Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:38924 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750838Ab1KHQqJ (ORCPT ); Tue, 8 Nov 2011 11:46:09 -0500 Received: by wwi36 with SMTP id 36so1043384wwi.1 for ; Tue, 08 Nov 2011 08:46:08 -0800 (PST) From: Arik Nemtsov To: Cc: Johannes Berg , Arik Nemtsov Subject: [PATCH v4 1/3] nl80211: Add probe response offload attribute Date: Tue, 8 Nov 2011 18:45:59 +0200 Message-Id: <1320770761-23268-1-git-send-email-arik@wizery.com> (sfid-20111108_174613_638639_0D27B516) Sender: linux-wireless-owner@vger.kernel.org List-ID: Notify user-space about probe-response offloading support in the driver. A wiphy flag is used to indicate support and a bitmap of protocols determines which protocols are supported. Signed-off-by: Guy Eilam Signed-off-by: Arik Nemtsov --- v3->4: - Add missing documentation - Make comments more explicit about probe-resp offloading being always in-effect for supporting devices. include/linux/nl80211.h | 28 ++++++++++++++++++++++++++++ include/net/cfg80211.h | 10 ++++++++++ net/wireless/nl80211.c | 5 +++++ 3 files changed, 43 insertions(+), 0 deletions(-) diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index 8049bf7..e468d0b 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -1109,6 +1109,11 @@ enum nl80211_commands { * %NL80211_CMD_TDLS_MGMT. Otherwise %NL80211_CMD_TDLS_OPER should be * used for asking the driver to perform a TDLS operation. * + * @NL80211_ATTR_PROBE_RESP_OFFLOAD: Indicates that the HW responds to probe + * requests while operating in AP-mode. + * This attribute holds a bitmap of the supported protocols for + * offloading (see &enum nl80211_probe_resp_offload_support_attr). + * * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use */ @@ -1337,6 +1342,8 @@ enum nl80211_attrs { NL80211_ATTR_TDLS_SUPPORT, NL80211_ATTR_TDLS_EXTERNAL_SETUP, + NL80211_ATTR_PROBE_RESP_OFFLOAD_SUPPORT, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -2650,4 +2657,25 @@ enum nl80211_tdls_operation { NL80211_TDLS_DISABLE_LINK, }; +/** + * enum nl80211_probe_resp_offload_support_attr - optional supported + * protocols for probe-response offloading by the driver/FW. + * To be used with the %NL80211_ATTR_PROBE_RESP_OFFLOAD attribute. + * Each enum value represents a bit in the bitmap of supported + * protocols. Typically a subset of probe-requests belonging to a + * supported protocol will be excluded from offload and uploaded + * to the host. + * + * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS: Support for WPS ver. 1 + * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2: Support for WPS ver. 2 + * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P: Support for P2P + * @NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U: Support for 802.11u + */ +enum nl80211_probe_resp_offload_support_attr { + NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS = 1<<0, + NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2 = 1<<1, + NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P = 1<<2, + NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U = 1<<3, +}; + #endif /* __LINUX_NL80211_H */ diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 92cf1c2..9e8aa88 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1675,6 +1675,8 @@ struct cfg80211_ops { * teardown packets should be sent through the @NL80211_CMD_TDLS_MGMT * command. When this flag is not set, @NL80211_CMD_TDLS_OPER should be * used for asking the driver/firmware to perform a TDLS operation. + * @WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD: When operating as an AP, the device + * responds to probe-requests in hardware. */ enum wiphy_flags { WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0), @@ -1693,6 +1695,7 @@ enum wiphy_flags { WIPHY_FLAG_AP_UAPSD = BIT(14), WIPHY_FLAG_SUPPORTS_TDLS = BIT(15), WIPHY_FLAG_TDLS_EXTERNAL_SETUP = BIT(16), + WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD = BIT(17), }; /** @@ -1956,6 +1959,13 @@ struct wiphy { u32 available_antennas_tx; u32 available_antennas_rx; + /* + * Bitmap of supported protocols for probe response offloading + * see &enum nl80211_probe_resp_offload_support_attr. Only valid + * when the wiphy flag @WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD is set. + */ + u32 probe_resp_offload; + /* If multiple wiphys are registered and you're handed e.g. * a regular netdev with assigned ieee80211_ptr, you won't * know whether it points to a wiphy your driver has registered diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index b3a476f..62acdb8 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -758,6 +758,11 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX, dev->wiphy.available_antennas_rx); + if (dev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) + NLA_PUT_U32(msg, + NL80211_ATTR_PROBE_RESP_OFFLOAD_SUPPORT, + dev->wiphy.probe_resp_offload); + if ((dev->wiphy.available_antennas_tx || dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) { u32 tx_ant = 0, rx_ant = 0; -- 1.7.5.4