cfg80211: allow per interface TX power setting
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 <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 2770899..d615f9f 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -1384,11 +1384,8 @@
return 0;
}
-/*
- * The type nl80211_tx_power_setting replaces the following
- * data type from 2.6.36 onwards
-*/
static int ath6kl_cfg80211_set_txpower(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
enum nl80211_tx_power_setting type,
int mbm)
{
@@ -1423,7 +1420,9 @@
return 0;
}
-static int ath6kl_cfg80211_get_txpower(struct wiphy *wiphy, int *dbm)
+static int ath6kl_cfg80211_get_txpower(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ int *dbm)
{
struct ath6kl *ar = (struct ath6kl *)wiphy_priv(wiphy);
struct ath6kl_vif *vif;
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
index cb30fea..904c941 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
@@ -1721,7 +1721,7 @@
}
static s32
-brcmf_cfg80211_set_tx_power(struct wiphy *wiphy,
+brcmf_cfg80211_set_tx_power(struct wiphy *wiphy, struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, s32 mbm)
{
@@ -1770,7 +1770,9 @@
return err;
}
-static s32 brcmf_cfg80211_get_tx_power(struct wiphy *wiphy, s32 *dbm)
+static s32 brcmf_cfg80211_get_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ s32 *dbm)
{
struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
struct brcmf_if *ifp = netdev_priv(cfg_to_ndev(cfg));
diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index fdb1eb8..8e829b2 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -324,6 +324,7 @@
*/
static int
mwifiex_cfg80211_set_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
enum nl80211_tx_power_setting type,
int mbm)
{
diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c
index bd1f0cb..5390af3 100644
--- a/drivers/net/wireless/rndis_wlan.c
+++ b/drivers/net/wireless/rndis_wlan.c
@@ -490,9 +490,12 @@
static int rndis_set_wiphy_params(struct wiphy *wiphy, u32 changed);
static int rndis_set_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
enum nl80211_tx_power_setting type,
int mbm);
-static int rndis_get_tx_power(struct wiphy *wiphy, int *dbm);
+static int rndis_get_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ int *dbm);
static int rndis_connect(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_connect_params *sme);
@@ -1903,6 +1906,7 @@
}
static int rndis_set_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
enum nl80211_tx_power_setting type,
int mbm)
{
@@ -1930,7 +1934,9 @@
return -ENOTSUPP;
}
-static int rndis_get_tx_power(struct wiphy *wiphy, int *dbm)
+static int rndis_get_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ int *dbm)
{
struct rndis_wlan_private *priv = wiphy_priv(wiphy);
struct usbnet *usbdev = priv->usbdev;
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index c696457..8034a42 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1551,7 +1551,10 @@
* struct wiphy. If returning an error, no value should be changed.
*
* @set_tx_power: set the transmit power according to the parameters,
- * the power passed is in mBm, to get dBm use MBM_TO_DBM().
+ * the power passed is in mBm, to get dBm use MBM_TO_DBM(). The
+ * wdev may be %NULL if power was set for the wiphy, and will
+ * always be %NULL unless the driver supports per-vif TX power
+ * (as advertised by the nl80211 feature flag.)
* @get_tx_power: store the current TX power into the dbm variable;
* return 0 if successful
*
@@ -1748,9 +1751,10 @@
int (*set_wiphy_params)(struct wiphy *wiphy, u32 changed);
- int (*set_tx_power)(struct wiphy *wiphy,
+ int (*set_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, int mbm);
- int (*get_tx_power)(struct wiphy *wiphy, int *dbm);
+ int (*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
+ int *dbm);
int (*set_wds_peer)(struct wiphy *wiphy, struct net_device *dev,
const u8 *addr);
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 617d0fb..4c5f674 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -3051,6 +3051,7 @@
* @NL80211_FEATURE_LOW_PRIORITY_SCAN: This driver supports low priority scan
* @NL80211_FEATURE_SCAN_FLUSH: Scan flush is supported
* @NL80211_FEATURE_AP_SCAN: Support scanning using an AP vif
+ * @NL80211_FEATURE_VIF_TXPOWER: The driver supports per-vif TX power setting
*/
enum nl80211_feature_flags {
NL80211_FEATURE_SK_TX_STATUS = 1 << 0,
@@ -3062,6 +3063,7 @@
NL80211_FEATURE_LOW_PRIORITY_SCAN = 1 << 6,
NL80211_FEATURE_SCAN_FLUSH = 1 << 7,
NL80211_FEATURE_AP_SCAN = 1 << 8,
+ NL80211_FEATURE_VIF_TXPOWER = 1 << 9,
};
/**
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 34fd3eb..a352e4d 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -1992,6 +1992,7 @@
}
static int ieee80211_set_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
enum nl80211_tx_power_setting type, int mbm)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
@@ -2026,7 +2027,9 @@
return 0;
}
-static int ieee80211_get_tx_power(struct wiphy *wiphy, int *dbm)
+static int ieee80211_get_tx_power(struct wiphy *wiphy,
+ struct wireless_dev *wdev,
+ int *dbm)
{
struct ieee80211_local *local = wiphy_priv(wiphy);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 879ca62..87d4670 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1585,9 +1585,13 @@
}
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 @@
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;
}
diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h
index eb5f897..6e5fa65 100644
--- a/net/wireless/rdev-ops.h
+++ b/net/wireless/rdev-ops.h
@@ -476,21 +476,22 @@
}
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;
}
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 0ca71ca..8e03c63 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -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 @@
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 @@
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,
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 6488d2d..742ab6e 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -895,7 +895,7 @@
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 @@
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;
