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, 1009 insertions, 0 deletions

diff --git a/drivers/staging/wlan-ng/p80211netdev.c b/drivers/staging/wlan-ng/p80211netdev.c
new file mode 100644
index 000000000..6bef419e8
--- /dev/null
+++ b/drivers/staging/wlan-ng/p80211netdev.c
@@ -0,0 +1,1009 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MPL-1.1)
+/*
+ *
+ * Linux Kernel net device interface
+ *
+ * Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
+ * --------------------------------------------------------------------
+ *
+ * linux-wlan
+ *
+ *   The contents of this file are subject to the Mozilla Public
+ *   License Version 1.1 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.mozilla.org/MPL/
+ *
+ *   Software distributed under the License is distributed on an "AS
+ *   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
+ *   implied. See the License for the specific language governing
+ *   rights and limitations under the License.
+ *
+ *   Alternatively, the contents of this file may be used under the
+ *   terms of the GNU Public License version 2 (the "GPL"), in which
+ *   case the provisions of the GPL are applicable instead of the
+ *   above.  If you wish to allow the use of your version of this file
+ *   only under the terms of the GPL and not to allow others to use
+ *   your version of this file under the MPL, indicate your decision
+ *   by deleting the provisions above and replace them with the notice
+ *   and other provisions required by the GPL.  If you do not delete
+ *   the provisions above, a recipient may use your version of this
+ *   file under either the MPL or the GPL.
+ *
+ * --------------------------------------------------------------------
+ *
+ * Inquiries regarding the linux-wlan Open Source project can be
+ * made directly to:
+ *
+ * AbsoluteValue Systems Inc.
+ * info@linux-wlan.com
+ * http://www.linux-wlan.com
+ *
+ * --------------------------------------------------------------------
+ *
+ * Portions of the development of this software were funded by
+ * Intersil Corporation as part of PRISM(R) chipset product development.
+ *
+ * --------------------------------------------------------------------
+ *
+ * The functions required for a Linux network device are defined here.
+ *
+ * --------------------------------------------------------------------
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/proc_fs.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/kmod.h>
+#include <linux/if_arp.h>
+#include <linux/wireless.h>
+#include <linux/sockios.h>
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/byteorder/generic.h>
+#include <linux/bitops.h>
+#include <linux/uaccess.h>
+#include <asm/byteorder.h>
+
+#ifdef SIOCETHTOOL
+#include <linux/ethtool.h>
+#endif
+
+#include <net/iw_handler.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+
+#include "p80211types.h"
+#include "p80211hdr.h"
+#include "p80211conv.h"
+#include "p80211mgmt.h"
+#include "p80211msg.h"
+#include "p80211netdev.h"
+#include "p80211ioctl.h"
+#include "p80211req.h"
+#include "p80211metastruct.h"
+#include "p80211metadef.h"
+
+#include "cfg80211.c"
+
+/* netdevice method functions */
+static int p80211knetdev_init(struct net_device *netdev);
+static int p80211knetdev_open(struct net_device *netdev);
+static int p80211knetdev_stop(struct net_device *netdev);
+static netdev_tx_t p80211knetdev_hard_start_xmit(struct sk_buff *skb,
+						 struct net_device *netdev);
+static void p80211knetdev_set_multicast_list(struct net_device *dev);
+static int p80211knetdev_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+					void __user *data, int cmd);
+static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr);
+static void p80211knetdev_tx_timeout(struct net_device *netdev, unsigned int txqueue);
+static int p80211_rx_typedrop(struct wlandevice *wlandev, u16 fc);
+
+int wlan_watchdog = 5000;
+module_param(wlan_watchdog, int, 0644);
+MODULE_PARM_DESC(wlan_watchdog, "transmit timeout in milliseconds");
+
+int wlan_wext_write = 1;
+module_param(wlan_wext_write, int, 0644);
+MODULE_PARM_DESC(wlan_wext_write, "enable write wireless extensions");
+
+/*----------------------------------------------------------------
+ * p80211knetdev_init
+ *
+ * Init method for a Linux netdevice.  Called in response to
+ * register_netdev.
+ *
+ * Arguments:
+ *	none
+ *
+ * Returns:
+ *	nothing
+ *----------------------------------------------------------------
+ */
+static int p80211knetdev_init(struct net_device *netdev)
+{
+	/* Called in response to register_netdev */
+	/* This is usually the probe function, but the probe has */
+	/* already been done by the MSD and the create_kdev */
+	/* function.  All we do here is return success */
+	return 0;
+}
+
+/*----------------------------------------------------------------
+ * p80211knetdev_open
+ *
+ * Linux netdevice open method.  Following a successful call here,
+ * the device is supposed to be ready for tx and rx.  In our
+ * situation that may not be entirely true due to the state of the
+ * MAC below.
+ *
+ * Arguments:
+ *	netdev		Linux network device structure
+ *
+ * Returns:
+ *	zero on success, non-zero otherwise
+ *----------------------------------------------------------------
+ */
+static int p80211knetdev_open(struct net_device *netdev)
+{
+	int result = 0;		/* success */
+	struct wlandevice *wlandev = netdev->ml_priv;
+
+	/* Check to make sure the MSD is running */
+	if (wlandev->msdstate != WLAN_MSD_RUNNING)
+		return -ENODEV;
+
+	/* Tell the MSD to open */
+	if (wlandev->open) {
+		result = wlandev->open(wlandev);
+		if (result == 0) {
+			netif_start_queue(wlandev->netdev);
+			wlandev->state = WLAN_DEVICE_OPEN;
+		}
+	} else {
+		result = -EAGAIN;
+	}
+
+	return result;
+}
+
+/*----------------------------------------------------------------
+ * p80211knetdev_stop
+ *
+ * Linux netdevice stop (close) method.  Following this call,
+ * no frames should go up or down through this interface.
+ *
+ * Arguments:
+ *	netdev		Linux network device structure
+ *
+ * Returns:
+ *	zero on success, non-zero otherwise
+ *----------------------------------------------------------------
+ */
+static int p80211knetdev_stop(struct net_device *netdev)
+{
+	int result = 0;
+	struct wlandevice *wlandev = netdev->ml_priv;
+
+	if (wlandev->close)
+		result = wlandev->close(wlandev);
+
+	netif_stop_queue(wlandev->netdev);
+	wlandev->state = WLAN_DEVICE_CLOSED;
+
+	return result;
+}
+
+/*----------------------------------------------------------------
+ * p80211netdev_rx
+ *
+ * Frame receive function called by the mac specific driver.
+ *
+ * Arguments:
+ *	wlandev		WLAN network device structure
+ *	skb		skbuff containing a full 802.11 frame.
+ * Returns:
+ *	nothing
+ * Side effects:
+ *
+ *----------------------------------------------------------------
+ */
+void p80211netdev_rx(struct wlandevice *wlandev, struct sk_buff *skb)
+{
+	/* Enqueue for post-irq processing */
+	skb_queue_tail(&wlandev->nsd_rxq, skb);
+	tasklet_schedule(&wlandev->rx_bh);
+}
+
+#define CONV_TO_ETHER_SKIPPED	0x01
+#define CONV_TO_ETHER_FAILED	0x02
+
+/**
+ * p80211_convert_to_ether - conversion from 802.11 frame to ethernet frame
+ * @wlandev: pointer to WLAN device
+ * @skb: pointer to socket buffer
+ *
+ * Returns: 0 if conversion succeeded
+ *	    CONV_TO_ETHER_FAILED if conversion failed
+ *	    CONV_TO_ETHER_SKIPPED if frame is ignored
+ */
+static int p80211_convert_to_ether(struct wlandevice *wlandev,
+				   struct sk_buff *skb)
+{
+	struct p80211_hdr *hdr;
+
+	hdr = (struct p80211_hdr *)skb->data;
+	if (p80211_rx_typedrop(wlandev, le16_to_cpu(hdr->frame_control)))
+		return CONV_TO_ETHER_SKIPPED;
+
+	/* perform mcast filtering: allow my local address through but reject
+	 * anything else that isn't multicast
+	 */
+	if (wlandev->netdev->flags & IFF_ALLMULTI) {
+		if (!ether_addr_equal_unaligned(wlandev->netdev->dev_addr,
+						hdr->address1)) {
+			if (!is_multicast_ether_addr(hdr->address1))
+				return CONV_TO_ETHER_SKIPPED;
+		}
+	}
+
+	if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) {
+		wlandev->netdev->stats.rx_packets++;
+		wlandev->netdev->stats.rx_bytes += skb->len;
+		netif_rx(skb);
+		return 0;
+	}
+
+	netdev_dbg(wlandev->netdev, "%s failed.\n", __func__);
+	return CONV_TO_ETHER_FAILED;
+}
+
+/**
+ * p80211netdev_rx_bh - deferred processing of all received frames
+ *
+ * @t: pointer to the tasklet associated with this handler
+ */
+static void p80211netdev_rx_bh(struct tasklet_struct *t)
+{
+	struct wlandevice *wlandev = from_tasklet(wlandev, t, rx_bh);
+	struct sk_buff *skb = NULL;
+	struct net_device *dev = wlandev->netdev;
+
+	/* Let's empty our queue */
+	while ((skb = skb_dequeue(&wlandev->nsd_rxq))) {
+		if (wlandev->state == WLAN_DEVICE_OPEN) {
+			if (dev->type != ARPHRD_ETHER) {
+				/* RAW frame; we shouldn't convert it */
+				/* XXX Append the Prism Header here instead. */
+
+				/* set up various data fields */
+				skb->dev = dev;
+				skb_reset_mac_header(skb);
+				skb->ip_summed = CHECKSUM_NONE;
+				skb->pkt_type = PACKET_OTHERHOST;
+				skb->protocol = htons(ETH_P_80211_RAW);
+
+				dev->stats.rx_packets++;
+				dev->stats.rx_bytes += skb->len;
+				netif_rx(skb);
+				continue;
+			} else {
+				if (!p80211_convert_to_ether(wlandev, skb))
+					continue;
+			}
+		}
+		dev_kfree_skb(skb);
+	}
+}
+
+/*----------------------------------------------------------------
+ * p80211knetdev_hard_start_xmit
+ *
+ * Linux netdevice method for transmitting a frame.
+ *
+ * Arguments:
+ *	skb	Linux sk_buff containing the frame.
+ *	netdev	Linux netdevice.
+ *
+ * Side effects:
+ *	If the lower layers report that buffers are full. netdev->tbusy
+ *	will be set to prevent higher layers from sending more traffic.
+ *
+ *	Note: If this function returns non-zero, higher layers retain
+ *	      ownership of the skb.
+ *
+ * Returns:
+ *	zero on success, non-zero on failure.
+ *----------------------------------------------------------------
+ */
+static netdev_tx_t p80211knetdev_hard_start_xmit(struct sk_buff *skb,
+						 struct net_device *netdev)
+{
+	int result = 0;
+	int txresult;
+	struct wlandevice *wlandev = netdev->ml_priv;
+	struct p80211_hdr p80211_hdr;
+	struct p80211_metawep p80211_wep;
+
+	p80211_wep.data = NULL;
+
+	if (!skb)
+		return NETDEV_TX_OK;
+
+	if (wlandev->state != WLAN_DEVICE_OPEN) {
+		result = 1;
+		goto failed;
+	}
+
+	memset(&p80211_hdr, 0, sizeof(p80211_hdr));
+	memset(&p80211_wep, 0, sizeof(p80211_wep));
+
+	if (netif_queue_stopped(netdev)) {
+		netdev_dbg(netdev, "called when queue stopped.\n");
+		result = 1;
+		goto failed;
+	}
+
+	netif_stop_queue(netdev);
+
+	/* Check to see that a valid mode is set */
+	switch (wlandev->macmode) {
+	case WLAN_MACMODE_IBSS_STA:
+	case WLAN_MACMODE_ESS_STA:
+	case WLAN_MACMODE_ESS_AP:
+		break;
+	default:
+		/* Mode isn't set yet, just drop the frame
+		 * and return success .
+		 * TODO: we need a saner way to handle this
+		 */
+		if (be16_to_cpu(skb->protocol) != ETH_P_80211_RAW) {
+			netif_start_queue(wlandev->netdev);
+			netdev_notice(netdev, "Tx attempt prior to association, frame dropped.\n");
+			netdev->stats.tx_dropped++;
+			result = 0;
+			goto failed;
+		}
+		break;
+	}
+
+	/* Check for raw transmits */
+	if (be16_to_cpu(skb->protocol) == ETH_P_80211_RAW) {
+		if (!capable(CAP_NET_ADMIN)) {
+			result = 1;
+			goto failed;
+		}
+		/* move the header over */
+		memcpy(&p80211_hdr, skb->data, sizeof(p80211_hdr));
+		skb_pull(skb, sizeof(p80211_hdr));
+	} else {
+		if (skb_ether_to_p80211
+		    (wlandev, wlandev->ethconv, skb, &p80211_hdr,
+		     &p80211_wep) != 0) {
+			/* convert failed */
+			netdev_dbg(netdev, "ether_to_80211(%d) failed.\n",
+				   wlandev->ethconv);
+			result = 1;
+			goto failed;
+		}
+	}
+	if (!wlandev->txframe) {
+		result = 1;
+		goto failed;
+	}
+
+	netif_trans_update(netdev);
+
+	netdev->stats.tx_packets++;
+	/* count only the packet payload */
+	netdev->stats.tx_bytes += skb->len;
+
+	txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep);
+
+	if (txresult == 0) {
+		/* success and more buf */
+		/* avail, re: hw_txdata */
+		netif_wake_queue(wlandev->netdev);
+		result = NETDEV_TX_OK;
+	} else if (txresult == 1) {
+		/* success, no more avail */
+		netdev_dbg(netdev, "txframe success, no more bufs\n");
+		/* netdev->tbusy = 1;  don't set here, irqhdlr */
+		/*   may have already cleared it */
+		result = NETDEV_TX_OK;
+	} else if (txresult == 2) {
+		/* alloc failure, drop frame */
+		netdev_dbg(netdev, "txframe returned alloc_fail\n");
+		result = NETDEV_TX_BUSY;
+	} else {
+		/* buffer full or queue busy, drop frame. */
+		netdev_dbg(netdev, "txframe returned full or busy\n");
+		result = NETDEV_TX_BUSY;
+	}
+
+failed:
+	/* Free up the WEP buffer if it's not the same as the skb */
+	if ((p80211_wep.data) && (p80211_wep.data != skb->data))
+		kfree_sensitive(p80211_wep.data);
+
+	/* we always free the skb here, never in a lower level. */
+	if (!result)
+		dev_kfree_skb(skb);
+
+	return result;
+}
+
+/*----------------------------------------------------------------
+ * p80211knetdev_set_multicast_list
+ *
+ * Called from higher layers whenever there's a need to set/clear
+ * promiscuous mode or rewrite the multicast list.
+ *
+ * Arguments:
+ *	none
+ *
+ * Returns:
+ *	nothing
+ *----------------------------------------------------------------
+ */
+static void p80211knetdev_set_multicast_list(struct net_device *dev)
+{
+	struct wlandevice *wlandev = dev->ml_priv;
+
+	/* TODO:  real multicast support as well */
+
+	if (wlandev->set_multicast_list)
+		wlandev->set_multicast_list(wlandev, dev);
+}
+
+/*----------------------------------------------------------------
+ * p80211knetdev_siocdevprivate
+ *
+ * Handle an ioctl call on one of our devices.  Everything Linux
+ * ioctl specific is done here.  Then we pass the contents of the
+ * ifr->data to the request message handler.
+ *
+ * Arguments:
+ *	dev	Linux kernel netdevice
+ *	ifr	Our private ioctl request structure, typed for the
+ *		generic struct ifreq so we can use ptr to func
+ *		w/o cast.
+ *
+ * Returns:
+ *	zero on success, a negative errno on failure.  Possible values:
+ *		-ENETDOWN Device isn't up.
+ *		-EBUSY	cmd already in progress
+ *		-ETIME	p80211 cmd timed out (MSD may have its own timers)
+ *		-EFAULT memory fault copying msg from user buffer
+ *		-ENOMEM unable to allocate kernel msg buffer
+ *		-EINVAL	bad magic, it the cmd really for us?
+ *		-EintR	sleeping on cmd, awakened by signal, cmd cancelled.
+ *
+ * Call Context:
+ *	Process thread (ioctl caller).  TODO: SMP support may require
+ *	locks.
+ *----------------------------------------------------------------
+ */
+static int p80211knetdev_siocdevprivate(struct net_device *dev,
+					struct ifreq *ifr,
+					void __user *data, int cmd)
+{
+	int result = 0;
+	struct p80211ioctl_req *req = (struct p80211ioctl_req *)ifr;
+	struct wlandevice *wlandev = dev->ml_priv;
+	u8 *msgbuf;
+
+	netdev_dbg(dev, "rx'd ioctl, cmd=%d, len=%d\n", cmd, req->len);
+
+	if (in_compat_syscall())
+		return -EOPNOTSUPP;
+
+	/* Test the magic, assume ifr is good if it's there */
+	if (req->magic != P80211_IOCTL_MAGIC) {
+		result = -EINVAL;
+		goto bail;
+	}
+
+	if (cmd == P80211_IFTEST) {
+		result = 0;
+		goto bail;
+	} else if (cmd != P80211_IFREQ) {
+		result = -EINVAL;
+		goto bail;
+	}
+
+	msgbuf = memdup_user(data, req->len);
+	if (IS_ERR(msgbuf)) {
+		result = PTR_ERR(msgbuf);
+		goto bail;
+	}
+
+	result = p80211req_dorequest(wlandev, msgbuf);
+
+	if (result == 0) {
+		if (copy_to_user(data, msgbuf, req->len))
+			result = -EFAULT;
+	}
+	kfree(msgbuf);
+
+bail:
+	/* If allocate,copyfrom or copyto fails, return errno */
+	return result;
+}
+
+/*----------------------------------------------------------------
+ * p80211knetdev_set_mac_address
+ *
+ * Handles the ioctl for changing the MACAddress of a netdevice
+ *
+ * references: linux/netdevice.h and drivers/net/net_init.c
+ *
+ * NOTE: [MSM] We only prevent address changes when the netdev is
+ * up.  We don't control anything based on dot11 state.  If the
+ * address is changed on a STA that's currently associated, you
+ * will probably lose the ability to send and receive data frames.
+ * Just be aware.  Therefore, this should usually only be done
+ * prior to scan/join/auth/assoc.
+ *
+ * Arguments:
+ *	dev	netdevice struct
+ *	addr	the new MACAddress (a struct)
+ *
+ * Returns:
+ *	zero on success, a negative errno on failure.  Possible values:
+ *		-EBUSY	device is bussy (cmd not possible)
+ *		-and errors returned by: p80211req_dorequest(..)
+ *
+ * by: Collin R. Mulliner <collin@mulliner.org>
+ *----------------------------------------------------------------
+ */
+static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr)
+{
+	struct sockaddr *new_addr = addr;
+	struct p80211msg_dot11req_mibset dot11req;
+	struct p80211item_unk392 *mibattr;
+	struct p80211item_pstr6 *macaddr;
+	struct p80211item_uint32 *resultcode;
+	int result;
+
+	/* If we're running, we don't allow MAC address changes */
+	if (netif_running(dev))
+		return -EBUSY;
+
+	/* Set up some convenience pointers. */
+	mibattr = &dot11req.mibattribute;
+	macaddr = (struct p80211item_pstr6 *)&mibattr->data;
+	resultcode = &dot11req.resultcode;
+
+	/* Set up a dot11req_mibset */
+	memset(&dot11req, 0, sizeof(dot11req));
+	dot11req.msgcode = DIDMSG_DOT11REQ_MIBSET;
+	dot11req.msglen = sizeof(dot11req);
+	memcpy(dot11req.devname,
+	       ((struct wlandevice *)dev->ml_priv)->name,
+	       WLAN_DEVNAMELEN_MAX - 1);
+
+	/* Set up the mibattribute argument */
+	mibattr->did = DIDMSG_DOT11REQ_MIBSET_MIBATTRIBUTE;
+	mibattr->status = P80211ENUM_msgitem_status_data_ok;
+	mibattr->len = sizeof(mibattr->data);
+
+	macaddr->did = DIDMIB_DOT11MAC_OPERATIONTABLE_MACADDRESS;
+	macaddr->status = P80211ENUM_msgitem_status_data_ok;
+	macaddr->len = sizeof(macaddr->data);
+	macaddr->data.len = ETH_ALEN;
+	memcpy(&macaddr->data.data, new_addr->sa_data, ETH_ALEN);
+
+	/* Set up the resultcode argument */
+	resultcode->did = DIDMSG_DOT11REQ_MIBSET_RESULTCODE;
+	resultcode->status = P80211ENUM_msgitem_status_no_value;
+	resultcode->len = sizeof(resultcode->data);
+	resultcode->data = 0;
+
+	/* now fire the request */
+	result = p80211req_dorequest(dev->ml_priv, (u8 *)&dot11req);
+
+	/* If the request wasn't successful, report an error and don't
+	 * change the netdev address
+	 */
+	if (result != 0 || resultcode->data != P80211ENUM_resultcode_success) {
+		netdev_err(dev, "Low-level driver failed dot11req_mibset(dot11MACAddress).\n");
+		result = -EADDRNOTAVAIL;
+	} else {
+		/* everything's ok, change the addr in netdev */
+		eth_hw_addr_set(dev, new_addr->sa_data);
+	}
+
+	return result;
+}
+
+static const struct net_device_ops p80211_netdev_ops = {
+	.ndo_init = p80211knetdev_init,
+	.ndo_open = p80211knetdev_open,
+	.ndo_stop = p80211knetdev_stop,
+	.ndo_start_xmit = p80211knetdev_hard_start_xmit,
+	.ndo_set_rx_mode = p80211knetdev_set_multicast_list,
+	.ndo_siocdevprivate = p80211knetdev_siocdevprivate,
+	.ndo_set_mac_address = p80211knetdev_set_mac_address,
+	.ndo_tx_timeout = p80211knetdev_tx_timeout,
+	.ndo_validate_addr = eth_validate_addr,
+};
+
+/*----------------------------------------------------------------
+ * wlan_setup
+ *
+ * Roughly matches the functionality of ether_setup.  Here
+ * we set up any members of the wlandevice structure that are common
+ * to all devices.  Additionally, we allocate a linux 'struct device'
+ * and perform the same setup as ether_setup.
+ *
+ * Note: It's important that the caller have setup the wlandev->name
+ *	ptr prior to calling this function.
+ *
+ * Arguments:
+ *	wlandev		ptr to the wlandev structure for the
+ *			interface.
+ *	physdev		ptr to usb device
+ * Returns:
+ *	zero on success, non-zero otherwise.
+ * Call Context:
+ *	Should be process thread.  We'll assume it might be
+ *	interrupt though.  When we add support for statically
+ *	compiled drivers, this function will be called in the
+ *	context of the kernel startup code.
+ *----------------------------------------------------------------
+ */
+int wlan_setup(struct wlandevice *wlandev, struct device *physdev)
+{
+	int result = 0;
+	struct net_device *netdev;
+	struct wiphy *wiphy;
+	struct wireless_dev *wdev;
+
+	/* Set up the wlandev */
+	wlandev->state = WLAN_DEVICE_CLOSED;
+	wlandev->ethconv = WLAN_ETHCONV_8021h;
+	wlandev->macmode = WLAN_MACMODE_NONE;
+
+	/* Set up the rx queue */
+	skb_queue_head_init(&wlandev->nsd_rxq);
+	tasklet_setup(&wlandev->rx_bh, p80211netdev_rx_bh);
+
+	/* Allocate and initialize the wiphy struct */
+	wiphy = wlan_create_wiphy(physdev, wlandev);
+	if (!wiphy) {
+		dev_err(physdev, "Failed to alloc wiphy.\n");
+		return 1;
+	}
+
+	/* Allocate and initialize the struct device */
+	netdev = alloc_netdev(sizeof(struct wireless_dev), "wlan%d",
+			      NET_NAME_UNKNOWN, ether_setup);
+	if (!netdev) {
+		dev_err(physdev, "Failed to alloc netdev.\n");
+		wlan_free_wiphy(wiphy);
+		result = 1;
+	} else {
+		wlandev->netdev = netdev;
+		netdev->ml_priv = wlandev;
+		netdev->netdev_ops = &p80211_netdev_ops;
+		wdev = netdev_priv(netdev);
+		wdev->wiphy = wiphy;
+		wdev->iftype = NL80211_IFTYPE_STATION;
+		netdev->ieee80211_ptr = wdev;
+		netdev->min_mtu = 68;
+		/* 2312 is max 802.11 payload, 20 is overhead,
+		 * (ether + llc + snap) and another 8 for wep.
+		 */
+		netdev->max_mtu = (2312 - 20 - 8);
+
+		netif_stop_queue(netdev);
+		netif_carrier_off(netdev);
+	}
+
+	return result;
+}
+
+/*----------------------------------------------------------------
+ * wlan_unsetup
+ *
+ * This function is paired with the wlan_setup routine.  It should
+ * be called after unregister_wlandev.  Basically, all it does is
+ * free the 'struct device' that's associated with the wlandev.
+ * We do it here because the 'struct device' isn't allocated
+ * explicitly in the driver code, it's done in wlan_setup.  To
+ * do the free in the driver might seem like 'magic'.
+ *
+ * Arguments:
+ *	wlandev		ptr to the wlandev structure for the
+ *			interface.
+ * Call Context:
+ *	Should be process thread.  We'll assume it might be
+ *	interrupt though.  When we add support for statically
+ *	compiled drivers, this function will be called in the
+ *	context of the kernel startup code.
+ *----------------------------------------------------------------
+ */
+void wlan_unsetup(struct wlandevice *wlandev)
+{
+	struct wireless_dev *wdev;
+
+	tasklet_kill(&wlandev->rx_bh);
+
+	if (wlandev->netdev) {
+		wdev = netdev_priv(wlandev->netdev);
+		if (wdev->wiphy)
+			wlan_free_wiphy(wdev->wiphy);
+		free_netdev(wlandev->netdev);
+		wlandev->netdev = NULL;
+	}
+}
+
+/*----------------------------------------------------------------
+ * register_wlandev
+ *
+ * Roughly matches the functionality of register_netdev.  This function
+ * is called after the driver has successfully probed and set up the
+ * resources for the device.  It's now ready to become a named device
+ * in the Linux system.
+ *
+ * First we allocate a name for the device (if not already set), then
+ * we call the Linux function register_netdevice.
+ *
+ * Arguments:
+ *	wlandev		ptr to the wlandev structure for the
+ *			interface.
+ * Returns:
+ *	zero on success, non-zero otherwise.
+ * Call Context:
+ *	Can be either interrupt or not.
+ *----------------------------------------------------------------
+ */
+int register_wlandev(struct wlandevice *wlandev)
+{
+	return register_netdev(wlandev->netdev);
+}
+
+/*----------------------------------------------------------------
+ * unregister_wlandev
+ *
+ * Roughly matches the functionality of unregister_netdev.  This
+ * function is called to remove a named device from the system.
+ *
+ * First we tell linux that the device should no longer exist.
+ * Then we remove it from the list of known wlan devices.
+ *
+ * Arguments:
+ *	wlandev		ptr to the wlandev structure for the
+ *			interface.
+ * Returns:
+ *	zero on success, non-zero otherwise.
+ * Call Context:
+ *	Can be either interrupt or not.
+ *----------------------------------------------------------------
+ */
+int unregister_wlandev(struct wlandevice *wlandev)
+{
+	struct sk_buff *skb;
+
+	unregister_netdev(wlandev->netdev);
+
+	/* Now to clean out the rx queue */
+	while ((skb = skb_dequeue(&wlandev->nsd_rxq)))
+		dev_kfree_skb(skb);
+
+	return 0;
+}
+
+/*----------------------------------------------------------------
+ * p80211netdev_hwremoved
+ *
+ * Hardware removed notification. This function should be called
+ * immediately after an MSD has detected that the underlying hardware
+ * has been yanked out from under us.  The primary things we need
+ * to do are:
+ *   - Mark the wlandev
+ *   - Prevent any further traffic from the knetdev i/f
+ *   - Prevent any further requests from mgmt i/f
+ *   - If there are any waitq'd mgmt requests or mgmt-frame exchanges,
+ *     shut them down.
+ *   - Call the MSD hwremoved function.
+ *
+ * The remainder of the cleanup will be handled by unregister().
+ * Our primary goal here is to prevent as much tickling of the MSD
+ * as possible since the MSD is already in a 'wounded' state.
+ *
+ * TODO: As new features are added, this function should be
+ *       updated.
+ *
+ * Arguments:
+ *	wlandev		WLAN network device structure
+ * Returns:
+ *	nothing
+ * Side effects:
+ *
+ * Call context:
+ *	Usually interrupt.
+ *----------------------------------------------------------------
+ */
+void p80211netdev_hwremoved(struct wlandevice *wlandev)
+{
+	wlandev->hwremoved = 1;
+	if (wlandev->state == WLAN_DEVICE_OPEN)
+		netif_stop_queue(wlandev->netdev);
+
+	netif_device_detach(wlandev->netdev);
+}
+
+/*----------------------------------------------------------------
+ * p80211_rx_typedrop
+ *
+ * Classifies the frame, increments the appropriate counter, and
+ * returns 0|1|2 indicating whether the driver should handle, ignore, or
+ * drop the frame
+ *
+ * Arguments:
+ *	wlandev		wlan device structure
+ *	fc		frame control field
+ *
+ * Returns:
+ *	zero if the frame should be handled by the driver,
+ *       one if the frame should be ignored
+ *       anything else means we drop it.
+ *
+ * Side effects:
+ *
+ * Call context:
+ *	interrupt
+ *----------------------------------------------------------------
+ */
+static int p80211_rx_typedrop(struct wlandevice *wlandev, u16 fc)
+{
+	u16 ftype;
+	u16 fstype;
+	int drop = 0;
+	/* Classify frame, increment counter */
+	ftype = WLAN_GET_FC_FTYPE(fc);
+	fstype = WLAN_GET_FC_FSTYPE(fc);
+	switch (ftype) {
+	case WLAN_FTYPE_MGMT:
+		if ((wlandev->netdev->flags & IFF_PROMISC) ||
+		    (wlandev->netdev->flags & IFF_ALLMULTI)) {
+			drop = 1;
+			break;
+		}
+		netdev_dbg(wlandev->netdev, "rx'd mgmt:\n");
+		wlandev->rx.mgmt++;
+		switch (fstype) {
+		case WLAN_FSTYPE_ASSOCREQ:
+			wlandev->rx.assocreq++;
+			break;
+		case WLAN_FSTYPE_ASSOCRESP:
+			wlandev->rx.assocresp++;
+			break;
+		case WLAN_FSTYPE_REASSOCREQ:
+			wlandev->rx.reassocreq++;
+			break;
+		case WLAN_FSTYPE_REASSOCRESP:
+			wlandev->rx.reassocresp++;
+			break;
+		case WLAN_FSTYPE_PROBEREQ:
+			wlandev->rx.probereq++;
+			break;
+		case WLAN_FSTYPE_PROBERESP:
+			wlandev->rx.proberesp++;
+			break;
+		case WLAN_FSTYPE_BEACON:
+			wlandev->rx.beacon++;
+			break;
+		case WLAN_FSTYPE_ATIM:
+			wlandev->rx.atim++;
+			break;
+		case WLAN_FSTYPE_DISASSOC:
+			wlandev->rx.disassoc++;
+			break;
+		case WLAN_FSTYPE_AUTHEN:
+			wlandev->rx.authen++;
+			break;
+		case WLAN_FSTYPE_DEAUTHEN:
+			wlandev->rx.deauthen++;
+			break;
+		default:
+			wlandev->rx.mgmt_unknown++;
+			break;
+		}
+		drop = 2;
+		break;
+
+	case WLAN_FTYPE_CTL:
+		if ((wlandev->netdev->flags & IFF_PROMISC) ||
+		    (wlandev->netdev->flags & IFF_ALLMULTI)) {
+			drop = 1;
+			break;
+		}
+		netdev_dbg(wlandev->netdev, "rx'd ctl:\n");
+		wlandev->rx.ctl++;
+		switch (fstype) {
+		case WLAN_FSTYPE_PSPOLL:
+			wlandev->rx.pspoll++;
+			break;
+		case WLAN_FSTYPE_RTS:
+			wlandev->rx.rts++;
+			break;
+		case WLAN_FSTYPE_CTS:
+			wlandev->rx.cts++;
+			break;
+		case WLAN_FSTYPE_ACK:
+			wlandev->rx.ack++;
+			break;
+		case WLAN_FSTYPE_CFEND:
+			wlandev->rx.cfend++;
+			break;
+		case WLAN_FSTYPE_CFENDCFACK:
+			wlandev->rx.cfendcfack++;
+			break;
+		default:
+			wlandev->rx.ctl_unknown++;
+			break;
+		}
+		drop = 2;
+		break;
+
+	case WLAN_FTYPE_DATA:
+		wlandev->rx.data++;
+		switch (fstype) {
+		case WLAN_FSTYPE_DATAONLY:
+			wlandev->rx.dataonly++;
+			break;
+		case WLAN_FSTYPE_DATA_CFACK:
+			wlandev->rx.data_cfack++;
+			break;
+		case WLAN_FSTYPE_DATA_CFPOLL:
+			wlandev->rx.data_cfpoll++;
+			break;
+		case WLAN_FSTYPE_DATA_CFACK_CFPOLL:
+			wlandev->rx.data__cfack_cfpoll++;
+			break;
+		case WLAN_FSTYPE_NULL:
+			netdev_dbg(wlandev->netdev, "rx'd data:null\n");
+			wlandev->rx.null++;
+			break;
+		case WLAN_FSTYPE_CFACK:
+			netdev_dbg(wlandev->netdev, "rx'd data:cfack\n");
+			wlandev->rx.cfack++;
+			break;
+		case WLAN_FSTYPE_CFPOLL:
+			netdev_dbg(wlandev->netdev, "rx'd data:cfpoll\n");
+			wlandev->rx.cfpoll++;
+			break;
+		case WLAN_FSTYPE_CFACK_CFPOLL:
+			netdev_dbg(wlandev->netdev, "rx'd data:cfack_cfpoll\n");
+			wlandev->rx.cfack_cfpoll++;
+			break;
+		default:
+			wlandev->rx.data_unknown++;
+			break;
+		}
+
+		break;
+	}
+	return drop;
+}
+
+static void p80211knetdev_tx_timeout(struct net_device *netdev, unsigned int txqueue)
+{
+	struct wlandevice *wlandev = netdev->ml_priv;
+
+	if (wlandev->tx_timeout) {
+		wlandev->tx_timeout(wlandev);
+	} else {
+		netdev_warn(netdev, "Implement tx_timeout for %s\n",
+			    wlandev->nsdname);
+		netif_wake_queue(wlandev->netdev);
+	}
+}