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, 513 insertions, 0 deletions

diff --git a/drivers/net/wireless/marvell/mwifiex/uap_txrx.c b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
new file mode 100644
index 000000000..e495f7eae
--- /dev/null
+++ b/drivers/net/wireless/marvell/mwifiex/uap_txrx.c
@@ -0,0 +1,513 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: AP TX and RX data handling
+ *
+ * Copyright 2011-2020 NXP
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n_aggr.h"
+#include "11n_rxreorder.h"
+
+/* This function checks if particular RA list has packets more than low bridge
+ * packet threshold and then deletes packet from this RA list.
+ * Function deletes packets from such RA list and returns true. If no such list
+ * is found, false is returned.
+ */
+static bool
+mwifiex_uap_del_tx_pkts_in_ralist(struct mwifiex_private *priv,
+				  struct list_head *ra_list_head,
+				  int tid)
+{
+	struct mwifiex_ra_list_tbl *ra_list;
+	struct sk_buff *skb, *tmp;
+	bool pkt_deleted = false;
+	struct mwifiex_txinfo *tx_info;
+	struct mwifiex_adapter *adapter = priv->adapter;
+
+	list_for_each_entry(ra_list, ra_list_head, list) {
+		if (skb_queue_empty(&ra_list->skb_head))
+			continue;
+
+		skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) {
+			tx_info = MWIFIEX_SKB_TXCB(skb);
+			if (tx_info->flags & MWIFIEX_BUF_FLAG_BRIDGED_PKT) {
+				__skb_unlink(skb, &ra_list->skb_head);
+				mwifiex_write_data_complete(adapter, skb, 0,
+							    -1);
+				if (ra_list->tx_paused)
+					priv->wmm.pkts_paused[tid]--;
+				else
+					atomic_dec(&priv->wmm.tx_pkts_queued);
+				pkt_deleted = true;
+			}
+			if ((atomic_read(&adapter->pending_bridged_pkts) <=
+					     MWIFIEX_BRIDGED_PKTS_THR_LOW))
+				break;
+		}
+	}
+
+	return pkt_deleted;
+}
+
+/* This function deletes packets from particular RA List. RA list index
+ * from which packets are deleted is preserved so that packets from next RA
+ * list are deleted upon subsequent call thus maintaining fairness.
+ */
+static void mwifiex_uap_cleanup_tx_queues(struct mwifiex_private *priv)
+{
+	struct list_head *ra_list;
+	int i;
+
+	spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+	for (i = 0; i < MAX_NUM_TID; i++, priv->del_list_idx++) {
+		if (priv->del_list_idx == MAX_NUM_TID)
+			priv->del_list_idx = 0;
+		ra_list = &priv->wmm.tid_tbl_ptr[priv->del_list_idx].ra_list;
+		if (mwifiex_uap_del_tx_pkts_in_ralist(priv, ra_list, i)) {
+			priv->del_list_idx++;
+			break;
+		}
+	}
+
+	spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+}
+
+
+static void mwifiex_uap_queue_bridged_pkt(struct mwifiex_private *priv,
+					 struct sk_buff *skb)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct uap_rxpd *uap_rx_pd;
+	struct rx_packet_hdr *rx_pkt_hdr;
+	struct sk_buff *new_skb;
+	struct mwifiex_txinfo *tx_info;
+	int hdr_chop;
+	struct ethhdr *p_ethhdr;
+	struct mwifiex_sta_node *src_node;
+	int index;
+
+	uap_rx_pd = (struct uap_rxpd *)(skb->data);
+	rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+
+	if ((atomic_read(&adapter->pending_bridged_pkts) >=
+					     MWIFIEX_BRIDGED_PKTS_THR_HIGH)) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "Tx: Bridge packet limit reached. Drop packet!\n");
+		kfree_skb(skb);
+		mwifiex_uap_cleanup_tx_queues(priv);
+		return;
+	}
+
+	if ((!memcmp(&rx_pkt_hdr->rfc1042_hdr, bridge_tunnel_header,
+		     sizeof(bridge_tunnel_header))) ||
+	    (!memcmp(&rx_pkt_hdr->rfc1042_hdr, rfc1042_header,
+		     sizeof(rfc1042_header)) &&
+	     ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_AARP &&
+	     ntohs(rx_pkt_hdr->rfc1042_hdr.snap_type) != ETH_P_IPX)) {
+		/* Replace the 803 header and rfc1042 header (llc/snap) with
+		 * an Ethernet II header, keep the src/dst and snap_type
+		 * (ethertype).
+		 *
+		 * The firmware only passes up SNAP frames converting all RX
+		 * data from 802.11 to 802.2/LLC/SNAP frames.
+		 *
+		 * To create the Ethernet II, just move the src, dst address
+		 * right before the snap_type.
+		 */
+		p_ethhdr = (struct ethhdr *)
+			((u8 *)(&rx_pkt_hdr->eth803_hdr)
+			 + sizeof(rx_pkt_hdr->eth803_hdr)
+			 + sizeof(rx_pkt_hdr->rfc1042_hdr)
+			 - sizeof(rx_pkt_hdr->eth803_hdr.h_dest)
+			 - sizeof(rx_pkt_hdr->eth803_hdr.h_source)
+			 - sizeof(rx_pkt_hdr->rfc1042_hdr.snap_type));
+		memcpy(p_ethhdr->h_source, rx_pkt_hdr->eth803_hdr.h_source,
+		       sizeof(p_ethhdr->h_source));
+		memcpy(p_ethhdr->h_dest, rx_pkt_hdr->eth803_hdr.h_dest,
+		       sizeof(p_ethhdr->h_dest));
+		/* Chop off the rxpd + the excess memory from
+		 * 802.2/llc/snap header that was removed.
+		 */
+		hdr_chop = (u8 *)p_ethhdr - (u8 *)uap_rx_pd;
+	} else {
+		/* Chop off the rxpd */
+		hdr_chop = (u8 *)&rx_pkt_hdr->eth803_hdr - (u8 *)uap_rx_pd;
+	}
+
+	/* Chop off the leading header bytes so that it points
+	 * to the start of either the reconstructed EthII frame
+	 * or the 802.2/llc/snap frame.
+	 */
+	skb_pull(skb, hdr_chop);
+
+	if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN) {
+		mwifiex_dbg(priv->adapter, ERROR,
+			    "data: Tx: insufficient skb headroom %d\n",
+			    skb_headroom(skb));
+		/* Insufficient skb headroom - allocate a new skb */
+		new_skb =
+			skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
+		if (unlikely(!new_skb)) {
+			mwifiex_dbg(priv->adapter, ERROR,
+				    "Tx: cannot allocate new_skb\n");
+			kfree_skb(skb);
+			priv->stats.tx_dropped++;
+			return;
+		}
+
+		kfree_skb(skb);
+		skb = new_skb;
+		mwifiex_dbg(priv->adapter, INFO,
+			    "info: new skb headroom %d\n",
+			    skb_headroom(skb));
+	}
+
+	tx_info = MWIFIEX_SKB_TXCB(skb);
+	memset(tx_info, 0, sizeof(*tx_info));
+	tx_info->bss_num = priv->bss_num;
+	tx_info->bss_type = priv->bss_type;
+	tx_info->flags |= MWIFIEX_BUF_FLAG_BRIDGED_PKT;
+
+	src_node = mwifiex_get_sta_entry(priv, rx_pkt_hdr->eth803_hdr.h_source);
+	if (src_node) {
+		src_node->stats.last_rx = jiffies;
+		src_node->stats.rx_bytes += skb->len;
+		src_node->stats.rx_packets++;
+		src_node->stats.last_tx_rate = uap_rx_pd->rx_rate;
+		src_node->stats.last_tx_htinfo = uap_rx_pd->ht_info;
+	}
+
+	if (is_unicast_ether_addr(rx_pkt_hdr->eth803_hdr.h_dest)) {
+		/* Update bridge packet statistics as the
+		 * packet is not going to kernel/upper layer.
+		 */
+		priv->stats.rx_bytes += skb->len;
+		priv->stats.rx_packets++;
+
+		/* Sending bridge packet to TX queue, so save the packet
+		 * length in TXCB to update statistics in TX complete.
+		 */
+		tx_info->pkt_len = skb->len;
+	}
+
+	__net_timestamp(skb);
+
+	index = mwifiex_1d_to_wmm_queue[skb->priority];
+	atomic_inc(&priv->wmm_tx_pending[index]);
+	mwifiex_wmm_add_buf_txqueue(priv, skb);
+	atomic_inc(&adapter->tx_pending);
+	atomic_inc(&adapter->pending_bridged_pkts);
+
+	mwifiex_queue_main_work(priv->adapter);
+
+	return;
+}
+
+/*
+ * This function contains logic for AP packet forwarding.
+ *
+ * If a packet is multicast/broadcast, it is sent to kernel/upper layer
+ * as well as queued back to AP TX queue so that it can be sent to other
+ * associated stations.
+ * If a packet is unicast and RA is present in associated station list,
+ * it is again requeued into AP TX queue.
+ * If a packet is unicast and RA is not in associated station list,
+ * packet is forwarded to kernel to handle routing logic.
+ */
+int mwifiex_handle_uap_rx_forward(struct mwifiex_private *priv,
+				  struct sk_buff *skb)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct uap_rxpd *uap_rx_pd;
+	struct rx_packet_hdr *rx_pkt_hdr;
+	u8 ra[ETH_ALEN];
+	struct sk_buff *skb_uap;
+
+	uap_rx_pd = (struct uap_rxpd *)(skb->data);
+	rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+
+	/* don't do packet forwarding in disconnected state */
+	if (!priv->media_connected) {
+		mwifiex_dbg(adapter, ERROR,
+			    "drop packet in disconnected state.\n");
+		dev_kfree_skb_any(skb);
+		return 0;
+	}
+
+	memcpy(ra, rx_pkt_hdr->eth803_hdr.h_dest, ETH_ALEN);
+
+	if (is_multicast_ether_addr(ra)) {
+		skb_uap = skb_copy(skb, GFP_ATOMIC);
+		mwifiex_uap_queue_bridged_pkt(priv, skb_uap);
+	} else {
+		if (mwifiex_get_sta_entry(priv, ra)) {
+			/* Requeue Intra-BSS packet */
+			mwifiex_uap_queue_bridged_pkt(priv, skb);
+			return 0;
+		}
+	}
+
+	/* Forward unicat/Inter-BSS packets to kernel. */
+	return mwifiex_process_rx_packet(priv, skb);
+}
+
+int mwifiex_uap_recv_packet(struct mwifiex_private *priv,
+			    struct sk_buff *skb)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct mwifiex_sta_node *src_node;
+	struct ethhdr *p_ethhdr;
+	struct sk_buff *skb_uap;
+	struct mwifiex_txinfo *tx_info;
+
+	if (!skb)
+		return -1;
+
+	p_ethhdr = (void *)skb->data;
+	src_node = mwifiex_get_sta_entry(priv, p_ethhdr->h_source);
+	if (src_node) {
+		src_node->stats.last_rx = jiffies;
+		src_node->stats.rx_bytes += skb->len;
+		src_node->stats.rx_packets++;
+	}
+
+	if (is_multicast_ether_addr(p_ethhdr->h_dest) ||
+	    mwifiex_get_sta_entry(priv, p_ethhdr->h_dest)) {
+		if (skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN)
+			skb_uap =
+			skb_realloc_headroom(skb, MWIFIEX_MIN_DATA_HEADER_LEN);
+		else
+			skb_uap = skb_copy(skb, GFP_ATOMIC);
+
+		if (likely(skb_uap)) {
+			tx_info = MWIFIEX_SKB_TXCB(skb_uap);
+			memset(tx_info, 0, sizeof(*tx_info));
+			tx_info->bss_num = priv->bss_num;
+			tx_info->bss_type = priv->bss_type;
+			tx_info->flags |= MWIFIEX_BUF_FLAG_BRIDGED_PKT;
+			__net_timestamp(skb_uap);
+			mwifiex_wmm_add_buf_txqueue(priv, skb_uap);
+			atomic_inc(&adapter->tx_pending);
+			atomic_inc(&adapter->pending_bridged_pkts);
+			if ((atomic_read(&adapter->pending_bridged_pkts) >=
+					MWIFIEX_BRIDGED_PKTS_THR_HIGH)) {
+				mwifiex_dbg(adapter, ERROR,
+					    "Tx: Bridge packet limit reached. Drop packet!\n");
+				mwifiex_uap_cleanup_tx_queues(priv);
+			}
+
+		} else {
+			mwifiex_dbg(adapter, ERROR, "failed to allocate skb_uap");
+		}
+
+		mwifiex_queue_main_work(adapter);
+		/* Don't forward Intra-BSS unicast packet to upper layer*/
+		if (mwifiex_get_sta_entry(priv, p_ethhdr->h_dest))
+			return 0;
+	}
+
+	skb->dev = priv->netdev;
+	skb->protocol = eth_type_trans(skb, priv->netdev);
+	skb->ip_summed = CHECKSUM_NONE;
+
+	/* This is required only in case of 11n and USB/PCIE as we alloc
+	 * a buffer of 4K only if its 11N (to be able to receive 4K
+	 * AMSDU packets). In case of SD we allocate buffers based
+	 * on the size of packet and hence this is not needed.
+	 *
+	 * Modifying the truesize here as our allocation for each
+	 * skb is 4K but we only receive 2K packets and this cause
+	 * the kernel to start dropping packets in case where
+	 * application has allocated buffer based on 2K size i.e.
+	 * if there a 64K packet received (in IP fragments and
+	 * application allocates 64K to receive this packet but
+	 * this packet would almost double up because we allocate
+	 * each 1.5K fragment in 4K and pass it up. As soon as the
+	 * 64K limit hits kernel will start to drop rest of the
+	 * fragments. Currently we fail the Filesndl-ht.scr script
+	 * for UDP, hence this fix
+	 */
+	if ((adapter->iface_type == MWIFIEX_USB ||
+	     adapter->iface_type == MWIFIEX_PCIE) &&
+	    skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE)
+		skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE);
+
+	/* Forward multicast/broadcast packet to upper layer*/
+	netif_rx(skb);
+	return 0;
+}
+
+/*
+ * This function processes the packet received on AP interface.
+ *
+ * The function looks into the RxPD and performs sanity tests on the
+ * received buffer to ensure its a valid packet before processing it
+ * further. If the packet is determined to be aggregated, it is
+ * de-aggregated accordingly. Then skb is passed to AP packet forwarding logic.
+ *
+ * The completion callback is called after processing is complete.
+ */
+int mwifiex_process_uap_rx_packet(struct mwifiex_private *priv,
+				  struct sk_buff *skb)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	int ret;
+	struct uap_rxpd *uap_rx_pd;
+	struct rx_packet_hdr *rx_pkt_hdr;
+	u16 rx_pkt_type;
+	u8 ta[ETH_ALEN], pkt_type;
+	struct mwifiex_sta_node *node;
+
+	uap_rx_pd = (struct uap_rxpd *)(skb->data);
+	rx_pkt_type = le16_to_cpu(uap_rx_pd->rx_pkt_type);
+	rx_pkt_hdr = (void *)uap_rx_pd + le16_to_cpu(uap_rx_pd->rx_pkt_offset);
+
+	ether_addr_copy(ta, rx_pkt_hdr->eth803_hdr.h_source);
+
+	if ((le16_to_cpu(uap_rx_pd->rx_pkt_offset) +
+	     le16_to_cpu(uap_rx_pd->rx_pkt_length)) > (u16) skb->len) {
+		mwifiex_dbg(adapter, ERROR,
+			    "wrong rx packet: len=%d, offset=%d, length=%d\n",
+			    skb->len, le16_to_cpu(uap_rx_pd->rx_pkt_offset),
+			    le16_to_cpu(uap_rx_pd->rx_pkt_length));
+		priv->stats.rx_dropped++;
+
+		node = mwifiex_get_sta_entry(priv, ta);
+		if (node)
+			node->stats.tx_failed++;
+
+		dev_kfree_skb_any(skb);
+		return 0;
+	}
+
+	if (rx_pkt_type == PKT_TYPE_MGMT) {
+		ret = mwifiex_process_mgmt_packet(priv, skb);
+		if (ret)
+			mwifiex_dbg(adapter, DATA, "Rx of mgmt packet failed");
+		dev_kfree_skb_any(skb);
+		return ret;
+	}
+
+
+	if (rx_pkt_type != PKT_TYPE_BAR && uap_rx_pd->priority < MAX_NUM_TID) {
+		spin_lock_bh(&priv->sta_list_spinlock);
+		node = mwifiex_get_sta_entry(priv, ta);
+		if (node)
+			node->rx_seq[uap_rx_pd->priority] =
+						le16_to_cpu(uap_rx_pd->seq_num);
+		spin_unlock_bh(&priv->sta_list_spinlock);
+	}
+
+	if (!priv->ap_11n_enabled ||
+	    (!mwifiex_11n_get_rx_reorder_tbl(priv, uap_rx_pd->priority, ta) &&
+	    (le16_to_cpu(uap_rx_pd->rx_pkt_type) != PKT_TYPE_AMSDU))) {
+		ret = mwifiex_handle_uap_rx_forward(priv, skb);
+		return ret;
+	}
+
+	/* Reorder and send to kernel */
+	pkt_type = (u8)le16_to_cpu(uap_rx_pd->rx_pkt_type);
+	ret = mwifiex_11n_rx_reorder_pkt(priv, le16_to_cpu(uap_rx_pd->seq_num),
+					 uap_rx_pd->priority, ta, pkt_type,
+					 skb);
+
+	if (ret || (rx_pkt_type == PKT_TYPE_BAR))
+		dev_kfree_skb_any(skb);
+
+	if (ret)
+		priv->stats.rx_dropped++;
+
+	return ret;
+}
+
+/*
+ * This function fills the TxPD for AP tx packets.
+ *
+ * The Tx buffer received by this function should already have the
+ * header space allocated for TxPD.
+ *
+ * This function inserts the TxPD in between interface header and actual
+ * data and adjusts the buffer pointers accordingly.
+ *
+ * The following TxPD fields are set by this function, as required -
+ *      - BSS number
+ *      - Tx packet length and offset
+ *      - Priority
+ *      - Packet delay
+ *      - Priority specific Tx control
+ *      - Flags
+ */
+void *mwifiex_process_uap_txpd(struct mwifiex_private *priv,
+			       struct sk_buff *skb)
+{
+	struct mwifiex_adapter *adapter = priv->adapter;
+	struct uap_txpd *txpd;
+	struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
+	int pad;
+	u16 pkt_type, pkt_offset;
+	int hroom = adapter->intf_hdr_len;
+
+	if (!skb->len) {
+		mwifiex_dbg(adapter, ERROR,
+			    "Tx: bad packet length: %d\n", skb->len);
+		tx_info->status_code = -1;
+		return skb->data;
+	}
+
+	BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN);
+
+	pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
+
+	pad = ((uintptr_t)skb->data - (sizeof(*txpd) + hroom)) &
+	       (MWIFIEX_DMA_ALIGN_SZ - 1);
+
+	skb_push(skb, sizeof(*txpd) + pad);
+
+	txpd = (struct uap_txpd *)skb->data;
+	memset(txpd, 0, sizeof(*txpd));
+	txpd->bss_num = priv->bss_num;
+	txpd->bss_type = priv->bss_type;
+	txpd->tx_pkt_length = cpu_to_le16((u16)(skb->len - (sizeof(*txpd) +
+						pad)));
+	txpd->priority = (u8)skb->priority;
+
+	txpd->pkt_delay_2ms = mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
+
+	if (tx_info->flags & MWIFIEX_BUF_FLAG_EAPOL_TX_STATUS ||
+	    tx_info->flags & MWIFIEX_BUF_FLAG_ACTION_TX_STATUS) {
+		txpd->tx_token_id = tx_info->ack_frame_id;
+		txpd->flags |= MWIFIEX_TXPD_FLAGS_REQ_TX_STATUS;
+	}
+
+	if (txpd->priority < ARRAY_SIZE(priv->wmm.user_pri_pkt_tx_ctrl))
+		/*
+		 * Set the priority specific tx_control field, setting of 0 will
+		 * cause the default value to be used later in this function.
+		 */
+		txpd->tx_control =
+		    cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[txpd->priority]);
+
+	/* Offset of actual data */
+	pkt_offset = sizeof(*txpd) + pad;
+	if (pkt_type == PKT_TYPE_MGMT) {
+		/* Set the packet type and add header for management frame */
+		txpd->tx_pkt_type = cpu_to_le16(pkt_type);
+		pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
+	}
+
+	txpd->tx_pkt_offset = cpu_to_le16(pkt_offset);
+
+	/* make space for adapter->intf_hdr_len */
+	skb_push(skb, hroom);
+
+	if (!txpd->tx_control)
+		/* TxCtrl set by user or default */
+		txpd->tx_control = cpu_to_le32(priv->pkt_tx_ctrl);
+
+	return skb->data;
+}