From c8442118ad9cd05cfe3b993f058e70ab25b1009a Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Wed, 24 Oct 2012 10:17:18 +0200 Subject: [PATCH] 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 --- drivers/net/wireless/ath/ath6kl/cfg80211.c | 9 ++++--- .../wireless/brcm80211/brcmfmac/wl_cfg80211.c | 6 +++-- drivers/net/wireless/mwifiex/cfg80211.c | 1 + drivers/net/wireless/rndis_wlan.c | 10 ++++++-- include/net/cfg80211.h | 10 +++++--- include/uapi/linux/nl80211.h | 2 ++ net/mac80211/cfg.c | 5 +++- net/wireless/nl80211.c | 6 ++++- net/wireless/rdev-ops.h | 11 +++++---- net/wireless/trace.h | 24 ++++++++++--------- net/wireless/wext-compat.c | 4 ++-- 11 files changed, 56 insertions(+), 32 deletions(-) diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c index 277089963eb4..d615f9f7506a 100644 --- a/drivers/net/wireless/ath/ath6kl/cfg80211.c +++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c @@ -1384,11 +1384,8 @@ static int ath6kl_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed) 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 @@ static int ath6kl_cfg80211_set_txpower(struct wiphy *wiphy, 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 cb30feaa565b..904c94121c13 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c @@ -1721,7 +1721,7 @@ brcmf_cfg80211_disconnect(struct wiphy *wiphy, struct net_device *ndev, } 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 @@ done: 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 fdb1eb861021..8e829b251d83 100644 --- a/drivers/net/wireless/mwifiex/cfg80211.c +++ b/drivers/net/wireless/mwifiex/cfg80211.c @@ -324,6 +324,7 @@ mwifiex_cfg80211_cancel_remain_on_channel(struct wiphy *wiphy, */ 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 bd1f0cb56085..5390af36c064 100644 --- a/drivers/net/wireless/rndis_wlan.c +++ b/drivers/net/wireless/rndis_wlan.c @@ -490,9 +490,12 @@ static int rndis_scan(struct wiphy *wiphy, 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_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) { @@ -1930,7 +1934,9 @@ static int rndis_set_tx_power(struct wiphy *wiphy, 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 c6964572890f..8034a4268fcb 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1551,7 +1551,10 @@ struct cfg80211_gtk_rekey_data { * 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 @@ struct cfg80211_ops { 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 617d0fbfc96f..4c5f6748ed7d 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -3051,6 +3051,7 @@ enum nl80211_ap_sme_features { * @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 @@ enum nl80211_feature_flags { 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 34fd3eba3090..a352e4d22dd9 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1992,6 +1992,7 @@ static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed) } 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 @@ static int ieee80211_set_tx_power(struct wiphy *wiphy, 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 879ca620fd6f..87d4670ee53a 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -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; } diff --git a/net/wireless/rdev-ops.h b/net/wireless/rdev-ops.h index eb5f8974e148..6e5fa659068d 100644 --- a/net/wireless/rdev-ops.h +++ b/net/wireless/rdev-ops.h @@ -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; } diff --git a/net/wireless/trace.h b/net/wireless/trace.h index 0ca71caf85fb..8e03c6382a8a 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 @@ 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, diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c index 6488d2dbc1d7..742ab6ec4c9d 100644 --- a/net/wireless/wext-compat.c +++ b/net/wireless/wext-compat.c @@ -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; -- 2.20.1