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@xxxxxxxxxx>
Signed-off-by: Arik Nemtsov <arik@xxxxxxxxxx>
---
v4->5:
- fixed up the constant of the PROBE_RESP_OFFLOAD attribute (left over
from v3)
- rebased everything on wireless-testing
include/linux/nl80211.h | 28 ++++++++++++++++++++++++++++
include/net/cfg80211.h | 10 ++++++++++
net/wireless/nl80211.c | 4 ++++
3 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 3152ddf..be92333 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 e1ee141..243bf23 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1689,6 +1689,8 @@ 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),
@@ -1709,6 +1711,7 @@ 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),
};
/**
@@ -1977,6 +1980,13 @@ 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 864fcb6..0349f48 100644
--- 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;
--
1.7.5.4
--
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