nl80211: Add probe response offload attribute

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 <guy@wizery.com>
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 3152ddfb42941bbc9f13759cbce9ee7f59c9a698..be92333cf8fe6b888d5858a9d70a9e830641d131 100644 (file)
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1160,6 +1160,11 @@ enum nl80211_commands {
  *
  * @NL80211_ATTR_FEATURE_FLAGS: This u32 attribute contains flags from
  *     &enum nl80211_feature_flags and is advertised in wiphy information.
+ * @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
@@ -1395,6 +1400,8 @@ enum nl80211_attrs {
 
        NL80211_ATTR_FEATURE_FLAGS,
 
+       NL80211_ATTR_PROBE_RESP_OFFLOAD,
+
        /* add attributes here, update the policy in nl80211.c */
 
        __NL80211_ATTR_AFTER_LAST,
@@ -2727,4 +2734,25 @@ enum nl80211_feature_flags {
        NL80211_FEATURE_SK_TX_STATUS    = 1 << 0,
 };
 
+/**
+ * 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 50e3608f56562a7d88b3f6b05493dd071060ef87..093f538f65d6cf54558d16493454619c563090b5 100644 (file)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1694,6 +1694,8 @@ struct cfg80211_ops {
  * @WIPHY_FLAG_REPORTS_OBSS: the device will report beacons from other BSSes
  *     when there are virtual interfaces in AP mode by calling
  *     cfg80211_report_obss_beacon().
+ * @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),
@@ -1714,6 +1716,7 @@ enum wiphy_flags {
        WIPHY_FLAG_TDLS_EXTERNAL_SETUP          = BIT(16),
        WIPHY_FLAG_HAVE_AP_SME                  = BIT(17),
        WIPHY_FLAG_REPORTS_OBSS                 = BIT(18),
+       WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD        = BIT(19),
 };
 
 /**
@@ -1982,6 +1985,13 @@ 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 258fb881c8e366426dde11bf33a407dab1309bed..f395a06c114a9007e8e3d884943efed4bb3e00d0 100644 (file)
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -759,6 +759,10 @@ 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,
+                           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;