask(u16 vht_mcs_map,
u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
{
u8 nss;
for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
vht_mcs_map >>= 2;
}
}
static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
struct nl80211_txrate_vht *txrate,
u16 mcs[NL80211_VHT_NSS_MAX])
{
u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
u8 i;
if (!sband->vht_cap.vht_supported)
return false;
memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);
/* Build vht_mcs_mask from VHT capabilities */
vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);
for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
mcs[i] = txrate->mcs[i];
else
return false;
}
return true;
}
static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
[NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_RATES },
[NL80211_TXRATE_HT] = { .type = NLA_BINARY,
.len = NL80211_MAX_SUPP_HT_RATES },
[NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
};
static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
@ -7345,6 +7406,7 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
struct net_device *dev = info->user_ptr[1];
struct nlattr *tx_rates;
struct ieee80211_supported_band *sband;
u16 vht_tx_mcs_map;
if (!rdev->ops->set_bitrate_mask)
return -EOPNOTSUPP;
@ -7361,6 +7423,12 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
memcpy(mask.control[i].ht_mcs,
sband->ht_cap.mcs.rx_mask,
sizeof(mask.control[i].ht_mcs));
if (!sband->vht_cap.vht_supported)
continue;
vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
vht_build_mcs_mask(vht_tx_mcs_map, mask.control[i].vht_mcs);
}
/* if no rates are given set it back to the defaults */
@ -7399,20 +7467,32 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
mask.control[band].ht_mcs))
return -EINVAL;
}
if (tb[NL80211_TXRATE_VHT]) {
if (!vht_set_mcs_mask(
sband,
nla_data(tb[NL80211_TXRATE_VHT]),
mask.control[band].vht_mcs))
return -EINVAL;
}
if (mask.control[band].legacy == 0) {
/* don't allow empty legacy rates if HT
* is not even supported. */
if (!rdev->wiphy.bands[band]->ht_cap.ht_supported)
/* don't allow empty legacy rates if HT or VHT
* are not even supported.
*/
if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
rdev->wiphy.bands[band]->vht_cap.vht_supported))
return -EINVAL;
for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
if (mask.control[band].ht_mcs[i])
break;
goto out;
for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
if (mask.control[band].vht_mcs[i])
goto out;
/* legacy and mcs rates may not be both empty */
if (i == IEEE80211_HT_MCS_MASK_LEN)
return -EINVAL;
return -EINVAL;
}
}