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cfg80211: allow per interface TX power setting

Browse source 
The TX power setting is currently per wiphy (hardware
device) but with multi-channel capabilities that doesn't
make much sense any more.

Allow drivers (and mac80211) to advertise support for
per-interface TX power configuration. When the TX power
is configured for the wiphy, the wdev will be NULL and
the driver can still handle that, but when a wdev is
given the TX power can be set only for that wdev now.

Signed-off-by: Johannes Berg <[email protected]>
This commit is contained in:
Johannes Berg 2012-10-24 10:17:18 +02:00
commit c8442118ad
11 changed files with 56 additions and 32 deletions
Download patch file Download diff file Expand all files Collapse all files

6
net/wireless/nl80211.c
View file

@ -1585,9 +1585,13 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
}
if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
struct wireless_dev *txp_wdev = wdev;
enum nl80211_tx_power_setting type;
int idx, mbm = 0;
if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
txp_wdev = NULL;
if (!rdev->ops->set_tx_power) {
result = -EOPNOTSUPP;
goto bad_res;
@ -1607,7 +1611,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
mbm = nla_get_u32(info->attrs[idx]);
}
result = rdev_set_tx_power(rdev, type, mbm);
result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
if (result)
goto bad_res;
}

11
net/wireless/rdev-ops.h
View file

@ -476,21 +476,22 @@ rdev_set_wiphy_params(struct cfg80211_registered_device *rdev, u32 changed)
}
static inline int rdev_set_tx_power(struct cfg80211_registered_device *rdev,
struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, int mbm)
{
int ret;
trace_rdev_set_tx_power(&rdev->wiphy, type, mbm);
ret = rdev->ops->set_tx_power(&rdev->wiphy, type, mbm);
trace_rdev_set_tx_power(&rdev->wiphy, wdev, type, mbm);
ret = rdev->ops->set_tx_power(&rdev->wiphy, wdev, type, mbm);
trace_rdev_return_int(&rdev->wiphy, ret);
return ret;
}
static inline int rdev_get_tx_power(struct cfg80211_registered_device *rdev,
int *dbm)
struct wireless_dev *wdev, int *dbm)
{
int ret;
trace_rdev_get_tx_power(&rdev->wiphy);
ret = rdev->ops->get_tx_power(&rdev->wiphy, dbm);
trace_rdev_get_tx_power(&rdev->wiphy, wdev);
ret = rdev->ops->get_tx_power(&rdev->wiphy, wdev, dbm);
trace_rdev_return_int_int(&rdev->wiphy, ret, *dbm);
return ret;
}

24
net/wireless/trace.h
View file

@ -26,7 +26,7 @@
#define WIPHY_PR_ARG MAC_PR_ARG(wiphy_mac)
#define WDEV_ENTRY __field(u32, id)
#define WDEV_ASSIGN (__entry->id) = (wdev->identifier)
#define WDEV_ASSIGN (__entry->id) = (wdev ? wdev->identifier : 0)
#define WDEV_PR_FMT ", wdev id: %u"
#define WDEV_PR_ARG (__entry->id)
@ -260,11 +260,6 @@ DEFINE_EVENT(wiphy_only_evt, rdev_get_antenna,
TP_ARGS(wiphy)
);
DEFINE_EVENT(wiphy_only_evt, rdev_get_tx_power,
TP_PROTO(struct wiphy *wiphy),
TP_ARGS(wiphy)
);
DEFINE_EVENT(wiphy_only_evt, rdev_rfkill_poll,
TP_PROTO(struct wiphy *wiphy),
TP_ARGS(wiphy)
@ -1230,22 +1225,29 @@ TRACE_EVENT(rdev_set_wiphy_params,
WIPHY_PR_ARG, __entry->changed)
);
DEFINE_EVENT(wiphy_wdev_evt, rdev_get_tx_power,
TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev),
TP_ARGS(wiphy, wdev)
);
TRACE_EVENT(rdev_set_tx_power,
TP_PROTO(struct wiphy *wiphy, enum nl80211_tx_power_setting type,
int mbm),
TP_ARGS(wiphy, type, mbm),
TP_PROTO(struct wiphy *wiphy, struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, int mbm),
TP_ARGS(wiphy, wdev, type, mbm),
TP_STRUCT__entry(
WIPHY_ENTRY
WDEV_ENTRY
__field(enum nl80211_tx_power_setting, type)
__field(int, mbm)
),
TP_fast_assign(
WIPHY_ASSIGN;
WDEV_ASSIGN;
__entry->type = type;
__entry->mbm = mbm;
),
TP_printk(WIPHY_PR_FMT ", type: %d, mbm: %d",
WIPHY_PR_ARG, __entry->type, __entry->mbm)
TP_printk(WIPHY_PR_FMT WDEV_PR_FMT ", type: %d, mbm: %d",
WIPHY_PR_ARG, WDEV_PR_ARG,__entry->type, __entry->mbm)
);
TRACE_EVENT(rdev_return_int_int,

4
net/wireless/wext-compat.c
View file

@ -895,7 +895,7 @@ static int cfg80211_wext_siwtxpower(struct net_device *dev,
return 0;
}
return rdev_set_tx_power(rdev, type, DBM_TO_MBM(dbm));
return rdev_set_tx_power(rdev, wdev, type, DBM_TO_MBM(dbm));
}
static int cfg80211_wext_giwtxpower(struct net_device *dev,
@ -914,7 +914,7 @@ static int cfg80211_wext_giwtxpower(struct net_device *dev,
if (!rdev->ops->get_tx_power)
return -EOPNOTSUPP;
err = rdev_get_tx_power(rdev, &val);
err = rdev_get_tx_power(rdev, wdev, &val);
if (err)
return err;