This patch adds support for NoAck per WMM Queue. The Unicast QoS
Header is adapted accordingly for each outgoing frame.
The support is turned on and off through nl80211 by extending
the WMM TX Queue Parameters, but can be triggered separately.
I have tested this feature on ath9k as well as ath5k devices. There is
an iw patch as well to make use of this feature.
It should apply well on the latest wireless-testing kernel.
Signed-off-by: Simon Wunderlich <siwu@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@xxxxxxxxxxxxxxxxxxx>
---
include/linux/nl80211.h | 2 ++
include/net/cfg80211.h | 7 +++++++
include/net/mac80211.h | 2 ++
net/mac80211/cfg.c | 21 +++++++++++++++++++++
net/mac80211/tx.c | 5 +++++
net/mac80211/util.c | 1 +
net/mac80211/wme.c | 5 ++++-
net/wireless/nl80211.c | 34 +++++++++++++++++++++++++++++-----
8 files changed, 71 insertions(+), 6 deletions(-)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index f9261c2..6b0ecb4 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -2137,6 +2137,7 @@ enum nl80211_mesh_setup_params {
* @NL80211_TXQ_ATTR_CWMAX: Maximum contention window [a value of the form
* 2^n-1 in the range 1..32767]
* @NL80211_TXQ_ATTR_AIFS: Arbitration interframe space [0..255]
+ * @NL80211_TXQ_ATTR_NOACK: NoAck Mode, 0 meaning normal Ack operation
* @__NL80211_TXQ_ATTR_AFTER_LAST: Internal
* @NL80211_TXQ_ATTR_MAX: Maximum TXQ attribute number
*/
@@ -2147,6 +2148,7 @@ enum nl80211_txq_attr {
NL80211_TXQ_ATTR_CWMIN,
NL80211_TXQ_ATTR_CWMAX,
NL80211_TXQ_ATTR_AIFS,
+ NL80211_TXQ_ATTR_NOACK,
/* keep last */
__NL80211_TXQ_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 8d7ba09..10884ef 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -825,6 +825,7 @@ struct mesh_setup {
* @cwmax: Maximum contention window [a value of the form 2^n-1 in the range
* 1..32767]
* @aifs: Arbitration interframe space [0..255]
+ * @noack: NoAck Policy, false meaning normal Ack operation
*/
struct ieee80211_txq_params {
enum nl80211_txq_q queue;
@@ -832,6 +833,7 @@ struct ieee80211_txq_params {
u16 cwmin;
u16 cwmax;
u8 aifs;
+ bool noack;
};
/* from net/wireless.h */
@@ -1341,6 +1343,8 @@ struct cfg80211_gtk_rekey_data {
*
* @set_txq_params: Set TX queue parameters
*
+ * @set_txq_noack: Set TX queue NoAck Parameter
+ *
* @set_channel: Set channel for a given wireless interface. Some devices
* may support multi-channel operation (by channel hopping) so cfg80211
* doesn't verify much. Note, however, that the passed netdev may be
@@ -1521,6 +1525,9 @@ struct cfg80211_ops {
int (*set_txq_params)(struct wiphy *wiphy, struct net_device *dev,
struct ieee80211_txq_params *params);
+ int (*set_txq_noack)(struct wiphy *wiphy, struct net_device *dev,
+ struct ieee80211_txq_params *params);
+
int (*set_channel)(struct wiphy *wiphy, struct net_device *dev,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type);
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 0756049..1bfcc21 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -122,6 +122,7 @@ enum ieee80211_ac_numbers {
* 2^n-1 in the range 1..32767]
* @cw_max: maximum contention window [like @cw_min]
* @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
+ * @noack: NoAck Policy, false meaning normal Ack operation
* @uapsd: is U-APSD mode enabled for the queue
*/
struct ieee80211_tx_queue_params {
@@ -129,6 +130,7 @@ struct ieee80211_tx_queue_params {
u16 cw_min;
u16 cw_max;
u8 aifs;
+ bool noack;
bool uapsd;
};
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 1063a7e..8298c51 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1393,6 +1393,7 @@ static int ieee80211_set_txq_params(struct wiphy *wiphy,
p.cw_max = params->cwmax;
p.cw_min = params->cwmin;
p.txop = params->txop;
+ p.noack = params->noack;
/*
* Setting tx queue params disables u-apsd because it's only
@@ -1414,6 +1415,25 @@ static int ieee80211_set_txq_params(struct wiphy *wiphy,
return 0;
}
+static int ieee80211_set_txq_noack(struct wiphy *wiphy,
+ struct net_device *dev,
+ struct ieee80211_txq_params *params)
+{
+ struct ieee80211_local *local = wiphy_priv(wiphy);
+ struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+ if (!local->ops->conf_tx)
+ return -EOPNOTSUPP;
+
+ if (params->queue >= local->hw.queues)
+ return -EINVAL;
+
+ sdata->tx_conf[params->queue].noack = params->noack;
+
+ return 0;
+
+}
+
static int ieee80211_set_channel(struct wiphy *wiphy,
struct net_device *netdev,
struct ieee80211_channel *chan,
@@ -2662,6 +2682,7 @@ struct cfg80211_ops mac80211_config_ops = {
#endif
.change_bss = ieee80211_change_bss,
.set_txq_params = ieee80211_set_txq_params,
+ .set_txq_noack = ieee80211_set_txq_noack,
.set_channel = ieee80211_set_channel,
.suspend = ieee80211_suspend,
.resume = ieee80211_resume,
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index f044963..cb13ab3 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1161,6 +1161,11 @@ ieee80211_tx_prepare(struct ieee80211_sub_if_data *sdata,
* explicitly unset IEEE80211_TX_CTL_NO_ACK since
* it might already be set for injected frames.
*/
+
+ qc = ieee80211_get_qos_ctl(hdr);
+ if (*qc & IEEE80211_QOS_CTL_ACK_POLICY_NOACK)
+ info->flags |= IEEE80211_TX_CTL_NO_ACK;
+
}
if (!(info->flags & IEEE80211_TX_CTL_DONTFRAG)) {
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 3a00814..d298baf 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -629,6 +629,7 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata)
}
qparam.uapsd = false;
+ qparam.noack = false;
sdata->tx_conf[queue] = qparam;
drv_conf_tx(local, sdata, queue, &qparam);
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 4332711..ba22a08 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -143,13 +143,16 @@ void ieee80211_set_qos_hdr(struct ieee80211_sub_if_data *sdata,
/* Fill in the QoS header if there is one. */
if (ieee80211_is_data_qos(hdr->frame_control)) {
u8 *p = ieee80211_get_qos_ctl(hdr);
- u8 ack_policy, tid;
+ u8 ack_policy = 0, tid, q;
tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
+ q = ieee802_1d_to_ac[tid];
/* preserve EOSP bit */
ack_policy = *p & IEEE80211_QOS_CTL_EOSP;
+ if (sdata->tx_conf[q].noack)
+ ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
if (unlikely(sdata->local->wifi_wme_noack_test) ||
is_multicast_ether_addr(hdr->addr1))
ack_policy |= IEEE80211_QOS_CTL_ACK_POLICY_NOACK;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 6bc7c4b..1e8e2c0 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1081,6 +1081,7 @@ static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
[NL80211_TXQ_ATTR_CWMIN] = { .type = NLA_U16 },
[NL80211_TXQ_ATTR_CWMAX] = { .type = NLA_U16 },
[NL80211_TXQ_ATTR_AIFS] = { .type = NLA_U8 },
+ [NL80211_TXQ_ATTR_NOACK] = { .type = NLA_U8 },
};
static int parse_txq_params(struct nlattr *tb[],
@@ -1096,10 +1097,24 @@ static int parse_txq_params(struct nlattr *tb[],
txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);
+ txq_params->noack = false;
return 0;
}
+static int parse_txq_params_noack(struct nlattr *tb[],
+ struct ieee80211_txq_params *txq_params)
+{
+ if (!tb[NL80211_TXQ_ATTR_NOACK] || !tb[NL80211_TXQ_ATTR_QUEUE])
+ return -EINVAL;
+
+ txq_params->queue = nla_get_u8(tb[NL80211_TXQ_ATTR_QUEUE]);
+ txq_params->noack = !!nla_get_u8(tb[NL80211_TXQ_ATTR_NOACK]);
+
+ return 0;
+}
+
+
static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
{
/*
@@ -1279,17 +1294,26 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
nla_for_each_nested(nl_txq_params,
info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
rem_txq_params) {
+ int result_noack, result_param;
nla_parse(tb, NL80211_TXQ_ATTR_MAX,
nla_data(nl_txq_params),
nla_len(nl_txq_params),
txq_params_policy);
- result = parse_txq_params(tb, &txq_params);
- if (result)
+
+ result_param = parse_txq_params(tb, &txq_params);
+ result_noack = parse_txq_params_noack(tb, &txq_params);
+
+ if (!result_param)
+ result = rdev->ops->set_txq_params(&rdev->wiphy,
+ netdev,
+ &txq_params);
+ else if (!result_noack)
+ result = rdev->ops->set_txq_noack(&rdev->wiphy,
+ netdev,
+ &txq_params);
+ else
goto bad_res;
- result = rdev->ops->set_txq_params(&rdev->wiphy,
- netdev,
- &txq_params);
if (result)
goto bad_res;
}
--
1.7.7.2
--
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