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>

2 files changed, 38 insertions, 0 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 3152ddfb4294..be92333cf8fe 100644
--- 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 50e3608f5656..093f538f65d6 100644
--- 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