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, 1189 insertions, 0 deletions

diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c
new file mode 100644
index 000000000..29bf8664b
--- /dev/null
+++ b/drivers/usb/gadget/function/rndis.c
@@ -0,0 +1,1189 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * RNDIS MSG parser
+ *
+ * Authors:	Benedikt Spranger, Pengutronix
+ *		Robert Schwebel, Pengutronix
+ *
+ *		This software was originally developed in conformance with
+ *		Microsoft's Remote NDIS Specification License Agreement.
+ *
+ * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
+ *		Fixed message length bug in init_response
+ *
+ * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
+ *		Fixed rndis_rm_hdr length bug.
+ *
+ * Copyright (C) 2004 by David Brownell
+ *		updates to merge with Linux 2.6, better match RNDIS spec
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/idr.h>
+#include <linux/list.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+#include <linux/netdevice.h>
+
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+#include "u_rndis.h"
+
+#undef	VERBOSE_DEBUG
+
+#include "rndis.h"
+
+
+/* The driver for your USB chip needs to support ep0 OUT to work with
+ * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
+ *
+ * Windows hosts need an INF file like Documentation/usb/linux.inf
+ * and will be happier if you provide the host_addr module parameter.
+ */
+
+#if 0
+static int rndis_debug = 0;
+module_param (rndis_debug, int, 0);
+MODULE_PARM_DESC (rndis_debug, "enable debugging");
+#else
+#define rndis_debug		0
+#endif
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+#define	NAME_TEMPLATE "driver/rndis-%03d"
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+static DEFINE_IDA(rndis_ida);
+
+/* Driver Version */
+static const __le32 rndis_driver_version = cpu_to_le32(1);
+
+/* Function Prototypes */
+static rndis_resp_t *rndis_add_response(struct rndis_params *params,
+					u32 length);
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static const struct proc_ops rndis_proc_ops;
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+/* supported OIDs */
+static const u32 oid_supported_list[] = {
+	/* the general stuff */
+	RNDIS_OID_GEN_SUPPORTED_LIST,
+	RNDIS_OID_GEN_HARDWARE_STATUS,
+	RNDIS_OID_GEN_MEDIA_SUPPORTED,
+	RNDIS_OID_GEN_MEDIA_IN_USE,
+	RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE,
+	RNDIS_OID_GEN_LINK_SPEED,
+	RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE,
+	RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE,
+	RNDIS_OID_GEN_VENDOR_ID,
+	RNDIS_OID_GEN_VENDOR_DESCRIPTION,
+	RNDIS_OID_GEN_VENDOR_DRIVER_VERSION,
+	RNDIS_OID_GEN_CURRENT_PACKET_FILTER,
+	RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE,
+	RNDIS_OID_GEN_MEDIA_CONNECT_STATUS,
+	RNDIS_OID_GEN_PHYSICAL_MEDIUM,
+
+	/* the statistical stuff */
+	RNDIS_OID_GEN_XMIT_OK,
+	RNDIS_OID_GEN_RCV_OK,
+	RNDIS_OID_GEN_XMIT_ERROR,
+	RNDIS_OID_GEN_RCV_ERROR,
+	RNDIS_OID_GEN_RCV_NO_BUFFER,
+#ifdef	RNDIS_OPTIONAL_STATS
+	RNDIS_OID_GEN_DIRECTED_BYTES_XMIT,
+	RNDIS_OID_GEN_DIRECTED_FRAMES_XMIT,
+	RNDIS_OID_GEN_MULTICAST_BYTES_XMIT,
+	RNDIS_OID_GEN_MULTICAST_FRAMES_XMIT,
+	RNDIS_OID_GEN_BROADCAST_BYTES_XMIT,
+	RNDIS_OID_GEN_BROADCAST_FRAMES_XMIT,
+	RNDIS_OID_GEN_DIRECTED_BYTES_RCV,
+	RNDIS_OID_GEN_DIRECTED_FRAMES_RCV,
+	RNDIS_OID_GEN_MULTICAST_BYTES_RCV,
+	RNDIS_OID_GEN_MULTICAST_FRAMES_RCV,
+	RNDIS_OID_GEN_BROADCAST_BYTES_RCV,
+	RNDIS_OID_GEN_BROADCAST_FRAMES_RCV,
+	RNDIS_OID_GEN_RCV_CRC_ERROR,
+	RNDIS_OID_GEN_TRANSMIT_QUEUE_LENGTH,
+#endif	/* RNDIS_OPTIONAL_STATS */
+
+	/* mandatory 802.3 */
+	/* the general stuff */
+	RNDIS_OID_802_3_PERMANENT_ADDRESS,
+	RNDIS_OID_802_3_CURRENT_ADDRESS,
+	RNDIS_OID_802_3_MULTICAST_LIST,
+	RNDIS_OID_802_3_MAC_OPTIONS,
+	RNDIS_OID_802_3_MAXIMUM_LIST_SIZE,
+
+	/* the statistical stuff */
+	RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT,
+	RNDIS_OID_802_3_XMIT_ONE_COLLISION,
+	RNDIS_OID_802_3_XMIT_MORE_COLLISIONS,
+#ifdef	RNDIS_OPTIONAL_STATS
+	RNDIS_OID_802_3_XMIT_DEFERRED,
+	RNDIS_OID_802_3_XMIT_MAX_COLLISIONS,
+	RNDIS_OID_802_3_RCV_OVERRUN,
+	RNDIS_OID_802_3_XMIT_UNDERRUN,
+	RNDIS_OID_802_3_XMIT_HEARTBEAT_FAILURE,
+	RNDIS_OID_802_3_XMIT_TIMES_CRS_LOST,
+	RNDIS_OID_802_3_XMIT_LATE_COLLISIONS,
+#endif	/* RNDIS_OPTIONAL_STATS */
+
+#ifdef	RNDIS_PM
+	/* PM and wakeup are "mandatory" for USB, but the RNDIS specs
+	 * don't say what they mean ... and the NDIS specs are often
+	 * confusing and/or ambiguous in this context.  (That is, more
+	 * so than their specs for the other OIDs.)
+	 *
+	 * FIXME someone who knows what these should do, please
+	 * implement them!
+	 */
+
+	/* power management */
+	OID_PNP_CAPABILITIES,
+	OID_PNP_QUERY_POWER,
+	OID_PNP_SET_POWER,
+
+#ifdef	RNDIS_WAKEUP
+	/* wake up host */
+	OID_PNP_ENABLE_WAKE_UP,
+	OID_PNP_ADD_WAKE_UP_PATTERN,
+	OID_PNP_REMOVE_WAKE_UP_PATTERN,
+#endif	/* RNDIS_WAKEUP */
+#endif	/* RNDIS_PM */
+};
+
+
+/* NDIS Functions */
+static int gen_ndis_query_resp(struct rndis_params *params, u32 OID, u8 *buf,
+			       unsigned buf_len, rndis_resp_t *r)
+{
+	int retval = -ENOTSUPP;
+	u32 length = 4;	/* usually */
+	__le32 *outbuf;
+	int i, count;
+	rndis_query_cmplt_type *resp;
+	struct net_device *net;
+	struct rtnl_link_stats64 temp;
+	const struct rtnl_link_stats64 *stats;
+
+	if (!r) return -ENOMEM;
+	resp = (rndis_query_cmplt_type *)r->buf;
+
+	if (!resp) return -ENOMEM;
+
+	if (buf_len && rndis_debug > 1) {
+		pr_debug("query OID %08x value, len %d:\n", OID, buf_len);
+		for (i = 0; i < buf_len; i += 16) {
+			pr_debug("%03d: %08x %08x %08x %08x\n", i,
+				get_unaligned_le32(&buf[i]),
+				get_unaligned_le32(&buf[i + 4]),
+				get_unaligned_le32(&buf[i + 8]),
+				get_unaligned_le32(&buf[i + 12]));
+		}
+	}
+
+	/* response goes here, right after the header */
+	outbuf = (__le32 *)&resp[1];
+	resp->InformationBufferOffset = cpu_to_le32(16);
+
+	net = params->dev;
+	stats = dev_get_stats(net, &temp);
+
+	switch (OID) {
+
+	/* general oids (table 4-1) */
+
+	/* mandatory */
+	case RNDIS_OID_GEN_SUPPORTED_LIST:
+		pr_debug("%s: RNDIS_OID_GEN_SUPPORTED_LIST\n", __func__);
+		length = sizeof(oid_supported_list);
+		count  = length / sizeof(u32);
+		for (i = 0; i < count; i++)
+			outbuf[i] = cpu_to_le32(oid_supported_list[i]);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_HARDWARE_STATUS:
+		pr_debug("%s: RNDIS_OID_GEN_HARDWARE_STATUS\n", __func__);
+		/* Bogus question!
+		 * Hardware must be ready to receive high level protocols.
+		 * BTW:
+		 * reddite ergo quae sunt Caesaris Caesari
+		 * et quae sunt Dei Deo!
+		 */
+		*outbuf = cpu_to_le32(0);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_MEDIA_SUPPORTED:
+		pr_debug("%s: RNDIS_OID_GEN_MEDIA_SUPPORTED\n", __func__);
+		*outbuf = cpu_to_le32(params->medium);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_MEDIA_IN_USE:
+		pr_debug("%s: RNDIS_OID_GEN_MEDIA_IN_USE\n", __func__);
+		/* one medium, one transport... (maybe you do it better) */
+		*outbuf = cpu_to_le32(params->medium);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE:
+		pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
+		if (params->dev) {
+			*outbuf = cpu_to_le32(params->dev->mtu);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_LINK_SPEED:
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_OID_GEN_LINK_SPEED\n", __func__);
+		if (params->media_state == RNDIS_MEDIA_STATE_DISCONNECTED)
+			*outbuf = cpu_to_le32(0);
+		else
+			*outbuf = cpu_to_le32(params->speed);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE:
+		pr_debug("%s: RNDIS_OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
+		if (params->dev) {
+			*outbuf = cpu_to_le32(params->dev->mtu);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE:
+		pr_debug("%s: RNDIS_OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
+		if (params->dev) {
+			*outbuf = cpu_to_le32(params->dev->mtu);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_VENDOR_ID:
+		pr_debug("%s: RNDIS_OID_GEN_VENDOR_ID\n", __func__);
+		*outbuf = cpu_to_le32(params->vendorID);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_VENDOR_DESCRIPTION:
+		pr_debug("%s: RNDIS_OID_GEN_VENDOR_DESCRIPTION\n", __func__);
+		if (params->vendorDescr) {
+			length = strlen(params->vendorDescr);
+			memcpy(outbuf, params->vendorDescr, length);
+		} else {
+			outbuf[0] = 0;
+		}
+		retval = 0;
+		break;
+
+	case RNDIS_OID_GEN_VENDOR_DRIVER_VERSION:
+		pr_debug("%s: RNDIS_OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
+		/* Created as LE */
+		*outbuf = rndis_driver_version;
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
+		pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
+		*outbuf = cpu_to_le32(*params->filter);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE:
+		pr_debug("%s: RNDIS_OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
+		*outbuf = cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_MEDIA_CONNECT_STATUS:
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
+		*outbuf = cpu_to_le32(params->media_state);
+		retval = 0;
+		break;
+
+	case RNDIS_OID_GEN_PHYSICAL_MEDIUM:
+		pr_debug("%s: RNDIS_OID_GEN_PHYSICAL_MEDIUM\n", __func__);
+		*outbuf = cpu_to_le32(0);
+		retval = 0;
+		break;
+
+	/* The RNDIS specification is incomplete/wrong.   Some versions
+	 * of MS-Windows expect OIDs that aren't specified there.  Other
+	 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
+	 */
+	case RNDIS_OID_GEN_MAC_OPTIONS:		/* from WinME */
+		pr_debug("%s: RNDIS_OID_GEN_MAC_OPTIONS\n", __func__);
+		*outbuf = cpu_to_le32(
+			  RNDIS_MAC_OPTION_RECEIVE_SERIALIZED
+			| RNDIS_MAC_OPTION_FULL_DUPLEX);
+		retval = 0;
+		break;
+
+	/* statistics OIDs (table 4-2) */
+
+	/* mandatory */
+	case RNDIS_OID_GEN_XMIT_OK:
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_OID_GEN_XMIT_OK\n", __func__);
+		if (stats) {
+			*outbuf = cpu_to_le32(stats->tx_packets
+				- stats->tx_errors - stats->tx_dropped);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_RCV_OK:
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_OID_GEN_RCV_OK\n", __func__);
+		if (stats) {
+			*outbuf = cpu_to_le32(stats->rx_packets
+				- stats->rx_errors - stats->rx_dropped);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_XMIT_ERROR:
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_OID_GEN_XMIT_ERROR\n", __func__);
+		if (stats) {
+			*outbuf = cpu_to_le32(stats->tx_errors);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_RCV_ERROR:
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_OID_GEN_RCV_ERROR\n", __func__);
+		if (stats) {
+			*outbuf = cpu_to_le32(stats->rx_errors);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_GEN_RCV_NO_BUFFER:
+		pr_debug("%s: RNDIS_OID_GEN_RCV_NO_BUFFER\n", __func__);
+		if (stats) {
+			*outbuf = cpu_to_le32(stats->rx_dropped);
+			retval = 0;
+		}
+		break;
+
+	/* ieee802.3 OIDs (table 4-3) */
+
+	/* mandatory */
+	case RNDIS_OID_802_3_PERMANENT_ADDRESS:
+		pr_debug("%s: RNDIS_OID_802_3_PERMANENT_ADDRESS\n", __func__);
+		if (params->dev) {
+			length = ETH_ALEN;
+			memcpy(outbuf, params->host_mac, length);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_802_3_CURRENT_ADDRESS:
+		pr_debug("%s: RNDIS_OID_802_3_CURRENT_ADDRESS\n", __func__);
+		if (params->dev) {
+			length = ETH_ALEN;
+			memcpy(outbuf, params->host_mac, length);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_802_3_MULTICAST_LIST:
+		pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
+		/* Multicast base address only */
+		*outbuf = cpu_to_le32(0xE0000000);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_802_3_MAXIMUM_LIST_SIZE:
+		pr_debug("%s: RNDIS_OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
+		/* Multicast base address only */
+		*outbuf = cpu_to_le32(1);
+		retval = 0;
+		break;
+
+	case RNDIS_OID_802_3_MAC_OPTIONS:
+		pr_debug("%s: RNDIS_OID_802_3_MAC_OPTIONS\n", __func__);
+		*outbuf = cpu_to_le32(0);
+		retval = 0;
+		break;
+
+	/* ieee802.3 statistics OIDs (table 4-4) */
+
+	/* mandatory */
+	case RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT:
+		pr_debug("%s: RNDIS_OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
+		if (stats) {
+			*outbuf = cpu_to_le32(stats->rx_frame_errors);
+			retval = 0;
+		}
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_802_3_XMIT_ONE_COLLISION:
+		pr_debug("%s: RNDIS_OID_802_3_XMIT_ONE_COLLISION\n", __func__);
+		*outbuf = cpu_to_le32(0);
+		retval = 0;
+		break;
+
+	/* mandatory */
+	case RNDIS_OID_802_3_XMIT_MORE_COLLISIONS:
+		pr_debug("%s: RNDIS_OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
+		*outbuf = cpu_to_le32(0);
+		retval = 0;
+		break;
+
+	default:
+		pr_warn("%s: query unknown OID 0x%08X\n", __func__, OID);
+	}
+	if (retval < 0)
+		length = 0;
+
+	resp->InformationBufferLength = cpu_to_le32(length);
+	r->length = length + sizeof(*resp);
+	resp->MessageLength = cpu_to_le32(r->length);
+	return retval;
+}
+
+static int gen_ndis_set_resp(struct rndis_params *params, u32 OID,
+			     u8 *buf, u32 buf_len, rndis_resp_t *r)
+{
+	rndis_set_cmplt_type *resp;
+	int i, retval = -ENOTSUPP;
+
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_set_cmplt_type *)r->buf;
+	if (!resp)
+		return -ENOMEM;
+
+	if (buf_len && rndis_debug > 1) {
+		pr_debug("set OID %08x value, len %d:\n", OID, buf_len);
+		for (i = 0; i < buf_len; i += 16) {
+			pr_debug("%03d: %08x %08x %08x %08x\n", i,
+				get_unaligned_le32(&buf[i]),
+				get_unaligned_le32(&buf[i + 4]),
+				get_unaligned_le32(&buf[i + 8]),
+				get_unaligned_le32(&buf[i + 12]));
+		}
+	}
+
+	switch (OID) {
+	case RNDIS_OID_GEN_CURRENT_PACKET_FILTER:
+
+		/* these NDIS_PACKET_TYPE_* bitflags are shared with
+		 * cdc_filter; it's not RNDIS-specific
+		 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
+		 *	PROMISCUOUS, DIRECTED,
+		 *	MULTICAST, ALL_MULTICAST, BROADCAST
+		 */
+		*params->filter = (u16)get_unaligned_le32(buf);
+		pr_debug("%s: RNDIS_OID_GEN_CURRENT_PACKET_FILTER %08x\n",
+			__func__, *params->filter);
+
+		/* this call has a significant side effect:  it's
+		 * what makes the packet flow start and stop, like
+		 * activating the CDC Ethernet altsetting.
+		 */
+		retval = 0;
+		if (*params->filter) {
+			params->state = RNDIS_DATA_INITIALIZED;
+			netif_carrier_on(params->dev);
+			if (netif_running(params->dev))
+				netif_wake_queue(params->dev);
+		} else {
+			params->state = RNDIS_INITIALIZED;
+			netif_carrier_off(params->dev);
+			netif_stop_queue(params->dev);
+		}
+		break;
+
+	case RNDIS_OID_802_3_MULTICAST_LIST:
+		/* I think we can ignore this */
+		pr_debug("%s: RNDIS_OID_802_3_MULTICAST_LIST\n", __func__);
+		retval = 0;
+		break;
+
+	default:
+		pr_warn("%s: set unknown OID 0x%08X, size %d\n",
+			__func__, OID, buf_len);
+	}
+
+	return retval;
+}
+
+/*
+ * Response Functions
+ */
+
+static int rndis_init_response(struct rndis_params *params,
+			       rndis_init_msg_type *buf)
+{
+	rndis_init_cmplt_type *resp;
+	rndis_resp_t *r;
+
+	if (!params->dev)
+		return -ENOTSUPP;
+
+	r = rndis_add_response(params, sizeof(rndis_init_cmplt_type));
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_init_cmplt_type *)r->buf;
+
+	resp->MessageType = cpu_to_le32(RNDIS_MSG_INIT_C);
+	resp->MessageLength = cpu_to_le32(52);
+	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+	resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+	resp->MajorVersion = cpu_to_le32(RNDIS_MAJOR_VERSION);
+	resp->MinorVersion = cpu_to_le32(RNDIS_MINOR_VERSION);
+	resp->DeviceFlags = cpu_to_le32(RNDIS_DF_CONNECTIONLESS);
+	resp->Medium = cpu_to_le32(RNDIS_MEDIUM_802_3);
+	resp->MaxPacketsPerTransfer = cpu_to_le32(1);
+	resp->MaxTransferSize = cpu_to_le32(
+		  params->dev->mtu
+		+ sizeof(struct ethhdr)
+		+ sizeof(struct rndis_packet_msg_type)
+		+ 22);
+	resp->PacketAlignmentFactor = cpu_to_le32(0);
+	resp->AFListOffset = cpu_to_le32(0);
+	resp->AFListSize = cpu_to_le32(0);
+
+	params->resp_avail(params->v);
+	return 0;
+}
+
+static int rndis_query_response(struct rndis_params *params,
+				rndis_query_msg_type *buf)
+{
+	rndis_query_cmplt_type *resp;
+	rndis_resp_t *r;
+
+	/* pr_debug("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID)); */
+	if (!params->dev)
+		return -ENOTSUPP;
+
+	/*
+	 * we need more memory:
+	 * gen_ndis_query_resp expects enough space for
+	 * rndis_query_cmplt_type followed by data.
+	 * oid_supported_list is the largest data reply
+	 */
+	r = rndis_add_response(params,
+		sizeof(oid_supported_list) + sizeof(rndis_query_cmplt_type));
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_query_cmplt_type *)r->buf;
+
+	resp->MessageType = cpu_to_le32(RNDIS_MSG_QUERY_C);
+	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+
+	if (gen_ndis_query_resp(params, le32_to_cpu(buf->OID),
+			le32_to_cpu(buf->InformationBufferOffset)
+					+ 8 + (u8 *)buf,
+			le32_to_cpu(buf->InformationBufferLength),
+			r)) {
+		/* OID not supported */
+		resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
+		resp->MessageLength = cpu_to_le32(sizeof *resp);
+		resp->InformationBufferLength = cpu_to_le32(0);
+		resp->InformationBufferOffset = cpu_to_le32(0);
+	} else
+		resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+
+	params->resp_avail(params->v);
+	return 0;
+}
+
+static int rndis_set_response(struct rndis_params *params,
+			      rndis_set_msg_type *buf)
+{
+	u32 BufLength, BufOffset;
+	rndis_set_cmplt_type *resp;
+	rndis_resp_t *r;
+
+	BufLength = le32_to_cpu(buf->InformationBufferLength);
+	BufOffset = le32_to_cpu(buf->InformationBufferOffset);
+	if ((BufLength > RNDIS_MAX_TOTAL_SIZE) ||
+	    (BufOffset > RNDIS_MAX_TOTAL_SIZE) ||
+	    (BufOffset + 8 >= RNDIS_MAX_TOTAL_SIZE))
+		    return -EINVAL;
+
+	r = rndis_add_response(params, sizeof(rndis_set_cmplt_type));
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_set_cmplt_type *)r->buf;
+
+#ifdef	VERBOSE_DEBUG
+	pr_debug("%s: Length: %d\n", __func__, BufLength);
+	pr_debug("%s: Offset: %d\n", __func__, BufOffset);
+	pr_debug("%s: InfoBuffer: ", __func__);
+
+	for (i = 0; i < BufLength; i++) {
+		pr_debug("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
+	}
+
+	pr_debug("\n");
+#endif
+
+	resp->MessageType = cpu_to_le32(RNDIS_MSG_SET_C);
+	resp->MessageLength = cpu_to_le32(16);
+	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+	if (gen_ndis_set_resp(params, le32_to_cpu(buf->OID),
+			((u8 *)buf) + 8 + BufOffset, BufLength, r))
+		resp->Status = cpu_to_le32(RNDIS_STATUS_NOT_SUPPORTED);
+	else
+		resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+
+	params->resp_avail(params->v);
+	return 0;
+}
+
+static int rndis_reset_response(struct rndis_params *params,
+				rndis_reset_msg_type *buf)
+{
+	rndis_reset_cmplt_type *resp;
+	rndis_resp_t *r;
+	u8 *xbuf;
+	u32 length;
+
+	/* drain the response queue */
+	while ((xbuf = rndis_get_next_response(params, &length)))
+		rndis_free_response(params, xbuf);
+
+	r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type));
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_reset_cmplt_type *)r->buf;
+
+	resp->MessageType = cpu_to_le32(RNDIS_MSG_RESET_C);
+	resp->MessageLength = cpu_to_le32(16);
+	resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+	/* resent information */
+	resp->AddressingReset = cpu_to_le32(1);
+
+	params->resp_avail(params->v);
+	return 0;
+}
+
+static int rndis_keepalive_response(struct rndis_params *params,
+				    rndis_keepalive_msg_type *buf)
+{
+	rndis_keepalive_cmplt_type *resp;
+	rndis_resp_t *r;
+
+	/* host "should" check only in RNDIS_DATA_INITIALIZED state */
+
+	r = rndis_add_response(params, sizeof(rndis_keepalive_cmplt_type));
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_keepalive_cmplt_type *)r->buf;
+
+	resp->MessageType = cpu_to_le32(RNDIS_MSG_KEEPALIVE_C);
+	resp->MessageLength = cpu_to_le32(16);
+	resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
+	resp->Status = cpu_to_le32(RNDIS_STATUS_SUCCESS);
+
+	params->resp_avail(params->v);
+	return 0;
+}
+
+
+/*
+ * Device to Host Comunication
+ */
+static int rndis_indicate_status_msg(struct rndis_params *params, u32 status)
+{
+	rndis_indicate_status_msg_type *resp;
+	rndis_resp_t *r;
+
+	if (params->state == RNDIS_UNINITIALIZED)
+		return -ENOTSUPP;
+
+	r = rndis_add_response(params, sizeof(rndis_indicate_status_msg_type));
+	if (!r)
+		return -ENOMEM;
+	resp = (rndis_indicate_status_msg_type *)r->buf;
+
+	resp->MessageType = cpu_to_le32(RNDIS_MSG_INDICATE);
+	resp->MessageLength = cpu_to_le32(20);
+	resp->Status = cpu_to_le32(status);
+	resp->StatusBufferLength = cpu_to_le32(0);
+	resp->StatusBufferOffset = cpu_to_le32(0);
+
+	params->resp_avail(params->v);
+	return 0;
+}
+
+int rndis_signal_connect(struct rndis_params *params)
+{
+	params->media_state = RNDIS_MEDIA_STATE_CONNECTED;
+	return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_CONNECT);
+}
+EXPORT_SYMBOL_GPL(rndis_signal_connect);
+
+int rndis_signal_disconnect(struct rndis_params *params)
+{
+	params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
+	return rndis_indicate_status_msg(params, RNDIS_STATUS_MEDIA_DISCONNECT);
+}
+EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
+
+void rndis_uninit(struct rndis_params *params)
+{
+	u8 *buf;
+	u32 length;
+
+	if (!params)
+		return;
+	params->state = RNDIS_UNINITIALIZED;
+
+	/* drain the response queue */
+	while ((buf = rndis_get_next_response(params, &length)))
+		rndis_free_response(params, buf);
+}
+EXPORT_SYMBOL_GPL(rndis_uninit);
+
+void rndis_set_host_mac(struct rndis_params *params, const u8 *addr)
+{
+	params->host_mac = addr;
+}
+EXPORT_SYMBOL_GPL(rndis_set_host_mac);
+
+/*
+ * Message Parser
+ */
+int rndis_msg_parser(struct rndis_params *params, u8 *buf)
+{
+	u32 MsgType, MsgLength;
+	__le32 *tmp;
+
+	if (!buf)
+		return -ENOMEM;
+
+	tmp = (__le32 *)buf;
+	MsgType   = get_unaligned_le32(tmp++);
+	MsgLength = get_unaligned_le32(tmp++);
+
+	if (!params)
+		return -ENOTSUPP;
+
+	/* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
+	 * rx/tx statistics and link status, in addition to KEEPALIVE traffic
+	 * and normal HC level polling to see if there's any IN traffic.
+	 */
+
+	/* For USB: responses may take up to 10 seconds */
+	switch (MsgType) {
+	case RNDIS_MSG_INIT:
+		pr_debug("%s: RNDIS_MSG_INIT\n",
+			__func__);
+		params->state = RNDIS_INITIALIZED;
+		return rndis_init_response(params, (rndis_init_msg_type *)buf);
+
+	case RNDIS_MSG_HALT:
+		pr_debug("%s: RNDIS_MSG_HALT\n",
+			__func__);
+		params->state = RNDIS_UNINITIALIZED;
+		if (params->dev) {
+			netif_carrier_off(params->dev);
+			netif_stop_queue(params->dev);
+		}
+		return 0;
+
+	case RNDIS_MSG_QUERY:
+		return rndis_query_response(params,
+					(rndis_query_msg_type *)buf);
+
+	case RNDIS_MSG_SET:
+		return rndis_set_response(params, (rndis_set_msg_type *)buf);
+
+	case RNDIS_MSG_RESET:
+		pr_debug("%s: RNDIS_MSG_RESET\n",
+			__func__);
+		return rndis_reset_response(params,
+					(rndis_reset_msg_type *)buf);
+
+	case RNDIS_MSG_KEEPALIVE:
+		/* For USB: host does this every 5 seconds */
+		if (rndis_debug > 1)
+			pr_debug("%s: RNDIS_MSG_KEEPALIVE\n",
+				__func__);
+		return rndis_keepalive_response(params,
+						 (rndis_keepalive_msg_type *)
+						 buf);
+
+	default:
+		/* At least Windows XP emits some undefined RNDIS messages.
+		 * In one case those messages seemed to relate to the host
+		 * suspending itself.
+		 */
+		pr_warn("%s: unknown RNDIS message 0x%08X len %d\n",
+			__func__, MsgType, MsgLength);
+		/* Garbled message can be huge, so limit what we display */
+		if (MsgLength > 16)
+			MsgLength = 16;
+		print_hex_dump_bytes(__func__, DUMP_PREFIX_OFFSET,
+				     buf, MsgLength);
+		break;
+	}
+
+	return -ENOTSUPP;
+}
+EXPORT_SYMBOL_GPL(rndis_msg_parser);
+
+static inline int rndis_get_nr(void)
+{
+	return ida_simple_get(&rndis_ida, 0, 1000, GFP_KERNEL);
+}
+
+static inline void rndis_put_nr(int nr)
+{
+	ida_simple_remove(&rndis_ida, nr);
+}
+
+struct rndis_params *rndis_register(void (*resp_avail)(void *v), void *v)
+{
+	struct rndis_params *params;
+	int i;
+
+	if (!resp_avail)
+		return ERR_PTR(-EINVAL);
+
+	i = rndis_get_nr();
+	if (i < 0) {
+		pr_debug("failed\n");
+
+		return ERR_PTR(-ENODEV);
+	}
+
+	params = kzalloc(sizeof(*params), GFP_KERNEL);
+	if (!params) {
+		rndis_put_nr(i);
+
+		return ERR_PTR(-ENOMEM);
+	}
+
+#ifdef	CONFIG_USB_GADGET_DEBUG_FILES
+	{
+		struct proc_dir_entry *proc_entry;
+		char name[20];
+
+		sprintf(name, NAME_TEMPLATE, i);
+		proc_entry = proc_create_data(name, 0660, NULL,
+					      &rndis_proc_ops, params);
+		if (!proc_entry) {
+			kfree(params);
+			rndis_put_nr(i);
+
+			return ERR_PTR(-EIO);
+		}
+	}
+#endif
+
+	params->confignr = i;
+	params->used = 1;
+	params->state = RNDIS_UNINITIALIZED;
+	params->media_state = RNDIS_MEDIA_STATE_DISCONNECTED;
+	params->resp_avail = resp_avail;
+	params->v = v;
+	INIT_LIST_HEAD(&params->resp_queue);
+	spin_lock_init(&params->resp_lock);
+	pr_debug("%s: configNr = %d\n", __func__, i);
+
+	return params;
+}
+EXPORT_SYMBOL_GPL(rndis_register);
+
+void rndis_deregister(struct rndis_params *params)
+{
+	int i;
+
+	pr_debug("%s:\n", __func__);
+
+	if (!params)
+		return;
+
+	i = params->confignr;
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+	{
+		char name[20];
+
+		sprintf(name, NAME_TEMPLATE, i);
+		remove_proc_entry(name, NULL);
+	}
+#endif
+
+	kfree(params);
+	rndis_put_nr(i);
+}
+EXPORT_SYMBOL_GPL(rndis_deregister);
+int rndis_set_param_dev(struct rndis_params *params, struct net_device *dev,
+			u16 *cdc_filter)
+{
+	pr_debug("%s:\n", __func__);
+	if (!dev)
+		return -EINVAL;
+	if (!params)
+		return -1;
+
+	params->dev = dev;
+	params->filter = cdc_filter;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_set_param_dev);
+
+int rndis_set_param_vendor(struct rndis_params *params, u32 vendorID,
+			   const char *vendorDescr)
+{
+	pr_debug("%s:\n", __func__);
+	if (!vendorDescr) return -1;
+	if (!params)
+		return -1;
+
+	params->vendorID = vendorID;
+	params->vendorDescr = vendorDescr;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
+
+int rndis_set_param_medium(struct rndis_params *params, u32 medium, u32 speed)
+{
+	pr_debug("%s: %u %u\n", __func__, medium, speed);
+	if (!params)
+		return -1;
+
+	params->medium = medium;
+	params->speed = speed;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_set_param_medium);
+
+void rndis_add_hdr(struct sk_buff *skb)
+{
+	struct rndis_packet_msg_type *header;
+
+	if (!skb)
+		return;
+	header = skb_push(skb, sizeof(*header));
+	memset(header, 0, sizeof *header);
+	header->MessageType = cpu_to_le32(RNDIS_MSG_PACKET);
+	header->MessageLength = cpu_to_le32(skb->len);
+	header->DataOffset = cpu_to_le32(36);
+	header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
+}
+EXPORT_SYMBOL_GPL(rndis_add_hdr);
+
+void rndis_free_response(struct rndis_params *params, u8 *buf)
+{
+	rndis_resp_t *r, *n;
+
+	spin_lock(&params->resp_lock);
+	list_for_each_entry_safe(r, n, &params->resp_queue, list) {
+		if (r->buf == buf) {
+			list_del(&r->list);
+			kfree(r);
+		}
+	}
+	spin_unlock(&params->resp_lock);
+}
+EXPORT_SYMBOL_GPL(rndis_free_response);
+
+u8 *rndis_get_next_response(struct rndis_params *params, u32 *length)
+{
+	rndis_resp_t *r, *n;
+
+	if (!length) return NULL;
+
+	spin_lock(&params->resp_lock);
+	list_for_each_entry_safe(r, n, &params->resp_queue, list) {
+		if (!r->send) {
+			r->send = 1;
+			*length = r->length;
+			spin_unlock(&params->resp_lock);
+			return r->buf;
+		}
+	}
+
+	spin_unlock(&params->resp_lock);
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(rndis_get_next_response);
+
+static rndis_resp_t *rndis_add_response(struct rndis_params *params, u32 length)
+{
+	rndis_resp_t *r;
+
+	/* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
+	r = kmalloc(sizeof(rndis_resp_t) + length, GFP_ATOMIC);
+	if (!r) return NULL;
+
+	r->buf = (u8 *)(r + 1);
+	r->length = length;
+	r->send = 0;
+
+	spin_lock(&params->resp_lock);
+	list_add_tail(&r->list, &params->resp_queue);
+	spin_unlock(&params->resp_lock);
+	return r;
+}
+
+int rndis_rm_hdr(struct gether *port,
+			struct sk_buff *skb,
+			struct sk_buff_head *list)
+{
+	/* tmp points to a struct rndis_packet_msg_type */
+	__le32 *tmp = (void *)skb->data;
+
+	/* MessageType, MessageLength */
+	if (cpu_to_le32(RNDIS_MSG_PACKET)
+			!= get_unaligned(tmp++)) {
+		dev_kfree_skb_any(skb);
+		return -EINVAL;
+	}
+	tmp++;
+
+	/* DataOffset, DataLength */
+	if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8)) {
+		dev_kfree_skb_any(skb);
+		return -EOVERFLOW;
+	}
+	skb_trim(skb, get_unaligned_le32(tmp++));
+
+	skb_queue_tail(list, skb);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rndis_rm_hdr);
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static int rndis_proc_show(struct seq_file *m, void *v)
+{
+	rndis_params *param = m->private;
+
+	seq_printf(m,
+			 "Config Nr. %d\n"
+			 "used      : %s\n"
+			 "state     : %s\n"
+			 "medium    : 0x%08X\n"
+			 "speed     : %u\n"
+			 "cable     : %s\n"
+			 "vendor ID : 0x%08X\n"
+			 "vendor    : %s\n",
+			 param->confignr, (param->used) ? "y" : "n",
+			 ({ char *s = "?";
+			 switch (param->state) {
+			 case RNDIS_UNINITIALIZED:
+				s = "RNDIS_UNINITIALIZED"; break;
+			 case RNDIS_INITIALIZED:
+				s = "RNDIS_INITIALIZED"; break;
+			 case RNDIS_DATA_INITIALIZED:
+				s = "RNDIS_DATA_INITIALIZED"; break;
+			} s; }),
+			 param->medium,
+			 (param->media_state) ? 0 : param->speed*100,
+			 (param->media_state) ? "disconnected" : "connected",
+			 param->vendorID, param->vendorDescr);
+	return 0;
+}
+
+static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
+				size_t count, loff_t *ppos)
+{
+	rndis_params *p = pde_data(file_inode(file));
+	u32 speed = 0;
+	int i, fl_speed = 0;
+
+	for (i = 0; i < count; i++) {
+		char c;
+		if (get_user(c, buffer))
+			return -EFAULT;
+		switch (c) {
+		case '0':
+		case '1':
+		case '2':
+		case '3':
+		case '4':
+		case '5':
+		case '6':
+		case '7':
+		case '8':
+		case '9':
+			fl_speed = 1;
+			speed = speed * 10 + c - '0';
+			break;
+		case 'C':
+		case 'c':
+			rndis_signal_connect(p);
+			break;
+		case 'D':
+		case 'd':
+			rndis_signal_disconnect(p);
+			break;
+		default:
+			if (fl_speed) p->speed = speed;
+			else pr_debug("%c is not valid\n", c);
+			break;
+		}
+
+		buffer++;
+	}
+
+	return count;
+}
+
+static int rndis_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rndis_proc_show, pde_data(inode));
+}
+
+static const struct proc_ops rndis_proc_ops = {
+	.proc_open	= rndis_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+	.proc_write	= rndis_proc_write,
+};
+
+#define	NAME_TEMPLATE "driver/rndis-%03d"
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */