Merge tag 'mac80211-next-for-davem-2016-04-06' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next

Johannes Berg says:

====================
For the 4.7 cycle, we have a number of changes:
 * Bob's mesh mode rhashtable conversion, this includes
   the rhashtable API change for allocation flags
 * BSSID scan, connect() command reassoc support (Jouni)
 * fast (optimised data only) and support for RSS in mac80211 (myself)
 * various smaller changes
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 187 insertions, 8 deletions

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 3b1f6cef9513..b118744d3382 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -7,6 +7,7 @@
  * Copyright (c) 2005, Devicescape Software, Inc.
  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
  * Copyright (c) 2013 - 2014 Intel Mobile Communications GmbH
+ * Copyright (c) 2016 Intel Deutschland GmbH
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -163,6 +164,9 @@ static inline u16 ieee80211_sn_sub(u16 sn1, u16 sn2)
 /* 30 byte 4 addr hdr, 2 byte QoS, 2304 byte MSDU, 12 byte crypt, 4 byte FCS */
 #define IEEE80211_MAX_FRAME_LEN		2352
 
+/* Maximal size of an A-MSDU that can be transported in a HT BA session */
+#define IEEE80211_MAX_MPDU_LEN_HT_BA		4095
+
 /* Maximal size of an A-MSDU */
 #define IEEE80211_MAX_MPDU_LEN_HT_3839		3839
 #define IEEE80211_MAX_MPDU_LEN_HT_7935		7935
@@ -637,6 +641,16 @@ static inline bool ieee80211_is_first_frag(__le16 seq_ctrl)
 	return (seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG)) == 0;
 }
 
+/**
+ * ieee80211_is_frag - check if a frame is a fragment
+ * @hdr: 802.11 header of the frame
+ */
+static inline bool ieee80211_is_frag(struct ieee80211_hdr *hdr)
+{
+	return ieee80211_has_morefrags(hdr->frame_control) ||
+	       hdr->seq_ctrl & cpu_to_le16(IEEE80211_SCTL_FRAG);
+}
+
 struct ieee80211s_hdr {
 	u8 flags;
 	u8 ttl;
@@ -1011,6 +1025,16 @@ struct ieee80211_mgmt {
 					u8 tpc_elem_length;
 					struct ieee80211_tpc_report_ie tpc;
 				} __packed tpc_report;
+				struct {
+					u8 action_code;
+					u8 dialog_token;
+					u8 follow_up;
+					u8 tod[6];
+					u8 toa[6];
+					__le16 tod_error;
+					__le16 toa_error;
+					u8 variable[0];
+				} __packed ftm;
 			} u;
 		} __packed action;
 	} u;
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 63bd7601b6de..3eef0802a0cd 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -346,7 +346,8 @@ struct bucket_table *rhashtable_insert_slow(struct rhashtable *ht,
 					    struct bucket_table *old_tbl);
 int rhashtable_insert_rehash(struct rhashtable *ht, struct bucket_table *tbl);
 
-int rhashtable_walk_init(struct rhashtable *ht, struct rhashtable_iter *iter);
+int rhashtable_walk_init(struct rhashtable *ht, struct rhashtable_iter *iter,
+			 gfp_t gfp);
 void rhashtable_walk_exit(struct rhashtable_iter *iter);
 int rhashtable_walk_start(struct rhashtable_iter *iter) __acquires(RCU);
 void *rhashtable_walk_next(struct rhashtable_iter *iter);
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 9e1b24c29f0c..b39277eb251f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -816,6 +816,7 @@ enum station_parameters_apply_mask {
  * @supported_oper_classes_len: number of supported operating classes
  * @opmode_notif: operating mode field from Operating Mode Notification
  * @opmode_notif_used: information if operating mode field is used
+ * @support_p2p_ps: information if station supports P2P PS mechanism
  */
 struct station_parameters {
 	const u8 *supported_rates;
@@ -841,6 +842,7 @@ struct station_parameters {
 	u8 supported_oper_classes_len;
 	u8 opmode_notif;
 	bool opmode_notif_used;
+	int support_p2p_ps;
 };
 
 /**
@@ -1455,6 +1457,7 @@ struct cfg80211_ssid {
  * @mac_addr_mask: MAC address mask used with randomisation, bits that
  *	are 0 in the mask should be randomised, bits that are 1 should
  *	be taken from the @mac_addr
+ * @bssid: BSSID to scan for (most commonly, the wildcard BSSID)
  */
 struct cfg80211_scan_request {
 	struct cfg80211_ssid *ssids;
@@ -1471,6 +1474,7 @@ struct cfg80211_scan_request {
 
 	u8 mac_addr[ETH_ALEN] __aligned(2);
 	u8 mac_addr_mask[ETH_ALEN] __aligned(2);
+	u8 bssid[ETH_ALEN] __aligned(2);
 
 	/* internal */
 	struct wiphy *wiphy;
@@ -1617,7 +1621,7 @@ struct cfg80211_inform_bss {
 };
 
 /**
- * struct cfg80211_bss_ie_data - BSS entry IE data
+ * struct cfg80211_bss_ies - BSS entry IE data
  * @tsf: TSF contained in the frame that carried these IEs
  * @rcu_head: internal use, for freeing
  * @len: length of the IEs
@@ -1857,6 +1861,33 @@ struct cfg80211_ibss_params {
 };
 
 /**
+ * struct cfg80211_bss_select_adjust - BSS selection with RSSI adjustment.
+ *
+ * @band: band of BSS which should match for RSSI level adjustment.
+ * @delta: value of RSSI level adjustment.
+ */
+struct cfg80211_bss_select_adjust {
+	enum ieee80211_band band;
+	s8 delta;
+};
+
+/**
+ * struct cfg80211_bss_selection - connection parameters for BSS selection.
+ *
+ * @behaviour: requested BSS selection behaviour.
+ * @param: parameters for requestion behaviour.
+ * @band_pref: preferred band for %NL80211_BSS_SELECT_ATTR_BAND_PREF.
+ * @adjust: parameters for %NL80211_BSS_SELECT_ATTR_RSSI_ADJUST.
+ */
+struct cfg80211_bss_selection {
+	enum nl80211_bss_select_attr behaviour;
+	union {
+		enum ieee80211_band band_pref;
+		struct cfg80211_bss_select_adjust adjust;
+	} param;
+};
+
+/**
  * struct cfg80211_connect_params - Connection parameters
  *
  * This structure provides information needed to complete IEEE 802.11
@@ -1893,6 +1924,8 @@ struct cfg80211_ibss_params {
  * @vht_capa_mask: The bits of vht_capa which are to be used.
  * @pbss: if set, connect to a PCP instead of AP. Valid for DMG
  *	networks.
+ * @bss_select: criteria to be used for BSS selection.
+ * @prev_bssid: previous BSSID, if not %NULL use reassociate frame
  */
 struct cfg80211_connect_params {
 	struct ieee80211_channel *channel;
@@ -1916,6 +1949,8 @@ struct cfg80211_connect_params {
 	struct ieee80211_vht_cap vht_capa;
 	struct ieee80211_vht_cap vht_capa_mask;
 	bool pbss;
+	struct cfg80211_bss_selection bss_select;
+	const u8 *prev_bssid;
 };
 
 /**
@@ -3184,6 +3219,9 @@ struct wiphy_vendor_command {
  *	low rssi when a frame is heard on different channel, then it should set
  *	this variable to the maximal offset for which it can compensate.
  *	This value should be set in MHz.
+ * @bss_select_support: bitmask indicating the BSS selection criteria supported
+ *	by the driver in the .connect() callback. The bit position maps to the
+ *	attribute indices defined in &enum nl80211_bss_select_attr.
  */
 struct wiphy {
 	/* assign these fields before you register the wiphy */
@@ -3306,6 +3344,8 @@ struct wiphy {
 	u8 max_num_csa_counters;
 	u8 max_adj_channel_rssi_comp;
 
+	u32 bss_select_support;
+
 	char priv[0] __aligned(NETDEV_ALIGN);
 };
 
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 0c09da34b67a..a3ee76559791 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -291,7 +291,7 @@ struct ieee80211_vif_chanctx_switch {
  * @BSS_CHANGED_PS: PS changed for this BSS (STA mode)
  * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
  * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS)
- *	changed (currently only in P2P client mode, GO mode will be later)
+ *	changed
  * @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available:
  *	currently dtim_period only is under consideration.
  * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed,
@@ -526,6 +526,9 @@ struct ieee80211_mu_group_data {
  *	userspace), whereas TPC is disabled if %txpower_type is set to
  *	NL80211_TX_POWER_FIXED (use value configured from userspace)
  * @p2p_noa_attr: P2P NoA attribute for P2P powersave
+ * @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed
+ *	to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS
+ *	if it has associated clients without P2P PS support.
  */
 struct ieee80211_bss_conf {
 	const u8 *bssid;
@@ -563,6 +566,7 @@ struct ieee80211_bss_conf {
 	int txpower;
 	enum nl80211_tx_power_setting txpower_type;
 	struct ieee80211_p2p_noa_attr p2p_noa_attr;
+	bool allow_p2p_go_ps;
 };
 
 /**
@@ -709,6 +713,7 @@ enum mac80211_tx_info_flags {
  * @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll
  *	frame (PS-Poll or uAPSD).
  * @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information
+ * @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame
  *
  * These flags are used in tx_info->control.flags.
  */
@@ -716,6 +721,7 @@ enum mac80211_tx_control_flags {
 	IEEE80211_TX_CTRL_PORT_CTRL_PROTO	= BIT(0),
 	IEEE80211_TX_CTRL_PS_RESPONSE		= BIT(1),
 	IEEE80211_TX_CTRL_RATE_INJECT		= BIT(2),
+	IEEE80211_TX_CTRL_AMSDU			= BIT(3),
 };
 
 /*
@@ -1034,6 +1040,8 @@ ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
  *	on this subframe
  * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC
  *	is stored in the @ampdu_delimiter_crc field)
+ * @RX_FLAG_MIC_STRIPPED: The mic was stripped of this packet. Decryption was
+ *	done by the hardware
  * @RX_FLAG_LDPC: LDPC was used
  * @RX_FLAG_ONLY_MONITOR: Report frame only to monitor interfaces without
  *	processing it in any regular way.
@@ -1091,6 +1099,7 @@ enum mac80211_rx_flags {
 	RX_FLAG_5MHZ			= BIT(29),
 	RX_FLAG_AMSDU_MORE		= BIT(30),
 	RX_FLAG_RADIOTAP_VENDOR_DATA	= BIT(31),
+	RX_FLAG_MIC_STRIPPED            = BIT_ULL(32),
 };
 
 #define RX_FLAG_STBC_SHIFT		26
@@ -1120,6 +1129,8 @@ enum mac80211_rx_vht_flags {
  *
  * @mactime: value in microseconds of the 64-bit Time Synchronization Function
  * 	(TSF) timer when the first data symbol (MPDU) arrived at the hardware.
+ * @boottime_ns: CLOCK_BOOTTIME timestamp the frame was received at, this is
+ *	needed only for beacons and probe responses that update the scan cache.
  * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use
  *	it but can store it and pass it back to the driver for synchronisation
  * @band: the active band when this frame was received
@@ -1146,9 +1157,10 @@ enum mac80211_rx_vht_flags {
  */
 struct ieee80211_rx_status {
 	u64 mactime;
+	u64 boottime_ns;
 	u32 device_timestamp;
 	u32 ampdu_reference;
-	u32 flag;
+	u64 flag;
 	u16 freq;
 	u8 vht_flag;
 	u8 rate_idx;
@@ -1735,6 +1747,8 @@ struct ieee80211_sta_rates {
  *		  size is min(max_amsdu_len, 7935) bytes.
  *	Both additional HT limits must be enforced by the low level driver.
  *	This is defined by the spec (IEEE 802.11-2012 section 8.3.2.2 NOTE 2).
+ * @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not.
+ * @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control.
  * @txq: per-TID data TX queues (if driver uses the TXQ abstraction)
  */
 struct ieee80211_sta {
@@ -1755,6 +1769,8 @@ struct ieee80211_sta {
 	bool mfp;
 	u8 max_amsdu_subframes;
 	u16 max_amsdu_len;
+	bool support_p2p_ps;
+	u16 max_rc_amsdu_len;
 
 	struct ieee80211_txq *txq[IEEE80211_NUM_TIDS];
 
@@ -1968,6 +1984,18 @@ struct ieee80211_txq {
  *	order and does not need to manage its own reorder buffer or BA session
  *	timeout.
  *
+ * @IEEE80211_HW_USES_RSS: The device uses RSS and thus requires parallel RX,
+ *	which implies using per-CPU station statistics.
+ *
+ * @IEEE80211_HW_TX_AMSDU: Hardware (or driver) supports software aggregated
+ *	A-MSDU frames. Requires software tx queueing and fast-xmit support.
+ *	When not using minstrel/minstrel_ht rate control, the driver must
+ *	limit the maximum A-MSDU size based on the current tx rate by setting
+ *	max_rc_amsdu_len in struct ieee80211_sta.
+ *
+ * @IEEE80211_HW_TX_FRAG_LIST: Hardware (or driver) supports sending frag_list
+ *	skbs, needed for zero-copy software A-MSDU.
+ *
  * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
  */
 enum ieee80211_hw_flags {
@@ -2005,6 +2033,9 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_BEACON_TX_STATUS,
 	IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR,
 	IEEE80211_HW_SUPPORTS_REORDERING_BUFFER,
+	IEEE80211_HW_USES_RSS,
+	IEEE80211_HW_TX_AMSDU,
+	IEEE80211_HW_TX_FRAG_LIST,
 
 	/* keep last, obviously */
 	NUM_IEEE80211_HW_FLAGS
@@ -2077,6 +2108,9 @@ enum ieee80211_hw_flags {
  *	size is smaller (an example is LinkSys WRT120N with FW v1.0.07
  *	build 002 Jun 18 2012).
  *
+ * @max_tx_fragments: maximum number of tx buffers per (A)-MSDU, sum
+ *	of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list.
+ *
  * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX
  *	(if %IEEE80211_HW_QUEUE_CONTROL is set)
  *
@@ -2131,6 +2165,7 @@ struct ieee80211_hw {
 	u8 max_rate_tries;
 	u8 max_rx_aggregation_subframes;
 	u8 max_tx_aggregation_subframes;
+	u8 max_tx_fragments;
 	u8 offchannel_tx_hw_queue;
 	u8 radiotap_mcs_details;
 	u16 radiotap_vht_details;
@@ -3348,6 +3383,10 @@ enum ieee80211_reconfig_type {
  *	the function call.
  *
  * @wake_tx_queue: Called when new packets have been added to the queue.
+ * @sync_rx_queues: Process all pending frames in RSS queues. This is a
+ *	synchronization which is needed in case driver has in its RSS queues
+ *	pending frames that were received prior to the control path action
+ *	currently taken (e.g. disassociation) but are not processed yet.
  */
 struct ieee80211_ops {
 	void (*tx)(struct ieee80211_hw *hw,
@@ -3585,6 +3624,7 @@ struct ieee80211_ops {
 
 	void (*wake_tx_queue)(struct ieee80211_hw *hw,
 			      struct ieee80211_txq *txq);
+	void (*sync_rx_queues)(struct ieee80211_hw *hw);
 };
 
 /**
@@ -3838,11 +3878,12 @@ void ieee80211_restart_hw(struct ieee80211_hw *hw);
  * This function must be called with BHs disabled.
  *
  * @hw: the hardware this frame came in on
+ * @sta: the station the frame was received from, or %NULL
  * @skb: the buffer to receive, owned by mac80211 after this call
  * @napi: the NAPI context
  */
-void ieee80211_rx_napi(struct ieee80211_hw *hw, struct sk_buff *skb,
-		       struct napi_struct *napi);
+void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
+		       struct sk_buff *skb, struct napi_struct *napi);
 
 /**
  * ieee80211_rx - receive frame
@@ -3866,7 +3907,7 @@ void ieee80211_rx_napi(struct ieee80211_hw *hw, struct sk_buff *skb,
  */
 static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
-	ieee80211_rx_napi(hw, skb, NULL);
+	ieee80211_rx_napi(hw, NULL, skb, NULL);
 }
 
 /**
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 5a30a7563633..6da52d7b48c4 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -322,7 +322,9 @@
  * @NL80211_CMD_GET_SCAN: get scan results
  * @NL80211_CMD_TRIGGER_SCAN: trigger a new scan with the given parameters
  *	%NL80211_ATTR_TX_NO_CCK_RATE is used to decide whether to send the
- *	probe requests at CCK rate or not.
+ *	probe requests at CCK rate or not. %NL80211_ATTR_MAC can be used to
+ *	specify a BSSID to scan for; if not included, the wildcard BSSID will
+ *	be used.
  * @NL80211_CMD_NEW_SCAN_RESULTS: scan notification (as a reply to
  *	NL80211_CMD_GET_SCAN and on the "scan" multicast group)
  * @NL80211_CMD_SCAN_ABORTED: scan was aborted, for unspecified reasons,
@@ -1795,6 +1797,15 @@ enum nl80211_commands {
  *	in a PBSS. Specified in %NL80211_CMD_CONNECT to request
  *	connecting to a PCP, and in %NL80211_CMD_START_AP to start
  *	a PCP instead of AP. Relevant for DMG networks only.
+ * @NL80211_ATTR_BSS_SELECT: nested attribute for driver supporting the
+ *	BSS selection feature. When used with %NL80211_CMD_GET_WIPHY it contains
+ *	attributes according &enum nl80211_bss_select_attr to indicate what
+ *	BSS selection behaviours are supported. When used with %NL80211_CMD_CONNECT
+ *	it contains the behaviour-specific attribute containing the parameters for
+ *	BSS selection to be done by driver and/or firmware.
+ *
+ * @NL80211_ATTR_STA_SUPPORT_P2P_PS: whether P2P PS mechanism supported
+ *	or not. u8, one of the values of &enum nl80211_sta_p2p_ps_status
  *
  * @NUM_NL80211_ATTR: total number of nl80211_attrs available
  * @NL80211_ATTR_MAX: highest attribute number currently defined
@@ -2172,6 +2183,10 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_PBSS,
 
+	NL80211_ATTR_BSS_SELECT,
+
+	NL80211_ATTR_STA_SUPPORT_P2P_PS,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -2315,6 +2330,20 @@ enum nl80211_sta_flags {
 	NL80211_STA_FLAG_MAX = __NL80211_STA_FLAG_AFTER_LAST - 1
 };
 
+/**
+ * enum nl80211_sta_p2p_ps_status - station support of P2P PS
+ *
+ * @NL80211_P2P_PS_UNSUPPORTED: station doesn't support P2P PS mechanism
+ * @@NL80211_P2P_PS_SUPPORTED: station supports P2P PS mechanism
+ * @NUM_NL80211_P2P_PS_STATUS: number of values
+ */
+enum nl80211_sta_p2p_ps_status {
+	NL80211_P2P_PS_UNSUPPORTED = 0,
+	NL80211_P2P_PS_SUPPORTED,
+
+	NUM_NL80211_P2P_PS_STATUS,
+};
+
 #define NL80211_STA_FLAG_MAX_OLD_API	NL80211_STA_FLAG_TDLS_PEER
 
 /**
@@ -4665,4 +4694,48 @@ enum nl80211_sched_scan_plan {
 		__NL80211_SCHED_SCAN_PLAN_AFTER_LAST - 1
 };
 
+/**
+ * struct nl80211_bss_select_rssi_adjust - RSSI adjustment parameters.
+ *
+ * @band: band of BSS that must match for RSSI value adjustment.
+ * @delta: value used to adjust the RSSI value of matching BSS.
+ */
+struct nl80211_bss_select_rssi_adjust {
+	__u8 band;
+	__s8 delta;
+} __attribute__((packed));
+
+/**
+ * enum nl80211_bss_select_attr - attributes for bss selection.
+ *
+ * @__NL80211_BSS_SELECT_ATTR_INVALID: reserved.
+ * @NL80211_BSS_SELECT_ATTR_RSSI: Flag indicating only RSSI-based BSS selection
+ *	is requested.
+ * @NL80211_BSS_SELECT_ATTR_BAND_PREF: attribute indicating BSS
+ *	selection should be done such that the specified band is preferred.
+ *	When there are multiple BSS-es in the preferred band, the driver
+ *	shall use RSSI-based BSS selection as a second step. The value of
+ *	this attribute is according to &enum nl80211_band (u32).
+ * @NL80211_BSS_SELECT_ATTR_RSSI_ADJUST: When present the RSSI level for
+ *	BSS-es in the specified band is to be adjusted before doing
+ *	RSSI-based BSS selection. The attribute value is a packed structure
+ *	value as specified by &struct nl80211_bss_select_rssi_adjust.
+ * @NL80211_BSS_SELECT_ATTR_MAX: highest bss select attribute number.
+ * @__NL80211_BSS_SELECT_ATTR_AFTER_LAST: internal use.
+ *
+ * One and only one of these attributes are found within %NL80211_ATTR_BSS_SELECT
+ * for %NL80211_CMD_CONNECT. It specifies the required BSS selection behaviour
+ * which the driver shall use.
+ */
+enum nl80211_bss_select_attr {
+	__NL80211_BSS_SELECT_ATTR_INVALID,
+	NL80211_BSS_SELECT_ATTR_RSSI,
+	NL80211_BSS_SELECT_ATTR_BAND_PREF,
+	NL80211_BSS_SELECT_ATTR_RSSI_ADJUST,
+
+	/* keep last */
+	__NL80211_BSS_SELECT_ATTR_AFTER_LAST,
+	NL80211_BSS_SELECT_ATTR_MAX = __NL80211_BSS_SELECT_ATTR_AFTER_LAST - 1
+};
+
 #endif /* __LINUX_NL80211_H */