Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 718 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
new file mode 100644
index 000000000..ee72faac2
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -0,0 +1,718 @@
+/*
+ * Copyright (c) 2008-2011 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/dma-mapping.h>
+#include "ath9k.h"
+
+#define FUDGE 2
+
+static void ath9k_reset_beacon_status(struct ath_softc *sc)
+{
+	sc->beacon.tx_processed = false;
+	sc->beacon.tx_last = false;
+}
+
+/*
+ *  This function will modify certain transmit queue properties depending on
+ *  the operating mode of the station (AP or AdHoc).  Parameters are AIFS
+ *  settings and channel width min/max
+*/
+static void ath9k_beaconq_config(struct ath_softc *sc)
+{
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath9k_tx_queue_info qi, qi_be;
+	struct ath_txq *txq;
+
+	ath9k_hw_get_txq_props(ah, sc->beacon.beaconq, &qi);
+
+	if (sc->sc_ah->opmode == NL80211_IFTYPE_AP ||
+	    sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) {
+		/* Always burst out beacon and CAB traffic. */
+		qi.tqi_aifs = 1;
+		qi.tqi_cwmin = 0;
+		qi.tqi_cwmax = 0;
+	} else {
+		/* Adhoc mode; important thing is to use 2x cwmin. */
+		txq = sc->tx.txq_map[IEEE80211_AC_BE];
+		ath9k_hw_get_txq_props(ah, txq->axq_qnum, &qi_be);
+		qi.tqi_aifs = qi_be.tqi_aifs;
+		if (ah->slottime == 20)
+			qi.tqi_cwmin = 2*qi_be.tqi_cwmin;
+		else
+			qi.tqi_cwmin = 4*qi_be.tqi_cwmin;
+		qi.tqi_cwmax = qi_be.tqi_cwmax;
+	}
+
+	if (!ath9k_hw_set_txq_props(ah, sc->beacon.beaconq, &qi)) {
+		ath_err(common, "Unable to update h/w beacon queue parameters\n");
+	} else {
+		ath9k_hw_resettxqueue(ah, sc->beacon.beaconq);
+	}
+}
+
+/*
+ *  Associates the beacon frame buffer with a transmit descriptor.  Will set
+ *  up rate codes, and channel flags. Beacons are always sent out at the
+ *  lowest rate, and are not retried.
+*/
+static void ath9k_beacon_setup(struct ath_softc *sc, struct ieee80211_vif *vif,
+			     struct ath_buf *bf, int rateidx)
+{
+	struct sk_buff *skb = bf->bf_mpdu;
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath_tx_info info;
+	struct ieee80211_supported_band *sband;
+	u8 chainmask = ah->txchainmask;
+	u8 i, rate = 0;
+
+	sband = &common->sbands[sc->cur_chandef.chan->band];
+	rate = sband->bitrates[rateidx].hw_value;
+	if (vif->bss_conf.use_short_preamble)
+		rate |= sband->bitrates[rateidx].hw_value_short;
+
+	memset(&info, 0, sizeof(info));
+	info.pkt_len = skb->len + FCS_LEN;
+	info.type = ATH9K_PKT_TYPE_BEACON;
+	for (i = 0; i < 4; i++)
+		info.txpower[i] = MAX_RATE_POWER;
+	info.keyix = ATH9K_TXKEYIX_INVALID;
+	info.keytype = ATH9K_KEY_TYPE_CLEAR;
+	info.flags = ATH9K_TXDESC_NOACK | ATH9K_TXDESC_CLRDMASK;
+
+	info.buf_addr[0] = bf->bf_buf_addr;
+	info.buf_len[0] = roundup(skb->len, 4);
+
+	info.is_first = true;
+	info.is_last = true;
+
+	info.qcu = sc->beacon.beaconq;
+
+	info.rates[0].Tries = 1;
+	info.rates[0].Rate = rate;
+	info.rates[0].ChSel = ath_txchainmask_reduction(sc, chainmask, rate);
+
+	ath9k_hw_set_txdesc(ah, bf->bf_desc, &info);
+}
+
+static struct ath_buf *ath9k_beacon_generate(struct ieee80211_hw *hw,
+					     struct ieee80211_vif *vif)
+{
+	struct ath_softc *sc = hw->priv;
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_buf *bf;
+	struct ath_vif *avp = (void *)vif->drv_priv;
+	struct sk_buff *skb;
+	struct ath_txq *cabq = sc->beacon.cabq;
+	struct ieee80211_tx_info *info;
+	struct ieee80211_mgmt *mgmt_hdr;
+	int cabq_depth;
+
+	if (avp->av_bcbuf == NULL)
+		return NULL;
+
+	bf = avp->av_bcbuf;
+	skb = bf->bf_mpdu;
+	if (skb) {
+		dma_unmap_single(sc->dev, bf->bf_buf_addr,
+				 skb->len, DMA_TO_DEVICE);
+		dev_kfree_skb_any(skb);
+		bf->bf_buf_addr = 0;
+		bf->bf_mpdu = NULL;
+	}
+
+	skb = ieee80211_beacon_get(hw, vif, 0);
+	if (skb == NULL)
+		return NULL;
+
+	bf->bf_mpdu = skb;
+
+	mgmt_hdr = (struct ieee80211_mgmt *)skb->data;
+	mgmt_hdr->u.beacon.timestamp = avp->tsf_adjust;
+
+	info = IEEE80211_SKB_CB(skb);
+
+	ath_assign_seq(common, skb);
+
+	/* Always assign NOA attr when MCC enabled */
+	if (ath9k_is_chanctx_enabled())
+		ath9k_beacon_add_noa(sc, avp, skb);
+
+	bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
+					 skb->len, DMA_TO_DEVICE);
+	if (unlikely(dma_mapping_error(sc->dev, bf->bf_buf_addr))) {
+		dev_kfree_skb_any(skb);
+		bf->bf_mpdu = NULL;
+		bf->bf_buf_addr = 0;
+		ath_err(common, "dma_mapping_error on beaconing\n");
+		return NULL;
+	}
+
+	skb = ieee80211_get_buffered_bc(hw, vif);
+
+	/*
+	 * if the CABQ traffic from previous DTIM is pending and the current
+	 *  beacon is also a DTIM.
+	 *  1) if there is only one vif let the cab traffic continue.
+	 *  2) if there are more than one vif and we are using staggered
+	 *     beacons, then drain the cabq by dropping all the frames in
+	 *     the cabq so that the current vifs cab traffic can be scheduled.
+	 */
+	spin_lock_bh(&cabq->axq_lock);
+	cabq_depth = cabq->axq_depth;
+	spin_unlock_bh(&cabq->axq_lock);
+
+	if (skb && cabq_depth) {
+		if (sc->cur_chan->nvifs > 1) {
+			ath_dbg(common, BEACON,
+				"Flushing previous cabq traffic\n");
+			ath_draintxq(sc, cabq);
+		}
+	}
+
+	ath9k_beacon_setup(sc, vif, bf, info->control.rates[0].idx);
+
+	if (skb)
+		ath_tx_cabq(hw, vif, skb);
+
+	return bf;
+}
+
+void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_vif *avp = (void *)vif->drv_priv;
+	int slot;
+
+	avp->av_bcbuf = list_first_entry(&sc->beacon.bbuf, struct ath_buf, list);
+	list_del(&avp->av_bcbuf->list);
+
+	for (slot = 0; slot < ATH_BCBUF; slot++) {
+		if (sc->beacon.bslot[slot] == NULL) {
+			avp->av_bslot = slot;
+			break;
+		}
+	}
+
+	sc->beacon.bslot[avp->av_bslot] = vif;
+
+	ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n",
+		avp->av_bslot);
+}
+
+void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_vif *avp = (void *)vif->drv_priv;
+	struct ath_buf *bf = avp->av_bcbuf;
+
+	ath_dbg(common, CONFIG, "Removing interface at beacon slot: %d\n",
+		avp->av_bslot);
+
+	tasklet_disable(&sc->bcon_tasklet);
+
+	if (bf && bf->bf_mpdu) {
+		struct sk_buff *skb = bf->bf_mpdu;
+		dma_unmap_single(sc->dev, bf->bf_buf_addr,
+				 skb->len, DMA_TO_DEVICE);
+		dev_kfree_skb_any(skb);
+		bf->bf_mpdu = NULL;
+		bf->bf_buf_addr = 0;
+	}
+
+	avp->av_bcbuf = NULL;
+	sc->beacon.bslot[avp->av_bslot] = NULL;
+	list_add_tail(&bf->list, &sc->beacon.bbuf);
+
+	tasklet_enable(&sc->bcon_tasklet);
+}
+
+void ath9k_beacon_ensure_primary_slot(struct ath_softc *sc)
+{
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ieee80211_vif *vif;
+	struct ath_vif *avp;
+	s64 tsfadjust;
+	u32 offset;
+	int first_slot = ATH_BCBUF;
+	int slot;
+
+	tasklet_disable_in_atomic(&sc->bcon_tasklet);
+
+	/* Find first taken slot. */
+	for (slot = 0; slot < ATH_BCBUF; slot++) {
+		if (sc->beacon.bslot[slot]) {
+			first_slot = slot;
+			break;
+		}
+	}
+	if (first_slot == 0)
+		goto out;
+
+	/* Re-enumarate all slots, moving them forward. */
+	for (slot = 0; slot < ATH_BCBUF; slot++) {
+		if (slot + first_slot < ATH_BCBUF) {
+			vif = sc->beacon.bslot[slot + first_slot];
+			sc->beacon.bslot[slot] = vif;
+
+			if (vif) {
+				avp = (void *)vif->drv_priv;
+				avp->av_bslot = slot;
+			}
+		} else {
+			sc->beacon.bslot[slot] = NULL;
+		}
+	}
+
+	vif = sc->beacon.bslot[0];
+	if (WARN_ON(!vif))
+		goto out;
+
+	/* Get the tsf_adjust value for the new first slot. */
+	avp = (void *)vif->drv_priv;
+	tsfadjust = le64_to_cpu(avp->tsf_adjust);
+
+	ath_dbg(common, CONFIG,
+		"Adjusting global TSF after beacon slot reassignment: %lld\n",
+		(signed long long)tsfadjust);
+
+	/* Modify TSF as required and update the HW. */
+	avp->chanctx->tsf_val += tsfadjust;
+	if (sc->cur_chan == avp->chanctx) {
+		offset = ath9k_hw_get_tsf_offset(&avp->chanctx->tsf_ts, NULL);
+		ath9k_hw_settsf64(sc->sc_ah, avp->chanctx->tsf_val + offset);
+	}
+
+	/* The slots tsf_adjust will be updated by ath9k_beacon_config later. */
+
+out:
+	tasklet_enable(&sc->bcon_tasklet);
+}
+
+static int ath9k_beacon_choose_slot(struct ath_softc *sc)
+{
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon;
+	u16 intval;
+	u32 tsftu;
+	u64 tsf;
+	int slot;
+
+	if (sc->sc_ah->opmode != NL80211_IFTYPE_AP &&
+	    sc->sc_ah->opmode != NL80211_IFTYPE_MESH_POINT) {
+		ath_dbg(common, BEACON, "slot 0, tsf: %llu\n",
+			ath9k_hw_gettsf64(sc->sc_ah));
+		return 0;
+	}
+
+	intval = cur_conf->beacon_interval ? : ATH_DEFAULT_BINTVAL;
+	tsf = ath9k_hw_gettsf64(sc->sc_ah);
+	tsf += TU_TO_USEC(sc->sc_ah->config.sw_beacon_response_time);
+	tsftu = TSF_TO_TU((tsf * ATH_BCBUF) >>32, tsf * ATH_BCBUF);
+	slot = (tsftu % (intval * ATH_BCBUF)) / intval;
+
+	ath_dbg(common, BEACON, "slot: %d tsf: %llu tsftu: %u\n",
+		slot, tsf, tsftu / ATH_BCBUF);
+
+	return slot;
+}
+
+static void ath9k_set_tsfadjust(struct ath_softc *sc,
+				struct ath_beacon_config *cur_conf)
+{
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	s64 tsfadjust;
+	int slot;
+
+	for (slot = 0; slot < ATH_BCBUF; slot++) {
+		struct ath_vif *avp;
+
+		if (!sc->beacon.bslot[slot])
+			continue;
+
+		avp = (void *)sc->beacon.bslot[slot]->drv_priv;
+
+		/* tsf_adjust is added to the TSF value. We send out the
+		 * beacon late, so need to adjust the TSF starting point to be
+		 * later in time (i.e. the theoretical first beacon has a TSF
+		 * of 0 after correction).
+		 */
+		tsfadjust = cur_conf->beacon_interval * avp->av_bslot;
+		tsfadjust = -TU_TO_USEC(tsfadjust) / ATH_BCBUF;
+		avp->tsf_adjust = cpu_to_le64(tsfadjust);
+
+		ath_dbg(common, CONFIG, "tsfadjust is: %lld for bslot: %d\n",
+			(signed long long)tsfadjust, avp->av_bslot);
+	}
+}
+
+bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif)
+{
+	if (!vif || !vif->bss_conf.csa_active)
+		return false;
+
+	if (!ieee80211_beacon_cntdwn_is_complete(vif))
+		return false;
+
+	ieee80211_csa_finish(vif);
+	return true;
+}
+
+static void ath9k_csa_update_vif(void *data, u8 *mac, struct ieee80211_vif *vif)
+{
+	struct ath_softc *sc = data;
+	ath9k_csa_is_finished(sc, vif);
+}
+
+void ath9k_csa_update(struct ath_softc *sc)
+{
+	ieee80211_iterate_active_interfaces_atomic(sc->hw,
+						   IEEE80211_IFACE_ITER_NORMAL,
+						   ath9k_csa_update_vif, sc);
+}
+
+void ath9k_beacon_tasklet(struct tasklet_struct *t)
+{
+	struct ath_softc *sc = from_tasklet(sc, t, bcon_tasklet);
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath_buf *bf = NULL;
+	struct ieee80211_vif *vif;
+	bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
+	int slot;
+
+	if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) {
+		ath_dbg(common, RESET,
+			"reset work is pending, skip beaconing now\n");
+		return;
+	}
+
+	/*
+	 * Check if the previous beacon has gone out.  If
+	 * not don't try to post another, skip this period
+	 * and wait for the next.  Missed beacons indicate
+	 * a problem and should not occur.  If we miss too
+	 * many consecutive beacons reset the device.
+	 */
+	if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) {
+		sc->beacon.bmisscnt++;
+
+		ath9k_hw_check_nav(ah);
+
+		/*
+		 * If the previous beacon has not been transmitted
+		 * and a MAC/BB hang has been identified, return
+		 * here because a chip reset would have been
+		 * initiated.
+		 */
+		if (!ath_hw_check(sc))
+			return;
+
+		if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) {
+			ath_dbg(common, BSTUCK,
+				"missed %u consecutive beacons\n",
+				sc->beacon.bmisscnt);
+			ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq);
+			if (sc->beacon.bmisscnt > 3)
+				ath9k_hw_bstuck_nfcal(ah);
+		} else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) {
+			ath_dbg(common, BSTUCK, "beacon is officially stuck\n");
+			sc->beacon.bmisscnt = 0;
+			ath9k_queue_reset(sc, RESET_TYPE_BEACON_STUCK);
+		}
+
+		return;
+	}
+
+	slot = ath9k_beacon_choose_slot(sc);
+	vif = sc->beacon.bslot[slot];
+
+	/* EDMA devices check that in the tx completion function. */
+	if (!edma) {
+		if (ath9k_is_chanctx_enabled()) {
+			ath_chanctx_beacon_sent_ev(sc,
+					  ATH_CHANCTX_EVENT_BEACON_SENT);
+		}
+
+		if (ath9k_csa_is_finished(sc, vif))
+			return;
+	}
+
+	if (!vif || !vif->bss_conf.enable_beacon)
+		return;
+
+	if (ath9k_is_chanctx_enabled()) {
+		ath_chanctx_event(sc, vif, ATH_CHANCTX_EVENT_BEACON_PREPARE);
+	}
+
+	bf = ath9k_beacon_generate(sc->hw, vif);
+
+	if (sc->beacon.bmisscnt != 0) {
+		ath_dbg(common, BSTUCK, "resume beacon xmit after %u misses\n",
+			sc->beacon.bmisscnt);
+		sc->beacon.bmisscnt = 0;
+	}
+
+	/*
+	 * Handle slot time change when a non-ERP station joins/leaves
+	 * an 11g network.  The 802.11 layer notifies us via callback,
+	 * we mark updateslot, then wait one beacon before effecting
+	 * the change.  This gives associated stations at least one
+	 * beacon interval to note the state change.
+	 *
+	 * NB: The slot time change state machine is clocked according
+	 *     to whether we are bursting or staggering beacons.  We
+	 *     recognize the request to update and record the current
+	 *     slot then don't transition until that slot is reached
+	 *     again.  If we miss a beacon for that slot then we'll be
+	 *     slow to transition but we'll be sure at least one beacon
+	 *     interval has passed.  When bursting slot is always left
+	 *     set to ATH_BCBUF so this check is a noop.
+	 */
+	if (sc->beacon.updateslot == UPDATE) {
+		sc->beacon.updateslot = COMMIT;
+		sc->beacon.slotupdate = slot;
+	} else if (sc->beacon.updateslot == COMMIT &&
+		   sc->beacon.slotupdate == slot) {
+		ah->slottime = sc->beacon.slottime;
+		ath9k_hw_init_global_settings(ah);
+		sc->beacon.updateslot = OK;
+	}
+
+	if (bf) {
+		ath9k_reset_beacon_status(sc);
+
+		ath_dbg(common, BEACON,
+			"Transmitting beacon for slot: %d\n", slot);
+
+		/* NB: cabq traffic should already be queued and primed */
+		ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr);
+
+		if (!edma)
+			ath9k_hw_txstart(ah, sc->beacon.beaconq);
+	}
+}
+
+/*
+ * Both nexttbtt and intval have to be in usecs.
+ */
+static void ath9k_beacon_init(struct ath_softc *sc, u32 nexttbtt,
+			      u32 intval)
+{
+	struct ath_hw *ah = sc->sc_ah;
+
+	ath9k_hw_disable_interrupts(ah);
+	ath9k_beaconq_config(sc);
+	ath9k_hw_beaconinit(ah, nexttbtt, intval);
+	ah->imask |= ATH9K_INT_SWBA;
+	sc->beacon.bmisscnt = 0;
+	ath9k_hw_set_interrupts(ah);
+	ath9k_hw_enable_interrupts(ah);
+}
+
+static void ath9k_beacon_stop(struct ath_softc *sc)
+{
+	ath9k_hw_disable_interrupts(sc->sc_ah);
+	sc->sc_ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
+	sc->beacon.bmisscnt = 0;
+	ath9k_hw_set_interrupts(sc->sc_ah);
+	ath9k_hw_enable_interrupts(sc->sc_ah);
+}
+
+/*
+ * For multi-bss ap support beacons are either staggered evenly over N slots or
+ * burst together.  For the former arrange for the SWBA to be delivered for each
+ * slot. Slots that are not occupied will generate nothing.
+ */
+static void ath9k_beacon_config_ap(struct ath_softc *sc,
+				   struct ath_beacon_config *conf)
+{
+	struct ath_hw *ah = sc->sc_ah;
+
+	ath9k_cmn_beacon_config_ap(ah, conf, ATH_BCBUF);
+	ath9k_beacon_init(sc, conf->nexttbtt, conf->intval);
+}
+
+static void ath9k_beacon_config_sta(struct ath_hw *ah,
+				    struct ath_beacon_config *conf)
+{
+	struct ath9k_beacon_state bs;
+
+	if (ath9k_cmn_beacon_config_sta(ah, conf, &bs) == -EPERM)
+		return;
+
+	ath9k_hw_disable_interrupts(ah);
+	ath9k_hw_set_sta_beacon_timers(ah, &bs);
+	ah->imask |= ATH9K_INT_BMISS;
+
+	ath9k_hw_set_interrupts(ah);
+	ath9k_hw_enable_interrupts(ah);
+}
+
+static void ath9k_beacon_config_adhoc(struct ath_softc *sc,
+				      struct ath_beacon_config *conf)
+{
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+
+	ath9k_reset_beacon_status(sc);
+
+	ath9k_cmn_beacon_config_adhoc(ah, conf);
+
+	ath9k_beacon_init(sc, conf->nexttbtt, conf->intval);
+
+	/*
+	 * Set the global 'beacon has been configured' flag for the
+	 * joiner case in IBSS mode.
+	 */
+	if (!conf->ibss_creator && conf->enable_beacon)
+		set_bit(ATH_OP_BEACONS, &common->op_flags);
+}
+
+static void ath9k_cache_beacon_config(struct ath_softc *sc,
+				      struct ath_chanctx *ctx,
+				      struct ieee80211_vif *vif)
+{
+	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_beacon_config *cur_conf = &ctx->beacon;
+
+	ath_dbg(common, BEACON,
+		"Caching beacon data for BSS: %pM\n", bss_conf->bssid);
+
+	cur_conf->beacon_interval = bss_conf->beacon_int;
+	cur_conf->dtim_period = bss_conf->dtim_period;
+	cur_conf->dtim_count = 1;
+	cur_conf->ibss_creator = vif->cfg.ibss_creator;
+
+	/*
+	 * It looks like mac80211 may end up using beacon interval of zero in
+	 * some cases (at least for mesh point). Avoid getting into an
+	 * infinite loop by using a bit safer value instead. To be safe,
+	 * do sanity check on beacon interval for all operating modes.
+	 */
+	if (cur_conf->beacon_interval == 0)
+		cur_conf->beacon_interval = 100;
+
+	cur_conf->bmiss_timeout =
+		ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
+
+	/*
+	 * We don't parse dtim period from mac80211 during the driver
+	 * initialization as it breaks association with hidden-ssid
+	 * AP and it causes latency in roaming
+	 */
+	if (cur_conf->dtim_period == 0)
+		cur_conf->dtim_period = 1;
+
+	ath9k_set_tsfadjust(sc, cur_conf);
+}
+
+void ath9k_beacon_config(struct ath_softc *sc, struct ieee80211_vif *main_vif,
+			 bool beacons)
+{
+	struct ath_hw *ah = sc->sc_ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	struct ath_vif *avp;
+	struct ath_chanctx *ctx;
+	struct ath_beacon_config *cur_conf;
+	unsigned long flags;
+	bool enabled;
+	bool skip_beacon = false;
+
+	if (!beacons) {
+		clear_bit(ATH_OP_BEACONS, &common->op_flags);
+		ath9k_beacon_stop(sc);
+		return;
+	}
+
+	if (WARN_ON(!main_vif))
+		return;
+
+	avp = (void *)main_vif->drv_priv;
+	ctx = avp->chanctx;
+	cur_conf = &ctx->beacon;
+	enabled = cur_conf->enable_beacon;
+	cur_conf->enable_beacon = beacons;
+
+	if (sc->sc_ah->opmode == NL80211_IFTYPE_STATION) {
+		ath9k_cache_beacon_config(sc, ctx, main_vif);
+
+		ath9k_set_beacon(sc);
+		set_bit(ATH_OP_BEACONS, &common->op_flags);
+		return;
+	}
+
+	/* Update the beacon configuration. */
+	ath9k_cache_beacon_config(sc, ctx, main_vif);
+
+	/*
+	 * Configure the HW beacon registers only when we have a valid
+	 * beacon interval.
+	 */
+	if (cur_conf->beacon_interval) {
+		/* Special case to sync the TSF when joining an existing IBSS.
+		 * This is only done if no AP interface is active.
+		 * Note that mac80211 always resets the TSF when creating a new
+		 * IBSS interface.
+		 */
+		if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC &&
+		    !enabled && beacons && !main_vif->cfg.ibss_creator) {
+			spin_lock_irqsave(&sc->sc_pm_lock, flags);
+			sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
+			spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+			skip_beacon = true;
+		}
+
+		/*
+		 * Do not set the ATH_OP_BEACONS flag for IBSS joiner mode
+		 * here, it is done in ath9k_beacon_config_adhoc().
+		 */
+		if (beacons && !skip_beacon) {
+			set_bit(ATH_OP_BEACONS, &common->op_flags);
+			ath9k_set_beacon(sc);
+		} else {
+			clear_bit(ATH_OP_BEACONS, &common->op_flags);
+			ath9k_beacon_stop(sc);
+		}
+	} else {
+		clear_bit(ATH_OP_BEACONS, &common->op_flags);
+		ath9k_beacon_stop(sc);
+	}
+}
+
+void ath9k_set_beacon(struct ath_softc *sc)
+{
+	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+	struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon;
+
+	switch (sc->sc_ah->opmode) {
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_MESH_POINT:
+		ath9k_beacon_config_ap(sc, cur_conf);
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		ath9k_beacon_config_adhoc(sc, cur_conf);
+		break;
+	case NL80211_IFTYPE_STATION:
+		ath9k_beacon_config_sta(sc->sc_ah, cur_conf);
+		break;
+	default:
+		ath_dbg(common, CONFIG, "Unsupported beaconing mode\n");
+		return;
+	}
+}