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Thu, 17 Jan 2019 11:22:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547724180; bh=40bjy7KePq/+yi8rumoloWk2emEzyX5kUMKxteTE6wM=; h=From:To:Cc:Subject:Date:From; b=g1skfe7734XzzF5Qp5VeE/dlSNiS3JHt+FaehVB9d3VjgKNTRRjhNk2Q3gXS9NHic hG19na79Bk7m0bfuF9VjMcmz8nGAPvGHW1Zfx3Meh4V4o7NuJouHiU1Q/jUniFYh3H P7pbHtIEfjwGag9iVRx/WJ9m5heTUFuw0aTq8sto= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org F3DD6601D3 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=bpothuno@codeaurora.org From: Balaji Pothunoori To: johannes@sipsolutions.net, ath10k@lists.infradead.org Subject: [PATCH 1/3] cfg80211: Add support to set tx power for a station associated Date: Thu, 17 Jan 2019 16:52:47 +0530 Message-Id: <1547724167-11420-1-git-send-email-bpothuno@codeaurora.org> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190117_032302_166201_7A63B99B X-CRM114-Status: GOOD ( 18.11 ) X-BeenThere: ath10k@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Balaji Pothunoori , Ashok Raj Nagarajan , linux-wireless@vger.kernel.org MIME-Version: 1.0 Sender: "ath10k" Errors-To: ath10k-bounces+patchwork-ath10k=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ashok Raj Nagarajan This patch adds support to set transmit power setting type and transmit power level attributes to NL80211_CMD_SET_STATION in order to facilitate adjusting the transmit power level of a station associated to the AP. The added attributes allow selection of automatic and limited transmit power level, with the level defined in mBm format. Co-developed-by: Balaji Pothunoori Signed-off-by: Ashok Raj Nagarajan Signed-off-by: Balaji Pothunoori --- include/net/cfg80211.h | 12 ++++++++++++ include/uapi/linux/nl80211.h | 14 ++++++++++++++ net/wireless/nl80211.c | 35 +++++++++++++++++++++++++++++++++++ 3 files changed, 61 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index ede7fcd..592f564 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -958,6 +958,7 @@ enum station_parameters_apply_mask { STATION_PARAM_APPLY_UAPSD = BIT(0), STATION_PARAM_APPLY_CAPABILITY = BIT(1), STATION_PARAM_APPLY_PLINK_STATE = BIT(2), + STATION_PARAM_APPLY_STA_TXPOWER = BIT(3), }; /** @@ -1001,6 +1002,15 @@ enum station_parameters_apply_mask { * @support_p2p_ps: information if station supports P2P PS mechanism * @he_capa: HE capabilities of station * @he_capa_len: the length of the HE capabilities + * @txpwr: tx power (in mBm) to be used for sending data traffic. If tx power + * is not provided, the default per-interface tx power setting will be + * overriding. Driver should be picking up the lowest tx power, either tx + * power per-interface or per-station. + * @type: In particular if TPC %type is NL80211_TX_POWER_LIMITED then txpwr will + * be less than or equal to specified from userspace, whereas if TPC %type + * is NL80211_TX_POWER_AUTOMATIC then it indicates default txpwr. + * NL80211_TX_POWER_FIXED is not a valid configuration option for + * per peer TPC. */ struct station_parameters { const u8 *supported_rates; @@ -1030,6 +1040,8 @@ struct station_parameters { int support_p2p_ps; const struct ieee80211_he_cap_elem *he_capa; u8 he_capa_len; + s16 txpwr; + enum nl80211_tx_power_setting type; }; /** diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index 2b53c0e..09c9e14 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -2292,6 +2292,15 @@ enum nl80211_commands { * This is also used for capability advertisement in the wiphy information, * with the appropriate sub-attributes. * + * @NL80211_ATTR_STA_TX_POWER_SETTING: Transmit power setting type (u8) for + * station associated with the AP. See &enum nl80211_tx_power_setting for + * possible values. + * @NL80211_ATTR_STA_TX_POWER: Transmit power level (s16) in mBm units. This + * allows to set Tx power for a station. If this attribute is not included, + * the default per-interface tx power setting will be overriding. Driver + * should be picking up the lowest tx power, either tx power per-interface + * or per-station. + * * @NUM_NL80211_ATTR: total number of nl80211_attrs available * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use @@ -2740,6 +2749,8 @@ enum nl80211_attrs { NL80211_ATTR_TIMEOUT, NL80211_ATTR_PEER_MEASUREMENTS, + NL80211_ATTR_STA_TX_POWER_SETTING, + NL80211_ATTR_STA_TX_POWER, /* add attributes here, update the policy in nl80211.c */ @@ -5308,6 +5319,8 @@ enum nl80211_feature_flags { * able to rekey an in-use key correctly. Userspace must not rekey PTK keys * if this flag is not set. Ignoring this can leak clear text packets and/or * freeze the connection. + * @NL80211_EXT_FEATURE_STA_TX_PWR: This driver supports controlling tx power + * to a station. * * @NUM_NL80211_EXT_FEATURES: number of extended features. * @MAX_NL80211_EXT_FEATURES: highest extended feature index. @@ -5348,6 +5361,7 @@ enum nl80211_ext_feature_index { NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT, NL80211_EXT_FEATURE_CAN_REPLACE_PTK0, NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER, + NL80211_EXT_FEATURE_STA_TX_PWR, /* add new features before the definition below */ NUM_NL80211_EXT_FEATURES, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index e20329b..753ab51 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -347,6 +347,8 @@ const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { .len = NL80211_MAX_SUPP_RATES }, [NL80211_ATTR_STA_PLINK_ACTION] = NLA_POLICY_MAX(NLA_U8, NUM_NL80211_PLINK_ACTIONS - 1), + [NL80211_ATTR_STA_TX_POWER_SETTING] = { .type = NLA_U8 }, + [NL80211_ATTR_STA_TX_POWER] = { .type = NLA_S16 }, [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 }, [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ }, [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, @@ -5377,6 +5379,31 @@ static int nl80211_set_station_tdls(struct genl_info *info, return nl80211_parse_sta_wme(info, params); } +static int nl80211_parse_sta_txpower_setting(struct genl_info *info, + struct station_parameters *params) +{ + struct cfg80211_registered_device *rdev = info->user_ptr[0]; + int idx; + + if (info->attrs[NL80211_ATTR_STA_TX_POWER_SETTING]) { + if (!rdev->ops->set_tx_power || + !wiphy_ext_feature_isset(&rdev->wiphy, + NL80211_EXT_FEATURE_STA_TX_PWR)) + return -EOPNOTSUPP; + + idx = NL80211_ATTR_STA_TX_POWER_SETTING; + params->type = nla_get_u32(info->attrs[idx]); + + if (params->type == NL80211_TX_POWER_LIMITED) { + idx = NL80211_ATTR_STA_TX_POWER; + params->txpwr = nla_get_u32(info->attrs[idx]); + } + params->sta_modify_mask |= STATION_PARAM_APPLY_STA_TXPOWER; + } + + return 0; +} + static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) { struct cfg80211_registered_device *rdev = info->user_ptr[0]; @@ -5461,6 +5488,10 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]); } + err = nl80211_parse_sta_txpower_setting(info, ¶ms); + if (err) + return err; + /* Include parameters for TDLS peer (will check later) */ err = nl80211_set_station_tdls(info, ¶ms); if (err) @@ -5589,6 +5620,10 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) params.plink_action = nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]); + err = nl80211_parse_sta_txpower_setting(info, ¶ms); + if (err) + return err; + err = nl80211_parse_sta_channel_info(info, ¶ms); if (err) return err;