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>
---
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
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
