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cfg80211: enable dynack through nl80211

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Enable ACK timeout estimation algorithm (dynack) using mac80211
set_coverage_class API. Dynack is activated passing coverage class equals to -1
to lower drivers and it is automatically disabled setting valid value for
coverage class.
Define NL80211_ATTR_WIPHY_DYN_ACK flag attribute to enable dynack from
userspace. In order to activate dynack NL80211_FEATURE_ACKTO_ESTIMATION feature
flag must be set by lower drivers to indicate dynack capability.

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Lorenzo Bianconi 2014-09-04 23:57:40 +02:00 committed by Johannes Berg
parent eaa336b0f5
commit 3057dbfdab
3 changed files with 25 additions and 0 deletions
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2
include/net/cfg80211.h
View File

@ -1805,6 +1805,7 @@ struct cfg80211_connect_params {
* @WIPHY_PARAM_FRAG_THRESHOLD: wiphy->frag_threshold has changed
* @WIPHY_PARAM_RTS_THRESHOLD: wiphy->rts_threshold has changed
* @WIPHY_PARAM_COVERAGE_CLASS: coverage class changed
* @WIPHY_PARAM_DYN_ACK: dynack has been enabled
*/
enum wiphy_params_flags {
WIPHY_PARAM_RETRY_SHORT = 1 << 0,
@ -1812,6 +1813,7 @@ enum wiphy_params_flags {
WIPHY_PARAM_FRAG_THRESHOLD = 1 << 2,
WIPHY_PARAM_RTS_THRESHOLD = 1 << 3,
WIPHY_PARAM_COVERAGE_CLASS = 1 << 4,
WIPHY_PARAM_DYN_ACK = 1 << 5,
};
/*

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

@ -1605,6 +1605,12 @@ enum nl80211_commands {
* association request. In addition, it must also set the RRM capability
* flag in the association request's Capability Info field.
*
* @NL80211_ATTR_WIPHY_DYN_ACK: flag attribute used to enable ACK timeout
* estimation algorithm (dynack). In order to activate dynack
* %NL80211_FEATURE_ACKTO_ESTIMATION feature flag must be set by lower
* drivers to indicate dynack capability. Dynack is automatically disabled
* setting valid value for coverage class.
*
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
@ -1949,6 +1955,8 @@ enum nl80211_attrs {
NL80211_ATTR_USE_RRM,
NL80211_ATTR_WIPHY_DYN_ACK,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
@ -3991,6 +3999,9 @@ enum nl80211_ap_sme_features {
* current tx power value into the TPC Report IE in the spectrum
* management TPC Report action frame, and in the Radio Measurement Link
* Measurement Report action frame.
* @NL80211_FEATURE_ACKTO_ESTIMATION: This driver supports dynamic ACK timeout
* estimation (dynack). %NL80211_ATTR_WIPHY_DYN_ACK flag attribute is used
* to enable dynack.
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
@ -4016,6 +4027,7 @@ enum nl80211_feature_flags {
NL80211_FEATURE_WFA_TPC_IE_IN_PROBES = 1 << 20,
NL80211_FEATURE_QUIET = 1 << 21,
NL80211_FEATURE_TX_POWER_INSERTION = 1 << 22,
NL80211_FEATURE_ACKTO_ESTIMATION = 1 << 23,
};
/**

11
net/wireless/nl80211.c
View File

@ -226,6 +226,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
[NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
[NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
[NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },
[NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
@ -2239,11 +2240,21 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
}
if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK])
return -EINVAL;
coverage_class = nla_get_u8(
info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
changed |= WIPHY_PARAM_COVERAGE_CLASS;
}
if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION))
return -EOPNOTSUPP;
changed |= WIPHY_PARAM_DYN_ACK;
}
if (changed) {
u8 old_retry_short, old_retry_long;
u32 old_frag_threshold, old_rts_threshold;