uwb: Remove the WLP subsystem and drivers

The only Wimedia LLC Protocol (WLP) hardware was an Intel i1480 chip
with a beta release of firmware that was never commercially available as
a product. This hardware and firmware is no longer available as Intel
sold their UWB/WLP IP. I also see little prospect of other WLP
capable hardware ever being available.

Signed-off-by: David Vrabel <[e-mail]>

MAINTAINERS

···
 L:	[e-mail]
 S:	Supported
 F:	drivers/uwb/
-X:	drivers/uwb/wlp/
-X:	drivers/uwb/i1480/i1480u-wlp/
-X:	drivers/uwb/i1480/i1480-wlp.h
 F:	include/linux/uwb.h
 F:	include/linux/uwb/
 
···
 F:	include/linux/wimax/debug.h
 F:	include/net/wimax.h
 F:	net/wimax/
-
-WIMEDIA LLC PROTOCOL (WLP) SUBSYSTEM
-M:	David Vrabel <[e-mail]>
-L:	[e-mail]
-S:	Maintained
-F:	include/linux/wlp.h
-F:	drivers/uwb/wlp/
-F:	drivers/uwb/i1480/i1480u-wlp/
-F:	drivers/uwb/i1480/i1480-wlp.h
 
 WISTRON LAPTOP BUTTON DRIVER
 M:	Miloslav Trmac <[e-mail]>

drivers/uwb/Kconfig

···
 	  technology using a wide spectrum (3.1-10.6GHz). It is
 	  optimized for in-room use (480Mbps at 2 meters, 110Mbps at
 	  10m). It serves as the transport layer for other protocols,
-	  such as Wireless USB (WUSB), IP (WLP) and upcoming
-	  Bluetooth and 1394
+	  such as Wireless USB (WUSB).
 
 	  The topology is peer to peer; however, higher level
 	  protocols (such as WUSB) might impose a master/slave
···
           To compile this driver select Y (built in) or M (module). It
           is safe to select any even if you do not have the hardware.
 
-config UWB_WLP
-	tristate "Support WiMedia Link Protocol (Ethernet/IP over UWB)"
-	depends on UWB && NET
-	help
-	  This is a common library for drivers that implement
-	  networking over UWB.
-
 config UWB_I1480U
         tristate "Support for Intel Wireless UWB Link 1480 HWA"
         depends on UWB_HWA
···
 
          To compile this driver select Y (built in) or M (module). It
          is safe to select any even if you do not have the hardware.
-
-config UWB_I1480U_WLP
-        tristate "Support for Intel Wireless UWB Link 1480 HWA's WLP interface"
-        depends on UWB_I1480U &&  UWB_WLP && NET
-        help
-         This driver enables WLP support for the i1480 when connected via
-         USB. WLP is the WiMedia Link Protocol, or IP over UWB.
-
-         To compile this driver select Y (built in) or M (module). It
-         is safe to select any even if you don't have the hardware.
 
 endif # UWB

drivers/uwb/Makefile

···
 obj-$(CONFIG_UWB)		+= uwb.o
-obj-$(CONFIG_UWB_WLP)		+= wlp/
 obj-$(CONFIG_UWB_WHCI)		+= umc.o whci.o whc-rc.o
 obj-$(CONFIG_UWB_HWA)		+= hwa-rc.o
 obj-$(CONFIG_UWB_I1480U)	+= i1480/

drivers/uwb/i1480/Makefile

···
 obj-$(CONFIG_UWB_I1480U)	+= dfu/ i1480-est.o
-obj-$(CONFIG_UWB_I1480U_WLP)	+= i1480u-wlp/

drivers/uwb/i1480/i1480-wlp.h

···
-/*
- * Intel 1480 Wireless UWB Link
- * WLP specific definitions
- *
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- */
-
-#ifndef __i1480_wlp_h__
-#define __i1480_wlp_h__
-
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/uwb.h>
-#include <linux/if_ether.h>
-#include <asm/byteorder.h>
-
-/* New simplified header format? */
-#undef WLP_HDR_FMT_2 		/* FIXME: rename */
-
-/**
- * Values of the Delivery ID & Type field when PCA or DRP
- *
- * The Delivery ID & Type field in the WLP TX header indicates whether
- * the frame is PCA or DRP. This is done based on the high level bit of
- * this field.
- * We use this constant to test if the traffic is PCA or DRP as follows:
- * if (wlp_tx_hdr_delivery_id_type(wlp_tx_hdr) & WLP_DRP)
- * 	this is DRP traffic
- * else
- * 	this is PCA traffic
- */
-enum deliver_id_type_bit {
-	WLP_DRP = 8,
-};
-
-/**
- * WLP TX header
- *
- * Indicates UWB/WLP-specific transmission parameters for a network
- * packet.
- */
-struct wlp_tx_hdr {
-	/* dword 0 */
-	struct uwb_dev_addr dstaddr;
-	u8                  key_index;
-	u8                  mac_params;
-	/* dword 1 */
-	u8                  phy_params;
-#ifndef WLP_HDR_FMT_2
-	u8                  reserved;
-	__le16              oui01;              /* FIXME: not so sure if __le16 or u8[2] */
-	/* dword 2 */
-	u8                  oui2;               /*        if all LE, it could be merged */
-	__le16              prid;
-#endif
-} __attribute__((packed));
-
-static inline int wlp_tx_hdr_delivery_id_type(const struct wlp_tx_hdr *hdr)
-{
-	return hdr->mac_params & 0x0f;
-}
-
-static inline int wlp_tx_hdr_ack_policy(const struct wlp_tx_hdr *hdr)
-{
-	return (hdr->mac_params >> 4) & 0x07;
-}
-
-static inline int wlp_tx_hdr_rts_cts(const struct wlp_tx_hdr *hdr)
-{
-	return (hdr->mac_params >> 7) & 0x01;
-}
-
-static inline void wlp_tx_hdr_set_delivery_id_type(struct wlp_tx_hdr *hdr, int id)
-{
-	hdr->mac_params = (hdr->mac_params & ~0x0f) | id;
-}
-
-static inline void wlp_tx_hdr_set_ack_policy(struct wlp_tx_hdr *hdr,
-					     enum uwb_ack_pol policy)
-{
-	hdr->mac_params = (hdr->mac_params & ~0x70) | (policy << 4);
-}
-
-static inline void wlp_tx_hdr_set_rts_cts(struct wlp_tx_hdr *hdr, int rts_cts)
-{
-	hdr->mac_params = (hdr->mac_params & ~0x80) | (rts_cts << 7);
-}
-
-static inline enum uwb_phy_rate wlp_tx_hdr_phy_rate(const struct wlp_tx_hdr *hdr)
-{
-	return hdr->phy_params & 0x0f;
-}
-
-static inline int wlp_tx_hdr_tx_power(const struct wlp_tx_hdr *hdr)
-{
-	return (hdr->phy_params >> 4) & 0x0f;
-}
-
-static inline void wlp_tx_hdr_set_phy_rate(struct wlp_tx_hdr *hdr, enum uwb_phy_rate rate)
-{
-	hdr->phy_params = (hdr->phy_params & ~0x0f) | rate;
-}
-
-static inline void wlp_tx_hdr_set_tx_power(struct wlp_tx_hdr *hdr, int pwr)
-{
-	hdr->phy_params = (hdr->phy_params & ~0xf0) | (pwr << 4);
-}
-
-
-/**
- * WLP RX header
- *
- * Provides UWB/WLP-specific transmission data for a received
- * network packet.
- */
-struct wlp_rx_hdr {
-	/* dword 0 */
-	struct uwb_dev_addr dstaddr;
-	struct uwb_dev_addr srcaddr;
-	/* dword 1 */
-	u8 		    LQI;
-	s8		    RSSI;
-	u8		    reserved3;
-#ifndef WLP_HDR_FMT_2
-	u8 		    oui0;
-	/* dword 2 */
-	__le16		    oui12;
-	__le16		    prid;
-#endif
-} __attribute__((packed));
-
-
-/** User configurable options for WLP */
-struct wlp_options {
-	struct mutex mutex; /* access to user configurable options*/
-	struct wlp_tx_hdr def_tx_hdr;	/* default tx hdr */
-	u8 pca_base_priority;
-	u8 bw_alloc; /*index into bw_allocs[] for PCA/DRP reservations*/
-};
-
-
-static inline
-void wlp_options_init(struct wlp_options *options)
-{
-	mutex_init(&options->mutex);
-	wlp_tx_hdr_set_ack_policy(&options->def_tx_hdr, UWB_ACK_INM);
-	wlp_tx_hdr_set_rts_cts(&options->def_tx_hdr, 1);
-	/* FIXME: default to phy caps */
-	wlp_tx_hdr_set_phy_rate(&options->def_tx_hdr, UWB_PHY_RATE_480);
-#ifndef WLP_HDR_FMT_2
-	options->def_tx_hdr.prid = cpu_to_le16(0x0000);
-#endif
-}
-
-
-/* sysfs helpers */
-
-extern ssize_t uwb_pca_base_priority_store(struct wlp_options *,
-					   const char *, size_t);
-extern ssize_t uwb_pca_base_priority_show(const struct wlp_options *, char *);
-extern ssize_t uwb_bw_alloc_store(struct wlp_options *, const char *, size_t);
-extern ssize_t uwb_bw_alloc_show(const struct wlp_options *, char *);
-extern ssize_t uwb_ack_policy_store(struct wlp_options *,
-				    const char *, size_t);
-extern ssize_t uwb_ack_policy_show(const struct wlp_options *, char *);
-extern ssize_t uwb_rts_cts_store(struct wlp_options *, const char *, size_t);
-extern ssize_t uwb_rts_cts_show(const struct wlp_options *, char *);
-extern ssize_t uwb_phy_rate_store(struct wlp_options *, const char *, size_t);
-extern ssize_t uwb_phy_rate_show(const struct wlp_options *, char *);
-
-
-/** Simple bandwidth allocation (temporary and too simple) */
-struct wlp_bw_allocs {
-	const char *name;
-	struct {
-		u8 mask, stream;
-	} tx, rx;
-};
-
-
-#endif /* #ifndef __i1480_wlp_h__ */

drivers/uwb/i1480/i1480u-wlp/Makefile

···
-obj-$(CONFIG_UWB_I1480U_WLP) += i1480u-wlp.o
-
-i1480u-wlp-objs :=	\
-	lc.o		\
-	netdev.o	\
-	rx.o		\
-	sysfs.o		\
-	tx.o

drivers/uwb/i1480/i1480u-wlp/i1480u-wlp.h

···
-/*
- * Intel 1480 Wireless UWB Link USB
- * Header formats, constants, general internal interfaces
- *
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * This is not an standard interface.
- *
- * FIXME: docs
- *
- * i1480u-wlp is pretty simple: two endpoints, one for tx, one for
- * rx. rx is polled. Network packets (ethernet, whatever) are wrapped
- * in i1480 TX or RX headers (for sending over the air), and these
- * packets are wrapped in UNTD headers (for sending to the WLP UWB
- * controller).
- *
- * UNTD packets (UNTD hdr + i1480 hdr + network packet) packets
- * cannot be bigger than i1480u_MAX_FRG_SIZE. When this happens, the
- * i1480 packet is broken in chunks/packets:
- *
- * UNTD-1st.hdr + i1480.hdr + payload
- * UNTD-next.hdr + payload
- * ...
- * UNTD-last.hdr + payload
- *
- * so that each packet is smaller or equal than i1480u_MAX_FRG_SIZE.
- *
- * All HW structures and bitmaps are little endian, so we need to play
- * ugly tricks when defining bitfields. Hoping for the day GCC
- * implements __attribute__((endian(1234))).
- *
- * FIXME: ROADMAP to the whole implementation
- */
-
-#ifndef __i1480u_wlp_h__
-#define __i1480u_wlp_h__
-
-#include <linux/usb.h>
-#include <linux/netdevice.h>
-#include <linux/uwb.h>		/* struct uwb_rc, struct uwb_notifs_handler */
-#include <linux/wlp.h>
-#include "../i1480-wlp.h"
-
-#undef i1480u_FLOW_CONTROL	/* Enable flow control code */
-
-/**
- * Basic flow control
- */
-enum {
-	i1480u_TX_INFLIGHT_MAX = 1000,
-	i1480u_TX_INFLIGHT_THRESHOLD = 100,
-};
-
-/** Maximum size of a transaction that we can tx/rx */
-enum {
-	/* Maximum packet size computed as follows: max UNTD header (8) +
-	 * i1480 RX header (8) + max Ethernet header and payload (4096) +
-	 * Padding added by skb_reserve (2) to make post Ethernet payload
-	 * start on 16 byte boundary*/
-	i1480u_MAX_RX_PKT_SIZE = 4114,
-	i1480u_MAX_FRG_SIZE = 512,
-	i1480u_RX_BUFS = 9,
-};
-
-
-/**
- * UNTD packet type
- *
- * We need to fragment any payload whose UNTD packet is going to be
- * bigger than i1480u_MAX_FRG_SIZE.
- */
-enum i1480u_pkt_type {
-	i1480u_PKT_FRAG_1ST = 0x1,
-	i1480u_PKT_FRAG_NXT = 0x0,
-	i1480u_PKT_FRAG_LST = 0x2,
-	i1480u_PKT_FRAG_CMP = 0x3
-};
-enum {
-	i1480u_PKT_NONE = 0x4,
-};
-
-/** USB Network Transfer Descriptor - common */
-struct untd_hdr {
-	u8     type;
-	__le16 len;
-} __attribute__((packed));
-
-static inline enum i1480u_pkt_type untd_hdr_type(const struct untd_hdr *hdr)
-{
-	return hdr->type & 0x03;
-}
-
-static inline int untd_hdr_rx_tx(const struct untd_hdr *hdr)
-{
-	return (hdr->type >> 2) & 0x01;
-}
-
-static inline void untd_hdr_set_type(struct untd_hdr *hdr, enum i1480u_pkt_type type)
-{
-	hdr->type = (hdr->type & ~0x03) | type;
-}
-
-static inline void untd_hdr_set_rx_tx(struct untd_hdr *hdr, int rx_tx)
-{
-	hdr->type = (hdr->type & ~0x04) | (rx_tx << 2);
-}
-
-
-/**
- * USB Network Transfer Descriptor - Complete Packet
- *
- * This is for a packet that is smaller (header + payload) than
- * i1480u_MAX_FRG_SIZE.
- *
- * @hdr.total_len is the size of the payload; the payload doesn't
- * count this header nor the padding, but includes the size of i1480
- * header.
- */
-struct untd_hdr_cmp {
-	struct untd_hdr	hdr;
-	u8		padding;
-} __attribute__((packed));
-
-
-/**
- * USB Network Transfer Descriptor - First fragment
- *
- * @hdr.len is the size of the *whole packet* (excluding UNTD
- * headers); @fragment_len is the size of the payload (excluding UNTD
- * headers, but including i1480 headers).
- */
-struct untd_hdr_1st {
-	struct untd_hdr	hdr;
-	__le16		fragment_len;
-	u8		padding[3];
-} __attribute__((packed));
-
-
-/**
- * USB Network Transfer Descriptor - Next / Last [Rest]
- *
- * @hdr.len is the size of the payload, not including headrs.
- */
-struct untd_hdr_rst {
-	struct untd_hdr	hdr;
-	u8		padding;
-} __attribute__((packed));
-
-
-/**
- * Transmission context
- *
- * Wraps all the stuff needed to track a pending/active tx
- * operation.
- */
-struct i1480u_tx {
-	struct list_head list_node;
-	struct i1480u *i1480u;
-	struct urb *urb;
-
-	struct sk_buff *skb;
-	struct wlp_tx_hdr *wlp_tx_hdr;
-
-	void *buf;	/* if NULL, no new buf was used */
-	size_t buf_size;
-};
-
-/**
- * Basic flow control
- *
- * We maintain a basic flow control counter. "count" how many TX URBs are
- * outstanding. Only allow "max"
- * TX URBs to be outstanding. If this value is reached the queue will be
- * stopped. The queue will be restarted when there are
- * "threshold" URBs outstanding.
- * Maintain a counter of how many time the TX queue needed to be restarted
- * due to the "max" being exceeded and the "threshold" reached again. The
- * timestamp "restart_ts" is to keep track from when the counter was last
- * queried (see sysfs handling of file wlp_tx_inflight).
- */
-struct i1480u_tx_inflight {
-	atomic_t count;
-	unsigned long max;
-	unsigned long threshold;
-	unsigned long restart_ts;
-	atomic_t restart_count;
-};
-
-/**
- * Instance of a i1480u WLP interface
- *
- * Keeps references to the USB device that wraps it, as well as it's
- * interface and associated UWB host controller. As well, it also
- * keeps a link to the netdevice for integration into the networking
- * stack.
- * We maintian separate error history for the tx and rx endpoints because
- * the implementation does not rely on locking - having one shared
- * structure between endpoints may cause problems. Adding locking to the
- * implementation will have higher cost than adding a separate structure.
- */
-struct i1480u {
-	struct usb_device *usb_dev;
-	struct usb_interface *usb_iface;
-	struct net_device *net_dev;
-
-	spinlock_t lock;
-
-	/* RX context handling */
-	struct sk_buff *rx_skb;
-	struct uwb_dev_addr rx_srcaddr;
-	size_t rx_untd_pkt_size;
-	struct i1480u_rx_buf {
-		struct i1480u *i1480u;	/* back pointer */
-		struct urb *urb;
-		struct sk_buff *data;	/* i1480u_MAX_RX_PKT_SIZE each */
-	} rx_buf[i1480u_RX_BUFS];	/* N bufs */
-
-	spinlock_t tx_list_lock;	/* TX context */
-	struct list_head tx_list;
-	u8 tx_stream;
-
-	struct stats lqe_stats, rssi_stats;	/* radio statistics */
-
-	/* Options we can set from sysfs */
-	struct wlp_options options;
-	struct uwb_notifs_handler uwb_notifs_handler;
-	struct edc tx_errors;
-	struct edc rx_errors;
-	struct wlp wlp;
-#ifdef i1480u_FLOW_CONTROL
-	struct urb *notif_urb;
-	struct edc notif_edc;		/* error density counter */
-	u8 notif_buffer[1];
-#endif
-	struct i1480u_tx_inflight tx_inflight;
-};
-
-/* Internal interfaces */
-extern void i1480u_rx_cb(struct urb *urb);
-extern int i1480u_rx_setup(struct i1480u *);
-extern void i1480u_rx_release(struct i1480u *);
-extern void i1480u_tx_release(struct i1480u *);
-extern int i1480u_xmit_frame(struct wlp *, struct sk_buff *,
-			     struct uwb_dev_addr *);
-extern void i1480u_stop_queue(struct wlp *);
-extern void i1480u_start_queue(struct wlp *);
-extern int i1480u_sysfs_setup(struct i1480u *);
-extern void i1480u_sysfs_release(struct i1480u *);
-
-/* netdev interface */
-extern int i1480u_open(struct net_device *);
-extern int i1480u_stop(struct net_device *);
-extern netdev_tx_t i1480u_hard_start_xmit(struct sk_buff *,
-						struct net_device *);
-extern void i1480u_tx_timeout(struct net_device *);
-extern int i1480u_set_config(struct net_device *, struct ifmap *);
-extern int i1480u_change_mtu(struct net_device *, int);
-extern void i1480u_uwb_notifs_cb(void *, struct uwb_dev *, enum uwb_notifs);
-
-/* bandwidth allocation callback */
-extern void  i1480u_bw_alloc_cb(struct uwb_rsv *);
-
-/* Sys FS */
-extern struct attribute_group i1480u_wlp_attr_group;
-
-#endif /* #ifndef __i1480u_wlp_h__ */

drivers/uwb/i1480/i1480u-wlp/lc.c

···
-/*
- * WUSB Wire Adapter: WLP interface
- * Driver for the Linux Network stack.
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- *
- * This implements a very simple network driver for the WLP USB
- * device that is associated to a UWB (Ultra Wide Band) host.
- *
- * This is seen as an interface of a composite device. Once the UWB
- * host has an association to another WLP capable device, the
- * networking interface (aka WLP) can start to send packets back and
- * forth.
- *
- * Limitations:
- *
- *  - Hand cranked; can't ifup the interface until there is an association
- *
- *  - BW allocation very simplistic [see i1480u_mas_set() and callees].
- *
- *
- * ROADMAP:
- *
- *   ENTRY POINTS (driver model):
- *
- *     i1480u_driver_{exit,init}(): initialization of the driver.
- *
- *     i1480u_probe(): called by the driver code when a device
- *                     matching 'i1480u_id_table' is connected.
- *
- *                     This allocs a netdev instance, inits with
- *                     i1480u_add(), then registers_netdev().
- *         i1480u_init()
- *         i1480u_add()
- *
- *     i1480u_disconnect(): device has been disconnected/module
- *                          is being removed.
- *         i1480u_rm()
- */
-#include <linux/gfp.h>
-#include <linux/if_arp.h>
-#include <linux/etherdevice.h>
-
-#include "i1480u-wlp.h"
-
-
-
-static inline
-void i1480u_init(struct i1480u *i1480u)
-{
-	/* nothing so far... doesn't it suck? */
-	spin_lock_init(&i1480u->lock);
-	INIT_LIST_HEAD(&i1480u->tx_list);
-	spin_lock_init(&i1480u->tx_list_lock);
-	wlp_options_init(&i1480u->options);
-	edc_init(&i1480u->tx_errors);
-	edc_init(&i1480u->rx_errors);
-#ifdef i1480u_FLOW_CONTROL
-	edc_init(&i1480u->notif_edc);
-#endif
-	stats_init(&i1480u->lqe_stats);
-	stats_init(&i1480u->rssi_stats);
-	wlp_init(&i1480u->wlp);
-}
-
-/**
- * Fill WLP device information structure
- *
- * The structure will contain a few character arrays, each ending with a
- * null terminated string. Each string has to fit (excluding terminating
- * character) into a specified range obtained from the WLP substack.
- *
- * It is still not clear exactly how this device information should be
- * obtained. Until we find out we use the USB device descriptor as backup, some
- * information elements have intuitive mappings, other not.
- */
-static
-void i1480u_fill_device_info(struct wlp *wlp, struct wlp_device_info *dev_info)
-{
-	struct i1480u *i1480u = container_of(wlp, struct i1480u, wlp);
-	struct usb_device *usb_dev = i1480u->usb_dev;
-	/* Treat device name and model name the same */
-	if (usb_dev->descriptor.iProduct) {
-		usb_string(usb_dev, usb_dev->descriptor.iProduct,
-			   dev_info->name, sizeof(dev_info->name));
-		usb_string(usb_dev, usb_dev->descriptor.iProduct,
-			   dev_info->model_name, sizeof(dev_info->model_name));
-	}
-	if (usb_dev->descriptor.iManufacturer)
-		usb_string(usb_dev, usb_dev->descriptor.iManufacturer,
-			   dev_info->manufacturer,
-			   sizeof(dev_info->manufacturer));
-	scnprintf(dev_info->model_nr, sizeof(dev_info->model_nr), "%04x",
-		  __le16_to_cpu(usb_dev->descriptor.bcdDevice));
-	if (usb_dev->descriptor.iSerialNumber)
-		usb_string(usb_dev, usb_dev->descriptor.iSerialNumber,
-			   dev_info->serial, sizeof(dev_info->serial));
-	/* FIXME: where should we obtain category? */
-	dev_info->prim_dev_type.category = cpu_to_le16(WLP_DEV_CAT_OTHER);
-	/* FIXME: Complete OUI and OUIsubdiv attributes */
-}
-
-#ifdef i1480u_FLOW_CONTROL
-/**
- * Callback for the notification endpoint
- *
- * This mostly controls the xon/xoff protocol. In case of hard error,
- * we stop the queue. If not, we always retry.
- */
-static
-void i1480u_notif_cb(struct urb *urb, struct pt_regs *regs)
-{
-	struct i1480u *i1480u = urb->context;
-	struct usb_interface *usb_iface = i1480u->usb_iface;
-	struct device *dev = &usb_iface->dev;
-	int result;
-
-	switch (urb->status) {
-	case 0:				/* Got valid data, do xon/xoff */
-		switch (i1480u->notif_buffer[0]) {
-		case 'N':
-			dev_err(dev, "XOFF STOPPING queue at %lu\n", jiffies);
-			netif_stop_queue(i1480u->net_dev);
-			break;
-		case 'A':
-			dev_err(dev, "XON STARTING queue at %lu\n", jiffies);
-			netif_start_queue(i1480u->net_dev);
-			break;
-		default:
-			dev_err(dev, "NEP: unknown data 0x%02hhx\n",
-				i1480u->notif_buffer[0]);
-		}
-		break;
-	case -ECONNRESET:		/* Controlled situation ... */
-	case -ENOENT:			/* we killed the URB... */
-		dev_err(dev, "NEP: URB reset/noent %d\n", urb->status);
-		goto error;
-	case -ESHUTDOWN:		/* going away! */
-		dev_err(dev, "NEP: URB down %d\n", urb->status);
-		goto error;
-	default:			/* Retry unless it gets ugly */
-		if (edc_inc(&i1480u->notif_edc, EDC_MAX_ERRORS,
-			    EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "NEP: URB max acceptable errors "
-				"exceeded; resetting device\n");
-			goto error_reset;
-		}
-		dev_err(dev, "NEP: URB error %d\n", urb->status);
-		break;
-	}
-	result = usb_submit_urb(urb, GFP_ATOMIC);
-	if (result < 0) {
-		dev_err(dev, "NEP: Can't resubmit URB: %d; resetting device\n",
-			result);
-		goto error_reset;
-	}
-	return;
-
-error_reset:
-	wlp_reset_all(&i1480-wlp);
-error:
-	netif_stop_queue(i1480u->net_dev);
-	return;
-}
-#endif
-
-static const struct net_device_ops i1480u_netdev_ops = {
-	.ndo_open	= i1480u_open,
-	.ndo_stop 	= i1480u_stop,
-	.ndo_start_xmit = i1480u_hard_start_xmit,
-	.ndo_tx_timeout = i1480u_tx_timeout,
-	.ndo_set_config = i1480u_set_config,
-	.ndo_change_mtu = i1480u_change_mtu,
-};
-
-static
-int i1480u_add(struct i1480u *i1480u, struct usb_interface *iface)
-{
-	int result = -ENODEV;
-	struct wlp *wlp = &i1480u->wlp;
-	struct usb_device *usb_dev = interface_to_usbdev(iface);
-	struct net_device *net_dev = i1480u->net_dev;
-	struct uwb_rc *rc;
-	struct uwb_dev *uwb_dev;
-#ifdef i1480u_FLOW_CONTROL
-	struct usb_endpoint_descriptor *epd;
-#endif
-
-	i1480u->usb_dev = usb_get_dev(usb_dev);
-	i1480u->usb_iface = iface;
-	rc = uwb_rc_get_by_grandpa(&i1480u->usb_dev->dev);
-	if (rc == NULL) {
-		dev_err(&iface->dev, "Cannot get associated UWB Radio "
-			"Controller\n");
-		goto out;
-	}
-	wlp->xmit_frame = i1480u_xmit_frame;
-	wlp->fill_device_info = i1480u_fill_device_info;
-	wlp->stop_queue = i1480u_stop_queue;
-	wlp->start_queue = i1480u_start_queue;
-	result = wlp_setup(wlp, rc, net_dev);
-	if (result < 0) {
-		dev_err(&iface->dev, "Cannot setup WLP\n");
-		goto error_wlp_setup;
-	}
-	result = 0;
-	ether_setup(net_dev);			/* make it an etherdevice */
-	uwb_dev = &rc->uwb_dev;
-	/* FIXME: hookup address change notifications? */
-
-	memcpy(net_dev->dev_addr, uwb_dev->mac_addr.data,
-	       sizeof(net_dev->dev_addr));
-
-	net_dev->hard_header_len = sizeof(struct untd_hdr_cmp)
-		+ sizeof(struct wlp_tx_hdr)
-		+ WLP_DATA_HLEN
-		+ ETH_HLEN;
-	net_dev->mtu = 3500;
-	net_dev->tx_queue_len = 20;		/* FIXME: maybe use 1000? */
-
-/*	net_dev->flags &= ~IFF_BROADCAST;	FIXME: BUG in firmware */
-	/* FIXME: multicast disabled */
-	net_dev->flags &= ~IFF_MULTICAST;
-	net_dev->features &= ~NETIF_F_SG;
-	net_dev->features &= ~NETIF_F_FRAGLIST;
-	/* All NETIF_F_*_CSUM disabled */
-	net_dev->features |= NETIF_F_HIGHDMA;
-	net_dev->watchdog_timeo = 5*HZ;		/* FIXME: a better default? */
-
-	net_dev->netdev_ops = &i1480u_netdev_ops;
-
-#ifdef i1480u_FLOW_CONTROL
-	/* Notification endpoint setup (submitted when we open the device) */
-	i1480u->notif_urb = usb_alloc_urb(0, GFP_KERNEL);
-	if (i1480u->notif_urb == NULL) {
-		dev_err(&iface->dev, "Unable to allocate notification URB\n");
-		result = -ENOMEM;
-		goto error_urb_alloc;
-	}
-	epd = &iface->cur_altsetting->endpoint[0].desc;
-	usb_fill_int_urb(i1480u->notif_urb, usb_dev,
-			 usb_rcvintpipe(usb_dev, epd->bEndpointAddress),
-			 i1480u->notif_buffer, sizeof(i1480u->notif_buffer),
-			 i1480u_notif_cb, i1480u, epd->bInterval);
-
-#endif
-
-	i1480u->tx_inflight.max = i1480u_TX_INFLIGHT_MAX;
-	i1480u->tx_inflight.threshold = i1480u_TX_INFLIGHT_THRESHOLD;
-	i1480u->tx_inflight.restart_ts = jiffies;
-	usb_set_intfdata(iface, i1480u);
-	return result;
-
-#ifdef i1480u_FLOW_CONTROL
-error_urb_alloc:
-#endif
-	wlp_remove(wlp);
-error_wlp_setup:
-	uwb_rc_put(rc);
-out:
-	usb_put_dev(i1480u->usb_dev);
-	return result;
-}
-
-static void i1480u_rm(struct i1480u *i1480u)
-{
-	struct uwb_rc *rc = i1480u->wlp.rc;
-	usb_set_intfdata(i1480u->usb_iface, NULL);
-#ifdef i1480u_FLOW_CONTROL
-	usb_kill_urb(i1480u->notif_urb);
-	usb_free_urb(i1480u->notif_urb);
-#endif
-	wlp_remove(&i1480u->wlp);
-	uwb_rc_put(rc);
-	usb_put_dev(i1480u->usb_dev);
-}
-
-/** Just setup @net_dev's i1480u private data */
-static void i1480u_netdev_setup(struct net_device *net_dev)
-{
-	struct i1480u *i1480u = netdev_priv(net_dev);
-	/* Initialize @i1480u */
-	memset(i1480u, 0, sizeof(*i1480u));
-	i1480u_init(i1480u);
-}
-
-/**
- * Probe a i1480u interface and register it
- *
- * @iface:   USB interface to link to
- * @id:      USB class/subclass/protocol id
- * @returns: 0 if ok, < 0 errno code on error.
- *
- * Does basic housekeeping stuff and then allocs a netdev with space
- * for the i1480u  data. Initializes, registers in i1480u, registers in
- * netdev, ready to go.
- */
-static int i1480u_probe(struct usb_interface *iface,
-			const struct usb_device_id *id)
-{
-	int result;
-	struct net_device *net_dev;
-	struct device *dev = &iface->dev;
-	struct i1480u *i1480u;
-
-	/* Allocate instance [calls i1480u_netdev_setup() on it] */
-	result = -ENOMEM;
-	net_dev = alloc_netdev(sizeof(*i1480u), "wlp%d", i1480u_netdev_setup);
-	if (net_dev == NULL) {
-		dev_err(dev, "no memory for network device instance\n");
-		goto error_alloc_netdev;
-	}
-	SET_NETDEV_DEV(net_dev, dev);
-	i1480u = netdev_priv(net_dev);
-	i1480u->net_dev = net_dev;
-	result = i1480u_add(i1480u, iface);	/* Now setup all the wlp stuff */
-	if (result < 0) {
-		dev_err(dev, "cannot add i1480u device: %d\n", result);
-		goto error_i1480u_add;
-	}
-	result = register_netdev(net_dev);	/* Okey dokey, bring it up */
-	if (result < 0) {
-		dev_err(dev, "cannot register network device: %d\n", result);
-		goto error_register_netdev;
-	}
-	i1480u_sysfs_setup(i1480u);
-	if (result < 0)
-		goto error_sysfs_init;
-	return 0;
-
-error_sysfs_init:
-	unregister_netdev(net_dev);
-error_register_netdev:
-	i1480u_rm(i1480u);
-error_i1480u_add:
-	free_netdev(net_dev);
-error_alloc_netdev:
-	return result;
-}
-
-
-/**
- * Disconect a i1480u from the system.
- *
- * i1480u_stop() has been called before, so al the rx and tx contexts
- * have been taken down already. Make sure the queue is stopped,
- * unregister netdev and i1480u, free and kill.
- */
-static void i1480u_disconnect(struct usb_interface *iface)
-{
-	struct i1480u *i1480u;
-	struct net_device *net_dev;
-
-	i1480u = usb_get_intfdata(iface);
-	net_dev = i1480u->net_dev;
-	netif_stop_queue(net_dev);
-#ifdef i1480u_FLOW_CONTROL
-	usb_kill_urb(i1480u->notif_urb);
-#endif
-	i1480u_sysfs_release(i1480u);
-	unregister_netdev(net_dev);
-	i1480u_rm(i1480u);
-	free_netdev(net_dev);
-}
-
-static struct usb_device_id i1480u_id_table[] = {
-	{
-		.match_flags = USB_DEVICE_ID_MATCH_DEVICE \
-				|  USB_DEVICE_ID_MATCH_DEV_INFO \
-				|  USB_DEVICE_ID_MATCH_INT_INFO,
-		.idVendor = 0x8086,
-		.idProduct = 0x0c3b,
-		.bDeviceClass = 0xef,
-		.bDeviceSubClass = 0x02,
-		.bDeviceProtocol = 0x02,
-		.bInterfaceClass = 0xff,
-		.bInterfaceSubClass = 0xff,
-		.bInterfaceProtocol = 0xff,
-	},
-	{},
-};
-MODULE_DEVICE_TABLE(usb, i1480u_id_table);
-
-static struct usb_driver i1480u_driver = {
-	.name =		KBUILD_MODNAME,
-	.probe =	i1480u_probe,
-	.disconnect =	i1480u_disconnect,
-	.id_table =	i1480u_id_table,
-};
-
-static int __init i1480u_driver_init(void)
-{
-	return usb_register(&i1480u_driver);
-}
-module_init(i1480u_driver_init);
-
-
-static void __exit i1480u_driver_exit(void)
-{
-	usb_deregister(&i1480u_driver);
-}
-module_exit(i1480u_driver_exit);
-
-MODULE_AUTHOR("Inaky Perez-Gonzalez <[e-mail]>");
-MODULE_DESCRIPTION("i1480 Wireless UWB Link WLP networking for USB");
-MODULE_LICENSE("GPL");

drivers/uwb/i1480/i1480u-wlp/netdev.c

···
-/*
- * WUSB Wire Adapter: WLP interface
- * Driver for the Linux Network stack.
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- *
- * Implementation of the netdevice linkage (except tx and rx related stuff).
- *
- * ROADMAP:
- *
- *   ENTRY POINTS (Net device):
- *
- *     i1480u_open(): Called when we ifconfig up the interface;
- *                    associates to a UWB host controller, reserves
- *                    bandwidth (MAS), sets up RX USB URB and starts
- *                    the queue.
- *
- *     i1480u_stop(): Called when we ifconfig down a interface;
- *                    reverses _open().
- *
- *     i1480u_set_config():
- */
-
-#include <linux/slab.h>
-#include <linux/if_arp.h>
-#include <linux/etherdevice.h>
-
-#include "i1480u-wlp.h"
-
-struct i1480u_cmd_set_ip_mas {
-	struct uwb_rccb     rccb;
-	struct uwb_dev_addr addr;
-	u8                  stream;
-	u8                  owner;
-	u8                  type;	/* enum uwb_drp_type */
-	u8                  baMAS[32];
-} __attribute__((packed));
-
-
-static
-int i1480u_set_ip_mas(
-	struct uwb_rc *rc,
-	const struct uwb_dev_addr *dstaddr,
-	u8 stream, u8 owner, u8 type, unsigned long *mas)
-{
-
-	int result;
-	struct i1480u_cmd_set_ip_mas *cmd;
-	struct uwb_rc_evt_confirm reply;
-
-	result = -ENOMEM;
-	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
-	if (cmd == NULL)
-		goto error_kzalloc;
-	cmd->rccb.bCommandType = 0xfd;
-	cmd->rccb.wCommand = cpu_to_le16(0x000e);
-	cmd->addr = *dstaddr;
-	cmd->stream = stream;
-	cmd->owner = owner;
-	cmd->type = type;
-	if (mas == NULL)
-		memset(cmd->baMAS, 0x00, sizeof(cmd->baMAS));
-	else
-		memcpy(cmd->baMAS, mas, sizeof(cmd->baMAS));
-	reply.rceb.bEventType = 0xfd;
-	reply.rceb.wEvent = cpu_to_le16(0x000e);
-	result = uwb_rc_cmd(rc, "SET-IP-MAS", &cmd->rccb, sizeof(*cmd),
-			    &reply.rceb, sizeof(reply));
-	if (result < 0)
-		goto error_cmd;
-	if (reply.bResultCode != UWB_RC_RES_FAIL) {
-		dev_err(&rc->uwb_dev.dev,
-			"SET-IP-MAS: command execution failed: %d\n",
-			reply.bResultCode);
-		result = -EIO;
-	}
-error_cmd:
-	kfree(cmd);
-error_kzalloc:
-	return result;
-}
-
-/*
- * Inform a WLP interface of a MAS reservation
- *
- * @rc is assumed refcnted.
- */
-/* FIXME: detect if remote device is WLP capable? */
-static int i1480u_mas_set_dev(struct uwb_dev *uwb_dev, struct uwb_rc *rc,
-			      u8 stream, u8 owner, u8 type, unsigned long *mas)
-{
-	int result = 0;
-	struct device *dev = &rc->uwb_dev.dev;
-
-	result = i1480u_set_ip_mas(rc, &uwb_dev->dev_addr, stream, owner,
-				   type, mas);
-	if (result < 0) {
-		char rcaddrbuf[UWB_ADDR_STRSIZE], devaddrbuf[UWB_ADDR_STRSIZE];
-		uwb_dev_addr_print(rcaddrbuf, sizeof(rcaddrbuf),
-				   &rc->uwb_dev.dev_addr);
-		uwb_dev_addr_print(devaddrbuf, sizeof(devaddrbuf),
-				   &uwb_dev->dev_addr);
-		dev_err(dev, "Set IP MAS (%s to %s) failed: %d\n",
-			rcaddrbuf, devaddrbuf, result);
-	}
-	return result;
-}
-
-/**
- * Called by bandwidth allocator when change occurs in reservation.
- *
- * @rsv:     The reservation that is being established, modified, or
- *           terminated.
- *
- * When a reservation is established, modified, or terminated the upper layer
- * (WLP here) needs set/update the currently available Media Access Slots
- * that can be use for IP traffic.
- *
- * Our action taken during failure depends on how the reservation is being
- * changed:
- * - if reservation is being established we do nothing if we cannot set the
- *   new MAS to be used
- * - if reservation is being terminated we revert back to PCA whether the
- *   SET IP MAS command succeeds or not.
- */
-void i1480u_bw_alloc_cb(struct uwb_rsv *rsv)
-{
-	int result = 0;
-	struct i1480u *i1480u = rsv->pal_priv;
-	struct device *dev = &i1480u->usb_iface->dev;
-	struct uwb_dev *target_dev = rsv->target.dev;
-	struct uwb_rc *rc = i1480u->wlp.rc;
-	u8 stream = rsv->stream;
-	int type = rsv->type;
-	int is_owner = rsv->owner == &rc->uwb_dev;
-	unsigned long *bmp = rsv->mas.bm;
-
-	dev_err(dev, "WLP callback called - sending set ip mas\n");
-	/*user cannot change options while setting configuration*/
-	mutex_lock(&i1480u->options.mutex);
-	switch (rsv->state) {
-	case UWB_RSV_STATE_T_ACCEPTED:
-	case UWB_RSV_STATE_O_ESTABLISHED:
-		result = i1480u_mas_set_dev(target_dev, rc, stream, is_owner,
-					type, bmp);
-		if (result < 0) {
-			dev_err(dev, "MAS reservation failed: %d\n", result);
-			goto out;
-		}
-		if (is_owner) {
-			wlp_tx_hdr_set_delivery_id_type(&i1480u->options.def_tx_hdr,
-							WLP_DRP | stream);
-			wlp_tx_hdr_set_rts_cts(&i1480u->options.def_tx_hdr, 0);
-		}
-		break;
-	case UWB_RSV_STATE_NONE:
-		/* revert back to PCA */
-		result = i1480u_mas_set_dev(target_dev, rc, stream, is_owner,
-					    type, bmp);
-		if (result < 0)
-			dev_err(dev, "MAS reservation failed: %d\n", result);
-		/* Revert to PCA even though SET IP MAS failed. */
-		wlp_tx_hdr_set_delivery_id_type(&i1480u->options.def_tx_hdr,
-						i1480u->options.pca_base_priority);
-		wlp_tx_hdr_set_rts_cts(&i1480u->options.def_tx_hdr, 1);
-		break;
-	default:
-		dev_err(dev, "unexpected WLP reservation state: %s (%d).\n",
-			uwb_rsv_state_str(rsv->state), rsv->state);
-		break;
-	}
-out:
-	mutex_unlock(&i1480u->options.mutex);
-	return;
-}
-
-/**
- *
- * Called on 'ifconfig up'
- */
-int i1480u_open(struct net_device *net_dev)
-{
-	int result;
-	struct i1480u *i1480u = netdev_priv(net_dev);
-	struct wlp *wlp = &i1480u->wlp;
-	struct uwb_rc *rc;
-	struct device *dev = &i1480u->usb_iface->dev;
-
-	rc = wlp->rc;
-	result = i1480u_rx_setup(i1480u);		/* Alloc RX stuff */
-	if (result < 0)
-		goto error_rx_setup;
-
-	result = uwb_radio_start(&wlp->pal);
-	if (result < 0)
-		goto error_radio_start;
-
-	netif_wake_queue(net_dev);
-#ifdef i1480u_FLOW_CONTROL
-	result = usb_submit_urb(i1480u->notif_urb, GFP_KERNEL);
-	if (result < 0) {
-		dev_err(dev, "Can't submit notification URB: %d\n", result);
-		goto error_notif_urb_submit;
-	}
-#endif
-	/* Interface is up with an address, now we can create WSS */
-	result = wlp_wss_setup(net_dev, &wlp->wss);
-	if (result < 0) {
-		dev_err(dev, "Can't create WSS: %d. \n", result);
-		goto error_wss_setup;
-	}
-	return 0;
-error_wss_setup:
-#ifdef i1480u_FLOW_CONTROL
-	usb_kill_urb(i1480u->notif_urb);
-error_notif_urb_submit:
-#endif
-	uwb_radio_stop(&wlp->pal);
-error_radio_start:
-	netif_stop_queue(net_dev);
-	i1480u_rx_release(i1480u);
-error_rx_setup:
-	return result;
-}
-
-
-/**
- * Called on 'ifconfig down'
- */
-int i1480u_stop(struct net_device *net_dev)
-{
-	struct i1480u *i1480u = netdev_priv(net_dev);
-	struct wlp *wlp = &i1480u->wlp;
-
-	BUG_ON(wlp->rc == NULL);
-	wlp_wss_remove(&wlp->wss);
-	netif_carrier_off(net_dev);
-#ifdef i1480u_FLOW_CONTROL
-	usb_kill_urb(i1480u->notif_urb);
-#endif
-	netif_stop_queue(net_dev);
-	uwb_radio_stop(&wlp->pal);
-	i1480u_rx_release(i1480u);
-	i1480u_tx_release(i1480u);
-	return 0;
-}
-
-/**
- *
- * Change the interface config--we probably don't have to do anything.
- */
-int i1480u_set_config(struct net_device *net_dev, struct ifmap *map)
-{
-	int result;
-	struct i1480u *i1480u = netdev_priv(net_dev);
-	BUG_ON(i1480u->wlp.rc == NULL);
-	result = 0;
-	return result;
-}
-
-/**
- * Change the MTU of the interface
- */
-int i1480u_change_mtu(struct net_device *net_dev, int mtu)
-{
-	static union {
-		struct wlp_tx_hdr tx;
-		struct wlp_rx_hdr rx;
-	} i1480u_all_hdrs;
-
-	if (mtu < ETH_HLEN)	/* We encap eth frames */
-		return -ERANGE;
-	if (mtu > 4000 - sizeof(i1480u_all_hdrs))
-		return -ERANGE;
-	net_dev->mtu = mtu;
-	return 0;
-}
-
-/**
- * Stop the network queue
- *
- * Enable WLP substack to stop network queue. We also set the flow control
- * threshold at this time to prevent the flow control from restarting the
- * queue.
- *
- * we are loosing the current threshold value here ... FIXME?
- */
-void i1480u_stop_queue(struct wlp *wlp)
-{
-	struct i1480u *i1480u = container_of(wlp, struct i1480u, wlp);
-	struct net_device *net_dev = i1480u->net_dev;
-	i1480u->tx_inflight.threshold = 0;
-	netif_stop_queue(net_dev);
-}
-
-/**
- * Start the network queue
- *
- * Enable WLP substack to start network queue. Also re-enable the flow
- * control to manage the queue again.
- *
- * We re-enable the flow control by storing the default threshold in the
- * flow control threshold. This means that if the user modified the
- * threshold before the queue was stopped and restarted that information
- * will be lost. FIXME?
- */
-void i1480u_start_queue(struct wlp *wlp)
-{
-	struct i1480u *i1480u = container_of(wlp, struct i1480u, wlp);
-	struct net_device *net_dev = i1480u->net_dev;
-	i1480u->tx_inflight.threshold = i1480u_TX_INFLIGHT_THRESHOLD;
-	netif_start_queue(net_dev);
-}

drivers/uwb/i1480/i1480u-wlp/rx.c

···
-/*
- * WUSB Wire Adapter: WLP interface
- * Driver for the Linux Network stack.
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * i1480u's RX handling is simple. i1480u will send the received
- * network packets broken up in fragments; 1 to N fragments make a
- * packet, we assemble them together and deliver the packet with netif_rx().
- *
- * Beacuse each USB transfer is a *single* fragment (except when the
- * transfer contains a first fragment), each URB called thus
- * back contains one or two fragments. So we queue N URBs, each with its own
- * fragment buffer. When a URB is done, we process it (adding to the
- * current skb from the fragment buffer until complete). Once
- * processed, we requeue the URB. There is always a bunch of URBs
- * ready to take data, so the intergap should be minimal.
- *
- * An URB's transfer buffer is the data field of a socket buffer. This
- * reduces copying as data can be passed directly to network layer. If a
- * complete packet or 1st fragment is received the URB's transfer buffer is
- * taken away from it and used to send data to the network layer. In this
- * case a new transfer buffer is allocated to the URB before being requeued.
- * If a "NEXT" or "LAST" fragment is received, the fragment contents is
- * appended to the RX packet under construction and the transfer buffer
- * is reused. To be able to use this buffer to assemble complete packets
- * we set each buffer's size to that of the MAX ethernet packet that can
- * be received. There is thus room for improvement in memory usage.
- *
- * When the max tx fragment size increases, we should be able to read
- * data into the skbs directly with very simple code.
- *
- * ROADMAP:
- *
- *   ENTRY POINTS:
- *
- *     i1480u_rx_setup(): setup RX context [from i1480u_open()]
- *
- *     i1480u_rx_release(): release RX context [from i1480u_stop()]
- *
- *     i1480u_rx_cb(): called when the RX USB URB receives a
- *                     packet. It removes the header and pushes it up
- *                     the Linux netdev stack with netif_rx().
- *
- *       i1480u_rx_buffer()
- *         i1480u_drop() and i1480u_fix()
- *         i1480u_skb_deliver
- *
- */
-
-#include <linux/gfp.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include "i1480u-wlp.h"
-
-/*
- * Setup the RX context
- *
- * Each URB is provided with a transfer_buffer that is the data field
- * of a new socket buffer.
- */
-int i1480u_rx_setup(struct i1480u *i1480u)
-{
-	int result, cnt;
-	struct device *dev = &i1480u->usb_iface->dev;
-	struct net_device *net_dev = i1480u->net_dev;
-	struct usb_endpoint_descriptor *epd;
-	struct sk_buff *skb;
-
-	/* Alloc RX stuff */
-	i1480u->rx_skb = NULL;	/* not in process of receiving packet */
-	result = -ENOMEM;
-	epd = &i1480u->usb_iface->cur_altsetting->endpoint[1].desc;
-	for (cnt = 0; cnt < i1480u_RX_BUFS; cnt++) {
-		struct i1480u_rx_buf *rx_buf = &i1480u->rx_buf[cnt];
-		rx_buf->i1480u = i1480u;
-		skb = dev_alloc_skb(i1480u_MAX_RX_PKT_SIZE);
-		if (!skb) {
-			dev_err(dev,
-				"RX: cannot allocate RX buffer %d\n", cnt);
-			result = -ENOMEM;
-			goto error;
-		}
-		skb->dev = net_dev;
-		skb->ip_summed = CHECKSUM_NONE;
-		skb_reserve(skb, 2);
-		rx_buf->data = skb;
-		rx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
-		if (unlikely(rx_buf->urb == NULL)) {
-			dev_err(dev, "RX: cannot allocate URB %d\n", cnt);
-			result = -ENOMEM;
-			goto error;
-		}
-		usb_fill_bulk_urb(rx_buf->urb, i1480u->usb_dev,
-			  usb_rcvbulkpipe(i1480u->usb_dev, epd->bEndpointAddress),
-			  rx_buf->data->data, i1480u_MAX_RX_PKT_SIZE - 2,
-			  i1480u_rx_cb, rx_buf);
-		result = usb_submit_urb(rx_buf->urb, GFP_NOIO);
-		if (unlikely(result < 0)) {
-			dev_err(dev, "RX: cannot submit URB %d: %d\n",
-				cnt, result);
-			goto error;
-		}
-	}
-	return 0;
-
-error:
-	i1480u_rx_release(i1480u);
-	return result;
-}
-
-
-/* Release resources associated to the rx context */
-void i1480u_rx_release(struct i1480u *i1480u)
-{
-	int cnt;
-	for (cnt = 0; cnt < i1480u_RX_BUFS; cnt++) {
-		if (i1480u->rx_buf[cnt].data)
-			dev_kfree_skb(i1480u->rx_buf[cnt].data);
-		if (i1480u->rx_buf[cnt].urb) {
-			usb_kill_urb(i1480u->rx_buf[cnt].urb);
-			usb_free_urb(i1480u->rx_buf[cnt].urb);
-		}
-	}
-	if (i1480u->rx_skb != NULL)
-		dev_kfree_skb(i1480u->rx_skb);
-}
-
-static
-void i1480u_rx_unlink_urbs(struct i1480u *i1480u)
-{
-	int cnt;
-	for (cnt = 0; cnt < i1480u_RX_BUFS; cnt++) {
-		if (i1480u->rx_buf[cnt].urb)
-			usb_unlink_urb(i1480u->rx_buf[cnt].urb);
-	}
-}
-
-/* Fix an out-of-sequence packet */
-#define i1480u_fix(i1480u, msg...)			\
-do {							\
-	if (printk_ratelimit())				\
-		dev_err(&i1480u->usb_iface->dev, msg);	\
-	dev_kfree_skb_irq(i1480u->rx_skb);		\
-	i1480u->rx_skb = NULL;				\
-	i1480u->rx_untd_pkt_size = 0;			\
-} while (0)
-
-
-/* Drop an out-of-sequence packet */
-#define i1480u_drop(i1480u, msg...)			\
-do {							\
-	if (printk_ratelimit())				\
-		dev_err(&i1480u->usb_iface->dev, msg);	\
-	i1480u->net_dev->stats.rx_dropped++;			\
-} while (0)
-
-
-
-
-/* Finalizes setting up the SKB and delivers it
- *
- * We first pass the incoming frame to WLP substack for verification. It
- * may also be a WLP association frame in which case WLP will take over the
- * processing. If WLP does not take it over it will still verify it, if the
- * frame is invalid the skb will be freed by WLP and we will not continue
- * parsing.
- * */
-static
-void i1480u_skb_deliver(struct i1480u *i1480u)
-{
-	int should_parse;
-	struct net_device *net_dev = i1480u->net_dev;
-	struct device *dev = &i1480u->usb_iface->dev;
-
-	should_parse = wlp_receive_frame(dev, &i1480u->wlp, i1480u->rx_skb,
-					 &i1480u->rx_srcaddr);
-	if (!should_parse)
-		goto out;
-	i1480u->rx_skb->protocol = eth_type_trans(i1480u->rx_skb, net_dev);
-	net_dev->stats.rx_packets++;
-	net_dev->stats.rx_bytes += i1480u->rx_untd_pkt_size;
-
-	netif_rx(i1480u->rx_skb);		/* deliver */
-out:
-	i1480u->rx_skb = NULL;
-	i1480u->rx_untd_pkt_size = 0;
-}
-
-
-/*
- * Process a buffer of data received from the USB RX endpoint
- *
- * First fragment arrives with next or last fragment. All other fragments
- * arrive alone.
- *
- * /me hates long functions.
- */
-static
-void i1480u_rx_buffer(struct i1480u_rx_buf *rx_buf)
-{
-	unsigned pkt_completed = 0;	/* !0 when we got all pkt fragments */
-	size_t untd_hdr_size, untd_frg_size;
-	size_t i1480u_hdr_size;
-	struct wlp_rx_hdr *i1480u_hdr = NULL;
-
-	struct i1480u *i1480u = rx_buf->i1480u;
-	struct sk_buff *skb = rx_buf->data;
-	int size_left = rx_buf->urb->actual_length;
-	void *ptr = rx_buf->urb->transfer_buffer; /* also rx_buf->data->data */
-	struct untd_hdr *untd_hdr;
-
-	struct net_device *net_dev = i1480u->net_dev;
-	struct device *dev = &i1480u->usb_iface->dev;
-	struct sk_buff *new_skb;
-
-#if 0
-	dev_fnstart(dev,
-		    "(i1480u %p ptr %p size_left %zu)\n", i1480u, ptr, size_left);
-	dev_err(dev, "RX packet, %zu bytes\n", size_left);
-	dump_bytes(dev, ptr, size_left);
-#endif
-	i1480u_hdr_size = sizeof(struct wlp_rx_hdr);
-
-	while (size_left > 0) {
-		if (pkt_completed) {
-			i1480u_drop(i1480u, "RX: fragment follows completed"
-					 "packet in same buffer. Dropping\n");
-			break;
-		}
-		untd_hdr = ptr;
-		if (size_left < sizeof(*untd_hdr)) {	/*  Check the UNTD header */
-			i1480u_drop(i1480u, "RX: short UNTD header! Dropping\n");
-			goto out;
-		}
-		if (unlikely(untd_hdr_rx_tx(untd_hdr) == 0)) {	/* Paranoia: TX set? */
-			i1480u_drop(i1480u, "RX: TX bit set! Dropping\n");
-			goto out;
-		}
-		switch (untd_hdr_type(untd_hdr)) {	/* Check the UNTD header type */
-		case i1480u_PKT_FRAG_1ST: {
-			struct untd_hdr_1st *untd_hdr_1st = (void *) untd_hdr;
-			dev_dbg(dev, "1st fragment\n");
-			untd_hdr_size = sizeof(struct untd_hdr_1st);
-			if (i1480u->rx_skb != NULL)
-				i1480u_fix(i1480u, "RX: 1st fragment out of "
-					"sequence! Fixing\n");
-			if (size_left < untd_hdr_size + i1480u_hdr_size) {
-				i1480u_drop(i1480u, "RX: short 1st fragment! "
-					"Dropping\n");
-				goto out;
-			}
-			i1480u->rx_untd_pkt_size = le16_to_cpu(untd_hdr->len)
-						 - i1480u_hdr_size;
-			untd_frg_size = le16_to_cpu(untd_hdr_1st->fragment_len);
-			if (size_left < untd_hdr_size + untd_frg_size) {
-				i1480u_drop(i1480u,
-					    "RX: short payload! Dropping\n");
-				goto out;
-			}
-			i1480u->rx_skb = skb;
-			i1480u_hdr = (void *) untd_hdr_1st + untd_hdr_size;
-			i1480u->rx_srcaddr = i1480u_hdr->srcaddr;
-			skb_put(i1480u->rx_skb, untd_hdr_size + untd_frg_size);
-			skb_pull(i1480u->rx_skb, untd_hdr_size + i1480u_hdr_size);
-			stats_add_sample(&i1480u->lqe_stats, (s8) i1480u_hdr->LQI - 7);
-			stats_add_sample(&i1480u->rssi_stats, i1480u_hdr->RSSI + 18);
-			rx_buf->data = NULL; /* need to create new buffer */
-			break;
-		}
-		case i1480u_PKT_FRAG_NXT: {
-			dev_dbg(dev, "nxt fragment\n");
-			untd_hdr_size = sizeof(struct untd_hdr_rst);
-			if (i1480u->rx_skb == NULL) {
-				i1480u_drop(i1480u, "RX: next fragment out of "
-					    "sequence! Dropping\n");
-				goto out;
-			}
-			if (size_left < untd_hdr_size) {
-				i1480u_drop(i1480u, "RX: short NXT fragment! "
-					    "Dropping\n");
-				goto out;
-			}
-			untd_frg_size = le16_to_cpu(untd_hdr->len);
-			if (size_left < untd_hdr_size + untd_frg_size) {
-				i1480u_drop(i1480u,
-					    "RX: short payload! Dropping\n");
-				goto out;
-			}
-			memmove(skb_put(i1480u->rx_skb, untd_frg_size),
-					ptr + untd_hdr_size, untd_frg_size);
-			break;
-		}
-		case i1480u_PKT_FRAG_LST: {
-			dev_dbg(dev, "Lst fragment\n");
-			untd_hdr_size = sizeof(struct untd_hdr_rst);
-			if (i1480u->rx_skb == NULL) {
-				i1480u_drop(i1480u, "RX: last fragment out of "
-					    "sequence! Dropping\n");
-				goto out;
-			}
-			if (size_left < untd_hdr_size) {
-				i1480u_drop(i1480u, "RX: short LST fragment! "
-					    "Dropping\n");
-				goto out;
-			}
-			untd_frg_size = le16_to_cpu(untd_hdr->len);
-			if (size_left < untd_frg_size + untd_hdr_size) {
-				i1480u_drop(i1480u,
-					    "RX: short payload! Dropping\n");
-				goto out;
-			}
-			memmove(skb_put(i1480u->rx_skb, untd_frg_size),
-					ptr + untd_hdr_size, untd_frg_size);
-			pkt_completed = 1;
-			break;
-		}
-		case i1480u_PKT_FRAG_CMP: {
-			dev_dbg(dev, "cmp fragment\n");
-			untd_hdr_size = sizeof(struct untd_hdr_cmp);
-			if (i1480u->rx_skb != NULL)
-				i1480u_fix(i1480u, "RX: fix out-of-sequence CMP"
-					   " fragment!\n");
-			if (size_left < untd_hdr_size + i1480u_hdr_size) {
-				i1480u_drop(i1480u, "RX: short CMP fragment! "
-					    "Dropping\n");
-				goto out;
-			}
-			i1480u->rx_untd_pkt_size = le16_to_cpu(untd_hdr->len);
-			untd_frg_size = i1480u->rx_untd_pkt_size;
-			if (size_left < i1480u->rx_untd_pkt_size + untd_hdr_size) {
-				i1480u_drop(i1480u,
-					    "RX: short payload! Dropping\n");
-				goto out;
-			}
-			i1480u->rx_skb = skb;
-			i1480u_hdr = (void *) untd_hdr + untd_hdr_size;
-			i1480u->rx_srcaddr = i1480u_hdr->srcaddr;
-			stats_add_sample(&i1480u->lqe_stats, (s8) i1480u_hdr->LQI - 7);
-			stats_add_sample(&i1480u->rssi_stats, i1480u_hdr->RSSI + 18);
-			skb_put(i1480u->rx_skb, untd_hdr_size + i1480u->rx_untd_pkt_size);
-			skb_pull(i1480u->rx_skb, untd_hdr_size + i1480u_hdr_size);
-			rx_buf->data = NULL;	/* for hand off skb to network stack */
-			pkt_completed = 1;
-			i1480u->rx_untd_pkt_size -= i1480u_hdr_size; /* accurate stat */
-			break;
-		}
-		default:
-			i1480u_drop(i1480u, "RX: unknown packet type %u! "
-				    "Dropping\n", untd_hdr_type(untd_hdr));
-			goto out;
-		}
-		size_left -= untd_hdr_size + untd_frg_size;
-		if (size_left > 0)
-			ptr += untd_hdr_size + untd_frg_size;
-	}
-	if (pkt_completed)
-		i1480u_skb_deliver(i1480u);
-out:
-	/* recreate needed RX buffers*/
-	if (rx_buf->data == NULL) {
-		/* buffer is being used to receive packet, create new */
-		new_skb = dev_alloc_skb(i1480u_MAX_RX_PKT_SIZE);
-		if (!new_skb) {
-			if (printk_ratelimit())
-				dev_err(dev,
-				"RX: cannot allocate RX buffer\n");
-		} else {
-			new_skb->dev = net_dev;
-			new_skb->ip_summed = CHECKSUM_NONE;
-			skb_reserve(new_skb, 2);
-			rx_buf->data = new_skb;
-		}
-	}
-	return;
-}
-
-
-/*
- * Called when an RX URB has finished receiving or has found some kind
- * of error condition.
- *
- * LIMITATIONS:
- *
- *  - We read USB-transfers, each transfer contains a SINGLE fragment
- *    (can contain a complete packet, or a 1st, next, or last fragment
- *    of a packet).
- *    Looks like a transfer can contain more than one fragment (07/18/06)
- *
- *  - Each transfer buffer is the size of the maximum packet size (minus
- *    headroom), i1480u_MAX_PKT_SIZE - 2
- *
- *  - We always read the full USB-transfer, no partials.
- *
- *  - Each transfer is read directly into a skb. This skb will be used to
- *    send data to the upper layers if it is the first fragment or a complete
- *    packet. In the other cases the data will be copied from the skb to
- *    another skb that is being prepared for the upper layers from a prev
- *    first fragment.
- *
- * It is simply too much of a pain. Gosh, there should be a unified
- * SG infrastructure for *everything* [so that I could declare a SG
- * buffer, pass it to USB for receiving, append some space to it if
- * I wish, receive more until I have the whole chunk, adapt
- * pointers on each fragment to remove hardware headers and then
- * attach that to an skbuff and netif_rx()].
- */
-void i1480u_rx_cb(struct urb *urb)
-{
-	int result;
-	int do_parse_buffer = 1;
-	struct i1480u_rx_buf *rx_buf = urb->context;
-	struct i1480u *i1480u = rx_buf->i1480u;
-	struct device *dev = &i1480u->usb_iface->dev;
-	unsigned long flags;
-	u8 rx_buf_idx = rx_buf - i1480u->rx_buf;
-
-	switch (urb->status) {
-	case 0:
-		break;
-	case -ECONNRESET:	/* Not an error, but a controlled situation; */
-	case -ENOENT:		/* (we killed the URB)...so, no broadcast */
-	case -ESHUTDOWN:	/* going away! */
-		dev_err(dev, "RX URB[%u]: goind down %d\n",
-			rx_buf_idx, urb->status);
-		goto error;
-	default:
-		dev_err(dev, "RX URB[%u]: unknown status %d\n",
-			rx_buf_idx, urb->status);
-		if (edc_inc(&i1480u->rx_errors, EDC_MAX_ERRORS,
-					EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "RX: max acceptable errors exceeded,"
-					" resetting device.\n");
-			i1480u_rx_unlink_urbs(i1480u);
-			wlp_reset_all(&i1480u->wlp);
-			goto error;
-		}
-		do_parse_buffer = 0;
-		break;
-	}
-	spin_lock_irqsave(&i1480u->lock, flags);
-	/* chew the data fragments, extract network packets */
-	if (do_parse_buffer) {
-		i1480u_rx_buffer(rx_buf);
-		if (rx_buf->data) {
-			rx_buf->urb->transfer_buffer = rx_buf->data->data;
-			result = usb_submit_urb(rx_buf->urb, GFP_ATOMIC);
-			if (result < 0) {
-				dev_err(dev, "RX URB[%u]: cannot submit %d\n",
-					rx_buf_idx, result);
-			}
-		}
-	}
-	spin_unlock_irqrestore(&i1480u->lock, flags);
-error:
-	return;
-}
-

drivers/uwb/i1480/i1480u-wlp/sysfs.c

···
-/*
- * WUSB Wire Adapter: WLP interface
- * Sysfs interfaces
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- */
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/device.h>
-
-#include "i1480u-wlp.h"
-
-
-/**
- *
- * @dev: Class device from the net_device; assumed refcnted.
- *
- * Yes, I don't lock--we assume it is refcounted and I am getting a
- * single byte value that is kind of atomic to read.
- */
-ssize_t uwb_phy_rate_show(const struct wlp_options *options, char *buf)
-{
-	return sprintf(buf, "%u\n",
-		       wlp_tx_hdr_phy_rate(&options->def_tx_hdr));
-}
-EXPORT_SYMBOL_GPL(uwb_phy_rate_show);
-
-
-ssize_t uwb_phy_rate_store(struct wlp_options *options,
-			   const char *buf, size_t size)
-{
-	ssize_t result;
-	unsigned rate;
-
-	result = sscanf(buf, "%u\n", &rate);
-	if (result != 1) {
-		result = -EINVAL;
-		goto out;
-	}
-	result = -EINVAL;
-	if (rate >= UWB_PHY_RATE_INVALID)
-		goto out;
-	wlp_tx_hdr_set_phy_rate(&options->def_tx_hdr, rate);
-	result = 0;
-out:
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(uwb_phy_rate_store);
-
-
-ssize_t uwb_rts_cts_show(const struct wlp_options *options, char *buf)
-{
-	return sprintf(buf, "%u\n",
-		       wlp_tx_hdr_rts_cts(&options->def_tx_hdr));
-}
-EXPORT_SYMBOL_GPL(uwb_rts_cts_show);
-
-
-ssize_t uwb_rts_cts_store(struct wlp_options *options,
-			  const char *buf, size_t size)
-{
-	ssize_t result;
-	unsigned value;
-
-	result = sscanf(buf, "%u\n", &value);
-	if (result != 1) {
-		result = -EINVAL;
-		goto out;
-	}
-	result = -EINVAL;
-	wlp_tx_hdr_set_rts_cts(&options->def_tx_hdr, !!value);
-	result = 0;
-out:
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(uwb_rts_cts_store);
-
-
-ssize_t uwb_ack_policy_show(const struct wlp_options *options, char *buf)
-{
-	return sprintf(buf, "%u\n",
-		       wlp_tx_hdr_ack_policy(&options->def_tx_hdr));
-}
-EXPORT_SYMBOL_GPL(uwb_ack_policy_show);
-
-
-ssize_t uwb_ack_policy_store(struct wlp_options *options,
-			     const char *buf, size_t size)
-{
-	ssize_t result;
-	unsigned value;
-
-	result = sscanf(buf, "%u\n", &value);
-	if (result != 1 || value > UWB_ACK_B_REQ) {
-		result = -EINVAL;
-		goto out;
-	}
-	wlp_tx_hdr_set_ack_policy(&options->def_tx_hdr, value);
-	result = 0;
-out:
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(uwb_ack_policy_store);
-
-
-/**
- * Show the PCA base priority.
- *
- * We can access without locking, as the value is (for now) orthogonal
- * to other values.
- */
-ssize_t uwb_pca_base_priority_show(const struct wlp_options *options,
-				   char *buf)
-{
-	return sprintf(buf, "%u\n",
-		       options->pca_base_priority);
-}
-EXPORT_SYMBOL_GPL(uwb_pca_base_priority_show);
-
-
-/**
- * Set the PCA base priority.
- *
- * We can access without locking, as the value is (for now) orthogonal
- * to other values.
- */
-ssize_t uwb_pca_base_priority_store(struct wlp_options *options,
-				    const char *buf, size_t size)
-{
-	ssize_t result = -EINVAL;
-	u8 pca_base_priority;
-
-	result = sscanf(buf, "%hhu\n", &pca_base_priority);
-	if (result != 1) {
-		result = -EINVAL;
-		goto out;
-	}
-	result = -EINVAL;
-	if (pca_base_priority >= 8)
-		goto out;
-	options->pca_base_priority = pca_base_priority;
-	/* Update TX header if we are currently using PCA. */
-	if (result >= 0 && (wlp_tx_hdr_delivery_id_type(&options->def_tx_hdr) & WLP_DRP) == 0)
-		wlp_tx_hdr_set_delivery_id_type(&options->def_tx_hdr, options->pca_base_priority);
-	result = 0;
-out:
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(uwb_pca_base_priority_store);
-
-/**
- * Show current inflight values
- *
- * Will print the current MAX and THRESHOLD values for the basic flow
- * control. In addition it will report how many times the TX queue needed
- * to be restarted since the last time this query was made.
- */
-static ssize_t wlp_tx_inflight_show(struct i1480u_tx_inflight *inflight,
-				    char *buf)
-{
-	ssize_t result;
-	unsigned long sec_elapsed = (jiffies - inflight->restart_ts)/HZ;
-	unsigned long restart_count = atomic_read(&inflight->restart_count);
-
-	result = scnprintf(buf, PAGE_SIZE, "%lu %lu %d %lu %lu %lu\n"
-			   "#read: threshold max inflight_count restarts "
-			   "seconds restarts/sec\n"
-			   "#write: threshold max\n",
-			   inflight->threshold, inflight->max,
-			   atomic_read(&inflight->count),
-			   restart_count, sec_elapsed,
-			   sec_elapsed == 0 ? 0 : restart_count/sec_elapsed);
-	inflight->restart_ts = jiffies;
-	atomic_set(&inflight->restart_count, 0);
-	return result;
-}
-
-static
-ssize_t wlp_tx_inflight_store(struct i1480u_tx_inflight *inflight,
-				const char *buf, size_t size)
-{
-	unsigned long in_threshold, in_max;
-	ssize_t result;
-	result = sscanf(buf, "%lu %lu", &in_threshold, &in_max);
-	if (result != 2)
-		return -EINVAL;
-	if (in_max <= in_threshold)
-		return -EINVAL;
-	inflight->max = in_max;
-	inflight->threshold = in_threshold;
-	return size;
-}
-/*
- * Glue (or function adaptors) for accesing info on sysfs
- *
- * [we need this indirection because the PCI driver does almost the
- * same]
- *
- * Linux 2.6.21 changed how 'struct netdevice' does attributes (from
- * having a 'struct class_dev' to having a 'struct device'). That is
- * quite of a pain.
- *
- * So we try to abstract that here. i1480u_SHOW() and i1480u_STORE()
- * create adaptors for extracting the 'struct i1480u' from a 'struct
- * dev' and calling a function for doing a sysfs operation (as we have
- * them factorized already). i1480u_ATTR creates the attribute file
- * (CLASS_DEVICE_ATTR or DEVICE_ATTR) and i1480u_ATTR_NAME produces a
- * class_device_attr_NAME or device_attr_NAME (for group registration).
- */
-
-#define i1480u_SHOW(name, fn, param)				\
-static ssize_t i1480u_show_##name(struct device *dev,		\
-				  struct device_attribute *attr,\
-				  char *buf)			\
-{								\
-	struct i1480u *i1480u = netdev_priv(to_net_dev(dev));	\
-	return fn(&i1480u->param, buf);				\
-}
-
-#define i1480u_STORE(name, fn, param)				\
-static ssize_t i1480u_store_##name(struct device *dev,		\
-				   struct device_attribute *attr,\
-				   const char *buf, size_t size)\
-{								\
-	struct i1480u *i1480u = netdev_priv(to_net_dev(dev));	\
-	return fn(&i1480u->param, buf, size);			\
-}
-
-#define i1480u_ATTR(name, perm) static DEVICE_ATTR(name, perm,  \
-					     i1480u_show_##name,\
-					     i1480u_store_##name)
-
-#define i1480u_ATTR_SHOW(name) static DEVICE_ATTR(name,		\
-					S_IRUGO,		\
-					i1480u_show_##name, NULL)
-
-#define i1480u_ATTR_NAME(a) (dev_attr_##a)
-
-
-/*
- * Sysfs adaptors
- */
-i1480u_SHOW(uwb_phy_rate, uwb_phy_rate_show, options);
-i1480u_STORE(uwb_phy_rate, uwb_phy_rate_store, options);
-i1480u_ATTR(uwb_phy_rate, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(uwb_rts_cts, uwb_rts_cts_show, options);
-i1480u_STORE(uwb_rts_cts, uwb_rts_cts_store, options);
-i1480u_ATTR(uwb_rts_cts, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(uwb_ack_policy, uwb_ack_policy_show, options);
-i1480u_STORE(uwb_ack_policy, uwb_ack_policy_store, options);
-i1480u_ATTR(uwb_ack_policy, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(uwb_pca_base_priority, uwb_pca_base_priority_show, options);
-i1480u_STORE(uwb_pca_base_priority, uwb_pca_base_priority_store, options);
-i1480u_ATTR(uwb_pca_base_priority, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_eda, wlp_eda_show, wlp);
-i1480u_STORE(wlp_eda, wlp_eda_store, wlp);
-i1480u_ATTR(wlp_eda, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_uuid, wlp_uuid_show, wlp);
-i1480u_STORE(wlp_uuid, wlp_uuid_store, wlp);
-i1480u_ATTR(wlp_uuid, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_name, wlp_dev_name_show, wlp);
-i1480u_STORE(wlp_dev_name, wlp_dev_name_store, wlp);
-i1480u_ATTR(wlp_dev_name, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_manufacturer, wlp_dev_manufacturer_show, wlp);
-i1480u_STORE(wlp_dev_manufacturer, wlp_dev_manufacturer_store, wlp);
-i1480u_ATTR(wlp_dev_manufacturer, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_model_name, wlp_dev_model_name_show, wlp);
-i1480u_STORE(wlp_dev_model_name, wlp_dev_model_name_store, wlp);
-i1480u_ATTR(wlp_dev_model_name, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_model_nr, wlp_dev_model_nr_show, wlp);
-i1480u_STORE(wlp_dev_model_nr, wlp_dev_model_nr_store, wlp);
-i1480u_ATTR(wlp_dev_model_nr, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_serial, wlp_dev_serial_show, wlp);
-i1480u_STORE(wlp_dev_serial, wlp_dev_serial_store, wlp);
-i1480u_ATTR(wlp_dev_serial, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_prim_category, wlp_dev_prim_category_show, wlp);
-i1480u_STORE(wlp_dev_prim_category, wlp_dev_prim_category_store, wlp);
-i1480u_ATTR(wlp_dev_prim_category, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_prim_OUI, wlp_dev_prim_OUI_show, wlp);
-i1480u_STORE(wlp_dev_prim_OUI, wlp_dev_prim_OUI_store, wlp);
-i1480u_ATTR(wlp_dev_prim_OUI, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_prim_OUI_sub, wlp_dev_prim_OUI_sub_show, wlp);
-i1480u_STORE(wlp_dev_prim_OUI_sub, wlp_dev_prim_OUI_sub_store, wlp);
-i1480u_ATTR(wlp_dev_prim_OUI_sub, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_dev_prim_subcat, wlp_dev_prim_subcat_show, wlp);
-i1480u_STORE(wlp_dev_prim_subcat, wlp_dev_prim_subcat_store, wlp);
-i1480u_ATTR(wlp_dev_prim_subcat, S_IRUGO | S_IWUSR);
-
-i1480u_SHOW(wlp_neighborhood, wlp_neighborhood_show, wlp);
-i1480u_ATTR_SHOW(wlp_neighborhood);
-
-i1480u_SHOW(wss_activate, wlp_wss_activate_show, wlp.wss);
-i1480u_STORE(wss_activate, wlp_wss_activate_store, wlp.wss);
-i1480u_ATTR(wss_activate, S_IRUGO | S_IWUSR);
-
-/*
- * Show the (min, max, avg) Line Quality Estimate (LQE, in dB) as over
- * the last 256 received WLP frames (ECMA-368 13.3).
- *
- * [the -7dB that have to be substracted from the LQI to make the LQE
- * are already taken into account].
- */
-i1480u_SHOW(wlp_lqe, stats_show, lqe_stats);
-i1480u_STORE(wlp_lqe, stats_store, lqe_stats);
-i1480u_ATTR(wlp_lqe, S_IRUGO | S_IWUSR);
-
-/*
- * Show the Receive Signal Strength Indicator averaged over all the
- * received WLP frames (ECMA-368 13.3). Still is not clear what
- * this value is, but is kind of a percentage of the signal strength
- * at the antenna.
- */
-i1480u_SHOW(wlp_rssi, stats_show, rssi_stats);
-i1480u_STORE(wlp_rssi, stats_store, rssi_stats);
-i1480u_ATTR(wlp_rssi, S_IRUGO | S_IWUSR);
-
-/**
- * We maintain a basic flow control counter. "count" how many TX URBs are
- * outstanding. Only allow "max"
- * TX URBs to be outstanding. If this value is reached the queue will be
- * stopped. The queue will be restarted when there are
- * "threshold" URBs outstanding.
- */
-i1480u_SHOW(wlp_tx_inflight, wlp_tx_inflight_show, tx_inflight);
-i1480u_STORE(wlp_tx_inflight, wlp_tx_inflight_store, tx_inflight);
-i1480u_ATTR(wlp_tx_inflight, S_IRUGO | S_IWUSR);
-
-static struct attribute *i1480u_attrs[] = {
-	&i1480u_ATTR_NAME(uwb_phy_rate).attr,
-	&i1480u_ATTR_NAME(uwb_rts_cts).attr,
-	&i1480u_ATTR_NAME(uwb_ack_policy).attr,
-	&i1480u_ATTR_NAME(uwb_pca_base_priority).attr,
-	&i1480u_ATTR_NAME(wlp_lqe).attr,
-	&i1480u_ATTR_NAME(wlp_rssi).attr,
-	&i1480u_ATTR_NAME(wlp_eda).attr,
-	&i1480u_ATTR_NAME(wlp_uuid).attr,
-	&i1480u_ATTR_NAME(wlp_dev_name).attr,
-	&i1480u_ATTR_NAME(wlp_dev_manufacturer).attr,
-	&i1480u_ATTR_NAME(wlp_dev_model_name).attr,
-	&i1480u_ATTR_NAME(wlp_dev_model_nr).attr,
-	&i1480u_ATTR_NAME(wlp_dev_serial).attr,
-	&i1480u_ATTR_NAME(wlp_dev_prim_category).attr,
-	&i1480u_ATTR_NAME(wlp_dev_prim_OUI).attr,
-	&i1480u_ATTR_NAME(wlp_dev_prim_OUI_sub).attr,
-	&i1480u_ATTR_NAME(wlp_dev_prim_subcat).attr,
-	&i1480u_ATTR_NAME(wlp_neighborhood).attr,
-	&i1480u_ATTR_NAME(wss_activate).attr,
-	&i1480u_ATTR_NAME(wlp_tx_inflight).attr,
-	NULL,
-};
-
-static struct attribute_group i1480u_attr_group = {
-	.name = NULL,	/* we want them in the same directory */
-	.attrs = i1480u_attrs,
-};
-
-int i1480u_sysfs_setup(struct i1480u *i1480u)
-{
-	int result;
-	struct device *dev = &i1480u->usb_iface->dev;
-	result = sysfs_create_group(&i1480u->net_dev->dev.kobj,
-				    &i1480u_attr_group);
-	if (result < 0)
-		dev_err(dev, "cannot initialize sysfs attributes: %d\n",
-			result);
-	return result;
-}
-
-
-void i1480u_sysfs_release(struct i1480u *i1480u)
-{
-	sysfs_remove_group(&i1480u->net_dev->dev.kobj,
-			   &i1480u_attr_group);
-}

drivers/uwb/i1480/i1480u-wlp/tx.c

···
-/*
- * WUSB Wire Adapter: WLP interface
- * Deal with TX (massaging data to transmit, handling it)
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * Transmission engine. Get an skb, create from that a WLP transmit
- * context, add a WLP TX header (which we keep prefilled in the
- * device's instance), fill out the target-specific fields and
- * fire it.
- *
- * ROADMAP:
- *
- *   Entry points:
- *
- *     i1480u_tx_release(): called by i1480u_disconnect() to release
- *                          pending tx contexts.
- *
- *     i1480u_tx_cb(): callback for TX contexts (USB URBs)
- *       i1480u_tx_destroy():
- *
- *     i1480u_tx_timeout(): called for timeout handling from the
- *                          network stack.
- *
- *     i1480u_hard_start_xmit(): called for transmitting an skb from
- *                               the network stack. Will interact with WLP
- *                               substack to verify and prepare frame.
- *       i1480u_xmit_frame(): actual transmission on hardware
- *
- *         i1480u_tx_create()	    Creates TX context
- *            i1480u_tx_create_1()    For packets in 1 fragment
- *            i1480u_tx_create_n()    For packets in >1 fragments
- *
- * TODO:
- *
- * - FIXME: rewrite using usb_sg_*(), add asynch support to
- *          usb_sg_*(). It might not make too much sense as most of
- *          the times the MTU will be smaller than one page...
- */
-
-#include <linux/slab.h>
-#include "i1480u-wlp.h"
-
-enum {
-	/* This is only for Next and Last TX packets */
-	i1480u_MAX_PL_SIZE = i1480u_MAX_FRG_SIZE
-		- sizeof(struct untd_hdr_rst),
-};
-
-/* Free resources allocated to a i1480u tx context. */
-static
-void i1480u_tx_free(struct i1480u_tx *wtx)
-{
-	kfree(wtx->buf);
-	if (wtx->skb)
-		dev_kfree_skb_irq(wtx->skb);
-	usb_free_urb(wtx->urb);
-	kfree(wtx);
-}
-
-static
-void i1480u_tx_destroy(struct i1480u *i1480u, struct i1480u_tx *wtx)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&i1480u->tx_list_lock, flags);	/* not active any more */
-	list_del(&wtx->list_node);
-	i1480u_tx_free(wtx);
-	spin_unlock_irqrestore(&i1480u->tx_list_lock, flags);
-}
-
-static
-void i1480u_tx_unlink_urbs(struct i1480u *i1480u)
-{
-	unsigned long flags;
-	struct i1480u_tx *wtx, *next;
-
-	spin_lock_irqsave(&i1480u->tx_list_lock, flags);
-	list_for_each_entry_safe(wtx, next, &i1480u->tx_list, list_node) {
-		usb_unlink_urb(wtx->urb);
-	}
-	spin_unlock_irqrestore(&i1480u->tx_list_lock, flags);
-}
-
-
-/*
- * Callback for a completed tx USB URB.
- *
- * TODO:
- *
- * - FIXME: recover errors more gracefully
- * - FIXME: handle NAKs (I dont think they come here) for flow ctl
- */
-static
-void i1480u_tx_cb(struct urb *urb)
-{
-	struct i1480u_tx *wtx = urb->context;
-	struct i1480u *i1480u = wtx->i1480u;
-	struct net_device *net_dev = i1480u->net_dev;
-	struct device *dev = &i1480u->usb_iface->dev;
-	unsigned long flags;
-
-	switch (urb->status) {
-	case 0:
-		spin_lock_irqsave(&i1480u->lock, flags);
-		net_dev->stats.tx_packets++;
-		net_dev->stats.tx_bytes += urb->actual_length;
-		spin_unlock_irqrestore(&i1480u->lock, flags);
-		break;
-	case -ECONNRESET:	/* Not an error, but a controlled situation; */
-	case -ENOENT:		/* (we killed the URB)...so, no broadcast */
-		dev_dbg(dev, "notif endp: reset/noent %d\n", urb->status);
-		netif_stop_queue(net_dev);
-		break;
-	case -ESHUTDOWN:	/* going away! */
-		dev_dbg(dev, "notif endp: down %d\n", urb->status);
-		netif_stop_queue(net_dev);
-		break;
-	default:
-		dev_err(dev, "TX: unknown URB status %d\n", urb->status);
-		if (edc_inc(&i1480u->tx_errors, EDC_MAX_ERRORS,
-					EDC_ERROR_TIMEFRAME)) {
-			dev_err(dev, "TX: max acceptable errors exceeded."
-					"Reset device.\n");
-			netif_stop_queue(net_dev);
-			i1480u_tx_unlink_urbs(i1480u);
-			wlp_reset_all(&i1480u->wlp);
-		}
-		break;
-	}
-	i1480u_tx_destroy(i1480u, wtx);
-	if (atomic_dec_return(&i1480u->tx_inflight.count)
-	    <= i1480u->tx_inflight.threshold
-	    && netif_queue_stopped(net_dev)
-	    && i1480u->tx_inflight.threshold != 0) {
-		netif_start_queue(net_dev);
-		atomic_inc(&i1480u->tx_inflight.restart_count);
-	}
-	return;
-}
-
-
-/*
- * Given a buffer that doesn't fit in a single fragment, create an
- * scatter/gather structure for delivery to the USB pipe.
- *
- * Implements functionality of i1480u_tx_create().
- *
- * @wtx:	tx descriptor
- * @skb:	skb to send
- * @gfp_mask:	gfp allocation mask
- * @returns:    Pointer to @wtx if ok, NULL on error.
- *
- * Sorry, TOO LONG a function, but breaking it up is kind of hard
- *
- * This will break the buffer in chunks smaller than
- * i1480u_MAX_FRG_SIZE (including the header) and add proper headers
- * to each:
- *
- *   1st header           \
- *   i1480 tx header      |  fragment 1
- *   fragment data        /
- *   nxt header           \  fragment 2
- *   fragment data        /
- *   ..
- *   ..
- *   last header          \  fragment 3
- *   last fragment data   /
- *
- * This does not fill the i1480 TX header, it is left up to the
- * caller to do that; you can get it from @wtx->wlp_tx_hdr.
- *
- * This function consumes the skb unless there is an error.
- */
-static
-int i1480u_tx_create_n(struct i1480u_tx *wtx, struct sk_buff *skb,
-		       gfp_t gfp_mask)
-{
-	int result;
-	void *pl;
-	size_t pl_size;
-
-	void *pl_itr, *buf_itr;
-	size_t pl_size_left, frgs, pl_size_1st, frg_pl_size = 0;
-	struct untd_hdr_1st *untd_hdr_1st;
-	struct wlp_tx_hdr *wlp_tx_hdr;
-	struct untd_hdr_rst *untd_hdr_rst;
-
-	wtx->skb = NULL;
-	pl = skb->data;
-	pl_itr = pl;
-	pl_size = skb->len;
-	pl_size_left = pl_size;	/* payload size */
-	/* First fragment; fits as much as i1480u_MAX_FRG_SIZE minus
-	 * the headers */
-	pl_size_1st = i1480u_MAX_FRG_SIZE
-		- sizeof(struct untd_hdr_1st) - sizeof(struct wlp_tx_hdr);
-	BUG_ON(pl_size_1st > pl_size);
-	pl_size_left -= pl_size_1st;
-	/* The rest have an smaller header (no i1480 TX header). We
-	 * need to break up the payload in blocks smaller than
-	 * i1480u_MAX_PL_SIZE (payload excluding header). */
-	frgs = (pl_size_left + i1480u_MAX_PL_SIZE - 1) / i1480u_MAX_PL_SIZE;
-	/* Allocate space for the new buffer. In this new buffer we'll
-	 * place the headers followed by the data fragment, headers,
-	 * data fragments, etc..
-	 */
-	result = -ENOMEM;
-	wtx->buf_size = sizeof(*untd_hdr_1st)
-		+ sizeof(*wlp_tx_hdr)
-		+ frgs * sizeof(*untd_hdr_rst)
-		+ pl_size;
-	wtx->buf = kmalloc(wtx->buf_size, gfp_mask);
-	if (wtx->buf == NULL)
-		goto error_buf_alloc;
-
-	buf_itr = wtx->buf;		/* We got the space, let's fill it up */
-	/* Fill 1st fragment */
-	untd_hdr_1st = buf_itr;
-	buf_itr += sizeof(*untd_hdr_1st);
-	untd_hdr_set_type(&untd_hdr_1st->hdr, i1480u_PKT_FRAG_1ST);
-	untd_hdr_set_rx_tx(&untd_hdr_1st->hdr, 0);
-	untd_hdr_1st->hdr.len = cpu_to_le16(pl_size + sizeof(*wlp_tx_hdr));
-	untd_hdr_1st->fragment_len =
-		cpu_to_le16(pl_size_1st + sizeof(*wlp_tx_hdr));
-	memset(untd_hdr_1st->padding, 0, sizeof(untd_hdr_1st->padding));
-	/* Set up i1480 header info */
-	wlp_tx_hdr = wtx->wlp_tx_hdr = buf_itr;
-	buf_itr += sizeof(*wlp_tx_hdr);
-	/* Copy the first fragment */
-	memcpy(buf_itr, pl_itr, pl_size_1st);
-	pl_itr += pl_size_1st;
-	buf_itr += pl_size_1st;
-
-	/* Now do each remaining fragment */
-	result = -EINVAL;
-	while (pl_size_left > 0) {
-		if (buf_itr + sizeof(*untd_hdr_rst) - wtx->buf
-		    > wtx->buf_size) {
-			printk(KERN_ERR "BUG: no space for header\n");
-			goto error_bug;
-		}
-		untd_hdr_rst = buf_itr;
-		buf_itr += sizeof(*untd_hdr_rst);
-		if (pl_size_left > i1480u_MAX_PL_SIZE) {
-			frg_pl_size = i1480u_MAX_PL_SIZE;
-			untd_hdr_set_type(&untd_hdr_rst->hdr, i1480u_PKT_FRAG_NXT);
-		} else {
-			frg_pl_size = pl_size_left;
-			untd_hdr_set_type(&untd_hdr_rst->hdr, i1480u_PKT_FRAG_LST);
-		}
-		untd_hdr_set_rx_tx(&untd_hdr_rst->hdr, 0);
-		untd_hdr_rst->hdr.len = cpu_to_le16(frg_pl_size);
-		untd_hdr_rst->padding = 0;
-		if (buf_itr + frg_pl_size - wtx->buf
-		    > wtx->buf_size) {
-			printk(KERN_ERR "BUG: no space for payload\n");
-			goto error_bug;
-		}
-		memcpy(buf_itr, pl_itr, frg_pl_size);
-		buf_itr += frg_pl_size;
-		pl_itr += frg_pl_size;
-		pl_size_left -= frg_pl_size;
-	}
-	dev_kfree_skb_irq(skb);
-	return 0;
-
-error_bug:
-	printk(KERN_ERR
-	       "BUG: skb %u bytes\n"
-	       "BUG: frg_pl_size %zd i1480u_MAX_FRG_SIZE %u\n"
-	       "BUG: buf_itr %zu buf_size %zu pl_size_left %zu\n",
-	       skb->len,
-	       frg_pl_size, i1480u_MAX_FRG_SIZE,
-	       buf_itr - wtx->buf, wtx->buf_size, pl_size_left);
-
-	kfree(wtx->buf);
-error_buf_alloc:
-	return result;
-}
-
-
-/*
- * Given a buffer that fits in a single fragment, fill out a @wtx
- * struct for transmitting it down the USB pipe.
- *
- * Uses the fact that we have space reserved in front of the skbuff
- * for hardware headers :]
- *
- * This does not fill the i1480 TX header, it is left up to the
- * caller to do that; you can get it from @wtx->wlp_tx_hdr.
- *
- * @pl:		pointer to payload data
- * @pl_size:    size of the payuload
- *
- * This function does not consume the @skb.
- */
-static
-int i1480u_tx_create_1(struct i1480u_tx *wtx, struct sk_buff *skb,
-		       gfp_t gfp_mask)
-{
-	struct untd_hdr_cmp *untd_hdr_cmp;
-	struct wlp_tx_hdr *wlp_tx_hdr;
-
-	wtx->buf = NULL;
-	wtx->skb = skb;
-	BUG_ON(skb_headroom(skb) < sizeof(*wlp_tx_hdr));
-	wlp_tx_hdr = (void *) __skb_push(skb, sizeof(*wlp_tx_hdr));
-	wtx->wlp_tx_hdr = wlp_tx_hdr;
-	BUG_ON(skb_headroom(skb) < sizeof(*untd_hdr_cmp));
-	untd_hdr_cmp = (void *) __skb_push(skb, sizeof(*untd_hdr_cmp));
-
-	untd_hdr_set_type(&untd_hdr_cmp->hdr, i1480u_PKT_FRAG_CMP);
-	untd_hdr_set_rx_tx(&untd_hdr_cmp->hdr, 0);
-	untd_hdr_cmp->hdr.len = cpu_to_le16(skb->len - sizeof(*untd_hdr_cmp));
-	untd_hdr_cmp->padding = 0;
-	return 0;
-}
-
-
-/*
- * Given a skb to transmit, massage it to become palatable for the TX pipe
- *
- * This will break the buffer in chunks smaller than
- * i1480u_MAX_FRG_SIZE and add proper headers to each.
- *
- *   1st header           \
- *   i1480 tx header      |  fragment 1
- *   fragment data        /
- *   nxt header           \  fragment 2
- *   fragment data        /
- *   ..
- *   ..
- *   last header          \  fragment 3
- *   last fragment data   /
- *
- * Each fragment will be always smaller or equal to i1480u_MAX_FRG_SIZE.
- *
- * If the first fragment is smaller than i1480u_MAX_FRG_SIZE, then the
- * following is composed:
- *
- *   complete header      \
- *   i1480 tx header      | single fragment
- *   packet data          /
- *
- * We were going to use s/g support, but because the interface is
- * synch and at the end there is plenty of overhead to do it, it
- * didn't seem that worth for data that is going to be smaller than
- * one page.
- */
-static
-struct i1480u_tx *i1480u_tx_create(struct i1480u *i1480u,
-				   struct sk_buff *skb, gfp_t gfp_mask)
-{
-	int result;
-	struct usb_endpoint_descriptor *epd;
-	int usb_pipe;
-	unsigned long flags;
-
-	struct i1480u_tx *wtx;
-	const size_t pl_max_size =
-		i1480u_MAX_FRG_SIZE - sizeof(struct untd_hdr_cmp)
-		- sizeof(struct wlp_tx_hdr);
-
-	wtx = kmalloc(sizeof(*wtx), gfp_mask);
-	if (wtx == NULL)
-		goto error_wtx_alloc;
-	wtx->urb = usb_alloc_urb(0, gfp_mask);
-	if (wtx->urb == NULL)
-		goto error_urb_alloc;
-	epd = &i1480u->usb_iface->cur_altsetting->endpoint[2].desc;
-	usb_pipe = usb_sndbulkpipe(i1480u->usb_dev, epd->bEndpointAddress);
-	/* Fits in a single complete packet or need to split? */
-	if (skb->len > pl_max_size) {
-		result = i1480u_tx_create_n(wtx, skb, gfp_mask);
-		if (result < 0)
-			goto error_create;
-		usb_fill_bulk_urb(wtx->urb, i1480u->usb_dev, usb_pipe,
-				  wtx->buf, wtx->buf_size, i1480u_tx_cb, wtx);
-	} else {
-		result = i1480u_tx_create_1(wtx, skb, gfp_mask);
-		if (result < 0)
-			goto error_create;
-		usb_fill_bulk_urb(wtx->urb, i1480u->usb_dev, usb_pipe,
-				  skb->data, skb->len, i1480u_tx_cb, wtx);
-	}
-	spin_lock_irqsave(&i1480u->tx_list_lock, flags);
-	list_add(&wtx->list_node, &i1480u->tx_list);
-	spin_unlock_irqrestore(&i1480u->tx_list_lock, flags);
-	return wtx;
-
-error_create:
-	kfree(wtx->urb);
-error_urb_alloc:
-	kfree(wtx);
-error_wtx_alloc:
-	return NULL;
-}
-
-/*
- * Actual fragmentation and transmission of frame
- *
- * @wlp:  WLP substack data structure
- * @skb:  To be transmitted
- * @dst:  Device address of destination
- * @returns: 0 on success, <0 on failure
- *
- * This function can also be called directly (not just from
- * hard_start_xmit), so we also check here if the interface is up before
- * taking sending anything.
- */
-int i1480u_xmit_frame(struct wlp *wlp, struct sk_buff *skb,
-		      struct uwb_dev_addr *dst)
-{
-	int result = -ENXIO;
-	struct i1480u *i1480u = container_of(wlp, struct i1480u, wlp);
-	struct device *dev = &i1480u->usb_iface->dev;
-	struct net_device *net_dev = i1480u->net_dev;
-	struct i1480u_tx *wtx;
-	struct wlp_tx_hdr *wlp_tx_hdr;
-	static unsigned char dev_bcast[2] = { 0xff, 0xff };
-
-	BUG_ON(i1480u->wlp.rc == NULL);
-	if ((net_dev->flags & IFF_UP) == 0)
-		goto out;
-	result = -EBUSY;
-	if (atomic_read(&i1480u->tx_inflight.count) >= i1480u->tx_inflight.max) {
-		netif_stop_queue(net_dev);
-		goto error_max_inflight;
-	}
-	result = -ENOMEM;
-	wtx = i1480u_tx_create(i1480u, skb, GFP_ATOMIC);
-	if (unlikely(wtx == NULL)) {
-		if (printk_ratelimit())
-			dev_err(dev, "TX: no memory for WLP TX URB,"
-				"dropping packet (in flight %d)\n",
-				atomic_read(&i1480u->tx_inflight.count));
-		netif_stop_queue(net_dev);
-		goto error_wtx_alloc;
-	}
-	wtx->i1480u = i1480u;
-	/* Fill out the i1480 header; @i1480u->def_tx_hdr read without
-	 * locking. We do so because they are kind of orthogonal to
-	 * each other (and thus not changed in an atomic batch).
-	 * The ETH header is right after the WLP TX header. */
-	wlp_tx_hdr = wtx->wlp_tx_hdr;
-	*wlp_tx_hdr = i1480u->options.def_tx_hdr;
-	wlp_tx_hdr->dstaddr = *dst;
-	if (!memcmp(&wlp_tx_hdr->dstaddr, dev_bcast, sizeof(dev_bcast))
-	    && (wlp_tx_hdr_delivery_id_type(wlp_tx_hdr) & WLP_DRP)) {
-		/*Broadcast message directed to DRP host. Send as best effort
-		 * on PCA. */
-		wlp_tx_hdr_set_delivery_id_type(wlp_tx_hdr, i1480u->options.pca_base_priority);
-	}
-
-	result = usb_submit_urb(wtx->urb, GFP_ATOMIC);		/* Go baby */
-	if (result < 0) {
-		dev_err(dev, "TX: cannot submit URB: %d\n", result);
-		/* We leave the freeing of skb to calling function */
-		wtx->skb = NULL;
-		goto error_tx_urb_submit;
-	}
-	atomic_inc(&i1480u->tx_inflight.count);
-	net_dev->trans_start = jiffies;
-	return result;
-
-error_tx_urb_submit:
-	i1480u_tx_destroy(i1480u, wtx);
-error_wtx_alloc:
-error_max_inflight:
-out:
-	return result;
-}
-
-
-/*
- * Transmit an skb  Called when an skbuf has to be transmitted
- *
- * The skb is first passed to WLP substack to ensure this is a valid
- * frame. If valid the device address of destination will be filled and
- * the WLP header prepended to the skb. If this step fails we fake sending
- * the frame, if we return an error the network stack will just keep trying.
- *
- * Broadcast frames inside a WSS needs to be treated special as multicast is
- * not supported. A broadcast frame is sent as unicast to each member of the
- * WSS - this is done by the WLP substack when it finds a broadcast frame.
- * So, we test if the WLP substack took over the skb and only transmit it
- * if it has not (been taken over).
- *
- * @net_dev->xmit_lock is held
- */
-netdev_tx_t i1480u_hard_start_xmit(struct sk_buff *skb,
-					 struct net_device *net_dev)
-{
-	int result;
-	struct i1480u *i1480u = netdev_priv(net_dev);
-	struct device *dev = &i1480u->usb_iface->dev;
-	struct uwb_dev_addr dst;
-
-	if ((net_dev->flags & IFF_UP) == 0)
-		goto error;
-	result = wlp_prepare_tx_frame(dev, &i1480u->wlp, skb, &dst);
-	if (result < 0) {
-		dev_err(dev, "WLP verification of TX frame failed (%d). "
-			"Dropping packet.\n", result);
-		goto error;
-	} else if (result == 1) {
-		/* trans_start time will be set when WLP actually transmits
-		 * the frame */
-		goto out;
-	}
-	result = i1480u_xmit_frame(&i1480u->wlp, skb, &dst);
-	if (result < 0) {
-		dev_err(dev, "Frame TX failed (%d).\n", result);
-		goto error;
-	}
-	return NETDEV_TX_OK;
-error:
-	dev_kfree_skb_any(skb);
-	net_dev->stats.tx_dropped++;
-out:
-	return NETDEV_TX_OK;
-}
-
-
-/*
- * Called when a pkt transmission doesn't complete in a reasonable period
- * Device reset may sleep - do it outside of interrupt context (delayed)
- */
-void i1480u_tx_timeout(struct net_device *net_dev)
-{
-	struct i1480u *i1480u = netdev_priv(net_dev);
-
-	wlp_reset_all(&i1480u->wlp);
-}
-
-
-void i1480u_tx_release(struct i1480u *i1480u)
-{
-	unsigned long flags;
-	struct i1480u_tx *wtx, *next;
-	int count = 0, empty;
-
-	spin_lock_irqsave(&i1480u->tx_list_lock, flags);
-	list_for_each_entry_safe(wtx, next, &i1480u->tx_list, list_node) {
-		count++;
-		usb_unlink_urb(wtx->urb);
-	}
-	spin_unlock_irqrestore(&i1480u->tx_list_lock, flags);
-	count = count*10; /* i1480ut 200ms per unlinked urb (intervals of 20ms) */
-	/*
-	 * We don't like this sollution too much (dirty as it is), but
-	 * it is cheaper than putting a refcount on each i1480u_tx and
-	 * i1480uting for all of them to go away...
-	 *
-	 * Called when no more packets can be added to tx_list
-	 * so can i1480ut for it to be empty.
-	 */
-	while (1) {
-		spin_lock_irqsave(&i1480u->tx_list_lock, flags);
-		empty = list_empty(&i1480u->tx_list);
-		spin_unlock_irqrestore(&i1480u->tx_list_lock, flags);
-		if (empty)
-			break;
-		count--;
-		BUG_ON(count == 0);
-		msleep(20);
-	}
-}

drivers/uwb/wlp/Makefile

···
-obj-$(CONFIG_UWB_WLP) := wlp.o
-
-wlp-objs :=	\
-	driver.o	\
-	eda.o		\
-	messages.o	\
-	sysfs.o		\
-	txrx.o		\
-	wlp-lc.o	\
-	wss-lc.o

drivers/uwb/wlp/driver.c

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * Life cycle of WLP substack
- *
- * FIXME: Docs
- */
-
-#include <linux/module.h>
-
-static int __init wlp_subsys_init(void)
-{
-	return 0;
-}
-module_init(wlp_subsys_init);
-
-static void __exit wlp_subsys_exit(void)
-{
-	return;
-}
-module_exit(wlp_subsys_exit);
-
-MODULE_AUTHOR("Reinette Chatre <[e-mail]>");
-MODULE_DESCRIPTION("WiMedia Logical Link Control Protocol (WLP)");
-MODULE_LICENSE("GPL");

drivers/uwb/wlp/eda.c

···
-/*
- * WUSB Wire Adapter: WLP interface
- * Ethernet to device address cache
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Inaky Perez-Gonzalez <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * We need to be able to map ethernet addresses to device addresses
- * and back because there is not explicit relationship between the eth
- * addresses used in the ETH frames and the device addresses (no, it
- * would not have been simpler to force as ETH address the MBOA MAC
- * address...no, not at all :).
- *
- * A device has one MBOA MAC address and one device address. It is possible
- * for a device to have more than one virtual MAC address (although a
- * virtual address can be the same as the MBOA MAC address). The device
- * address is guaranteed to be unique among the devices in the extended
- * beacon group (see ECMA 17.1.1). We thus use the device address as index
- * to this cache. We do allow searching based on virtual address as this
- * is how Ethernet frames will be addressed.
- *
- * We need to support virtual EUI-48. Although, right now the virtual
- * EUI-48 will always be the same as the MAC SAP address. The EDA cache
- * entry thus contains a MAC SAP address as well as the virtual address
- * (used to map the network stack address to a neighbor). When we move
- * to support more than one virtual MAC on a host then this organization
- * will have to change. Perhaps a neighbor has a list of WSSs, each with a
- * tag and virtual EUI-48.
- *
- * On data transmission
- * it is used to determine if the neighbor is connected and what WSS it
- * belongs to. With this we know what tag to add to the WLP frame. Storing
- * the WSS in the EDA cache may be overkill because we only support one
- * WSS. Hopefully we will support more than one WSS at some point.
- * On data reception it is used to determine the WSS based on
- * the tag and address of the transmitting neighbor.
- */
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/slab.h>
-#include <linux/wlp.h>
-#include "wlp-internal.h"
-
-
-/* FIXME: cache is not purged, only on device close */
-
-/* FIXME: does not scale, change to dynamic array */
-
-/*
- * Initialize the EDA cache
- *
- * @returns 0 if ok, < 0 errno code on error
- *
- * Call when the interface is being brought up
- *
- * NOTE: Keep it as a separate function as the implementation will
- *       change and be more complex.
- */
-void wlp_eda_init(struct wlp_eda *eda)
-{
-	INIT_LIST_HEAD(&eda->cache);
-	spin_lock_init(&eda->lock);
-}
-
-/*
- * Release the EDA cache
- *
- * @returns 0 if ok, < 0 errno code on error
- *
- * Called when the interface is brought down
- */
-void wlp_eda_release(struct wlp_eda *eda)
-{
-	unsigned long flags;
-	struct wlp_eda_node *itr, *next;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry_safe(itr, next, &eda->cache, list_node) {
-		list_del(&itr->list_node);
-		kfree(itr);
-	}
-	spin_unlock_irqrestore(&eda->lock, flags);
-}
-
-/*
- * Add an address mapping
- *
- * @returns 0 if ok, < 0 errno code on error
- *
- * An address mapping is initially created when the neighbor device is seen
- * for the first time (it is "onair"). At this time the neighbor is not
- * connected or associated with a WSS so we only populate the Ethernet and
- * Device address fields.
- *
- */
-int wlp_eda_create_node(struct wlp_eda *eda,
-			const unsigned char eth_addr[ETH_ALEN],
-			const struct uwb_dev_addr *dev_addr)
-{
-	int result = 0;
-	struct wlp_eda_node *itr;
-	unsigned long flags;
-
-	BUG_ON(dev_addr == NULL || eth_addr == NULL);
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry(itr, &eda->cache, list_node) {
-		if (!memcmp(&itr->dev_addr, dev_addr, sizeof(itr->dev_addr))) {
-			printk(KERN_ERR "EDA cache already contains entry "
-			       "for neighbor %02x:%02x\n",
-			       dev_addr->data[1], dev_addr->data[0]);
-			result = -EEXIST;
-			goto out_unlock;
-		}
-	}
-	itr = kzalloc(sizeof(*itr), GFP_ATOMIC);
-	if (itr != NULL) {
-		memcpy(itr->eth_addr, eth_addr, sizeof(itr->eth_addr));
-		itr->dev_addr = *dev_addr;
-		list_add(&itr->list_node, &eda->cache);
-	} else
-		result = -ENOMEM;
-out_unlock:
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-
-/*
- * Remove entry from EDA cache
- *
- * This is done when the device goes off air.
- */
-void wlp_eda_rm_node(struct wlp_eda *eda, const struct uwb_dev_addr *dev_addr)
-{
-	struct wlp_eda_node *itr, *next;
-	unsigned long flags;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry_safe(itr, next, &eda->cache, list_node) {
-		if (!memcmp(&itr->dev_addr, dev_addr, sizeof(itr->dev_addr))) {
-			list_del(&itr->list_node);
-			kfree(itr);
-			break;
-		}
-	}
-	spin_unlock_irqrestore(&eda->lock, flags);
-}
-
-/*
- * Update an address mapping
- *
- * @returns 0 if ok, < 0 errno code on error
- */
-int wlp_eda_update_node(struct wlp_eda *eda,
-			const struct uwb_dev_addr *dev_addr,
-			struct wlp_wss *wss,
-			const unsigned char virt_addr[ETH_ALEN],
-			const u8 tag, const enum wlp_wss_connect state)
-{
-	int result = -ENOENT;
-	struct wlp_eda_node *itr;
-	unsigned long flags;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry(itr, &eda->cache, list_node) {
-		if (!memcmp(&itr->dev_addr, dev_addr, sizeof(itr->dev_addr))) {
-			/* Found it, update it */
-			itr->wss = wss;
-			memcpy(itr->virt_addr, virt_addr,
-			       sizeof(itr->virt_addr));
-			itr->tag = tag;
-			itr->state = state;
-			result = 0;
-			goto out_unlock;
-		}
-	}
-	/* Not found */
-out_unlock:
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-
-/*
- * Update only state field of an address mapping
- *
- * @returns 0 if ok, < 0 errno code on error
- */
-int wlp_eda_update_node_state(struct wlp_eda *eda,
-			      const struct uwb_dev_addr *dev_addr,
-			      const enum wlp_wss_connect state)
-{
-	int result = -ENOENT;
-	struct wlp_eda_node *itr;
-	unsigned long flags;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry(itr, &eda->cache, list_node) {
-		if (!memcmp(&itr->dev_addr, dev_addr, sizeof(itr->dev_addr))) {
-			/* Found it, update it */
-			itr->state = state;
-			result = 0;
-			goto out_unlock;
-		}
-	}
-	/* Not found */
-out_unlock:
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-
-/*
- * Return contents of EDA cache entry
- *
- * @dev_addr: index to EDA cache
- * @eda_entry: pointer to where contents of EDA cache will be copied
- */
-int wlp_copy_eda_node(struct wlp_eda *eda, struct uwb_dev_addr *dev_addr,
-		      struct wlp_eda_node *eda_entry)
-{
-	int result = -ENOENT;
-	struct wlp_eda_node *itr;
-	unsigned long flags;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry(itr, &eda->cache, list_node) {
-		if (!memcmp(&itr->dev_addr, dev_addr, sizeof(itr->dev_addr))) {
-			*eda_entry = *itr;
-			result = 0;
-			goto out_unlock;
-		}
-	}
-	/* Not found */
-out_unlock:
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-
-/*
- * Execute function for every element in the cache
- *
- * @function: function to execute on element of cache (must be atomic)
- * @priv:     private data of function
- * @returns:  result of first function that failed, or last function
- *            executed if no function failed.
- *
- * Stop executing when function returns error for any element in cache.
- *
- * IMPORTANT: We are using a spinlock here: the function executed on each
- * element has to be atomic.
- */
-int wlp_eda_for_each(struct wlp_eda *eda, wlp_eda_for_each_f function,
-		     void *priv)
-{
-	int result = 0;
-	struct wlp *wlp = container_of(eda, struct wlp, eda);
-	struct wlp_eda_node *entry;
-	unsigned long flags;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry(entry, &eda->cache, list_node) {
-		result = (*function)(wlp, entry, priv);
-		if (result < 0)
-			break;
-	}
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-
-/*
- * Execute function for single element in the cache (return dev addr)
- *
- * @virt_addr: index into EDA cache used to determine which element to
- *             execute the function on
- * @dev_addr: device address of element in cache will be returned using
- *            @dev_addr
- * @function: function to execute on element of cache (must be atomic)
- * @priv:     private data of function
- * @returns:  result of function
- *
- * IMPORTANT: We are using a spinlock here: the function executed on the
- * element has to be atomic.
- */
-int wlp_eda_for_virtual(struct wlp_eda *eda,
-			const unsigned char virt_addr[ETH_ALEN],
-			struct uwb_dev_addr *dev_addr,
-			wlp_eda_for_each_f function,
-			void *priv)
-{
-	int result = 0;
-	struct wlp *wlp = container_of(eda, struct wlp, eda);
-	struct wlp_eda_node *itr;
-	unsigned long flags;
-	int found = 0;
-
-	spin_lock_irqsave(&eda->lock, flags);
-	list_for_each_entry(itr, &eda->cache, list_node) {
-		if (!memcmp(itr->virt_addr, virt_addr,
-			   sizeof(itr->virt_addr))) {
-			result = (*function)(wlp, itr, priv);
-			*dev_addr = itr->dev_addr;
-			found = 1;
-			break;
-		}
-	}
-	if (!found)
-		result = -ENODEV;
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-
-static const char *__wlp_wss_connect_state[] = { "WLP_WSS_UNCONNECTED",
-					  "WLP_WSS_CONNECTED",
-					  "WLP_WSS_CONNECT_FAILED",
-};
-
-static const char *wlp_wss_connect_state_str(unsigned id)
-{
-	if (id >= ARRAY_SIZE(__wlp_wss_connect_state))
-		return "unknown WSS connection state";
-	return __wlp_wss_connect_state[id];
-}
-
-/*
- * View EDA cache from user space
- *
- * A debugging feature to give user visibility into the EDA cache. Also
- * used to display members of WSS to user (called from wlp_wss_members_show())
- */
-ssize_t wlp_eda_show(struct wlp *wlp, char *buf)
-{
-	ssize_t result = 0;
-	struct wlp_eda_node *entry;
-	unsigned long flags;
-	struct wlp_eda *eda = &wlp->eda;
-	spin_lock_irqsave(&eda->lock, flags);
-	result = scnprintf(buf, PAGE_SIZE, "#eth_addr dev_addr wss_ptr "
-			   "tag state virt_addr\n");
-	list_for_each_entry(entry, &eda->cache, list_node) {
-		result += scnprintf(buf + result, PAGE_SIZE - result,
-				    "%pM %02x:%02x %p 0x%02x %s %pM\n",
-				    entry->eth_addr,
-				    entry->dev_addr.data[1],
-				    entry->dev_addr.data[0], entry->wss,
-				    entry->tag,
-				    wlp_wss_connect_state_str(entry->state),
-				    entry->virt_addr);
-		if (result >= PAGE_SIZE)
-			break;
-	}
-	spin_unlock_irqrestore(&eda->lock, flags);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_eda_show);
-
-/*
- * Add new EDA cache entry based on user input in sysfs
- *
- * Should only be used for debugging.
- *
- * The WSS is assumed to be the only WSS supported. This needs to be
- * redesigned when we support more than one WSS.
- */
-ssize_t wlp_eda_store(struct wlp *wlp, const char *buf, size_t size)
-{
-	ssize_t result;
-	struct wlp_eda *eda = &wlp->eda;
-	u8 eth_addr[6];
-	struct uwb_dev_addr dev_addr;
-	u8 tag;
-	unsigned state;
-
-	result = sscanf(buf, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx "
-			"%02hhx:%02hhx %02hhx %u\n",
-			&eth_addr[0], &eth_addr[1],
-			&eth_addr[2], &eth_addr[3],
-			&eth_addr[4], &eth_addr[5],
-			&dev_addr.data[1], &dev_addr.data[0], &tag, &state);
-	switch (result) {
-	case 6: /* no dev addr specified -- remove entry NOT IMPLEMENTED */
-		/*result = wlp_eda_rm(eda, eth_addr, &dev_addr);*/
-		result = -ENOSYS;
-		break;
-	case 10:
-		state = state >= 1 ? 1 : 0;
-		result = wlp_eda_create_node(eda, eth_addr, &dev_addr);
-		if (result < 0 && result != -EEXIST)
-			goto error;
-		/* Set virtual addr to be same as MAC */
-		result = wlp_eda_update_node(eda, &dev_addr, &wlp->wss,
-					     eth_addr, tag, state);
-		if (result < 0)
-			goto error;
-		break;
-	default: /* bad format */
-		result = -EINVAL;
-	}
-error:
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_eda_store);

drivers/uwb/wlp/messages.c

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- * Message construction and parsing
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- */
-
-#include <linux/wlp.h>
-#include <linux/slab.h>
-
-#include "wlp-internal.h"
-
-static
-const char *__wlp_assoc_frame[] = {
-	[WLP_ASSOC_D1] = "WLP_ASSOC_D1",
-	[WLP_ASSOC_D2] = "WLP_ASSOC_D2",
-	[WLP_ASSOC_M1] = "WLP_ASSOC_M1",
-	[WLP_ASSOC_M2] = "WLP_ASSOC_M2",
-	[WLP_ASSOC_M3] = "WLP_ASSOC_M3",
-	[WLP_ASSOC_M4] = "WLP_ASSOC_M4",
-	[WLP_ASSOC_M5] = "WLP_ASSOC_M5",
-	[WLP_ASSOC_M6] = "WLP_ASSOC_M6",
-	[WLP_ASSOC_M7] = "WLP_ASSOC_M7",
-	[WLP_ASSOC_M8] = "WLP_ASSOC_M8",
-	[WLP_ASSOC_F0] = "WLP_ASSOC_F0",
-	[WLP_ASSOC_E1] = "WLP_ASSOC_E1",
-	[WLP_ASSOC_E2] = "WLP_ASSOC_E2",
-	[WLP_ASSOC_C1] = "WLP_ASSOC_C1",
-	[WLP_ASSOC_C2] = "WLP_ASSOC_C2",
-	[WLP_ASSOC_C3] = "WLP_ASSOC_C3",
-	[WLP_ASSOC_C4] = "WLP_ASSOC_C4",
-};
-
-static const char *wlp_assoc_frame_str(unsigned id)
-{
-	if (id >= ARRAY_SIZE(__wlp_assoc_frame))
-		return "unknown association frame";
-	return __wlp_assoc_frame[id];
-}
-
-static const char *__wlp_assc_error[] = {
-	"none",
-	"Authenticator Failure",
-	"Rogue activity suspected",
-	"Device busy",
-	"Setup Locked",
-	"Registrar not ready",
-	"Invalid WSS selection",
-	"Message timeout",
-	"Enrollment session timeout",
-	"Device password invalid",
-	"Unsupported version",
-	"Internal error",
-	"Undefined error",
-	"Numeric comparison failure",
-	"Waiting for user input",
-};
-
-static const char *wlp_assc_error_str(unsigned id)
-{
-	if (id >= ARRAY_SIZE(__wlp_assc_error))
-		return "unknown WLP association error";
-	return __wlp_assc_error[id];
-}
-
-static inline void wlp_set_attr_hdr(struct wlp_attr_hdr *hdr, unsigned type,
-				    size_t len)
-{
-	hdr->type = cpu_to_le16(type);
-	hdr->length = cpu_to_le16(len);
-}
-
-/*
- * Populate fields of a constant sized attribute
- *
- * @returns: total size of attribute including size of new value
- *
- * We have two instances of this function (wlp_pset and wlp_set): one takes
- * the value as a parameter, the other takes a pointer to the value as
- * parameter. They thus only differ in how the value is assigned to the
- * attribute.
- *
- * We use sizeof(*attr) - sizeof(struct wlp_attr_hdr) instead of
- * sizeof(type) to be able to use this same code for the structures that
- * contain 8bit enum values and be able to deal with pointer types.
- */
-#define wlp_set(type, type_code, name)					\
-static size_t wlp_set_##name(struct wlp_attr_##name *attr, type value)	\
-{									\
-	wlp_set_attr_hdr(&attr->hdr, type_code,				\
-			 sizeof(*attr) - sizeof(struct wlp_attr_hdr));	\
-	attr->name = value;						\
-	return sizeof(*attr);						\
-}
-
-#define wlp_pset(type, type_code, name)					\
-static size_t wlp_set_##name(struct wlp_attr_##name *attr, type value)	\
-{									\
-	wlp_set_attr_hdr(&attr->hdr, type_code,				\
-			 sizeof(*attr) - sizeof(struct wlp_attr_hdr));	\
-	attr->name = *value;						\
-	return sizeof(*attr);						\
-}
-
-/**
- * Populate fields of a variable attribute
- *
- * @returns: total size of attribute including size of new value
- *
- * Provided with a pointer to the memory area reserved for the
- * attribute structure, the field is populated with the value. The
- * reserved memory has to contain enough space for the value.
- */
-#define wlp_vset(type, type_code, name)					\
-static size_t wlp_set_##name(struct wlp_attr_##name *attr, type value,	\
-				size_t len)				\
-{									\
-	wlp_set_attr_hdr(&attr->hdr, type_code, len);			\
-	memcpy(attr->name, value, len);					\
-	return sizeof(*attr) + len;					\
-}
-
-wlp_vset(char *, WLP_ATTR_DEV_NAME, dev_name)
-wlp_vset(char *, WLP_ATTR_MANUF, manufacturer)
-wlp_set(enum wlp_assoc_type, WLP_ATTR_MSG_TYPE, msg_type)
-wlp_vset(char *, WLP_ATTR_MODEL_NAME, model_name)
-wlp_vset(char *, WLP_ATTR_MODEL_NR, model_nr)
-wlp_vset(char *, WLP_ATTR_SERIAL, serial)
-wlp_vset(char *, WLP_ATTR_WSS_NAME, wss_name)
-wlp_pset(struct wlp_uuid *, WLP_ATTR_UUID_E, uuid_e)
-wlp_pset(struct wlp_uuid *, WLP_ATTR_UUID_R, uuid_r)
-wlp_pset(struct wlp_uuid *, WLP_ATTR_WSSID, wssid)
-wlp_pset(struct wlp_dev_type *, WLP_ATTR_PRI_DEV_TYPE, prim_dev_type)
-/*wlp_pset(struct wlp_dev_type *, WLP_ATTR_SEC_DEV_TYPE, sec_dev_type)*/
-wlp_set(u8, WLP_ATTR_WLP_VER, version)
-wlp_set(enum wlp_assc_error, WLP_ATTR_WLP_ASSC_ERR, wlp_assc_err)
-wlp_set(enum wlp_wss_sel_mthd, WLP_ATTR_WSS_SEL_MTHD, wss_sel_mthd)
-wlp_set(u8, WLP_ATTR_ACC_ENRL, accept_enrl)
-wlp_set(u8, WLP_ATTR_WSS_SEC_STAT, wss_sec_status)
-wlp_pset(struct uwb_mac_addr *, WLP_ATTR_WSS_BCAST, wss_bcast)
-wlp_pset(struct wlp_nonce *, WLP_ATTR_ENRL_NONCE, enonce)
-wlp_pset(struct wlp_nonce *, WLP_ATTR_REG_NONCE, rnonce)
-wlp_set(u8, WLP_ATTR_WSS_TAG, wss_tag)
-wlp_pset(struct uwb_mac_addr *, WLP_ATTR_WSS_VIRT, wss_virt)
-
-/**
- * Fill in the WSS information attributes
- *
- * We currently only support one WSS, and this is assumed in this function
- * that can populate only one WSS information attribute.
- */
-static size_t wlp_set_wss_info(struct wlp_attr_wss_info *attr,
-			       struct wlp_wss *wss)
-{
-	size_t datalen;
-	void *ptr = attr->wss_info;
-	size_t used = sizeof(*attr);
-
-	datalen = sizeof(struct wlp_wss_info) + strlen(wss->name);
-	wlp_set_attr_hdr(&attr->hdr, WLP_ATTR_WSS_INFO, datalen);
-	used = wlp_set_wssid(ptr, &wss->wssid);
-	used += wlp_set_wss_name(ptr + used, wss->name, strlen(wss->name));
-	used += wlp_set_accept_enrl(ptr + used, wss->accept_enroll);
-	used += wlp_set_wss_sec_status(ptr + used, wss->secure_status);
-	used += wlp_set_wss_bcast(ptr + used, &wss->bcast);
-	return sizeof(*attr) + used;
-}
-
-/**
- * Verify attribute header
- *
- * @hdr:     Pointer to attribute header that will be verified.
- * @type:    Expected attribute type.
- * @len:     Expected length of attribute value (excluding header).
- *
- * Most attribute values have a known length even when they do have a
- * length field. This knowledge can be used via this function to verify
- * that the length field matches the expected value.
- */
-static int wlp_check_attr_hdr(struct wlp *wlp, struct wlp_attr_hdr *hdr,
-		       enum wlp_attr_type type, unsigned len)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-
-	if (le16_to_cpu(hdr->type) != type) {
-		dev_err(dev, "WLP: unexpected header type. Expected "
-			"%u, got %u.\n", type, le16_to_cpu(hdr->type));
-		return -EINVAL;
-	}
-	if (le16_to_cpu(hdr->length) != len) {
-		dev_err(dev, "WLP: unexpected length in header. Expected "
-			"%u, got %u.\n", len, le16_to_cpu(hdr->length));
-		return -EINVAL;
-	}
-	return 0;
-}
-
-/**
- * Check if header of WSS information attribute valid
- *
- * @returns: length of WSS attributes (value of length attribute field) if
- *             valid WSS information attribute found
- *           -ENODATA if no WSS information attribute found
- *           -EIO other error occured
- *
- * The WSS information attribute is optional. The function will be provided
- * with a pointer to data that could _potentially_ be a WSS information
- * attribute. If a valid WSS information attribute is found it will return
- * 0, if no WSS information attribute is found it will return -ENODATA, and
- * another error will be returned if it is a WSS information attribute, but
- * some parsing failure occured.
- */
-static int wlp_check_wss_info_attr_hdr(struct wlp *wlp,
-				       struct wlp_attr_hdr *hdr, size_t buflen)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	size_t len;
-	int result = 0;
-
-	if (buflen < sizeof(*hdr)) {
-		dev_err(dev, "WLP: Not enough space in buffer to parse"
-			" WSS information attribute header.\n");
-		result = -EIO;
-		goto out;
-	}
-	if (le16_to_cpu(hdr->type) != WLP_ATTR_WSS_INFO) {
-		/* WSS information is optional */
-		result = -ENODATA;
-		goto out;
-	}
-	len = le16_to_cpu(hdr->length);
-	if (buflen < sizeof(*hdr) + len) {
-		dev_err(dev, "WLP: Not enough space in buffer to parse "
-			"variable data. Got %d, expected %d.\n",
-			(int)buflen, (int)(sizeof(*hdr) + len));
-		result = -EIO;
-		goto out;
-	}
-	result = len;
-out:
-	return result;
-}
-
-
-static ssize_t wlp_get_attribute(struct wlp *wlp, u16 type_code,
-	struct wlp_attr_hdr *attr_hdr, void *value, ssize_t value_len,
-	ssize_t buflen)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	ssize_t attr_len = sizeof(*attr_hdr) + value_len;
-	if (buflen < 0)
-		return -EINVAL;
-	if (buflen < attr_len) {
-		dev_err(dev, "WLP: Not enough space in buffer to parse"
-			" attribute field. Need %d, received %zu\n",
-			(int)attr_len, buflen);
-		return -EIO;
-	}
-	if (wlp_check_attr_hdr(wlp, attr_hdr, type_code, value_len) < 0) {
-		dev_err(dev, "WLP: Header verification failed. \n");
-		return -EINVAL;
-	}
-	memcpy(value, (void *)attr_hdr + sizeof(*attr_hdr), value_len);
-	return attr_len;
-}
-
-static ssize_t wlp_vget_attribute(struct wlp *wlp, u16 type_code,
-	struct wlp_attr_hdr *attr_hdr, void *value, ssize_t max_value_len,
-	ssize_t buflen)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	size_t len;
-	if (buflen < 0)
-		return -EINVAL;
-	if (buflen < sizeof(*attr_hdr)) {
-		dev_err(dev, "WLP: Not enough space in buffer to parse"
-			" header.\n");
-		return -EIO;
-	}
-	if (le16_to_cpu(attr_hdr->type) != type_code) {
-		dev_err(dev, "WLP: Unexpected attribute type. Got %u, "
-			"expected %u.\n", le16_to_cpu(attr_hdr->type),
-			type_code);
-		return -EINVAL;
-	}
-	len = le16_to_cpu(attr_hdr->length);
-	if (len > max_value_len) {
-		dev_err(dev, "WLP: Attribute larger than maximum "
-			"allowed. Received %zu, max is %d.\n", len,
-			(int)max_value_len);
-		return -EFBIG;
-	}
-	if (buflen < sizeof(*attr_hdr) + len) {
-		dev_err(dev, "WLP: Not enough space in buffer to parse "
-			"variable data.\n");
-		return -EIO;
-	}
-	memcpy(value, (void *)attr_hdr + sizeof(*attr_hdr), len);
-	return sizeof(*attr_hdr) + len;
-}
-
-/**
- * Get value of attribute from fixed size attribute field.
- *
- * @attr:    Pointer to attribute field.
- * @value:   Pointer to variable in which attribute value will be placed.
- * @buflen:  Size of buffer in which attribute field (including header)
- *           can be found.
- * @returns: Amount of given buffer consumed by parsing for this attribute.
- *
- * The size and type of the value is known by the type of the attribute.
- */
-#define wlp_get(type, type_code, name)					\
-ssize_t wlp_get_##name(struct wlp *wlp, struct wlp_attr_##name *attr,	\
-		      type *value, ssize_t buflen)			\
-{									\
-	return wlp_get_attribute(wlp, (type_code), &attr->hdr,		\
-				 value, sizeof(*value), buflen);	\
-}
-
-#define wlp_get_sparse(type, type_code, name) \
-	static wlp_get(type, type_code, name)
-
-/**
- * Get value of attribute from variable sized attribute field.
- *
- * @max:     The maximum size of this attribute. This value is dictated by
- *           the maximum value from the WLP specification.
- *
- * @attr:    Pointer to attribute field.
- * @value:   Pointer to variable that will contain the value. The memory
- *           must already have been allocated for this value.
- * @buflen:  Size of buffer in which attribute field (including header)
- *           can be found.
- * @returns: Amount of given bufferconsumed by parsing for this attribute.
- */
-#define wlp_vget(type_val, type_code, name, max)			\
-static ssize_t wlp_get_##name(struct wlp *wlp,				\
-			      struct wlp_attr_##name *attr,		\
-			      type_val *value, ssize_t buflen)		\
-{									\
-	return wlp_vget_attribute(wlp, (type_code), &attr->hdr, 	\
-			      value, (max), buflen);			\
-}
-
-wlp_get(u8, WLP_ATTR_WLP_VER, version)
-wlp_get_sparse(enum wlp_wss_sel_mthd, WLP_ATTR_WSS_SEL_MTHD, wss_sel_mthd)
-wlp_get_sparse(struct wlp_dev_type, WLP_ATTR_PRI_DEV_TYPE, prim_dev_type)
-wlp_get_sparse(enum wlp_assc_error, WLP_ATTR_WLP_ASSC_ERR, wlp_assc_err)
-wlp_get_sparse(struct wlp_uuid, WLP_ATTR_UUID_E, uuid_e)
-wlp_get_sparse(struct wlp_uuid, WLP_ATTR_UUID_R, uuid_r)
-wlp_get(struct wlp_uuid, WLP_ATTR_WSSID, wssid)
-wlp_get_sparse(u8, WLP_ATTR_ACC_ENRL, accept_enrl)
-wlp_get_sparse(u8, WLP_ATTR_WSS_SEC_STAT, wss_sec_status)
-wlp_get_sparse(struct uwb_mac_addr, WLP_ATTR_WSS_BCAST, wss_bcast)
-wlp_get_sparse(u8, WLP_ATTR_WSS_TAG, wss_tag)
-wlp_get_sparse(struct uwb_mac_addr, WLP_ATTR_WSS_VIRT, wss_virt)
-wlp_get_sparse(struct wlp_nonce, WLP_ATTR_ENRL_NONCE, enonce)
-wlp_get_sparse(struct wlp_nonce, WLP_ATTR_REG_NONCE, rnonce)
-
-/* The buffers for the device info attributes can be found in the
- * wlp_device_info struct. These buffers contain one byte more than the
- * max allowed by the spec - this is done to be able to add the
- * terminating \0 for user display. This terminating byte is not required
- * in the actual attribute field (because it has a length field) so the
- * maximum allowed for this value is one less than its size in the
- * structure.
- */
-wlp_vget(char, WLP_ATTR_WSS_NAME, wss_name,
-	 FIELD_SIZEOF(struct wlp_wss, name) - 1)
-wlp_vget(char, WLP_ATTR_DEV_NAME, dev_name,
-	 FIELD_SIZEOF(struct wlp_device_info, name) - 1)
-wlp_vget(char, WLP_ATTR_MANUF, manufacturer,
-	 FIELD_SIZEOF(struct wlp_device_info, manufacturer) - 1)
-wlp_vget(char, WLP_ATTR_MODEL_NAME, model_name,
-	 FIELD_SIZEOF(struct wlp_device_info, model_name) - 1)
-wlp_vget(char, WLP_ATTR_MODEL_NR, model_nr,
-	 FIELD_SIZEOF(struct wlp_device_info, model_nr) - 1)
-wlp_vget(char, WLP_ATTR_SERIAL, serial,
-	 FIELD_SIZEOF(struct wlp_device_info, serial) - 1)
-
-/**
- * Retrieve WSS Name, Accept enroll, Secure status, Broadcast from WSS info
- *
- * @attr: pointer to WSS name attribute in WSS information attribute field
- * @info: structure that will be populated with data from WSS information
- *        field (WSS name, Accept enroll, secure status, broadcast address)
- * @buflen: size of buffer
- *
- * Although the WSSID attribute forms part of the WSS info attribute it is
- * retrieved separately and stored in a different location.
- */
-static ssize_t wlp_get_wss_info_attrs(struct wlp *wlp,
-				      struct wlp_attr_hdr *attr,
-				      struct wlp_wss_tmp_info *info,
-				      ssize_t buflen)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	void *ptr = attr;
-	size_t used = 0;
-	ssize_t result = -EINVAL;
-
-	result = wlp_get_wss_name(wlp, ptr, info->name, buflen);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS name from "
-			"WSS info in D2 message.\n");
-		goto error_parse;
-	}
-	used += result;
-
-	result = wlp_get_accept_enrl(wlp, ptr + used, &info->accept_enroll,
-				     buflen - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain accepting "
-			"enrollment from WSS info in D2 message.\n");
-		goto error_parse;
-	}
-	if (info->accept_enroll != 0 && info->accept_enroll != 1) {
-		dev_err(dev, "WLP: invalid value for accepting "
-			"enrollment in D2 message.\n");
-		result = -EINVAL;
-		goto error_parse;
-	}
-	used += result;
-
-	result = wlp_get_wss_sec_status(wlp, ptr + used, &info->sec_status,
-					buflen - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain secure "
-			"status from WSS info in D2 message.\n");
-		goto error_parse;
-	}
-	if (info->sec_status != 0 && info->sec_status != 1) {
-		dev_err(dev, "WLP: invalid value for secure "
-			"status in D2 message.\n");
-		result = -EINVAL;
-		goto error_parse;
-	}
-	used += result;
-
-	result = wlp_get_wss_bcast(wlp, ptr + used, &info->bcast,
-				   buflen - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain broadcast "
-			"address from WSS info in D2 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = used;
-error_parse:
-	return result;
-}
-
-/**
- * Create a new WSSID entry for the neighbor, allocate temporary storage
- *
- * Each neighbor can have many WSS active. We maintain a list of WSSIDs
- * advertised by neighbor. During discovery we also cache information about
- * these WSS in temporary storage.
- *
- * The temporary storage will be removed after it has been used (eg.
- * displayed to user), the wssid element will be removed from the list when
- * the neighbor is rediscovered or when it disappears.
- */
-static struct wlp_wssid_e *wlp_create_wssid_e(struct wlp *wlp,
-					      struct wlp_neighbor_e *neighbor)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_wssid_e *wssid_e;
-
-	wssid_e = kzalloc(sizeof(*wssid_e), GFP_KERNEL);
-	if (wssid_e == NULL) {
-		dev_err(dev, "WLP: unable to allocate memory "
-			"for WSS information.\n");
-		goto error_alloc;
-	}
-	wssid_e->info = kzalloc(sizeof(struct wlp_wss_tmp_info), GFP_KERNEL);
-	if (wssid_e->info == NULL) {
-		dev_err(dev, "WLP: unable to allocate memory "
-			"for temporary WSS information.\n");
-		kfree(wssid_e);
-		wssid_e = NULL;
-		goto error_alloc;
-	}
-	list_add(&wssid_e->node, &neighbor->wssid);
-error_alloc:
-	return wssid_e;
-}
-
-/**
- * Parse WSS information attribute
- *
- * @attr: pointer to WSS information attribute header
- * @buflen: size of buffer in which WSS information attribute appears
- * @wssid: will place wssid from WSS info attribute in this location
- * @wss_info: will place other information from WSS information attribute
- * in this location
- *
- * memory for @wssid and @wss_info must be allocated when calling this
- */
-static ssize_t wlp_get_wss_info(struct wlp *wlp, struct wlp_attr_wss_info *attr,
-				size_t buflen, struct wlp_uuid *wssid,
-				struct wlp_wss_tmp_info *wss_info)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	ssize_t result;
-	size_t len;
-	size_t used = 0;
-	void *ptr;
-
-	result = wlp_check_wss_info_attr_hdr(wlp, (struct wlp_attr_hdr *)attr,
-					     buflen);
-	if (result < 0)
-		goto out;
-	len = result;
-	used = sizeof(*attr);
-	ptr = attr;
-
-	result = wlp_get_wssid(wlp, ptr + used, wssid, buflen - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSSID from WSS info.\n");
-		goto out;
-	}
-	used += result;
-	result = wlp_get_wss_info_attrs(wlp, ptr + used, wss_info,
-					buflen - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS information "
-			"from WSS information attributes. \n");
-		goto out;
-	}
-	used += result;
-	if (len + sizeof(*attr) != used) {
-		dev_err(dev, "WLP: Amount of data parsed does not "
-			"match length field. Parsed %zu, length "
-			"field %zu. \n", used, len);
-		result = -EINVAL;
-		goto out;
-	}
-	result = used;
-out:
-	return result;
-}
-
-/**
- * Retrieve WSS info from association frame
- *
- * @attr:     pointer to WSS information attribute
- * @neighbor: ptr to neighbor being discovered, NULL if enrollment in
- *            progress
- * @wss:      ptr to WSS being enrolled in, NULL if discovery in progress
- * @buflen:   size of buffer in which WSS information appears
- *
- * The WSS information attribute appears in the D2 association message.
- * This message is used in two ways: to discover all neighbors or to enroll
- * into a WSS activated by a neighbor. During discovery we only want to
- * store the WSS info in a cache, to be deleted right after it has been
- * used (eg. displayed to the user). During enrollment we store the WSS
- * information for the lifetime of enrollment.
- *
- * During discovery we are interested in all WSS information, during
- * enrollment we are only interested in the WSS being enrolled in. Even so,
- * when in enrollment we keep parsing the message after finding the WSS of
- * interest, this simplifies the calling routine in that it can be sure
- * that all WSS information attributes have been parsed out of the message.
- *
- * Association frame is process with nbmutex held. The list access is safe.
- */
-static ssize_t wlp_get_all_wss_info(struct wlp *wlp,
-				    struct wlp_attr_wss_info *attr,
-				    struct wlp_neighbor_e *neighbor,
-				    struct wlp_wss *wss, ssize_t buflen)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	size_t used = 0;
-	ssize_t result = -EINVAL;
-	struct wlp_attr_wss_info *cur;
-	struct wlp_uuid wssid;
-	struct wlp_wss_tmp_info wss_info;
-	unsigned enroll; /* 0 - discovery to cache, 1 - enrollment */
-	struct wlp_wssid_e *wssid_e;
-	char buf[WLP_WSS_UUID_STRSIZE];
-
-	if (buflen < 0)
-		goto out;
-
-	if (neighbor != NULL && wss == NULL)
-		enroll = 0; /* discovery */
-	else if (wss != NULL && neighbor == NULL)
-		enroll = 1; /* enrollment */
-	else
-		goto out;
-
-	cur = attr;
-	while (buflen - used > 0) {
-		memset(&wss_info, 0, sizeof(wss_info));
-		cur = (void *)cur + used;
-		result = wlp_get_wss_info(wlp, cur, buflen - used, &wssid,
-					  &wss_info);
-		if (result == -ENODATA) {
-			result = used;
-			goto out;
-		} else if (result < 0) {
-			dev_err(dev, "WLP: Unable to parse WSS information "
-				"from WSS information attribute. \n");
-			result = -EINVAL;
-			goto error_parse;
-		}
-		if (enroll && !memcmp(&wssid, &wss->wssid, sizeof(wssid))) {
-			if (wss_info.accept_enroll != 1) {
-				dev_err(dev, "WLP: Requested WSS does "
-					"not accept enrollment.\n");
-				result = -EINVAL;
-				goto out;
-			}
-			memcpy(wss->name, wss_info.name, sizeof(wss->name));
-			wss->bcast = wss_info.bcast;
-			wss->secure_status = wss_info.sec_status;
-			wss->accept_enroll = wss_info.accept_enroll;
-			wss->state = WLP_WSS_STATE_PART_ENROLLED;
-			wlp_wss_uuid_print(buf, sizeof(buf), &wssid);
-			dev_dbg(dev, "WLP: Found WSS %s. Enrolling.\n", buf);
-		} else {
-			wssid_e = wlp_create_wssid_e(wlp, neighbor);
-			if (wssid_e == NULL) {
-				dev_err(dev, "WLP: Cannot create new WSSID "
-					"entry for neighbor %02x:%02x.\n",
-					neighbor->uwb_dev->dev_addr.data[1],
-					neighbor->uwb_dev->dev_addr.data[0]);
-				result = -ENOMEM;
-				goto out;
-			}
-			wssid_e->wssid = wssid;
-			*wssid_e->info = wss_info;
-		}
-		used += result;
-	}
-	result = used;
-error_parse:
-	if (result < 0 && !enroll) /* this was a discovery */
-		wlp_remove_neighbor_tmp_info(neighbor);
-out:
-	return result;
-
-}
-
-/**
- * Parse WSS information attributes into cache for discovery
- *
- * @attr: the first WSS information attribute in message
- * @neighbor: the neighbor whose cache will be populated
- * @buflen: size of the input buffer
- */
-static ssize_t wlp_get_wss_info_to_cache(struct wlp *wlp,
-					 struct wlp_attr_wss_info *attr,
-					 struct wlp_neighbor_e *neighbor,
-					 ssize_t buflen)
-{
-	return wlp_get_all_wss_info(wlp, attr, neighbor, NULL, buflen);
-}
-
-/**
- * Parse WSS information attributes into WSS struct for enrollment
- *
- * @attr: the first WSS information attribute in message
- * @wss: the WSS that will be enrolled
- * @buflen: size of the input buffer
- */
-static ssize_t wlp_get_wss_info_to_enroll(struct wlp *wlp,
-					  struct wlp_attr_wss_info *attr,
-					  struct wlp_wss *wss, ssize_t buflen)
-{
-	return wlp_get_all_wss_info(wlp, attr, NULL, wss, buflen);
-}
-
-/**
- * Construct a D1 association frame
- *
- * We use the radio control functions to determine the values of the device
- * properties. These are of variable length and the total space needed is
- * tallied first before we start constructing the message. The radio
- * control functions return strings that are terminated with \0. This
- * character should not be included in the message (there is a length field
- * accompanying it in the attribute).
- */
-static int wlp_build_assoc_d1(struct wlp *wlp, struct wlp_wss *wss,
-			      struct sk_buff **skb)
-{
-
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-	struct wlp_device_info *info;
-	size_t used = 0;
-	struct wlp_frame_assoc *_d1;
-	struct sk_buff *_skb;
-	void *d1_itr;
-
-	if (wlp->dev_info == NULL) {
-		result = __wlp_setup_device_info(wlp);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to setup device "
-				"information for D1 message.\n");
-			goto error;
-		}
-	}
-	info = wlp->dev_info;
-	_skb = dev_alloc_skb(sizeof(*_d1)
-		      + sizeof(struct wlp_attr_uuid_e)
-		      + sizeof(struct wlp_attr_wss_sel_mthd)
-		      + sizeof(struct wlp_attr_dev_name)
-		      + strlen(info->name)
-		      + sizeof(struct wlp_attr_manufacturer)
-		      + strlen(info->manufacturer)
-		      + sizeof(struct wlp_attr_model_name)
-		      + strlen(info->model_name)
-		      + sizeof(struct wlp_attr_model_nr)
-		      + strlen(info->model_nr)
-		      + sizeof(struct wlp_attr_serial)
-		      + strlen(info->serial)
-		      + sizeof(struct wlp_attr_prim_dev_type)
-		      + sizeof(struct wlp_attr_wlp_assc_err));
-	if (_skb == NULL) {
-		dev_err(dev, "WLP: Cannot allocate memory for association "
-			"message.\n");
-		result = -ENOMEM;
-		goto error;
-	}
-	_d1 = (void *) _skb->data;
-	_d1->hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
-	_d1->hdr.type = WLP_FRAME_ASSOCIATION;
-	_d1->type = WLP_ASSOC_D1;
-
-	wlp_set_version(&_d1->version, WLP_VERSION);
-	wlp_set_msg_type(&_d1->msg_type, WLP_ASSOC_D1);
-	d1_itr = _d1->attr;
-	used = wlp_set_uuid_e(d1_itr, &wlp->uuid);
-	used += wlp_set_wss_sel_mthd(d1_itr + used, WLP_WSS_REG_SELECT);
-	used += wlp_set_dev_name(d1_itr + used, info->name,
-				 strlen(info->name));
-	used += wlp_set_manufacturer(d1_itr + used, info->manufacturer,
-				     strlen(info->manufacturer));
-	used += wlp_set_model_name(d1_itr + used, info->model_name,
-				   strlen(info->model_name));
-	used += wlp_set_model_nr(d1_itr + used, info->model_nr,
-				 strlen(info->model_nr));
-	used += wlp_set_serial(d1_itr + used, info->serial,
-			       strlen(info->serial));
-	used += wlp_set_prim_dev_type(d1_itr + used, &info->prim_dev_type);
-	used += wlp_set_wlp_assc_err(d1_itr + used, WLP_ASSOC_ERROR_NONE);
-	skb_put(_skb, sizeof(*_d1) + used);
-	*skb = _skb;
-error:
-	return result;
-}
-
-/**
- * Construct a D2 association frame
- *
- * We use the radio control functions to determine the values of the device
- * properties. These are of variable length and the total space needed is
- * tallied first before we start constructing the message. The radio
- * control functions return strings that are terminated with \0. This
- * character should not be included in the message (there is a length field
- * accompanying it in the attribute).
- */
-static
-int wlp_build_assoc_d2(struct wlp *wlp, struct wlp_wss *wss,
-		       struct sk_buff **skb, struct wlp_uuid *uuid_e)
-{
-
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-	struct wlp_device_info *info;
-	size_t used = 0;
-	struct wlp_frame_assoc *_d2;
-	struct sk_buff *_skb;
-	void *d2_itr;
-	size_t mem_needed;
-
-	if (wlp->dev_info == NULL) {
-		result = __wlp_setup_device_info(wlp);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to setup device "
-				"information for D2 message.\n");
-			goto error;
-		}
-	}
-	info = wlp->dev_info;
-	mem_needed = sizeof(*_d2)
-		      + sizeof(struct wlp_attr_uuid_e)
-		      + sizeof(struct wlp_attr_uuid_r)
-		      + sizeof(struct wlp_attr_dev_name)
-		      + strlen(info->name)
-		      + sizeof(struct wlp_attr_manufacturer)
-		      + strlen(info->manufacturer)
-		      + sizeof(struct wlp_attr_model_name)
-		      + strlen(info->model_name)
-		      + sizeof(struct wlp_attr_model_nr)
-		      + strlen(info->model_nr)
-		      + sizeof(struct wlp_attr_serial)
-		      + strlen(info->serial)
-		      + sizeof(struct wlp_attr_prim_dev_type)
-		      + sizeof(struct wlp_attr_wlp_assc_err);
-	if (wlp->wss.state >= WLP_WSS_STATE_ACTIVE)
-		mem_needed += sizeof(struct wlp_attr_wss_info)
-			      + sizeof(struct wlp_wss_info)
-			      + strlen(wlp->wss.name);
-	_skb = dev_alloc_skb(mem_needed);
-	if (_skb == NULL) {
-		dev_err(dev, "WLP: Cannot allocate memory for association "
-			"message.\n");
-		result = -ENOMEM;
-		goto error;
-	}
-	_d2 = (void *) _skb->data;
-	_d2->hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
-	_d2->hdr.type = WLP_FRAME_ASSOCIATION;
-	_d2->type = WLP_ASSOC_D2;
-
-	wlp_set_version(&_d2->version, WLP_VERSION);
-	wlp_set_msg_type(&_d2->msg_type, WLP_ASSOC_D2);
-	d2_itr = _d2->attr;
-	used = wlp_set_uuid_e(d2_itr, uuid_e);
-	used += wlp_set_uuid_r(d2_itr + used, &wlp->uuid);
-	if (wlp->wss.state >= WLP_WSS_STATE_ACTIVE)
-		used += wlp_set_wss_info(d2_itr + used, &wlp->wss);
-	used += wlp_set_dev_name(d2_itr + used, info->name,
-				 strlen(info->name));
-	used += wlp_set_manufacturer(d2_itr + used, info->manufacturer,
-				     strlen(info->manufacturer));
-	used += wlp_set_model_name(d2_itr + used, info->model_name,
-				   strlen(info->model_name));
-	used += wlp_set_model_nr(d2_itr + used, info->model_nr,
-				 strlen(info->model_nr));
-	used += wlp_set_serial(d2_itr + used, info->serial,
-			       strlen(info->serial));
-	used += wlp_set_prim_dev_type(d2_itr + used, &info->prim_dev_type);
-	used += wlp_set_wlp_assc_err(d2_itr + used, WLP_ASSOC_ERROR_NONE);
-	skb_put(_skb, sizeof(*_d2) + used);
-	*skb = _skb;
-error:
-	return result;
-}
-
-/**
- * Allocate memory for and populate fields of F0 association frame
- *
- * Currently (while focusing on unsecure enrollment) we ignore the
- * nonce's that could be placed in the message. Only the error field is
- * populated by the value provided by the caller.
- */
-static
-int wlp_build_assoc_f0(struct wlp *wlp, struct sk_buff **skb,
-		       enum wlp_assc_error error)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = -ENOMEM;
-	struct {
-		struct wlp_frame_assoc f0_hdr;
-		struct wlp_attr_enonce enonce;
-		struct wlp_attr_rnonce rnonce;
-		struct wlp_attr_wlp_assc_err assc_err;
-	} *f0;
-	struct sk_buff *_skb;
-	struct wlp_nonce tmp;
-
-	_skb = dev_alloc_skb(sizeof(*f0));
-	if (_skb == NULL) {
-		dev_err(dev, "WLP: Unable to allocate memory for F0 "
-			"association frame. \n");
-		goto error_alloc;
-	}
-	f0 = (void *) _skb->data;
-	f0->f0_hdr.hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
-	f0->f0_hdr.hdr.type = WLP_FRAME_ASSOCIATION;
-	f0->f0_hdr.type = WLP_ASSOC_F0;
-	wlp_set_version(&f0->f0_hdr.version, WLP_VERSION);
-	wlp_set_msg_type(&f0->f0_hdr.msg_type, WLP_ASSOC_F0);
-	memset(&tmp, 0, sizeof(tmp));
-	wlp_set_enonce(&f0->enonce, &tmp);
-	wlp_set_rnonce(&f0->rnonce, &tmp);
-	wlp_set_wlp_assc_err(&f0->assc_err, error);
-	skb_put(_skb, sizeof(*f0));
-	*skb = _skb;
-	result = 0;
-error_alloc:
-	return result;
-}
-
-/**
- * Parse F0 frame
- *
- * We just retrieve the values and print it as an error to the user.
- * Calling function already knows an error occured (F0 indicates error), so
- * we just parse the content as debug for higher layers.
- */
-int wlp_parse_f0(struct wlp *wlp, struct sk_buff *skb)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *f0 = (void *) skb->data;
-	void *ptr = skb->data;
-	size_t len = skb->len;
-	size_t used;
-	ssize_t result;
-	struct wlp_nonce enonce, rnonce;
-	enum wlp_assc_error assc_err;
-	char enonce_buf[WLP_WSS_NONCE_STRSIZE];
-	char rnonce_buf[WLP_WSS_NONCE_STRSIZE];
-
-	used = sizeof(*f0);
-	result = wlp_get_enonce(wlp, ptr + used, &enonce, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Enrollee nonce "
-			"attribute from F0 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_rnonce(wlp, ptr + used, &rnonce, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Registrar nonce "
-			"attribute from F0 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wlp_assc_err(wlp, ptr + used, &assc_err, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WLP Association error "
-			"attribute from F0 message.\n");
-		goto error_parse;
-	}
-	wlp_wss_nonce_print(enonce_buf, sizeof(enonce_buf), &enonce);
-	wlp_wss_nonce_print(rnonce_buf, sizeof(rnonce_buf), &rnonce);
-	dev_err(dev, "WLP: Received F0 error frame from neighbor. Enrollee "
-		"nonce: %s, Registrar nonce: %s, WLP Association error: %s.\n",
-		enonce_buf, rnonce_buf, wlp_assc_error_str(assc_err));
-	result = 0;
-error_parse:
-	return result;
-}
-
-/**
- * Retrieve variable device information from association message
- *
- * The device information parsed is not required in any message. This
- * routine will thus not fail if an attribute is not present.
- * The attributes are expected in a certain order, even if all are not
- * present. The "attribute type" value is used to ensure the attributes
- * are parsed in the correct order.
- *
- * If an error is encountered during parsing the function will return an
- * error code, when this happens the given device_info structure may be
- * partially filled.
- */
-static
-int wlp_get_variable_info(struct wlp *wlp, void *data,
-			  struct wlp_device_info *dev_info, ssize_t len)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	size_t used = 0;
-	struct wlp_attr_hdr *hdr;
-	ssize_t result = 0;
-	unsigned last = 0;
-
-	while (len - used > 0) {
-		if (len - used < sizeof(*hdr)) {
-			dev_err(dev, "WLP: Partial data in frame, cannot "
-				"parse. \n");
-			goto error_parse;
-		}
-		hdr = data + used;
-		switch (le16_to_cpu(hdr->type)) {
-		case WLP_ATTR_MANUF:
-			if (last >= WLP_ATTR_MANUF) {
-				dev_err(dev, "WLP: Incorrect order of "
-					"attribute values in D1 msg.\n");
-				goto error_parse;
-			}
-			result = wlp_get_manufacturer(wlp, data + used,
-						      dev_info->manufacturer,
-						      len - used);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to obtain "
-					"Manufacturer attribute from D1 "
-					"message.\n");
-				goto error_parse;
-			}
-			last = WLP_ATTR_MANUF;
-			used += result;
-			break;
-		case WLP_ATTR_MODEL_NAME:
-			if (last >= WLP_ATTR_MODEL_NAME) {
-				dev_err(dev, "WLP: Incorrect order of "
-					"attribute values in D1 msg.\n");
-				goto error_parse;
-			}
-			result = wlp_get_model_name(wlp, data + used,
-						    dev_info->model_name,
-						    len - used);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to obtain Model "
-					"name attribute from D1 message.\n");
-				goto error_parse;
-			}
-			last = WLP_ATTR_MODEL_NAME;
-			used += result;
-			break;
-		case WLP_ATTR_MODEL_NR:
-			if (last >= WLP_ATTR_MODEL_NR) {
-				dev_err(dev, "WLP: Incorrect order of "
-					"attribute values in D1 msg.\n");
-				goto error_parse;
-			}
-			result = wlp_get_model_nr(wlp, data + used,
-						  dev_info->model_nr,
-						  len - used);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to obtain Model "
-					"number attribute from D1 message.\n");
-				goto error_parse;
-			}
-			last = WLP_ATTR_MODEL_NR;
-			used += result;
-			break;
-		case WLP_ATTR_SERIAL:
-			if (last >= WLP_ATTR_SERIAL) {
-				dev_err(dev, "WLP: Incorrect order of "
-					"attribute values in D1 msg.\n");
-				goto error_parse;
-			}
-			result = wlp_get_serial(wlp, data + used,
-						dev_info->serial, len - used);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to obtain Serial "
-					"number attribute from D1 message.\n");
-				goto error_parse;
-			}
-			last = WLP_ATTR_SERIAL;
-			used += result;
-			break;
-		case WLP_ATTR_PRI_DEV_TYPE:
-			if (last >= WLP_ATTR_PRI_DEV_TYPE) {
-				dev_err(dev, "WLP: Incorrect order of "
-					"attribute values in D1 msg.\n");
-				goto error_parse;
-			}
-			result = wlp_get_prim_dev_type(wlp, data + used,
-						       &dev_info->prim_dev_type,
-						       len - used);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to obtain Primary "
-					"device type attribute from D1 "
-					"message.\n");
-				goto error_parse;
-			}
-			dev_info->prim_dev_type.category =
-				le16_to_cpu(dev_info->prim_dev_type.category);
-			dev_info->prim_dev_type.subID =
-				le16_to_cpu(dev_info->prim_dev_type.subID);
-			last = WLP_ATTR_PRI_DEV_TYPE;
-			used += result;
-			break;
-		default:
-			/* This is not variable device information. */
-			goto out;
-			break;
-		}
-	}
-out:
-	return used;
-error_parse:
-	return -EINVAL;
-}
-
-/**
- * Parse incoming D1 frame, populate attribute values
- *
- * Caller provides pointers to memory already allocated for attributes
- * expected in the D1 frame. These variables will be populated.
- */
-static
-int wlp_parse_d1_frame(struct wlp *wlp, struct sk_buff *skb,
-		       struct wlp_uuid *uuid_e,
-		       enum wlp_wss_sel_mthd *sel_mthd,
-		       struct wlp_device_info *dev_info,
-		       enum wlp_assc_error *assc_err)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *d1 = (void *) skb->data;
-	void *ptr = skb->data;
-	size_t len = skb->len;
-	size_t used;
-	ssize_t result;
-
-	used = sizeof(*d1);
-	result = wlp_get_uuid_e(wlp, ptr + used, uuid_e, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain UUID-E attribute from D1 "
-			"message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wss_sel_mthd(wlp, ptr + used, sel_mthd, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS selection method "
-			"from D1 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_dev_name(wlp, ptr + used, dev_info->name,
-				     len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Device Name from D1 "
-			"message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_variable_info(wlp, ptr + used, dev_info, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Device Information from "
-			"D1 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wlp_assc_err(wlp, ptr + used, assc_err, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WLP Association Error "
-			"Information from D1 message.\n");
-		goto error_parse;
-	}
-	result = 0;
-error_parse:
-	return result;
-}
-/**
- * Handle incoming D1 frame
- *
- * The frame has already been verified to contain an Association header with
- * the correct version number. Parse the incoming frame, construct and send
- * a D2 frame in response.
- *
- * It is not clear what to do with most fields in the incoming D1 frame. We
- * retrieve and discard the information here for now.
- */
-void wlp_handle_d1_frame(struct work_struct *ws)
-{
-	struct wlp_assoc_frame_ctx *frame_ctx = container_of(ws,
-						  struct wlp_assoc_frame_ctx,
-						  ws);
-	struct wlp *wlp = frame_ctx->wlp;
-	struct wlp_wss *wss = &wlp->wss;
-	struct sk_buff *skb = frame_ctx->skb;
-	struct uwb_dev_addr *src = &frame_ctx->src;
-	int result;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_uuid uuid_e;
-	enum wlp_wss_sel_mthd sel_mthd = 0;
-	struct wlp_device_info dev_info;
-	enum wlp_assc_error assc_err;
-	struct sk_buff *resp = NULL;
-
-	/* Parse D1 frame */
-	mutex_lock(&wss->mutex);
-	mutex_lock(&wlp->mutex); /* to access wlp->uuid */
-	memset(&dev_info, 0, sizeof(dev_info));
-	result = wlp_parse_d1_frame(wlp, skb, &uuid_e, &sel_mthd, &dev_info,
-				    &assc_err);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to parse incoming D1 frame.\n");
-		kfree_skb(skb);
-		goto out;
-	}
-
-	kfree_skb(skb);
-	if (!wlp_uuid_is_set(&wlp->uuid)) {
-		dev_err(dev, "WLP: UUID is not set. Set via sysfs to "
-			"proceed. Respong to D1 message with error F0.\n");
-		result = wlp_build_assoc_f0(wlp, &resp,
-					    WLP_ASSOC_ERROR_NOT_READY);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to construct F0 message.\n");
-			goto out;
-		}
-	} else {
-		/* Construct D2 frame */
-		result = wlp_build_assoc_d2(wlp, wss, &resp, &uuid_e);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to construct D2 message.\n");
-			goto out;
-		}
-	}
-	/* Send D2 frame */
-	BUG_ON(wlp->xmit_frame == NULL);
-	result = wlp->xmit_frame(wlp, resp, src);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to transmit D2 association "
-			"message: %d\n", result);
-		if (result == -ENXIO)
-			dev_err(dev, "WLP: Is network interface up? \n");
-		/* We could try again ... */
-		dev_kfree_skb_any(resp); /* we need to free if tx fails */
-	}
-out:
-	kfree(frame_ctx);
-	mutex_unlock(&wlp->mutex);
-	mutex_unlock(&wss->mutex);
-}
-
-/**
- * Parse incoming D2 frame, create and populate temporary cache
- *
- * @skb: socket buffer in which D2 frame can be found
- * @neighbor: the neighbor that sent the D2 frame
- *
- * Will allocate memory for temporary storage of information learned during
- * discovery.
- */
-int wlp_parse_d2_frame_to_cache(struct wlp *wlp, struct sk_buff *skb,
-				struct wlp_neighbor_e *neighbor)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *d2 = (void *) skb->data;
-	void *ptr = skb->data;
-	size_t len = skb->len;
-	size_t used;
-	ssize_t result;
-	struct wlp_uuid uuid_e;
-	struct wlp_device_info *nb_info;
-	enum wlp_assc_error assc_err;
-
-	used = sizeof(*d2);
-	result = wlp_get_uuid_e(wlp, ptr + used, &uuid_e, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain UUID-E attribute from D2 "
-			"message.\n");
-		goto error_parse;
-	}
-	if (memcmp(&uuid_e, &wlp->uuid, sizeof(uuid_e))) {
-		dev_err(dev, "WLP: UUID-E in incoming D2 does not match "
-			"local UUID sent in D1. \n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_uuid_r(wlp, ptr + used, &neighbor->uuid, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain UUID-R attribute from D2 "
-			"message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wss_info_to_cache(wlp, ptr + used, neighbor,
-					   len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS information "
-			"from D2 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	neighbor->info = kzalloc(sizeof(struct wlp_device_info), GFP_KERNEL);
-	if (neighbor->info == NULL) {
-		dev_err(dev, "WLP: cannot allocate memory to store device "
-			"info.\n");
-		result = -ENOMEM;
-		goto error_parse;
-	}
-	nb_info = neighbor->info;
-	result = wlp_get_dev_name(wlp, ptr + used, nb_info->name,
-				  len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Device Name from D2 "
-			"message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_variable_info(wlp, ptr + used, nb_info, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Device Information from "
-			"D2 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wlp_assc_err(wlp, ptr + used, &assc_err, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WLP Association Error "
-			"Information from D2 message.\n");
-		goto error_parse;
-	}
-	if (assc_err != WLP_ASSOC_ERROR_NONE) {
-		dev_err(dev, "WLP: neighbor device returned association "
-			"error %d\n", assc_err);
-		result = -EINVAL;
-		goto error_parse;
-	}
-	result = 0;
-error_parse:
-	if (result < 0)
-		wlp_remove_neighbor_tmp_info(neighbor);
-	return result;
-}
-
-/**
- * Parse incoming D2 frame, populate attribute values of WSS bein enrolled in
- *
- * @wss: our WSS that will be enrolled
- * @skb: socket buffer in which D2 frame can be found
- * @neighbor: the neighbor that sent the D2 frame
- * @wssid: the wssid of the WSS in which we want to enroll
- *
- * Forms part of enrollment sequence. We are trying to enroll in WSS with
- * @wssid by using @neighbor as registrar. A D1 message was sent to
- * @neighbor and now we need to parse the D2 response. The neighbor's
- * response is searched for the requested WSS and if found (and it accepts
- * enrollment), we store the information.
- */
-int wlp_parse_d2_frame_to_enroll(struct wlp_wss *wss, struct sk_buff *skb,
-				 struct wlp_neighbor_e *neighbor,
-				 struct wlp_uuid *wssid)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	void *ptr = skb->data;
-	size_t len = skb->len;
-	size_t used;
-	ssize_t result;
-	struct wlp_uuid uuid_e;
-	struct wlp_uuid uuid_r;
-	struct wlp_device_info nb_info;
-	enum wlp_assc_error assc_err;
-	char uuid_bufA[WLP_WSS_UUID_STRSIZE];
-	char uuid_bufB[WLP_WSS_UUID_STRSIZE];
-
-	used = sizeof(struct wlp_frame_assoc);
-	result = wlp_get_uuid_e(wlp, ptr + used, &uuid_e, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain UUID-E attribute from D2 "
-			"message.\n");
-		goto error_parse;
-	}
-	if (memcmp(&uuid_e, &wlp->uuid, sizeof(uuid_e))) {
-		dev_err(dev, "WLP: UUID-E in incoming D2 does not match "
-			"local UUID sent in D1. \n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_uuid_r(wlp, ptr + used, &uuid_r, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain UUID-R attribute from D2 "
-			"message.\n");
-		goto error_parse;
-	}
-	if (memcmp(&uuid_r, &neighbor->uuid, sizeof(uuid_r))) {
-		wlp_wss_uuid_print(uuid_bufA, sizeof(uuid_bufA),
-				   &neighbor->uuid);
-		wlp_wss_uuid_print(uuid_bufB, sizeof(uuid_bufB), &uuid_r);
-		dev_err(dev, "WLP: UUID of neighbor does not match UUID "
-			"learned during discovery. Originally discovered: %s, "
-			"now from D2 message: %s\n", uuid_bufA, uuid_bufB);
-		result = -EINVAL;
-		goto error_parse;
-	}
-	used += result;
-	wss->wssid = *wssid;
-	result = wlp_get_wss_info_to_enroll(wlp, ptr + used, wss, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS information "
-			"from D2 message.\n");
-		goto error_parse;
-	}
-	if (wss->state != WLP_WSS_STATE_PART_ENROLLED) {
-		dev_err(dev, "WLP: D2 message did not contain information "
-			"for successful enrollment. \n");
-		result = -EINVAL;
-		goto error_parse;
-	}
-	used += result;
-	/* Place device information on stack to continue parsing of message */
-	result = wlp_get_dev_name(wlp, ptr + used, nb_info.name,
-				  len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Device Name from D2 "
-			"message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_variable_info(wlp, ptr + used, &nb_info, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain Device Information from "
-			"D2 message.\n");
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wlp_assc_err(wlp, ptr + used, &assc_err, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WLP Association Error "
-			"Information from D2 message.\n");
-		goto error_parse;
-	}
-	if (assc_err != WLP_ASSOC_ERROR_NONE) {
-		dev_err(dev, "WLP: neighbor device returned association "
-			"error %d\n", assc_err);
-		if (wss->state == WLP_WSS_STATE_PART_ENROLLED) {
-			dev_err(dev, "WLP: Enrolled in WSS (should not "
-				"happen according to spec). Undoing. \n");
-			wlp_wss_reset(wss);
-		}
-		result = -EINVAL;
-		goto error_parse;
-	}
-	result = 0;
-error_parse:
-	return result;
-}
-
-/**
- * Parse C3/C4 frame into provided variables
- *
- * @wssid: will point to copy of wssid retrieved from C3/C4 frame
- * @tag:   will point to copy of tag retrieved from C3/C4 frame
- * @virt_addr: will point to copy of virtual address retrieved from C3/C4
- * frame.
- *
- * Calling function has to allocate memory for these values.
- *
- * skb contains a valid C3/C4 frame, return the individual fields of this
- * frame in the provided variables.
- */
-int wlp_parse_c3c4_frame(struct wlp *wlp, struct sk_buff *skb,
-		       struct wlp_uuid *wssid, u8 *tag,
-		       struct uwb_mac_addr *virt_addr)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result;
-	void *ptr = skb->data;
-	size_t len = skb->len;
-	size_t used;
-	struct wlp_frame_assoc *assoc = ptr;
-
-	used = sizeof(*assoc);
-	result = wlp_get_wssid(wlp, ptr + used, wssid, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSSID attribute from "
-			"%s message.\n", wlp_assoc_frame_str(assoc->type));
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wss_tag(wlp, ptr + used, tag, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS tag attribute from "
-			"%s message.\n", wlp_assoc_frame_str(assoc->type));
-		goto error_parse;
-	}
-	used += result;
-	result = wlp_get_wss_virt(wlp, ptr + used, virt_addr, len - used);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSS virtual address "
-			"attribute from %s message.\n",
-			wlp_assoc_frame_str(assoc->type));
-		goto error_parse;
-	}
-error_parse:
-	return result;
-}
-
-/**
- * Allocate memory for and populate fields of C1 or C2 association frame
- *
- * The C1 and C2 association frames appear identical - except for the type.
- */
-static
-int wlp_build_assoc_c1c2(struct wlp *wlp, struct wlp_wss *wss,
-			 struct sk_buff **skb, enum wlp_assoc_type type)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result  = -ENOMEM;
-	struct {
-		struct wlp_frame_assoc c_hdr;
-		struct wlp_attr_wssid wssid;
-	} *c;
-	struct sk_buff *_skb;
-
-	_skb = dev_alloc_skb(sizeof(*c));
-	if (_skb == NULL) {
-		dev_err(dev, "WLP: Unable to allocate memory for C1/C2 "
-			"association frame. \n");
-		goto error_alloc;
-	}
-	c = (void *) _skb->data;
-	c->c_hdr.hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
-	c->c_hdr.hdr.type = WLP_FRAME_ASSOCIATION;
-	c->c_hdr.type = type;
-	wlp_set_version(&c->c_hdr.version, WLP_VERSION);
-	wlp_set_msg_type(&c->c_hdr.msg_type, type);
-	wlp_set_wssid(&c->wssid, &wss->wssid);
-	skb_put(_skb, sizeof(*c));
-	*skb = _skb;
-	result = 0;
-error_alloc:
-	return result;
-}
-
-
-static
-int wlp_build_assoc_c1(struct wlp *wlp, struct wlp_wss *wss,
-		       struct sk_buff **skb)
-{
-	return wlp_build_assoc_c1c2(wlp, wss, skb, WLP_ASSOC_C1);
-}
-
-static
-int wlp_build_assoc_c2(struct wlp *wlp, struct wlp_wss *wss,
-		       struct sk_buff **skb)
-{
-	return wlp_build_assoc_c1c2(wlp, wss, skb, WLP_ASSOC_C2);
-}
-
-
-/**
- * Allocate memory for and populate fields of C3 or C4 association frame
- *
- * The C3 and C4 association frames appear identical - except for the type.
- */
-static
-int wlp_build_assoc_c3c4(struct wlp *wlp, struct wlp_wss *wss,
-			 struct sk_buff **skb, enum wlp_assoc_type type)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result  = -ENOMEM;
-	struct {
-		struct wlp_frame_assoc c_hdr;
-		struct wlp_attr_wssid wssid;
-		struct wlp_attr_wss_tag wss_tag;
-		struct wlp_attr_wss_virt wss_virt;
-	} *c;
-	struct sk_buff *_skb;
-
-	_skb = dev_alloc_skb(sizeof(*c));
-	if (_skb == NULL) {
-		dev_err(dev, "WLP: Unable to allocate memory for C3/C4 "
-			"association frame. \n");
-		goto error_alloc;
-	}
-	c = (void *) _skb->data;
-	c->c_hdr.hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
-	c->c_hdr.hdr.type = WLP_FRAME_ASSOCIATION;
-	c->c_hdr.type = type;
-	wlp_set_version(&c->c_hdr.version, WLP_VERSION);
-	wlp_set_msg_type(&c->c_hdr.msg_type, type);
-	wlp_set_wssid(&c->wssid, &wss->wssid);
-	wlp_set_wss_tag(&c->wss_tag, wss->tag);
-	wlp_set_wss_virt(&c->wss_virt, &wss->virtual_addr);
-	skb_put(_skb, sizeof(*c));
-	*skb = _skb;
-	result = 0;
-error_alloc:
-	return result;
-}
-
-static
-int wlp_build_assoc_c3(struct wlp *wlp, struct wlp_wss *wss,
-		       struct sk_buff **skb)
-{
-	return wlp_build_assoc_c3c4(wlp, wss, skb, WLP_ASSOC_C3);
-}
-
-static
-int wlp_build_assoc_c4(struct wlp *wlp, struct wlp_wss *wss,
-		       struct sk_buff **skb)
-{
-	return wlp_build_assoc_c3c4(wlp, wss, skb, WLP_ASSOC_C4);
-}
-
-
-#define wlp_send_assoc(type, id)					\
-static int wlp_send_assoc_##type(struct wlp *wlp, struct wlp_wss *wss,	\
-				 struct uwb_dev_addr *dev_addr)		\
-{									\
-	struct device *dev = &wlp->rc->uwb_dev.dev;			\
-	int result;							\
-	struct sk_buff *skb = NULL;					\
-									\
-	/* Build the frame */						\
-	result = wlp_build_assoc_##type(wlp, wss, &skb);		\
-	if (result < 0) {						\
-		dev_err(dev, "WLP: Unable to construct %s association "	\
-			"frame: %d\n", wlp_assoc_frame_str(id), result);\
-		goto error_build_assoc;					\
-	}								\
-	/* Send the frame */						\
-	BUG_ON(wlp->xmit_frame == NULL);				\
-	result = wlp->xmit_frame(wlp, skb, dev_addr);			\
-	if (result < 0) {						\
-		dev_err(dev, "WLP: Unable to transmit %s association "	\
-			"message: %d\n", wlp_assoc_frame_str(id),	\
-			result);					\
-		if (result == -ENXIO)					\
-			dev_err(dev, "WLP: Is network interface "	\
-				"up? \n");				\
-		goto error_xmit;					\
-	}								\
-	return 0;							\
-error_xmit:								\
-	/* We could try again ... */					\
-	dev_kfree_skb_any(skb);/*we need to free if tx fails*/		\
-error_build_assoc:							\
-	return result;							\
-}
-
-wlp_send_assoc(d1, WLP_ASSOC_D1)
-wlp_send_assoc(c1, WLP_ASSOC_C1)
-wlp_send_assoc(c3, WLP_ASSOC_C3)
-
-int wlp_send_assoc_frame(struct wlp *wlp, struct wlp_wss *wss,
-			 struct uwb_dev_addr *dev_addr,
-			 enum wlp_assoc_type type)
-{
-	int result = 0;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	switch (type) {
-	case WLP_ASSOC_D1:
-		result = wlp_send_assoc_d1(wlp, wss, dev_addr);
-		break;
-	case WLP_ASSOC_C1:
-		result = wlp_send_assoc_c1(wlp, wss, dev_addr);
-		break;
-	case WLP_ASSOC_C3:
-		result = wlp_send_assoc_c3(wlp, wss, dev_addr);
-		break;
-	default:
-		dev_err(dev, "WLP: Received request to send unknown "
-			"association message.\n");
-		result = -EINVAL;
-		break;
-	}
-	return result;
-}
-
-/**
- * Handle incoming C1 frame
- *
- * The frame has already been verified to contain an Association header with
- * the correct version number. Parse the incoming frame, construct and send
- * a C2 frame in response.
- */
-void wlp_handle_c1_frame(struct work_struct *ws)
-{
-	struct wlp_assoc_frame_ctx *frame_ctx = container_of(ws,
-						  struct wlp_assoc_frame_ctx,
-						  ws);
-	struct wlp *wlp = frame_ctx->wlp;
-	struct wlp_wss *wss = &wlp->wss;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *c1 = (void *) frame_ctx->skb->data;
-	unsigned int len = frame_ctx->skb->len;
-	struct uwb_dev_addr *src = &frame_ctx->src;
-	int result;
-	struct wlp_uuid wssid;
-	struct sk_buff *resp = NULL;
-
-	/* Parse C1 frame */
-	mutex_lock(&wss->mutex);
-	result = wlp_get_wssid(wlp, (void *)c1 + sizeof(*c1), &wssid,
-			       len - sizeof(*c1));
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSSID from C1 frame.\n");
-		goto out;
-	}
-	if (!memcmp(&wssid, &wss->wssid, sizeof(wssid))
-	    && wss->state == WLP_WSS_STATE_ACTIVE) {
-		/* Construct C2 frame */
-		result = wlp_build_assoc_c2(wlp, wss, &resp);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to construct C2 message.\n");
-			goto out;
-		}
-	} else {
-		/* Construct F0 frame */
-		result = wlp_build_assoc_f0(wlp, &resp, WLP_ASSOC_ERROR_INV);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to construct F0 message.\n");
-			goto out;
-		}
-	}
-	/* Send C2 frame */
-	BUG_ON(wlp->xmit_frame == NULL);
-	result = wlp->xmit_frame(wlp, resp, src);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to transmit response association "
-			"message: %d\n", result);
-		if (result == -ENXIO)
-			dev_err(dev, "WLP: Is network interface up? \n");
-		/* We could try again ... */
-		dev_kfree_skb_any(resp); /* we need to free if tx fails */
-	}
-out:
-	kfree_skb(frame_ctx->skb);
-	kfree(frame_ctx);
-	mutex_unlock(&wss->mutex);
-}
-
-/**
- * Handle incoming C3 frame
- *
- * The frame has already been verified to contain an Association header with
- * the correct version number. Parse the incoming frame, construct and send
- * a C4 frame in response. If the C3 frame identifies a WSS that is locally
- * active then we connect to this neighbor (add it to our EDA cache).
- */
-void wlp_handle_c3_frame(struct work_struct *ws)
-{
-	struct wlp_assoc_frame_ctx *frame_ctx = container_of(ws,
-						  struct wlp_assoc_frame_ctx,
-						  ws);
-	struct wlp *wlp = frame_ctx->wlp;
-	struct wlp_wss *wss = &wlp->wss;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct sk_buff *skb = frame_ctx->skb;
-	struct uwb_dev_addr *src = &frame_ctx->src;
-	int result;
-	struct sk_buff *resp = NULL;
-	struct wlp_uuid wssid;
-	u8 tag;
-	struct uwb_mac_addr virt_addr;
-
-	/* Parse C3 frame */
-	mutex_lock(&wss->mutex);
-	result = wlp_parse_c3c4_frame(wlp, skb, &wssid, &tag, &virt_addr);
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain values from C3 frame.\n");
-		goto out;
-	}
-	if (!memcmp(&wssid, &wss->wssid, sizeof(wssid))
-	    && wss->state >= WLP_WSS_STATE_ACTIVE) {
-		result = wlp_eda_update_node(&wlp->eda, src, wss,
-					     (void *) virt_addr.data, tag,
-					     WLP_WSS_CONNECTED);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to update EDA cache "
-				"with new connected neighbor information.\n");
-			result = wlp_build_assoc_f0(wlp, &resp,
-						    WLP_ASSOC_ERROR_INT);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to construct F0 "
-					"message.\n");
-				goto out;
-			}
-		} else {
-			wss->state = WLP_WSS_STATE_CONNECTED;
-			/* Construct C4 frame */
-			result = wlp_build_assoc_c4(wlp, wss, &resp);
-			if (result < 0) {
-				dev_err(dev, "WLP: Unable to construct C4 "
-					"message.\n");
-				goto out;
-			}
-		}
-	} else {
-		/* Construct F0 frame */
-		result = wlp_build_assoc_f0(wlp, &resp, WLP_ASSOC_ERROR_INV);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to construct F0 message.\n");
-			goto out;
-		}
-	}
-	/* Send C4 frame */
-	BUG_ON(wlp->xmit_frame == NULL);
-	result = wlp->xmit_frame(wlp, resp, src);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to transmit response association "
-			"message: %d\n", result);
-		if (result == -ENXIO)
-			dev_err(dev, "WLP: Is network interface up? \n");
-		/* We could try again ... */
-		dev_kfree_skb_any(resp); /* we need to free if tx fails */
-	}
-out:
-	kfree_skb(frame_ctx->skb);
-	kfree(frame_ctx);
-	mutex_unlock(&wss->mutex);
-}
-
-

drivers/uwb/wlp/sysfs.c

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- * sysfs functions
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: Docs
- *
- */
-#include <linux/wlp.h>
-
-#include "wlp-internal.h"
-
-static
-size_t wlp_wss_wssid_e_print(char *buf, size_t bufsize,
-			     struct wlp_wssid_e *wssid_e)
-{
-	size_t used = 0;
-	used += scnprintf(buf, bufsize, " WSS: ");
-	used += wlp_wss_uuid_print(buf + used, bufsize - used,
-				   &wssid_e->wssid);
-
-	if (wssid_e->info != NULL) {
-		used += scnprintf(buf + used, bufsize - used, " ");
-		used += uwb_mac_addr_print(buf + used, bufsize - used,
-					   &wssid_e->info->bcast);
-		used += scnprintf(buf + used, bufsize - used, " %u %u %s\n",
-				  wssid_e->info->accept_enroll,
-				  wssid_e->info->sec_status,
-				  wssid_e->info->name);
-	}
-	return used;
-}
-
-/**
- * Print out information learned from neighbor discovery
- *
- * Some fields being printed may not be included in the device discovery
- * information (it is not mandatory). We are thus careful how the
- * information is printed to ensure it is clear to the user what field is
- * being referenced.
- * The information being printed is for one time use - temporary storage is
- * cleaned after it is printed.
- *
- * Ideally sysfs output should be on one line. The information printed here
- * contain a few strings so it will be hard to parse if they are all
- * printed on the same line - without agreeing on a standard field
- * separator.
- */
-static
-ssize_t wlp_wss_neighborhood_print_remove(struct wlp *wlp, char *buf,
-				   size_t bufsize)
-{
-	size_t used = 0;
-	struct wlp_neighbor_e *neighb;
-	struct wlp_wssid_e *wssid_e;
-
-	mutex_lock(&wlp->nbmutex);
-	used = scnprintf(buf, bufsize, "#Neighbor information\n"
-			 "#uuid dev_addr\n"
-			 "# Device Name:\n# Model Name:\n# Manufacturer:\n"
-			 "# Model Nr:\n# Serial:\n"
-			 "# Pri Dev type: CategoryID OUI OUISubdiv "
-			 "SubcategoryID\n"
-			 "# WSS: WSSID WSS_name accept_enroll sec_status "
-			 "bcast\n"
-			 "# WSS: WSSID WSS_name accept_enroll sec_status "
-			 "bcast\n\n");
-	list_for_each_entry(neighb, &wlp->neighbors, node) {
-		if (bufsize - used <= 0)
-			goto out;
-		used += wlp_wss_uuid_print(buf + used, bufsize - used,
-					   &neighb->uuid);
-		buf[used++] = ' ';
-		used += uwb_dev_addr_print(buf + used, bufsize - used,
-					   &neighb->uwb_dev->dev_addr);
-		if (neighb->info != NULL)
-			used += scnprintf(buf + used, bufsize - used,
-					  "\n Device Name: %s\n"
-					  " Model Name: %s\n"
-					  " Manufacturer:%s \n"
-					  " Model Nr: %s\n"
-					  " Serial: %s\n"
-					  " Pri Dev type: "
-					  "%u %02x:%02x:%02x %u %u\n",
-					  neighb->info->name,
-					  neighb->info->model_name,
-					  neighb->info->manufacturer,
-					  neighb->info->model_nr,
-					  neighb->info->serial,
-					  neighb->info->prim_dev_type.category,
-					  neighb->info->prim_dev_type.OUI[0],
-					  neighb->info->prim_dev_type.OUI[1],
-					  neighb->info->prim_dev_type.OUI[2],
-					  neighb->info->prim_dev_type.OUIsubdiv,
-					  neighb->info->prim_dev_type.subID);
-		list_for_each_entry(wssid_e, &neighb->wssid, node) {
-			used += wlp_wss_wssid_e_print(buf + used,
-						      bufsize - used,
-						      wssid_e);
-		}
-		buf[used++] = '\n';
-		wlp_remove_neighbor_tmp_info(neighb);
-	}
-
-
-out:
-	mutex_unlock(&wlp->nbmutex);
-	return used;
-}
-
-
-/**
- * Show properties of all WSS in neighborhood.
- *
- * Will trigger a complete discovery of WSS activated by this device and
- * its neighbors.
- */
-ssize_t wlp_neighborhood_show(struct wlp *wlp, char *buf)
-{
-	wlp_discover(wlp);
-	return wlp_wss_neighborhood_print_remove(wlp, buf, PAGE_SIZE);
-}
-EXPORT_SYMBOL_GPL(wlp_neighborhood_show);
-
-static
-ssize_t __wlp_wss_properties_show(struct wlp_wss *wss, char *buf,
-				  size_t bufsize)
-{
-	ssize_t result;
-
-	result = wlp_wss_uuid_print(buf, bufsize, &wss->wssid);
-	result += scnprintf(buf + result, bufsize - result, " ");
-	result += uwb_mac_addr_print(buf + result, bufsize - result,
-				     &wss->bcast);
-	result += scnprintf(buf + result, bufsize - result,
-			    " 0x%02x %u ", wss->hash, wss->secure_status);
-	result += wlp_wss_key_print(buf + result, bufsize - result,
-				    wss->master_key);
-	result += scnprintf(buf + result, bufsize - result, " 0x%02x ",
-			    wss->tag);
-	result += uwb_mac_addr_print(buf + result, bufsize - result,
-				     &wss->virtual_addr);
-	result += scnprintf(buf + result, bufsize - result, " %s", wss->name);
-	result += scnprintf(buf + result, bufsize - result,
-			    "\n\n#WSSID\n#WSS broadcast address\n"
-			    "#WSS hash\n#WSS secure status\n"
-			    "#WSS master key\n#WSS local tag\n"
-			    "#WSS local virtual EUI-48\n#WSS name\n");
-	return result;
-}
-
-/**
- * Show which WSS is activated.
- */
-ssize_t wlp_wss_activate_show(struct wlp_wss *wss, char *buf)
-{
-	int result = 0;
-
-	if (mutex_lock_interruptible(&wss->mutex))
-		goto out;
-	if (wss->state >= WLP_WSS_STATE_ACTIVE)
-		result = __wlp_wss_properties_show(wss, buf, PAGE_SIZE);
-	else
-		result = scnprintf(buf, PAGE_SIZE, "No local WSS active.\n");
-	result += scnprintf(buf + result, PAGE_SIZE - result,
-			"\n\n"
-			"# echo WSSID SECURE_STATUS ACCEPT_ENROLLMENT "
-			"NAME #create new WSS\n"
-			"# echo WSSID [DEV ADDR] #enroll in and activate "
-			"existing WSS, can request registrar\n"
-			"#\n"
-			"# WSSID is a 16 byte hex array. Eg. 12 A3 3B ... \n"
-			"# SECURE_STATUS 0 - unsecure, 1 - secure (default)\n"
-			"# ACCEPT_ENROLLMENT 0 - no, 1 - yes (default)\n"
-			"# NAME is the text string identifying the WSS\n"
-			"# DEV ADDR is the device address of neighbor "
-			"that should be registrar. Eg. 32:AB\n");
-
-	mutex_unlock(&wss->mutex);
-out:
-	return result;
-
-}
-EXPORT_SYMBOL_GPL(wlp_wss_activate_show);
-
-/**
- * Create/activate a new WSS or enroll/activate in neighboring WSS
- *
- * The user can provide the WSSID of a WSS in which it wants to enroll.
- * Only the WSSID is necessary if the WSS have been discovered before. If
- * the WSS has not been discovered before, or the user wants to use a
- * particular neighbor as its registrar, then the user can also provide a
- * device address or the neighbor that will be used as registrar.
- *
- * A new WSS is created when the user provides a WSSID, secure status, and
- * WSS name.
- */
-ssize_t wlp_wss_activate_store(struct wlp_wss *wss,
-			       const char *buf, size_t size)
-{
-	ssize_t result = -EINVAL;
-	struct wlp_uuid wssid;
-	struct uwb_dev_addr dev;
-	struct uwb_dev_addr bcast = {.data = {0xff, 0xff} };
-	char name[65];
-	unsigned sec_status, accept;
-	memset(name, 0, sizeof(name));
-	result = sscanf(buf, "%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx:%02hhx",
-			&wssid.data[0] , &wssid.data[1],
-			&wssid.data[2] , &wssid.data[3],
-			&wssid.data[4] , &wssid.data[5],
-			&wssid.data[6] , &wssid.data[7],
-			&wssid.data[8] , &wssid.data[9],
-			&wssid.data[10], &wssid.data[11],
-			&wssid.data[12], &wssid.data[13],
-			&wssid.data[14], &wssid.data[15],
-			&dev.data[1], &dev.data[0]);
-	if (result == 16 || result == 17) {
-		result = sscanf(buf, "%02hhx %02hhx %02hhx %02hhx "
-				"%02hhx %02hhx %02hhx %02hhx "
-				"%02hhx %02hhx %02hhx %02hhx "
-				"%02hhx %02hhx %02hhx %02hhx "
-				"%u %u %64c",
-				&wssid.data[0] , &wssid.data[1],
-				&wssid.data[2] , &wssid.data[3],
-				&wssid.data[4] , &wssid.data[5],
-				&wssid.data[6] , &wssid.data[7],
-				&wssid.data[8] , &wssid.data[9],
-				&wssid.data[10], &wssid.data[11],
-				&wssid.data[12], &wssid.data[13],
-				&wssid.data[14], &wssid.data[15],
-				&sec_status, &accept, name);
-		if (result == 16)
-			result = wlp_wss_enroll_activate(wss, &wssid, &bcast);
-		else if (result == 19) {
-			sec_status = sec_status == 0 ? 0 : 1;
-			accept = accept == 0 ? 0 : 1;
-			/* We read name using %c, so the newline needs to be
-			 * removed */
-			if (strlen(name) != sizeof(name) - 1)
-				name[strlen(name) - 1] = '\0';
-			result = wlp_wss_create_activate(wss, &wssid, name,
-							 sec_status, accept);
-		} else
-			result = -EINVAL;
-	} else if (result == 18)
-		result = wlp_wss_enroll_activate(wss, &wssid, &dev);
-	else
-		result = -EINVAL;
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_wss_activate_store);
-
-/**
- * Show the UUID of this host
- */
-ssize_t wlp_uuid_show(struct wlp *wlp, char *buf)
-{
-	ssize_t result = 0;
-
-	mutex_lock(&wlp->mutex);
-	result = wlp_wss_uuid_print(buf, PAGE_SIZE, &wlp->uuid);
-	buf[result++] = '\n';
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_uuid_show);
-
-/**
- * Store a new UUID for this host
- *
- * According to the spec this should be encoded as an octet string in the
- * order the octets are shown in string representation in RFC 4122 (WLP
- * 0.99 [Table 6])
- *
- * We do not check value provided by user.
- */
-ssize_t wlp_uuid_store(struct wlp *wlp, const char *buf, size_t size)
-{
-	ssize_t result;
-	struct wlp_uuid uuid;
-
-	mutex_lock(&wlp->mutex);
-	result = sscanf(buf, "%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx "
-			"%02hhx %02hhx %02hhx %02hhx ",
-			&uuid.data[0] , &uuid.data[1],
-			&uuid.data[2] , &uuid.data[3],
-			&uuid.data[4] , &uuid.data[5],
-			&uuid.data[6] , &uuid.data[7],
-			&uuid.data[8] , &uuid.data[9],
-			&uuid.data[10], &uuid.data[11],
-			&uuid.data[12], &uuid.data[13],
-			&uuid.data[14], &uuid.data[15]);
-	if (result != 16) {
-		result = -EINVAL;
-		goto error;
-	}
-	wlp->uuid = uuid;
-error:
-	mutex_unlock(&wlp->mutex);
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_uuid_store);
-
-/**
- * Show contents of members of device information structure
- */
-#define wlp_dev_info_show(type)						\
-ssize_t wlp_dev_##type##_show(struct wlp *wlp, char *buf)		\
-{									\
-	ssize_t result = 0;						\
-	mutex_lock(&wlp->mutex);					\
-	if (wlp->dev_info == NULL) {					\
-		result = __wlp_setup_device_info(wlp);			\
-		if (result < 0)						\
-			goto out;					\
-	}								\
-	result = scnprintf(buf, PAGE_SIZE, "%s\n", wlp->dev_info->type);\
-out:									\
-	mutex_unlock(&wlp->mutex);					\
-	return result;							\
-}									\
-EXPORT_SYMBOL_GPL(wlp_dev_##type##_show);
-
-wlp_dev_info_show(name)
-wlp_dev_info_show(model_name)
-wlp_dev_info_show(model_nr)
-wlp_dev_info_show(manufacturer)
-wlp_dev_info_show(serial)
-
-/**
- * Store contents of members of device information structure
- */
-#define wlp_dev_info_store(type, len)					\
-ssize_t wlp_dev_##type##_store(struct wlp *wlp, const char *buf, size_t size)\
-{									\
-	ssize_t result;							\
-	char format[10];						\
-	mutex_lock(&wlp->mutex);					\
-	if (wlp->dev_info == NULL) {					\
-		result = __wlp_alloc_device_info(wlp);			\
-		if (result < 0)						\
-			goto out;					\
-	}								\
-	memset(wlp->dev_info->type, 0, sizeof(wlp->dev_info->type));	\
-	sprintf(format, "%%%uc", len);					\
-	result = sscanf(buf, format, wlp->dev_info->type);		\
-out:									\
-	mutex_unlock(&wlp->mutex);					\
-	return result < 0 ? result : size;				\
-}									\
-EXPORT_SYMBOL_GPL(wlp_dev_##type##_store);
-
-wlp_dev_info_store(name, 32)
-wlp_dev_info_store(manufacturer, 64)
-wlp_dev_info_store(model_name, 32)
-wlp_dev_info_store(model_nr, 32)
-wlp_dev_info_store(serial, 32)
-
-static
-const char *__wlp_dev_category[] = {
-	[WLP_DEV_CAT_COMPUTER] = "Computer",
-	[WLP_DEV_CAT_INPUT] = "Input device",
-	[WLP_DEV_CAT_PRINT_SCAN_FAX_COPIER] = "Printer, scanner, FAX, or "
-					      "Copier",
-	[WLP_DEV_CAT_CAMERA] = "Camera",
-	[WLP_DEV_CAT_STORAGE] = "Storage Network",
-	[WLP_DEV_CAT_INFRASTRUCTURE] = "Infrastructure",
-	[WLP_DEV_CAT_DISPLAY] = "Display",
-	[WLP_DEV_CAT_MULTIM] = "Multimedia device",
-	[WLP_DEV_CAT_GAMING] = "Gaming device",
-	[WLP_DEV_CAT_TELEPHONE] = "Telephone",
-	[WLP_DEV_CAT_OTHER] = "Other",
-};
-
-static
-const char *wlp_dev_category_str(unsigned cat)
-{
-	if ((cat >= WLP_DEV_CAT_COMPUTER && cat <= WLP_DEV_CAT_TELEPHONE)
-	    || cat == WLP_DEV_CAT_OTHER)
-		return __wlp_dev_category[cat];
-	return "unknown category";
-}
-
-ssize_t wlp_dev_prim_category_show(struct wlp *wlp, char *buf)
-{
-	ssize_t result = 0;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_setup_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = scnprintf(buf, PAGE_SIZE, "%s\n",
-		  wlp_dev_category_str(wlp->dev_info->prim_dev_type.category));
-out:
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_category_show);
-
-ssize_t wlp_dev_prim_category_store(struct wlp *wlp, const char *buf,
-				    size_t size)
-{
-	ssize_t result;
-	u16 cat;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_alloc_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = sscanf(buf, "%hu", &cat);
-	if ((cat >= WLP_DEV_CAT_COMPUTER && cat <= WLP_DEV_CAT_TELEPHONE)
-	    || cat == WLP_DEV_CAT_OTHER)
-		wlp->dev_info->prim_dev_type.category = cat;
-	else
-		result = -EINVAL;
-out:
-	mutex_unlock(&wlp->mutex);
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_category_store);
-
-ssize_t wlp_dev_prim_OUI_show(struct wlp *wlp, char *buf)
-{
-	ssize_t result = 0;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_setup_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = scnprintf(buf, PAGE_SIZE, "%02x:%02x:%02x\n",
-			   wlp->dev_info->prim_dev_type.OUI[0],
-			   wlp->dev_info->prim_dev_type.OUI[1],
-			   wlp->dev_info->prim_dev_type.OUI[2]);
-out:
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_OUI_show);
-
-ssize_t wlp_dev_prim_OUI_store(struct wlp *wlp, const char *buf, size_t size)
-{
-	ssize_t result;
-	u8 OUI[3];
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_alloc_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = sscanf(buf, "%hhx:%hhx:%hhx",
-			&OUI[0], &OUI[1], &OUI[2]);
-	if (result != 3) {
-		result = -EINVAL;
-		goto out;
-	} else
-		memcpy(wlp->dev_info->prim_dev_type.OUI, OUI, sizeof(OUI));
-out:
-	mutex_unlock(&wlp->mutex);
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_OUI_store);
-
-
-ssize_t wlp_dev_prim_OUI_sub_show(struct wlp *wlp, char *buf)
-{
-	ssize_t result = 0;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_setup_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = scnprintf(buf, PAGE_SIZE, "%u\n",
-			   wlp->dev_info->prim_dev_type.OUIsubdiv);
-out:
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_OUI_sub_show);
-
-ssize_t wlp_dev_prim_OUI_sub_store(struct wlp *wlp, const char *buf,
-				   size_t size)
-{
-	ssize_t result;
-	unsigned sub;
-	u8 max_sub = ~0;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_alloc_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = sscanf(buf, "%u", &sub);
-	if (sub <= max_sub)
-		wlp->dev_info->prim_dev_type.OUIsubdiv = sub;
-	else
-		result = -EINVAL;
-out:
-	mutex_unlock(&wlp->mutex);
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_OUI_sub_store);
-
-ssize_t wlp_dev_prim_subcat_show(struct wlp *wlp, char *buf)
-{
-	ssize_t result = 0;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_setup_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = scnprintf(buf, PAGE_SIZE, "%u\n",
-			   wlp->dev_info->prim_dev_type.subID);
-out:
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_subcat_show);
-
-ssize_t wlp_dev_prim_subcat_store(struct wlp *wlp, const char *buf,
-				  size_t size)
-{
-	ssize_t result;
-	unsigned sub;
-	__le16 max_sub = ~0;
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info == NULL) {
-		result = __wlp_alloc_device_info(wlp);
-		if (result < 0)
-			goto out;
-	}
-	result = sscanf(buf, "%u", &sub);
-	if (sub <= max_sub)
-		wlp->dev_info->prim_dev_type.subID = sub;
-	else
-		result = -EINVAL;
-out:
-	mutex_unlock(&wlp->mutex);
-	return result < 0 ? result : size;
-}
-EXPORT_SYMBOL_GPL(wlp_dev_prim_subcat_store);
-
-/**
- * Subsystem implementation for interaction with individual WSS via sysfs
- *
- * Followed instructions for subsystem in Documentation/filesystems/sysfs.txt
- */
-
-#define kobj_to_wlp_wss(obj) container_of(obj, struct wlp_wss, kobj)
-#define attr_to_wlp_wss_attr(_attr) \
-	container_of(_attr, struct wlp_wss_attribute, attr)
-
-/**
- * Sysfs subsystem: forward read calls
- *
- * Sysfs operation for forwarding read call to the show method of the
- * attribute owner
- */
-static
-ssize_t wlp_wss_attr_show(struct kobject *kobj, struct attribute *attr,
-			  char *buf)
-{
-	struct wlp_wss_attribute *wss_attr = attr_to_wlp_wss_attr(attr);
-	struct wlp_wss *wss = kobj_to_wlp_wss(kobj);
-	ssize_t ret = -EIO;
-
-	if (wss_attr->show)
-		ret = wss_attr->show(wss, buf);
-	return ret;
-}
-/**
- * Sysfs subsystem: forward write calls
- *
- * Sysfs operation for forwarding write call to the store method of the
- * attribute owner
- */
-static
-ssize_t wlp_wss_attr_store(struct kobject *kobj, struct attribute *attr,
-			   const char *buf, size_t count)
-{
-	struct wlp_wss_attribute *wss_attr = attr_to_wlp_wss_attr(attr);
-	struct wlp_wss *wss = kobj_to_wlp_wss(kobj);
-	ssize_t ret = -EIO;
-
-	if (wss_attr->store)
-		ret = wss_attr->store(wss, buf, count);
-	return ret;
-}
-
-static const struct sysfs_ops wss_sysfs_ops = {
-	.show	= wlp_wss_attr_show,
-	.store	= wlp_wss_attr_store,
-};
-
-struct kobj_type wss_ktype = {
-	.release	= wlp_wss_release,
-	.sysfs_ops	= &wss_sysfs_ops,
-};
-
-
-/**
- * Sysfs files for individual WSS
- */
-
-/**
- * Print static properties of this WSS
- *
- * The name of a WSS may not be null teminated. It's max size is 64 bytes
- * so we copy it to a larger array just to make sure we print sane data.
- */
-static ssize_t wlp_wss_properties_show(struct wlp_wss *wss, char *buf)
-{
-	int result = 0;
-
-	if (mutex_lock_interruptible(&wss->mutex))
-		goto out;
-	result = __wlp_wss_properties_show(wss, buf, PAGE_SIZE);
-	mutex_unlock(&wss->mutex);
-out:
-	return result;
-}
-WSS_ATTR(properties, S_IRUGO, wlp_wss_properties_show, NULL);
-
-/**
- * Print all connected members of this WSS
- * The EDA cache contains all members of WSS neighborhood.
- */
-static ssize_t wlp_wss_members_show(struct wlp_wss *wss, char *buf)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	return wlp_eda_show(wlp, buf);
-}
-WSS_ATTR(members, S_IRUGO, wlp_wss_members_show, NULL);
-
-static
-const char *__wlp_strstate[] = {
-	"none",
-	"partially enrolled",
-	"enrolled",
-	"active",
-	"connected",
-};
-
-static const char *wlp_wss_strstate(unsigned state)
-{
-	if (state >= ARRAY_SIZE(__wlp_strstate))
-		return "unknown state";
-	return __wlp_strstate[state];
-}
-
-/*
- * Print current state of this WSS
- */
-static ssize_t wlp_wss_state_show(struct wlp_wss *wss, char *buf)
-{
-	int result = 0;
-
-	if (mutex_lock_interruptible(&wss->mutex))
-		goto out;
-	result = scnprintf(buf, PAGE_SIZE, "%s\n",
-			   wlp_wss_strstate(wss->state));
-	mutex_unlock(&wss->mutex);
-out:
-	return result;
-}
-WSS_ATTR(state, S_IRUGO, wlp_wss_state_show, NULL);
-
-
-static
-struct attribute *wss_attrs[] = {
-	&wss_attr_properties.attr,
-	&wss_attr_members.attr,
-	&wss_attr_state.attr,
-	NULL,
-};
-
-struct attribute_group wss_attr_group = {
-	.name = NULL,	/* we want them in the same directory */
-	.attrs = wss_attrs,
-};

drivers/uwb/wlp/txrx.c

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- * Message exchange infrastructure
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: Docs
- *
- */
-
-#include <linux/etherdevice.h>
-#include <linux/slab.h>
-#include <linux/wlp.h>
-
-#include "wlp-internal.h"
-
-/*
- * Direct incoming association msg to correct parsing routine
- *
- * We only expect D1, E1, C1, C3 messages as new. All other incoming
- * association messages should form part of an established session that is
- * handled elsewhere.
- * The handling of these messages often require calling sleeping functions
- * - this cannot be done in interrupt context. We use the kernel's
- * workqueue to handle these messages.
- */
-static
-void wlp_direct_assoc_frame(struct wlp *wlp, struct sk_buff *skb,
-			   struct uwb_dev_addr *src)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *assoc = (void *) skb->data;
-	struct wlp_assoc_frame_ctx *frame_ctx;
-
-	frame_ctx = kmalloc(sizeof(*frame_ctx), GFP_ATOMIC);
-	if (frame_ctx == NULL) {
-		dev_err(dev, "WLP: Unable to allocate memory for association "
-			"frame handling.\n");
-		kfree_skb(skb);
-		return;
-	}
-	frame_ctx->wlp = wlp;
-	frame_ctx->skb = skb;
-	frame_ctx->src = *src;
-	switch (assoc->type) {
-	case WLP_ASSOC_D1:
-		INIT_WORK(&frame_ctx->ws, wlp_handle_d1_frame);
-		schedule_work(&frame_ctx->ws);
-		break;
-	case WLP_ASSOC_E1:
-		kfree_skb(skb); /* Temporary until we handle it */
-		kfree(frame_ctx); /* Temporary until we handle it */
-		break;
-	case WLP_ASSOC_C1:
-		INIT_WORK(&frame_ctx->ws, wlp_handle_c1_frame);
-		schedule_work(&frame_ctx->ws);
-		break;
-	case WLP_ASSOC_C3:
-		INIT_WORK(&frame_ctx->ws, wlp_handle_c3_frame);
-		schedule_work(&frame_ctx->ws);
-		break;
-	default:
-		dev_err(dev, "Received unexpected association frame. "
-			"Type = %d \n", assoc->type);
-		kfree_skb(skb);
-		kfree(frame_ctx);
-		break;
-	}
-}
-
-/*
- * Process incoming association frame
- *
- * Although it could be possible to deal with some incoming association
- * messages without creating a new session we are keeping things simple. We
- * do not accept new association messages if there is a session in progress
- * and the messages do not belong to that session.
- *
- * If an association message arrives that causes the creation of a session
- * (WLP_ASSOC_E1) while we are in the process of creating a session then we
- * rely on the neighbor mutex to protect the data. That is, the new session
- * will not be started until the previous is completed.
- */
-static
-void wlp_receive_assoc_frame(struct wlp *wlp, struct sk_buff *skb,
-			     struct uwb_dev_addr *src)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_frame_assoc *assoc = (void *) skb->data;
-	struct wlp_session *session = wlp->session;
-	u8 version;
-
-	if (wlp_get_version(wlp, &assoc->version, &version,
-			    sizeof(assoc->version)) < 0)
-		goto error;
-	if (version != WLP_VERSION) {
-		dev_err(dev, "Unsupported WLP version in association "
-			"message.\n");
-		goto error;
-	}
-	if (session != NULL) {
-		/* Function that created this session is still holding the
-		 * &wlp->mutex to protect this session. */
-		if (assoc->type == session->exp_message ||
-		    assoc->type == WLP_ASSOC_F0) {
-			if (!memcmp(&session->neighbor_addr, src,
-				   sizeof(*src))) {
-				session->data = skb;
-				(session->cb)(wlp);
-			} else {
-				dev_err(dev, "Received expected message from "
-					"unexpected source.  Expected message "
-					"%d or F0 from %02x:%02x, but received "
-					"it from %02x:%02x. Dropping.\n",
-					session->exp_message,
-					session->neighbor_addr.data[1],
-					session->neighbor_addr.data[0],
-					src->data[1], src->data[0]);
-				goto error;
-			}
-		} else {
-			dev_err(dev, "Association already in progress. "
-				"Dropping.\n");
-			goto error;
-		}
-	} else {
-		wlp_direct_assoc_frame(wlp, skb, src);
-	}
-	return;
-error:
-	kfree_skb(skb);
-}
-
-/*
- * Verify incoming frame is from connected neighbor, prep to pass to WLP client
- *
- * Verification proceeds according to WLP 0.99 [7.3.1]. The source address
- * is used to determine which neighbor is sending the frame and the WSS tag
- * is used to know to which WSS the frame belongs (we only support one WSS
- * so this test is straight forward).
- * With the WSS found we need to ensure that we are connected before
- * allowing the exchange of data frames.
- */
-static
-int wlp_verify_prep_rx_frame(struct wlp *wlp, struct sk_buff *skb,
-			     struct uwb_dev_addr *src)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = -EINVAL;
-	struct wlp_eda_node eda_entry;
-	struct wlp_frame_std_abbrv_hdr *hdr = (void *) skb->data;
-
-	/*verify*/
-	result = wlp_copy_eda_node(&wlp->eda, src, &eda_entry);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Incoming frame is from unknown "
-				"neighbor %02x:%02x.\n", src->data[1],
-				src->data[0]);
-		goto out;
-	}
-	if (hdr->tag != eda_entry.tag) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Tag of incoming frame from "
-				"%02x:%02x does not match expected tag. "
-				"Received 0x%02x, expected 0x%02x. \n",
-				src->data[1], src->data[0], hdr->tag,
-				eda_entry.tag);
-		result = -EINVAL;
-		goto out;
-	}
-	if (eda_entry.state != WLP_WSS_CONNECTED) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Incoming frame from "
-				"%02x:%02x does is not from connected WSS.\n",
-				src->data[1], src->data[0]);
-		result = -EINVAL;
-		goto out;
-	}
-	/*prep*/
-	skb_pull(skb, sizeof(*hdr));
-out:
-	return result;
-}
-
-/*
- * Receive a WLP frame from device
- *
- * @returns: 1 if calling function should free the skb
- *           0 if it successfully handled skb and freed it
- *           0 if error occured, will free skb in this case
- */
-int wlp_receive_frame(struct device *dev, struct wlp *wlp, struct sk_buff *skb,
-		      struct uwb_dev_addr *src)
-{
-	unsigned len = skb->len;
-	void *ptr = skb->data;
-	struct wlp_frame_hdr *hdr;
-	int result = 0;
-
-	if (len < sizeof(*hdr)) {
-		dev_err(dev, "Not enough data to parse WLP header.\n");
-		result = -EINVAL;
-		goto out;
-	}
-	hdr = ptr;
-	if (le16_to_cpu(hdr->mux_hdr) != WLP_PROTOCOL_ID) {
-		dev_err(dev, "Not a WLP frame type.\n");
-		result = -EINVAL;
-		goto out;
-	}
-	switch (hdr->type) {
-	case WLP_FRAME_STANDARD:
-		if (len < sizeof(struct wlp_frame_std_abbrv_hdr)) {
-			dev_err(dev, "Not enough data to parse Standard "
-				"WLP header.\n");
-			goto out;
-		}
-		result = wlp_verify_prep_rx_frame(wlp, skb, src);
-		if (result < 0) {
-			if (printk_ratelimit())
-				dev_err(dev, "WLP: Verification of frame "
-					"from neighbor %02x:%02x failed.\n",
-					src->data[1], src->data[0]);
-			goto out;
-		}
-		result = 1;
-		break;
-	case WLP_FRAME_ABBREVIATED:
-		dev_err(dev, "Abbreviated frame received. FIXME?\n");
-		kfree_skb(skb);
-		break;
-	case WLP_FRAME_CONTROL:
-		dev_err(dev, "Control frame received. FIXME?\n");
-		kfree_skb(skb);
-		break;
-	case WLP_FRAME_ASSOCIATION:
-		if (len < sizeof(struct wlp_frame_assoc)) {
-			dev_err(dev, "Not enough data to parse Association "
-				"WLP header.\n");
-			goto out;
-		}
-		wlp_receive_assoc_frame(wlp, skb, src);
-		break;
-	default:
-		dev_err(dev, "Invalid frame received.\n");
-		result = -EINVAL;
-		break;
-	}
-out:
-	if (result < 0) {
-		kfree_skb(skb);
-		result = 0;
-	}
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_receive_frame);
-
-
-/*
- * Verify frame from network stack, prepare for further transmission
- *
- * @skb:   the socket buffer that needs to be prepared for transmission (it
- *         is in need of a WLP header). If this is a broadcast frame we take
- *         over the entire transmission.
- *         If it is a unicast the WSS connection should already be established
- *         and transmission will be done by the calling function.
- * @dst:   On return this will contain the device address to which the
- *         frame is destined.
- * @returns: 0 on success no tx : WLP header successfully applied to skb buffer,
- *                                calling function can proceed with tx
- *           1 on success with tx : WLP will take over transmission of this
- *                                  frame
- *           <0 on error
- *
- * The network stack (WLP client) is attempting to transmit a frame. We can
- * only transmit data if a local WSS is at least active (connection will be
- * done here if this is a broadcast frame and neighbor also has the WSS
- * active).
- *
- * The frame can be either broadcast or unicast. Broadcast in a WSS is
- * supported via multicast, but we don't support multicast yet (until
- * devices start to support MAB IEs). If a broadcast frame needs to be
- * transmitted it is treated as a unicast frame to each neighbor. In this
- * case the WLP takes over transmission of the skb and returns 1
- * to the caller to indicate so. Also, in this case, if a neighbor has the
- * same WSS activated but is not connected then the WSS connection will be
- * done at this time. The neighbor's virtual address will be learned at
- * this time.
- *
- * The destination address in a unicast frame is the virtual address of the
- * neighbor. This address only becomes known when a WSS connection is
- * established. We thus rely on a broadcast frame to trigger the setup of
- * WSS connections to all neighbors before we are able to send unicast
- * frames to them. This seems reasonable as IP would usually use ARP first
- * before any unicast frames are sent.
- *
- * If we are already connected to the neighbor (neighbor's virtual address
- * is known) we just prepare the WLP header and the caller will continue to
- * send the frame.
- *
- * A failure in this function usually indicates something that cannot be
- * fixed automatically. So, if this function fails (@return < 0) the calling
- * function should not retry to send the frame as it will very likely keep
- * failing.
- *
- */
-int wlp_prepare_tx_frame(struct device *dev, struct wlp *wlp,
-			 struct sk_buff *skb, struct uwb_dev_addr *dst)
-{
-	int result = -EINVAL;
-	struct ethhdr *eth_hdr = (void *) skb->data;
-
-	if (is_multicast_ether_addr(eth_hdr->h_dest)) {
-		result = wlp_eda_for_each(&wlp->eda, wlp_wss_send_copy, skb);
-		if (result < 0) {
-			if (printk_ratelimit())
-				dev_err(dev, "Unable to handle broadcast "
-					"frame from WLP client.\n");
-			goto out;
-		}
-		dev_kfree_skb_irq(skb);
-		result = 1;
-		/* Frame will be transmitted by WLP. */
-	} else {
-		result = wlp_eda_for_virtual(&wlp->eda, eth_hdr->h_dest, dst,
-					     wlp_wss_prep_hdr, skb);
-		if (unlikely(result < 0)) {
-			if (printk_ratelimit())
-				dev_err(dev, "Unable to prepare "
-					"skb for transmission. \n");
-			goto out;
-		}
-	}
-out:
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_prepare_tx_frame);

drivers/uwb/wlp/wlp-internal.h

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- * Internal API
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- */
-
-#ifndef __WLP_INTERNAL_H__
-#define __WLP_INTERNAL_H__
-
-/**
- * State of WSS connection
- *
- * A device needs to connect to a neighbor in an activated WSS before data
- * can be transmitted. The spec also distinguishes between a new connection
- * attempt and a connection attempt after previous connection attempts. The
- * state WLP_WSS_CONNECT_FAILED is used for this scenario. See WLP 0.99
- * [7.2.6]
- */
-enum wlp_wss_connect {
-	WLP_WSS_UNCONNECTED = 0,
-	WLP_WSS_CONNECTED,
-	WLP_WSS_CONNECT_FAILED,
-};
-
-extern struct kobj_type wss_ktype;
-extern struct attribute_group wss_attr_group;
-
-/* This should be changed to a dynamic array where entries are sorted
- * by eth_addr and search is done in a binary form
- *
- * Although thinking twice about it: this technologie's maximum reach
- * is 10 meters...unless you want to pack too much stuff in around
- * your radio controller/WLP device, the list will probably not be
- * too big.
- *
- * In any case, there is probably some data structure in the kernel
- * than we could reused for that already.
- *
- * The below structure is really just good while we support one WSS per
- * host.
- */
-struct wlp_eda_node {
-	struct list_head list_node;
-	unsigned char eth_addr[ETH_ALEN];
-	struct uwb_dev_addr dev_addr;
-	struct wlp_wss *wss;
-	unsigned char virt_addr[ETH_ALEN];
-	u8 tag;
-	enum wlp_wss_connect state;
-};
-
-typedef int (*wlp_eda_for_each_f)(struct wlp *, struct wlp_eda_node *, void *);
-
-extern void wlp_eda_init(struct wlp_eda *);
-extern void wlp_eda_release(struct wlp_eda *);
-extern int wlp_eda_create_node(struct wlp_eda *,
-			       const unsigned char eth_addr[ETH_ALEN],
-			       const struct uwb_dev_addr *);
-extern void wlp_eda_rm_node(struct wlp_eda *, const struct uwb_dev_addr *);
-extern int wlp_eda_update_node(struct wlp_eda *,
-			       const struct uwb_dev_addr *,
-			       struct wlp_wss *,
-			       const unsigned char virt_addr[ETH_ALEN],
-			       const u8, const enum wlp_wss_connect);
-extern int wlp_eda_update_node_state(struct wlp_eda *,
-				     const struct uwb_dev_addr *,
-				     const enum wlp_wss_connect);
-
-extern int wlp_copy_eda_node(struct wlp_eda *, struct uwb_dev_addr *,
-			     struct wlp_eda_node *);
-extern int wlp_eda_for_each(struct wlp_eda *, wlp_eda_for_each_f , void *);
-extern int wlp_eda_for_virtual(struct wlp_eda *,
-			       const unsigned char eth_addr[ETH_ALEN],
-			       struct uwb_dev_addr *,
-			       wlp_eda_for_each_f , void *);
-
-
-extern void wlp_remove_neighbor_tmp_info(struct wlp_neighbor_e *);
-
-extern size_t wlp_wss_key_print(char *, size_t, u8 *);
-
-/* Function called when no more references to WSS exists */
-extern void wlp_wss_release(struct kobject *);
-
-extern void wlp_wss_reset(struct wlp_wss *);
-extern int wlp_wss_create_activate(struct wlp_wss *, struct wlp_uuid *,
-				   char *, unsigned, unsigned);
-extern int wlp_wss_enroll_activate(struct wlp_wss *, struct wlp_uuid *,
-				   struct uwb_dev_addr *);
-extern ssize_t wlp_discover(struct wlp *);
-
-extern int wlp_enroll_neighbor(struct wlp *, struct wlp_neighbor_e *,
-			       struct wlp_wss *, struct wlp_uuid *);
-extern int wlp_wss_is_active(struct wlp *, struct wlp_wss *,
-			     struct uwb_dev_addr *);
-
-struct wlp_assoc_conn_ctx {
-	struct work_struct ws;
-	struct wlp *wlp;
-	struct sk_buff *skb;
-	struct wlp_eda_node eda_entry;
-};
-
-
-extern int wlp_wss_connect_prep(struct wlp *, struct wlp_eda_node *, void *);
-extern int wlp_wss_send_copy(struct wlp *, struct wlp_eda_node *, void *);
-
-
-/* Message handling */
-struct wlp_assoc_frame_ctx {
-	struct work_struct ws;
-	struct wlp *wlp;
-	struct sk_buff *skb;
-	struct uwb_dev_addr src;
-};
-
-extern int wlp_wss_prep_hdr(struct wlp *, struct wlp_eda_node *, void *);
-extern void wlp_handle_d1_frame(struct work_struct *);
-extern int wlp_parse_d2_frame_to_cache(struct wlp *, struct sk_buff *,
-				       struct wlp_neighbor_e *);
-extern int wlp_parse_d2_frame_to_enroll(struct wlp_wss *, struct sk_buff *,
-					struct wlp_neighbor_e *,
-					struct wlp_uuid *);
-extern void wlp_handle_c1_frame(struct work_struct *);
-extern void wlp_handle_c3_frame(struct work_struct *);
-extern int wlp_parse_c3c4_frame(struct wlp *, struct sk_buff *,
-				struct wlp_uuid *, u8 *,
-				struct uwb_mac_addr *);
-extern int wlp_parse_f0(struct wlp *, struct sk_buff *);
-extern int wlp_send_assoc_frame(struct wlp *, struct wlp_wss *,
-				struct uwb_dev_addr *, enum wlp_assoc_type);
-extern ssize_t wlp_get_version(struct wlp *, struct wlp_attr_version *,
-			       u8 *, ssize_t);
-extern ssize_t wlp_get_wssid(struct wlp *, struct wlp_attr_wssid *,
-			     struct wlp_uuid *, ssize_t);
-extern int __wlp_alloc_device_info(struct wlp *);
-extern int __wlp_setup_device_info(struct wlp *);
-
-extern struct wlp_wss_attribute wss_attribute_properties;
-extern struct wlp_wss_attribute wss_attribute_members;
-extern struct wlp_wss_attribute wss_attribute_state;
-
-static inline
-size_t wlp_wss_uuid_print(char *buf, size_t bufsize, struct wlp_uuid *uuid)
-{
-	size_t result;
-
-	result = scnprintf(buf, bufsize,
-			  "%02x:%02x:%02x:%02x:%02x:%02x:"
-			  "%02x:%02x:%02x:%02x:%02x:%02x:"
-			  "%02x:%02x:%02x:%02x",
-			  uuid->data[0], uuid->data[1],
-			  uuid->data[2], uuid->data[3],
-			  uuid->data[4], uuid->data[5],
-			  uuid->data[6], uuid->data[7],
-			  uuid->data[8], uuid->data[9],
-			  uuid->data[10], uuid->data[11],
-			  uuid->data[12], uuid->data[13],
-			  uuid->data[14], uuid->data[15]);
-	return result;
-}
-
-/**
- * FIXME: How should a nonce be displayed?
- */
-static inline
-size_t wlp_wss_nonce_print(char *buf, size_t bufsize, struct wlp_nonce *nonce)
-{
-	size_t result;
-
-	result = scnprintf(buf, bufsize,
-			  "%02x %02x %02x %02x %02x %02x "
-			  "%02x %02x %02x %02x %02x %02x "
-			  "%02x %02x %02x %02x",
-			  nonce->data[0], nonce->data[1],
-			  nonce->data[2], nonce->data[3],
-			  nonce->data[4], nonce->data[5],
-			  nonce->data[6], nonce->data[7],
-			  nonce->data[8], nonce->data[9],
-			  nonce->data[10], nonce->data[11],
-			  nonce->data[12], nonce->data[13],
-			  nonce->data[14], nonce->data[15]);
-	return result;
-}
-
-
-static inline
-void wlp_session_cb(struct wlp *wlp)
-{
-	struct completion *completion = wlp->session->cb_priv;
-	complete(completion);
-}
-
-static inline
-int wlp_uuid_is_set(struct wlp_uuid *uuid)
-{
-	struct wlp_uuid zero_uuid = { .data = { 0x00, 0x00, 0x00, 0x00,
-						0x00, 0x00, 0x00, 0x00,
-						0x00, 0x00, 0x00, 0x00,
-						0x00, 0x00, 0x00, 0x00} };
-
-	if (!memcmp(uuid, &zero_uuid, sizeof(*uuid)))
-		return 0;
-	return 1;
-}
-
-#endif /* __WLP_INTERNAL_H__ */

drivers/uwb/wlp/wlp-lc.c

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- */
-#include <linux/wlp.h>
-#include <linux/slab.h>
-
-#include "wlp-internal.h"
-
-static
-void wlp_neighbor_init(struct wlp_neighbor_e *neighbor)
-{
-	INIT_LIST_HEAD(&neighbor->wssid);
-}
-
-/**
- * Create area for device information storage
- *
- * wlp->mutex must be held
- */
-int __wlp_alloc_device_info(struct wlp *wlp)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	BUG_ON(wlp->dev_info != NULL);
-	wlp->dev_info = kzalloc(sizeof(struct wlp_device_info), GFP_KERNEL);
-	if (wlp->dev_info == NULL) {
-		dev_err(dev, "WLP: Unable to allocate memory for "
-			"device information.\n");
-		return -ENOMEM;
-	}
-	return 0;
-}
-
-
-/**
- * Fill in device information using function provided by driver
- *
- * wlp->mutex must be held
- */
-static
-void __wlp_fill_device_info(struct wlp *wlp)
-{
-	wlp->fill_device_info(wlp, wlp->dev_info);
-}
-
-/**
- * Setup device information
- *
- * Allocate area for device information and populate it.
- *
- * wlp->mutex must be held
- */
-int __wlp_setup_device_info(struct wlp *wlp)
-{
-	int result;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-
-	result = __wlp_alloc_device_info(wlp);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to allocate area for "
-			"device information.\n");
-		return result;
-	}
-	__wlp_fill_device_info(wlp);
-	return 0;
-}
-
-/**
- * Remove information about neighbor stored temporarily
- *
- * Information learned during discovey should only be stored when the
- * device enrolls in the neighbor's WSS. We do need to store this
- * information temporarily in order to present it to the user.
- *
- * We are only interested in keeping neighbor WSS information if that
- * neighbor is accepting enrollment.
- *
- * should be called with wlp->nbmutex held
- */
-void wlp_remove_neighbor_tmp_info(struct wlp_neighbor_e *neighbor)
-{
-	struct wlp_wssid_e *wssid_e, *next;
-	u8 keep;
-	if (!list_empty(&neighbor->wssid)) {
-		list_for_each_entry_safe(wssid_e, next, &neighbor->wssid,
-					 node) {
-			if (wssid_e->info != NULL) {
-				keep = wssid_e->info->accept_enroll;
-				kfree(wssid_e->info);
-				wssid_e->info = NULL;
-				if (!keep) {
-					list_del(&wssid_e->node);
-					kfree(wssid_e);
-				}
-			}
-		}
-	}
-	if (neighbor->info != NULL) {
-		kfree(neighbor->info);
-		neighbor->info = NULL;
-	}
-}
-
-/*
- * Populate WLP neighborhood cache with neighbor information
- *
- * A new neighbor is found. If it is discoverable then we add it to the
- * neighborhood cache.
- *
- */
-static
-int wlp_add_neighbor(struct wlp *wlp, struct uwb_dev *dev)
-{
-	int result = 0;
-	int discoverable;
-	struct wlp_neighbor_e *neighbor;
-
-	/*
-	 * FIXME:
-	 * Use contents of WLP IE found in beacon cache to determine if
-	 * neighbor is discoverable.
-	 * The device does not support WLP IE yet so this still needs to be
-	 * done. Until then we assume all devices are discoverable.
-	 */
-	discoverable = 1; /* will be changed when FIXME disappears */
-	if (discoverable) {
-		/* Add neighbor to cache for discovery */
-		neighbor = kzalloc(sizeof(*neighbor), GFP_KERNEL);
-		if (neighbor == NULL) {
-			dev_err(&dev->dev, "Unable to create memory for "
-				"new neighbor. \n");
-			result = -ENOMEM;
-			goto error_no_mem;
-		}
-		wlp_neighbor_init(neighbor);
-		uwb_dev_get(dev);
-		neighbor->uwb_dev = dev;
-		list_add(&neighbor->node, &wlp->neighbors);
-	}
-error_no_mem:
-	return result;
-}
-
-/**
- * Remove one neighbor from cache
- */
-static
-void __wlp_neighbor_release(struct wlp_neighbor_e *neighbor)
-{
-	struct wlp_wssid_e *wssid_e, *next_wssid_e;
-
-	list_for_each_entry_safe(wssid_e, next_wssid_e,
-				 &neighbor->wssid, node) {
-		list_del(&wssid_e->node);
-		kfree(wssid_e);
-	}
-	uwb_dev_put(neighbor->uwb_dev);
-	list_del(&neighbor->node);
-	kfree(neighbor);
-}
-
-/**
- * Clear entire neighborhood cache.
- */
-static
-void __wlp_neighbors_release(struct wlp *wlp)
-{
-	struct wlp_neighbor_e *neighbor, *next;
-	if (list_empty(&wlp->neighbors))
-		return;
-	list_for_each_entry_safe(neighbor, next, &wlp->neighbors, node) {
-		__wlp_neighbor_release(neighbor);
-	}
-}
-
-static
-void wlp_neighbors_release(struct wlp *wlp)
-{
-	mutex_lock(&wlp->nbmutex);
-	__wlp_neighbors_release(wlp);
-	mutex_unlock(&wlp->nbmutex);
-}
-
-
-
-/**
- * Send D1 message to neighbor, receive D2 message
- *
- * @neighbor: neighbor to which D1 message will be sent
- * @wss:      if not NULL, it is an enrollment request for this WSS
- * @wssid:    if wss not NULL, this is the wssid of the WSS in which we
- *            want to enroll
- *
- * A D1/D2 exchange is done for one of two reasons: discovery or
- * enrollment. If done for discovery the D1 message is sent to the neighbor
- * and the contents of the D2 response is stored in a temporary cache.
- * If done for enrollment the @wss and @wssid are provided also. In this
- * case the D1 message is sent to the neighbor, the D2 response is parsed
- * for enrollment of the WSS with wssid.
- *
- * &wss->mutex is held
- */
-static
-int wlp_d1d2_exchange(struct wlp *wlp, struct wlp_neighbor_e *neighbor,
-		      struct wlp_wss *wss, struct wlp_uuid *wssid)
-{
-	int result;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	DECLARE_COMPLETION_ONSTACK(completion);
-	struct wlp_session session;
-	struct sk_buff  *skb;
-	struct wlp_frame_assoc *resp;
-	struct uwb_dev_addr *dev_addr = &neighbor->uwb_dev->dev_addr;
-
-	mutex_lock(&wlp->mutex);
-	if (!wlp_uuid_is_set(&wlp->uuid)) {
-		dev_err(dev, "WLP: UUID is not set. Set via sysfs to "
-			"proceed.\n");
-		result = -ENXIO;
-		goto out;
-	}
-	/* Send D1 association frame */
-	result = wlp_send_assoc_frame(wlp, wss, dev_addr, WLP_ASSOC_D1);
-	if (result < 0) {
-		dev_err(dev, "Unable to send D1 frame to neighbor "
-			"%02x:%02x (%d)\n", dev_addr->data[1],
-			dev_addr->data[0], result);
-		goto out;
-	}
-	/* Create session, wait for response */
-	session.exp_message = WLP_ASSOC_D2;
-	session.cb = wlp_session_cb;
-	session.cb_priv = &completion;
-	session.neighbor_addr = *dev_addr;
-	BUG_ON(wlp->session != NULL);
-	wlp->session = &session;
-	/* Wait for D2/F0 frame */
-	result = wait_for_completion_interruptible_timeout(&completion,
-						   WLP_PER_MSG_TIMEOUT * HZ);
-	if (result == 0) {
-		result = -ETIMEDOUT;
-		dev_err(dev, "Timeout while sending D1 to neighbor "
-			     "%02x:%02x.\n", dev_addr->data[1],
-			     dev_addr->data[0]);
-		goto error_session;
-	}
-	if (result < 0) {
-		dev_err(dev, "Unable to discover/enroll neighbor %02x:%02x.\n",
-			dev_addr->data[1], dev_addr->data[0]);
-		goto error_session;
-	}
-	/* Parse message in session->data: it will be either D2 or F0 */
-	skb = session.data;
-	resp = (void *) skb->data;
-
-	if (resp->type == WLP_ASSOC_F0) {
-		result = wlp_parse_f0(wlp, skb);
-		if (result < 0)
-			dev_err(dev, "WLP: Unable to parse F0 from neighbor "
-				"%02x:%02x.\n", dev_addr->data[1],
-				dev_addr->data[0]);
-		result = -EINVAL;
-		goto error_resp_parse;
-	}
-	if (wss == NULL) {
-		/* Discovery */
-		result = wlp_parse_d2_frame_to_cache(wlp, skb, neighbor);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to parse D2 message from "
-				"neighbor %02x:%02x for discovery.\n",
-				dev_addr->data[1], dev_addr->data[0]);
-			goto error_resp_parse;
-		}
-	} else {
-		/* Enrollment */
-		result = wlp_parse_d2_frame_to_enroll(wss, skb, neighbor,
-						      wssid);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to parse D2 message from "
-				"neighbor %02x:%02x for enrollment.\n",
-				dev_addr->data[1], dev_addr->data[0]);
-			goto error_resp_parse;
-		}
-	}
-error_resp_parse:
-	kfree_skb(skb);
-error_session:
-	wlp->session = NULL;
-out:
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-
-/**
- * Enroll into WSS of provided WSSID by using neighbor as registrar
- *
- * &wss->mutex is held
- */
-int wlp_enroll_neighbor(struct wlp *wlp, struct wlp_neighbor_e *neighbor,
-			struct wlp_wss *wss, struct wlp_uuid *wssid)
-{
-	int result = 0;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	char buf[WLP_WSS_UUID_STRSIZE];
-	struct uwb_dev_addr *dev_addr = &neighbor->uwb_dev->dev_addr;
-
-	wlp_wss_uuid_print(buf, sizeof(buf), wssid);
-
-	result =  wlp_d1d2_exchange(wlp, neighbor, wss, wssid);
-	if (result < 0) {
-		dev_err(dev, "WLP: D1/D2 message exchange for enrollment "
-			"failed. result = %d \n", result);
-		goto out;
-	}
-	if (wss->state != WLP_WSS_STATE_PART_ENROLLED) {
-		dev_err(dev, "WLP: Unable to enroll into WSS %s using "
-			"neighbor %02x:%02x. \n", buf,
-			dev_addr->data[1], dev_addr->data[0]);
-		result = -EINVAL;
-		goto out;
-	}
-	if (wss->secure_status == WLP_WSS_SECURE) {
-		dev_err(dev, "FIXME: need to complete secure enrollment.\n");
-		result = -EINVAL;
-		goto error;
-	} else {
-		wss->state = WLP_WSS_STATE_ENROLLED;
-		dev_dbg(dev, "WLP: Success Enrollment into unsecure WSS "
-			"%s using neighbor %02x:%02x. \n",
-			buf, dev_addr->data[1], dev_addr->data[0]);
-	}
-out:
-	return result;
-error:
-	wlp_wss_reset(wss);
-	return result;
-}
-
-/**
- * Discover WSS information of neighbor's active WSS
- */
-static
-int wlp_discover_neighbor(struct wlp *wlp,
-			  struct wlp_neighbor_e *neighbor)
-{
-	return wlp_d1d2_exchange(wlp, neighbor, NULL, NULL);
-}
-
-
-/**
- * Each neighbor in the neighborhood cache is discoverable. Discover it.
- *
- * Discovery is done through sending of D1 association frame and parsing
- * the D2 association frame response. Only wssid from D2 will be included
- * in neighbor cache, rest is just displayed to user and forgotten.
- *
- * The discovery is not done in parallel. This is simple and enables us to
- * maintain only one association context.
- *
- * The discovery of one neighbor does not affect the other, but if the
- * discovery of a neighbor fails it is removed from the neighborhood cache.
- */
-static
-int wlp_discover_all_neighbors(struct wlp *wlp)
-{
-	int result = 0;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_neighbor_e *neighbor, *next;
-
-	list_for_each_entry_safe(neighbor, next, &wlp->neighbors, node) {
-		result = wlp_discover_neighbor(wlp, neighbor);
-		if (result < 0) {
-			dev_err(dev, "WLP: Unable to discover neighbor "
-				"%02x:%02x, removing from neighborhood. \n",
-				neighbor->uwb_dev->dev_addr.data[1],
-				neighbor->uwb_dev->dev_addr.data[0]);
-			__wlp_neighbor_release(neighbor);
-		}
-	}
-	return result;
-}
-
-static int wlp_add_neighbor_helper(struct device *dev, void *priv)
-{
-	struct wlp *wlp = priv;
-	struct uwb_dev *uwb_dev = to_uwb_dev(dev);
-
-	return wlp_add_neighbor(wlp, uwb_dev);
-}
-
-/**
- * Discover WLP neighborhood
- *
- * Will send D1 association frame to all devices in beacon group that have
- * discoverable bit set in WLP IE. D2 frames will be received, information
- * displayed to user in @buf. Partial information (from D2 association
- * frame) will be cached to assist with future association
- * requests.
- *
- * The discovery of the WLP neighborhood is triggered by the user. This
- * should occur infrequently and we thus free current cache and re-allocate
- * memory if needed.
- *
- * If one neighbor fails during initial discovery (determining if it is a
- * neighbor or not), we fail all - note that interaction with neighbor has
- * not occured at this point so if a failure occurs we know something went wrong
- * locally. We thus undo everything.
- */
-ssize_t wlp_discover(struct wlp *wlp)
-{
-	int result = 0;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-
-	mutex_lock(&wlp->nbmutex);
-	/* Clear current neighborhood cache. */
-	__wlp_neighbors_release(wlp);
-	/* Determine which devices in neighborhood. Repopulate cache. */
-	result = uwb_dev_for_each(wlp->rc, wlp_add_neighbor_helper, wlp);
-	if (result < 0) {
-		/* May have partial neighbor information, release all. */
-		__wlp_neighbors_release(wlp);
-		goto error_dev_for_each;
-	}
-	/* Discover the properties of devices in neighborhood. */
-	result = wlp_discover_all_neighbors(wlp);
-	/* In case of failure we still print our partial results. */
-	if (result < 0) {
-		dev_err(dev, "Unable to fully discover neighborhood. \n");
-		result = 0;
-	}
-error_dev_for_each:
-	mutex_unlock(&wlp->nbmutex);
-	return result;
-}
-
-/**
- * Handle events from UWB stack
- *
- * We handle events conservatively. If a neighbor goes off the air we
- * remove it from the neighborhood. If an association process is in
- * progress this function will block waiting for the nbmutex to become
- * free. The association process will thus be allowed to complete before it
- * is removed.
- */
-static
-void wlp_uwb_notifs_cb(void *_wlp, struct uwb_dev *uwb_dev,
-		       enum uwb_notifs event)
-{
-	struct wlp *wlp = _wlp;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_neighbor_e *neighbor, *next;
-	int result;
-	switch (event) {
-	case UWB_NOTIF_ONAIR:
-		result = wlp_eda_create_node(&wlp->eda,
-					     uwb_dev->mac_addr.data,
-					     &uwb_dev->dev_addr);
-		if (result < 0)
-			dev_err(dev, "WLP: Unable to add new neighbor "
-				"%02x:%02x to EDA cache.\n",
-				uwb_dev->dev_addr.data[1],
-				uwb_dev->dev_addr.data[0]);
-		break;
-	case UWB_NOTIF_OFFAIR:
-		wlp_eda_rm_node(&wlp->eda, &uwb_dev->dev_addr);
-		mutex_lock(&wlp->nbmutex);
-		list_for_each_entry_safe(neighbor, next, &wlp->neighbors, node) {
-			if (neighbor->uwb_dev == uwb_dev)
-				__wlp_neighbor_release(neighbor);
-		}
-		mutex_unlock(&wlp->nbmutex);
-		break;
-	default:
-		dev_err(dev, "don't know how to handle event %d from uwb\n",
-				event);
-	}
-}
-
-static void wlp_channel_changed(struct uwb_pal *pal, int channel)
-{
-	struct wlp *wlp = container_of(pal, struct wlp, pal);
-
-	if (channel < 0)
-		netif_carrier_off(wlp->ndev);
-	else
-		netif_carrier_on(wlp->ndev);
-}
-
-int wlp_setup(struct wlp *wlp, struct uwb_rc *rc, struct net_device *ndev)
-{
-	int result;
-
-	BUG_ON(wlp->fill_device_info == NULL);
-	BUG_ON(wlp->xmit_frame == NULL);
-	BUG_ON(wlp->stop_queue == NULL);
-	BUG_ON(wlp->start_queue == NULL);
-
-	wlp->rc = rc;
-	wlp->ndev = ndev;
-	wlp_eda_init(&wlp->eda);/* Set up address cache */
-	wlp->uwb_notifs_handler.cb = wlp_uwb_notifs_cb;
-	wlp->uwb_notifs_handler.data = wlp;
-	uwb_notifs_register(rc, &wlp->uwb_notifs_handler);
-
-	uwb_pal_init(&wlp->pal);
-	wlp->pal.rc = rc;
-	wlp->pal.channel_changed = wlp_channel_changed;
-	result = uwb_pal_register(&wlp->pal);
-	if (result < 0)
-		uwb_notifs_deregister(wlp->rc, &wlp->uwb_notifs_handler);
-
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_setup);
-
-void wlp_remove(struct wlp *wlp)
-{
-	wlp_neighbors_release(wlp);
-	uwb_pal_unregister(&wlp->pal);
-	uwb_notifs_deregister(wlp->rc, &wlp->uwb_notifs_handler);
-	wlp_eda_release(&wlp->eda);
-	mutex_lock(&wlp->mutex);
-	if (wlp->dev_info != NULL)
-		kfree(wlp->dev_info);
-	mutex_unlock(&wlp->mutex);
-	wlp->rc = NULL;
-}
-EXPORT_SYMBOL_GPL(wlp_remove);
-
-/**
- * wlp_reset_all - reset the WLP hardware
- * @wlp: the WLP device to reset.
- *
- * This schedules a full hardware reset of the WLP device.  The radio
- * controller and any other PALs will also be reset.
- */
-void wlp_reset_all(struct wlp *wlp)
-{
-	uwb_rc_reset_all(wlp->rc);
-}
-EXPORT_SYMBOL_GPL(wlp_reset_all);

drivers/uwb/wlp/wss-lc.c

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- *
- * Copyright (C) 2007 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * Implementation of the WLP association protocol.
- *
- * FIXME: Docs
- *
- * A UWB network interface will configure a WSS through wlp_wss_setup() after
- * the interface has been assigned a MAC address, typically after
- * "ifconfig" has been called. When the interface goes down it should call
- * wlp_wss_remove().
- *
- * When the WSS is ready for use the user interacts via sysfs to create,
- * discover, and activate WSS.
- *
- * wlp_wss_enroll_activate()
- *
- * wlp_wss_create_activate()
- * 	wlp_wss_set_wssid_hash()
- * 		wlp_wss_comp_wssid_hash()
- * 	wlp_wss_sel_bcast_addr()
- * 	wlp_wss_sysfs_add()
- *
- * Called when no more references to WSS exist:
- * 	wlp_wss_release()
- * 		wlp_wss_reset()
- */
-#include <linux/etherdevice.h> /* for is_valid_ether_addr */
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/wlp.h>
-
-#include "wlp-internal.h"
-
-size_t wlp_wss_key_print(char *buf, size_t bufsize, u8 *key)
-{
-	size_t result;
-
-	result = scnprintf(buf, bufsize,
-			  "%02x %02x %02x %02x %02x %02x "
-			  "%02x %02x %02x %02x %02x %02x "
-			  "%02x %02x %02x %02x",
-			  key[0], key[1], key[2], key[3],
-			  key[4], key[5], key[6], key[7],
-			  key[8], key[9], key[10], key[11],
-			  key[12], key[13], key[14], key[15]);
-	return result;
-}
-
-/**
- * Compute WSSID hash
- * WLP Draft 0.99 [7.2.1]
- *
- * The WSSID hash for a WSSID is the result of an octet-wise exclusive-OR
- * of all octets in the WSSID.
- */
-static
-u8 wlp_wss_comp_wssid_hash(struct wlp_uuid *wssid)
-{
-	return wssid->data[0]  ^ wssid->data[1]  ^ wssid->data[2]
-	       ^ wssid->data[3]  ^ wssid->data[4]  ^ wssid->data[5]
-	       ^ wssid->data[6]  ^ wssid->data[7]  ^ wssid->data[8]
-	       ^ wssid->data[9]  ^ wssid->data[10] ^ wssid->data[11]
-	       ^ wssid->data[12] ^ wssid->data[13] ^ wssid->data[14]
-	       ^ wssid->data[15];
-}
-
-/**
- * Select a multicast EUI-48 for the WSS broadcast address.
- * WLP Draft 0.99 [7.2.1]
- *
- * Selected based on the WiMedia Alliance OUI, 00-13-88, within the WLP
- * range, [01-13-88-00-01-00, 01-13-88-00-01-FF] inclusive.
- *
- * This address is currently hardcoded.
- * FIXME?
- */
-static
-struct uwb_mac_addr wlp_wss_sel_bcast_addr(struct wlp_wss *wss)
-{
-	struct uwb_mac_addr bcast = {
-		.data = { 0x01, 0x13, 0x88, 0x00, 0x01, 0x00 }
-	};
-	return bcast;
-}
-
-/**
- * Clear the contents of the WSS structure - all except kobj, mutex, virtual
- *
- * We do not want to reinitialize - the internal kobj should not change as
- * it still points to the parent received during setup. The mutex should
- * remain also. We thus just reset values individually.
- * The virutal address assigned to WSS will remain the same for the
- * lifetime of the WSS. We only reset the fields that can change during its
- * lifetime.
- */
-void wlp_wss_reset(struct wlp_wss *wss)
-{
-	memset(&wss->wssid, 0, sizeof(wss->wssid));
-	wss->hash = 0;
-	memset(&wss->name[0], 0, sizeof(wss->name));
-	memset(&wss->bcast, 0, sizeof(wss->bcast));
-	wss->secure_status = WLP_WSS_UNSECURE;
-	memset(&wss->master_key[0], 0, sizeof(wss->master_key));
-	wss->tag = 0;
-	wss->state = WLP_WSS_STATE_NONE;
-}
-
-/**
- * Create sysfs infrastructure for WSS
- *
- * The WSS is configured to have the interface as parent (see wlp_wss_setup())
- * a new sysfs directory that includes wssid as its name is created in the
- * interface's sysfs directory. The group of files interacting with WSS are
- * created also.
- */
-static
-int wlp_wss_sysfs_add(struct wlp_wss *wss, char *wssid_str)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result;
-
-	result = kobject_set_name(&wss->kobj, "wss-%s", wssid_str);
-	if (result < 0)
-		return result;
-	wss->kobj.ktype = &wss_ktype;
-	result = kobject_init_and_add(&wss->kobj,
-			&wss_ktype, wss->kobj.parent, "wlp");
-	if (result < 0) {
-		dev_err(dev, "WLP: Cannot register WSS kobject.\n");
-		goto error_kobject_register;
-	}
-	result = sysfs_create_group(&wss->kobj, &wss_attr_group);
-	if (result < 0) {
-		dev_err(dev, "WLP: Cannot register WSS attributes: %d\n",
-			result);
-		goto error_sysfs_create_group;
-	}
-	return 0;
-error_sysfs_create_group:
-
-	kobject_put(&wss->kobj); /* will free name if needed */
-	return result;
-error_kobject_register:
-	kfree(wss->kobj.name);
-	wss->kobj.name = NULL;
-	wss->kobj.ktype = NULL;
-	return result;
-}
-
-
-/**
- * Release WSS
- *
- * No more references exist to this WSS. We should undo everything that was
- * done in wlp_wss_create_activate() except removing the group. The group
- * is not removed because an object can be unregistered before the group is
- * created. We also undo any additional operations on the WSS after this
- * (addition of members).
- *
- * If memory was allocated for the kobject's name then it will
- * be freed by the kobject system during this time.
- *
- * The EDA cache is removed and reinitialized when the WSS is removed. We
- * thus loose knowledge of members of this WSS at that time and need not do
- * it here.
- */
-void wlp_wss_release(struct kobject *kobj)
-{
-	struct wlp_wss *wss = container_of(kobj, struct wlp_wss, kobj);
-
-	wlp_wss_reset(wss);
-}
-
-/**
- * Enroll into a WSS using provided neighbor as registrar
- *
- * First search the neighborhood information to learn which neighbor is
- * referred to, next proceed with enrollment.
- *
- * &wss->mutex is held
- */
-static
-int wlp_wss_enroll_target(struct wlp_wss *wss, struct wlp_uuid *wssid,
-			  struct uwb_dev_addr *dest)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_neighbor_e *neighbor;
-	int result = -ENXIO;
-	struct uwb_dev_addr *dev_addr;
-
-	mutex_lock(&wlp->nbmutex);
-	list_for_each_entry(neighbor, &wlp->neighbors, node) {
-		dev_addr = &neighbor->uwb_dev->dev_addr;
-		if (!memcmp(dest, dev_addr, sizeof(*dest))) {
-			result = wlp_enroll_neighbor(wlp, neighbor, wss, wssid);
-			break;
-		}
-	}
-	if (result == -ENXIO)
-		dev_err(dev, "WLP: Cannot find neighbor %02x:%02x. \n",
-			dest->data[1], dest->data[0]);
-	mutex_unlock(&wlp->nbmutex);
-	return result;
-}
-
-/**
- * Enroll into a WSS previously discovered
- *
- * User provides WSSID of WSS, search for neighbor that has this WSS
- * activated and attempt to enroll.
- *
- * &wss->mutex is held
- */
-static
-int wlp_wss_enroll_discovered(struct wlp_wss *wss, struct wlp_uuid *wssid)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_neighbor_e *neighbor;
-	struct wlp_wssid_e *wssid_e;
-	char buf[WLP_WSS_UUID_STRSIZE];
-	int result = -ENXIO;
-
-
-	mutex_lock(&wlp->nbmutex);
-	list_for_each_entry(neighbor, &wlp->neighbors, node) {
-		list_for_each_entry(wssid_e, &neighbor->wssid, node) {
-			if (!memcmp(wssid, &wssid_e->wssid, sizeof(*wssid))) {
-				result = wlp_enroll_neighbor(wlp, neighbor,
-							     wss, wssid);
-				if (result == 0) /* enrollment success */
-					goto out;
-				break;
-			}
-		}
-	}
-out:
-	if (result == -ENXIO) {
-		wlp_wss_uuid_print(buf, sizeof(buf), wssid);
-		dev_err(dev, "WLP: Cannot find WSSID %s in cache. \n", buf);
-	}
-	mutex_unlock(&wlp->nbmutex);
-	return result;
-}
-
-/**
- * Enroll into WSS with provided WSSID, registrar may be provided
- *
- * @wss: out WSS that will be enrolled
- * @wssid: wssid of neighboring WSS that we want to enroll in
- * @devaddr: registrar can be specified, will be broadcast (ff:ff) if any
- *           neighbor can be used as registrar.
- *
- * &wss->mutex is held
- */
-static
-int wlp_wss_enroll(struct wlp_wss *wss, struct wlp_uuid *wssid,
-		   struct uwb_dev_addr *devaddr)
-{
-	int result;
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	char buf[WLP_WSS_UUID_STRSIZE];
-	struct uwb_dev_addr bcast = {.data = {0xff, 0xff} };
-
-	wlp_wss_uuid_print(buf, sizeof(buf), wssid);
-
-	if (wss->state != WLP_WSS_STATE_NONE) {
-		dev_err(dev, "WLP: Already enrolled in WSS %s.\n", buf);
-		result = -EEXIST;
-		goto error;
-	}
-	if (!memcmp(&bcast, devaddr, sizeof(bcast)))
-		result = wlp_wss_enroll_discovered(wss, wssid);
-	else
-		result = wlp_wss_enroll_target(wss, wssid, devaddr);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to enroll into WSS %s, result %d \n",
-			buf, result);
-		goto error;
-	}
-	dev_dbg(dev, "Successfully enrolled into WSS %s \n", buf);
-	result = wlp_wss_sysfs_add(wss, buf);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to set up sysfs for WSS kobject.\n");
-		wlp_wss_reset(wss);
-	}
-error:
-	return result;
-
-}
-
-/**
- * Activate given WSS
- *
- * Prior to activation a WSS must be enrolled. To activate a WSS a device
- * includes the WSS hash in the WLP IE in its beacon in each superframe.
- * WLP 0.99 [7.2.5].
- *
- * The WSS tag is also computed at this time. We only support one activated
- * WSS so we can use the hash as a tag - there will never be a conflict.
- *
- * We currently only support one activated WSS so only one WSS hash is
- * included in the WLP IE.
- */
-static
-int wlp_wss_activate(struct wlp_wss *wss)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct uwb_rc *uwb_rc = wlp->rc;
-	int result;
-	struct {
-		struct wlp_ie wlp_ie;
-		u8 hash; /* only include one hash */
-	} ie_data;
-
-	BUG_ON(wss->state != WLP_WSS_STATE_ENROLLED);
-	wss->hash = wlp_wss_comp_wssid_hash(&wss->wssid);
-	wss->tag = wss->hash;
-	memset(&ie_data, 0, sizeof(ie_data));
-	ie_data.wlp_ie.hdr.element_id = UWB_IE_WLP;
-	ie_data.wlp_ie.hdr.length = sizeof(ie_data) - sizeof(struct uwb_ie_hdr);
-	wlp_ie_set_hash_length(&ie_data.wlp_ie, sizeof(ie_data.hash));
-	ie_data.hash = wss->hash;
-	result = uwb_rc_ie_add(uwb_rc, &ie_data.wlp_ie.hdr,
-			       sizeof(ie_data));
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to add WLP IE to beacon. "
-			"result = %d.\n", result);
-		goto error_wlp_ie;
-	}
-	wss->state = WLP_WSS_STATE_ACTIVE;
-	result = 0;
-error_wlp_ie:
-	return result;
-}
-
-/**
- * Enroll in and activate WSS identified by provided WSSID
- *
- * The neighborhood cache should contain a list of all neighbors and the
- * WSS they have activated. Based on that cache we search which neighbor we
- * can perform the association process with. The user also has option to
- * specify which neighbor it prefers as registrar.
- * Successful enrollment is followed by activation.
- * Successful activation will create the sysfs directory containing
- * specific information regarding this WSS.
- */
-int wlp_wss_enroll_activate(struct wlp_wss *wss, struct wlp_uuid *wssid,
-			    struct uwb_dev_addr *devaddr)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-	char buf[WLP_WSS_UUID_STRSIZE];
-
-	mutex_lock(&wss->mutex);
-	result = wlp_wss_enroll(wss, wssid, devaddr);
-	if (result < 0) {
-		wlp_wss_uuid_print(buf, sizeof(buf), &wss->wssid);
-		dev_err(dev, "WLP: Enrollment into WSS %s failed.\n", buf);
-		goto error_enroll;
-	}
-	result = wlp_wss_activate(wss);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to activate WSS. Undoing enrollment "
-			"result = %d \n", result);
-		/* Undo enrollment */
-		wlp_wss_reset(wss);
-		goto error_activate;
-	}
-error_activate:
-error_enroll:
-	mutex_unlock(&wss->mutex);
-	return result;
-}
-
-/**
- * Create, enroll, and activate a new WSS
- *
- * @wssid: new wssid provided by user
- * @name:  WSS name requested by used.
- * @sec_status: security status requested by user
- *
- * A user requested the creation of a new WSS. All operations are done
- * locally. The new WSS will be stored locally, the hash will be included
- * in the WLP IE, and the sysfs infrastructure for this WSS will be
- * created.
- */
-int wlp_wss_create_activate(struct wlp_wss *wss, struct wlp_uuid *wssid,
-			    char *name, unsigned sec_status, unsigned accept)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-	char buf[WLP_WSS_UUID_STRSIZE];
-
-	result = wlp_wss_uuid_print(buf, sizeof(buf), wssid);
-
-	if (!mutex_trylock(&wss->mutex)) {
-		dev_err(dev, "WLP: WLP association session in progress.\n");
-		return -EBUSY;
-	}
-	if (wss->state != WLP_WSS_STATE_NONE) {
-		dev_err(dev, "WLP: WSS already exists. Not creating new.\n");
-		result = -EEXIST;
-		goto out;
-	}
-	if (wss->kobj.parent == NULL) {
-		dev_err(dev, "WLP: WSS parent not ready. Is network interface "
-		       "up?\n");
-		result = -ENXIO;
-		goto out;
-	}
-	if (sec_status == WLP_WSS_SECURE) {
-		dev_err(dev, "WLP: FIXME Creation of secure WSS not "
-			"supported yet.\n");
-		result = -EINVAL;
-		goto out;
-	}
-	wss->wssid = *wssid;
-	memcpy(wss->name, name, sizeof(wss->name));
-	wss->bcast = wlp_wss_sel_bcast_addr(wss);
-	wss->secure_status = sec_status;
-	wss->accept_enroll = accept;
-	/*wss->virtual_addr is initialized in call to wlp_wss_setup*/
-	/* sysfs infrastructure */
-	result = wlp_wss_sysfs_add(wss, buf);
-	if (result < 0) {
-		dev_err(dev, "Cannot set up sysfs for WSS kobject.\n");
-		wlp_wss_reset(wss);
-		goto out;
-	} else
-		result = 0;
-	wss->state = WLP_WSS_STATE_ENROLLED;
-	result = wlp_wss_activate(wss);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to activate WSS. Undoing "
-			"enrollment\n");
-		wlp_wss_reset(wss);
-		goto out;
-	}
-	result = 0;
-out:
-	mutex_unlock(&wss->mutex);
-	return result;
-}
-
-/**
- * Determine if neighbor has WSS activated
- *
- * @returns: 1 if neighbor has WSS activated, zero otherwise
- *
- * This can be done in two ways:
- * - send a C1 frame, parse C2/F0 response
- * - examine the WLP IE sent by the neighbor
- *
- * The WLP IE is not fully supported in hardware so we use the C1/C2 frame
- * exchange to determine if a WSS is activated. Using the WLP IE should be
- * faster and should be used when it becomes possible.
- */
-int wlp_wss_is_active(struct wlp *wlp, struct wlp_wss *wss,
-		      struct uwb_dev_addr *dev_addr)
-{
-	int result = 0;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	DECLARE_COMPLETION_ONSTACK(completion);
-	struct wlp_session session;
-	struct sk_buff  *skb;
-	struct wlp_frame_assoc *resp;
-	struct wlp_uuid wssid;
-
-	mutex_lock(&wlp->mutex);
-	/* Send C1 association frame */
-	result = wlp_send_assoc_frame(wlp, wss, dev_addr, WLP_ASSOC_C1);
-	if (result < 0) {
-		dev_err(dev, "Unable to send C1 frame to neighbor "
-			"%02x:%02x (%d)\n", dev_addr->data[1],
-			dev_addr->data[0], result);
-		result = 0;
-		goto out;
-	}
-	/* Create session, wait for response */
-	session.exp_message = WLP_ASSOC_C2;
-	session.cb = wlp_session_cb;
-	session.cb_priv = &completion;
-	session.neighbor_addr = *dev_addr;
-	BUG_ON(wlp->session != NULL);
-	wlp->session = &session;
-	/* Wait for C2/F0 frame */
-	result = wait_for_completion_interruptible_timeout(&completion,
-						   WLP_PER_MSG_TIMEOUT * HZ);
-	if (result == 0) {
-		dev_err(dev, "Timeout while sending C1 to neighbor "
-			     "%02x:%02x.\n", dev_addr->data[1],
-			     dev_addr->data[0]);
-		goto out;
-	}
-	if (result < 0) {
-		dev_err(dev, "Unable to send C1 to neighbor %02x:%02x.\n",
-			dev_addr->data[1], dev_addr->data[0]);
-		result = 0;
-		goto out;
-	}
-	/* Parse message in session->data: it will be either C2 or F0 */
-	skb = session.data;
-	resp = (void *) skb->data;
-	if (resp->type == WLP_ASSOC_F0) {
-		result = wlp_parse_f0(wlp, skb);
-		if (result < 0)
-			dev_err(dev, "WLP:  unable to parse incoming F0 "
-				"frame from neighbor %02x:%02x.\n",
-				dev_addr->data[1], dev_addr->data[0]);
-		result = 0;
-		goto error_resp_parse;
-	}
-	/* WLP version and message type fields have already been parsed */
-	result = wlp_get_wssid(wlp, (void *)resp + sizeof(*resp), &wssid,
-			       skb->len - sizeof(*resp));
-	if (result < 0) {
-		dev_err(dev, "WLP: unable to obtain WSSID from C2 frame.\n");
-		result = 0;
-		goto error_resp_parse;
-	}
-	if (!memcmp(&wssid, &wss->wssid, sizeof(wssid)))
-		result = 1;
-	else {
-		dev_err(dev, "WLP: Received a C2 frame without matching "
-			"WSSID.\n");
-		result = 0;
-	}
-error_resp_parse:
-	kfree_skb(skb);
-out:
-	wlp->session = NULL;
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-
-/**
- * Activate connection with neighbor by updating EDA cache
- *
- * @wss:       local WSS to which neighbor wants to connect
- * @dev_addr:  neighbor's address
- * @wssid:     neighbor's WSSID - must be same as our WSS's WSSID
- * @tag:       neighbor's WSS tag used to identify frames transmitted by it
- * @virt_addr: neighbor's virtual EUI-48
- */
-static
-int wlp_wss_activate_connection(struct wlp *wlp, struct wlp_wss *wss,
-				struct uwb_dev_addr *dev_addr,
-				struct wlp_uuid *wssid, u8 *tag,
-				struct uwb_mac_addr *virt_addr)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-
-	if (!memcmp(wssid, &wss->wssid, sizeof(*wssid))) {
-		/* Update EDA cache */
-		result = wlp_eda_update_node(&wlp->eda, dev_addr, wss,
-					     (void *) virt_addr->data, *tag,
-					     WLP_WSS_CONNECTED);
-		if (result < 0)
-			dev_err(dev, "WLP: Unable to update EDA cache "
-				"with new connected neighbor information.\n");
-	} else {
-		dev_err(dev, "WLP: Neighbor does not have matching WSSID.\n");
-		result = -EINVAL;
-	}
-	return result;
-}
-
-/**
- * Connect to WSS neighbor
- *
- * Use C3/C4 exchange to determine if neighbor has WSS activated and
- * retrieve the WSS tag and virtual EUI-48 of the neighbor.
- */
-static
-int wlp_wss_connect_neighbor(struct wlp *wlp, struct wlp_wss *wss,
-			     struct uwb_dev_addr *dev_addr)
-{
-	int result;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct wlp_uuid wssid;
-	u8 tag;
-	struct uwb_mac_addr virt_addr;
-	DECLARE_COMPLETION_ONSTACK(completion);
-	struct wlp_session session;
-	struct wlp_frame_assoc *resp;
-	struct sk_buff *skb;
-
-	mutex_lock(&wlp->mutex);
-	/* Send C3 association frame */
-	result = wlp_send_assoc_frame(wlp, wss, dev_addr, WLP_ASSOC_C3);
-	if (result < 0) {
-		dev_err(dev, "Unable to send C3 frame to neighbor "
-			"%02x:%02x (%d)\n", dev_addr->data[1],
-			dev_addr->data[0], result);
-		goto out;
-	}
-	/* Create session, wait for response */
-	session.exp_message = WLP_ASSOC_C4;
-	session.cb = wlp_session_cb;
-	session.cb_priv = &completion;
-	session.neighbor_addr = *dev_addr;
-	BUG_ON(wlp->session != NULL);
-	wlp->session = &session;
-	/* Wait for C4/F0 frame */
-	result = wait_for_completion_interruptible_timeout(&completion,
-						   WLP_PER_MSG_TIMEOUT * HZ);
-	if (result == 0) {
-		dev_err(dev, "Timeout while sending C3 to neighbor "
-			     "%02x:%02x.\n", dev_addr->data[1],
-			     dev_addr->data[0]);
-		result = -ETIMEDOUT;
-		goto out;
-	}
-	if (result < 0) {
-		dev_err(dev, "Unable to send C3 to neighbor %02x:%02x.\n",
-			dev_addr->data[1], dev_addr->data[0]);
-		goto out;
-	}
-	/* Parse message in session->data: it will be either C4 or F0 */
-	skb = session.data;
-	resp = (void *) skb->data;
-	if (resp->type == WLP_ASSOC_F0) {
-		result = wlp_parse_f0(wlp, skb);
-		if (result < 0)
-			dev_err(dev, "WLP: unable to parse incoming F0 "
-				"frame from neighbor %02x:%02x.\n",
-				dev_addr->data[1], dev_addr->data[0]);
-		result = -EINVAL;
-		goto error_resp_parse;
-	}
-	result = wlp_parse_c3c4_frame(wlp, skb, &wssid, &tag, &virt_addr);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to parse C4 frame from neighbor.\n");
-		goto error_resp_parse;
-	}
-	result = wlp_wss_activate_connection(wlp, wss, dev_addr, &wssid, &tag,
-					     &virt_addr);
-	if (result < 0) {
-		dev_err(dev, "WLP: Unable to activate connection to "
-			"neighbor %02x:%02x.\n", dev_addr->data[1],
-			dev_addr->data[0]);
-		goto error_resp_parse;
-	}
-error_resp_parse:
-	kfree_skb(skb);
-out:
-	/* Record that we unsuccessfully tried to connect to this neighbor */
-	if (result < 0)
-		wlp_eda_update_node_state(&wlp->eda, dev_addr,
-					  WLP_WSS_CONNECT_FAILED);
-	wlp->session = NULL;
-	mutex_unlock(&wlp->mutex);
-	return result;
-}
-
-/**
- * Connect to neighbor with common WSS, send pending frame
- *
- * This function is scheduled when a frame is destined to a neighbor with
- * which we do not have a connection. A copy of the EDA cache entry is
- * provided - not the actual cache entry (because it is protected by a
- * spinlock).
- *
- * First determine if neighbor has the same WSS activated, connect if it
- * does. The C3/C4 exchange is dual purpose to determine if neighbor has
- * WSS activated and proceed with the connection.
- *
- * The frame that triggered the connection setup is sent after connection
- * setup.
- *
- * network queue is stopped - we need to restart when done
- *
- */
-static
-void wlp_wss_connect_send(struct work_struct *ws)
-{
-	struct wlp_assoc_conn_ctx *conn_ctx = container_of(ws,
-						  struct wlp_assoc_conn_ctx,
-						  ws);
-	struct wlp *wlp = conn_ctx->wlp;
-	struct sk_buff *skb = conn_ctx->skb;
-	struct wlp_eda_node *eda_entry = &conn_ctx->eda_entry;
-	struct uwb_dev_addr *dev_addr = &eda_entry->dev_addr;
-	struct wlp_wss *wss = &wlp->wss;
-	int result;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-
-	mutex_lock(&wss->mutex);
-	if (wss->state < WLP_WSS_STATE_ACTIVE) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Attempting to connect with "
-				"WSS that is not active or connected.\n");
-		dev_kfree_skb(skb);
-		goto out;
-	}
-	/* Establish connection - send C3 rcv C4 */
-	result = wlp_wss_connect_neighbor(wlp, wss, dev_addr);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Unable to establish connection "
-				"with neighbor %02x:%02x.\n",
-				dev_addr->data[1], dev_addr->data[0]);
-		dev_kfree_skb(skb);
-		goto out;
-	}
-	/* EDA entry changed, update the local copy being used */
-	result = wlp_copy_eda_node(&wlp->eda, dev_addr, eda_entry);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Cannot find EDA entry for "
-				"neighbor %02x:%02x \n",
-				dev_addr->data[1], dev_addr->data[0]);
-	}
-	result = wlp_wss_prep_hdr(wlp, eda_entry, skb);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Unable to prepare frame header for "
-				"transmission (neighbor %02x:%02x). \n",
-				dev_addr->data[1], dev_addr->data[0]);
-		dev_kfree_skb(skb);
-		goto out;
-	}
-	BUG_ON(wlp->xmit_frame == NULL);
-	result = wlp->xmit_frame(wlp, skb, dev_addr);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Unable to transmit frame: %d\n",
-				result);
-		if (result == -ENXIO)
-			dev_err(dev, "WLP: Is network interface up? \n");
-		/* We could try again ... */
-		dev_kfree_skb(skb);/*we need to free if tx fails */
-	}
-out:
-	kfree(conn_ctx);
-	BUG_ON(wlp->start_queue == NULL);
-	wlp->start_queue(wlp);
-	mutex_unlock(&wss->mutex);
-}
-
-/**
- * Add WLP header to outgoing skb
- *
- * @eda_entry: pointer to neighbor's entry in the EDA cache
- * @_skb:      skb containing data destined to the neighbor
- */
-int wlp_wss_prep_hdr(struct wlp *wlp, struct wlp_eda_node *eda_entry,
-		     void *_skb)
-{
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-	unsigned char *eth_addr = eda_entry->eth_addr;
-	struct uwb_dev_addr *dev_addr = &eda_entry->dev_addr;
-	struct sk_buff *skb = _skb;
-	struct wlp_frame_std_abbrv_hdr *std_hdr;
-
-	if (eda_entry->state == WLP_WSS_CONNECTED) {
-		/* Add WLP header */
-		BUG_ON(skb_headroom(skb) < sizeof(*std_hdr));
-		std_hdr = (void *) __skb_push(skb, sizeof(*std_hdr));
-		std_hdr->hdr.mux_hdr = cpu_to_le16(WLP_PROTOCOL_ID);
-		std_hdr->hdr.type = WLP_FRAME_STANDARD;
-		std_hdr->tag = eda_entry->wss->tag;
-	} else {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Destination neighbor (Ethernet: "
-				"%pM, Dev: %02x:%02x) is not connected.\n",
-				eth_addr, dev_addr->data[1], dev_addr->data[0]);
-		result = -EINVAL;
-	}
-	return result;
-}
-
-
-/**
- * Prepare skb for neighbor: connect if not already and prep WLP header
- *
- * This function is called in interrupt context, but it needs to sleep. We
- * temporarily stop the net queue to establish the WLP connection.
- * Setup of the WLP connection and restart of queue is scheduled
- * on the default work queue.
- *
- * run with eda->lock held (spinlock)
- */
-int wlp_wss_connect_prep(struct wlp *wlp, struct wlp_eda_node *eda_entry,
-			 void *_skb)
-{
-	int result = 0;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct sk_buff *skb = _skb;
-	struct wlp_assoc_conn_ctx *conn_ctx;
-
-	if (eda_entry->state == WLP_WSS_UNCONNECTED) {
-		/* We don't want any more packets while we set up connection */
-		BUG_ON(wlp->stop_queue == NULL);
-		wlp->stop_queue(wlp);
-		conn_ctx = kmalloc(sizeof(*conn_ctx), GFP_ATOMIC);
-		if (conn_ctx == NULL) {
-			if (printk_ratelimit())
-				dev_err(dev, "WLP: Unable to allocate memory "
-					"for connection handling.\n");
-			result = -ENOMEM;
-			goto out;
-		}
-		conn_ctx->wlp = wlp;
-		conn_ctx->skb = skb;
-		conn_ctx->eda_entry = *eda_entry;
-		INIT_WORK(&conn_ctx->ws, wlp_wss_connect_send);
-		schedule_work(&conn_ctx->ws);
-		result = 1;
-	} else if (eda_entry->state == WLP_WSS_CONNECT_FAILED) {
-		/* Previous connection attempts failed, don't retry - see
-		 * conditions for connection in WLP 0.99 [7.6.2] */
-		if (printk_ratelimit())
-			dev_err(dev, "Could not connect to neighbor "
-			 "previously. Not retrying. \n");
-		result = -ENONET;
-		goto out;
-	} else /* eda_entry->state == WLP_WSS_CONNECTED */
-		result = wlp_wss_prep_hdr(wlp, eda_entry, skb);
-out:
-	return result;
-}
-
-/**
- * Emulate broadcast: copy skb, send copy to neighbor (connect if not already)
- *
- * We need to copy skbs in the case where we emulate broadcast through
- * unicast. We copy instead of clone because we are modifying the data of
- * the frame after copying ... clones share data so we cannot emulate
- * broadcast using clones.
- *
- * run with eda->lock held (spinlock)
- */
-int wlp_wss_send_copy(struct wlp *wlp, struct wlp_eda_node *eda_entry,
-		      void *_skb)
-{
-	int result = -ENOMEM;
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	struct sk_buff *skb = _skb;
-	struct sk_buff *copy;
-	struct uwb_dev_addr *dev_addr = &eda_entry->dev_addr;
-
-	copy = skb_copy(skb, GFP_ATOMIC);
-	if (copy == NULL) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Unable to copy skb for "
-				"transmission.\n");
-		goto out;
-	}
-	result = wlp_wss_connect_prep(wlp, eda_entry, copy);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Unable to connect/send skb "
-				"to neighbor.\n");
-		dev_kfree_skb_irq(copy);
-		goto out;
-	} else if (result == 1)
-		/* Frame will be transmitted separately */
-		goto out;
-	BUG_ON(wlp->xmit_frame == NULL);
-	result = wlp->xmit_frame(wlp, copy, dev_addr);
-	if (result < 0) {
-		if (printk_ratelimit())
-			dev_err(dev, "WLP: Unable to transmit frame: %d\n",
-				result);
-		if ((result == -ENXIO) && printk_ratelimit())
-			dev_err(dev, "WLP: Is network interface up? \n");
-		/* We could try again ... */
-		dev_kfree_skb_irq(copy);/*we need to free if tx fails */
-	}
-out:
-	return result;
-}
-
-
-/**
- * Setup WSS
- *
- * Should be called by network driver after the interface has been given a
- * MAC address.
- */
-int wlp_wss_setup(struct net_device *net_dev, struct wlp_wss *wss)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-	struct device *dev = &wlp->rc->uwb_dev.dev;
-	int result = 0;
-
-	mutex_lock(&wss->mutex);
-	wss->kobj.parent = &net_dev->dev.kobj;
-	if (!is_valid_ether_addr(net_dev->dev_addr)) {
-		dev_err(dev, "WLP: Invalid MAC address. Cannot use for"
-		       "virtual.\n");
-		result = -EINVAL;
-		goto out;
-	}
-	memcpy(wss->virtual_addr.data, net_dev->dev_addr,
-	       sizeof(wss->virtual_addr.data));
-out:
-	mutex_unlock(&wss->mutex);
-	return result;
-}
-EXPORT_SYMBOL_GPL(wlp_wss_setup);
-
-/**
- * Remove WSS
- *
- * Called by client that configured WSS through wlp_wss_setup(). This
- * function is called when client no longer needs WSS, eg. client shuts
- * down.
- *
- * We remove the WLP IE from the beacon before initiating local cleanup.
- */
-void wlp_wss_remove(struct wlp_wss *wss)
-{
-	struct wlp *wlp = container_of(wss, struct wlp, wss);
-
-	mutex_lock(&wss->mutex);
-	if (wss->state == WLP_WSS_STATE_ACTIVE)
-		uwb_rc_ie_rm(wlp->rc, UWB_IE_WLP);
-	if (wss->state != WLP_WSS_STATE_NONE) {
-		sysfs_remove_group(&wss->kobj, &wss_attr_group);
-		kobject_put(&wss->kobj);
-	}
-	wss->kobj.parent = NULL;
-	memset(&wss->virtual_addr, 0, sizeof(wss->virtual_addr));
-	/* Cleanup EDA cache */
-	wlp_eda_release(&wlp->eda);
-	wlp_eda_init(&wlp->eda);
-	mutex_unlock(&wss->mutex);
-}
-EXPORT_SYMBOL_GPL(wlp_wss_remove);

include/linux/wlp.h

···
-/*
- * WiMedia Logical Link Control Protocol (WLP)
- *
- * Copyright (C) 2005-2006 Intel Corporation
- * Reinette Chatre <[e-mail]>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * FIXME: docs
- *
- * - Does not (yet) include support for WLP control frames
- *   WLP Draft 0.99 [6.5].
- *
- *   A visual representation of the data structures.
- *
- *                              wssidB      wssidB
- *                               ^           ^
- *                               |           |
- *                              wssidA      wssidA
- *   wlp interface {             ^           ^
- *       ...                     |           |
- *       ...               ...  wssid      wssid ...
- *       wlp --- ...             |           |
- *   };          neighbors --> neighbA --> neighbB
- *               ...
- *               wss
- *               ...
- *               eda cache  --> neighborA --> neighborB --> neighborC ...
- */
-
-#ifndef __LINUX__WLP_H_
-#define __LINUX__WLP_H_
-
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <linux/list.h>
-#include <linux/uwb.h>
-
-/**
- * WLP Protocol ID
- * WLP Draft 0.99 [6.2]
- *
- * The MUX header for all WLP frames
- */
-#define WLP_PROTOCOL_ID 0x0100
-
-/**
- * WLP Version
- * WLP version placed in the association frames (WLP 0.99 [6.6])
- */
-#define WLP_VERSION 0x10
-
-/**
- * Bytes needed to print UUID as string
- */
-#define WLP_WSS_UUID_STRSIZE 48
-
-/**
- * Bytes needed to print nonce as string
- */
-#define WLP_WSS_NONCE_STRSIZE 48
-
-
-/**
- * Size used for WLP name size
- *
- * The WSS name is set to 65 bytes, 1 byte larger than the maximum
- * allowed by the WLP spec. This is to have a null terminated string
- * for display to the user. A maximum of 64 bytes will still be used
- * when placing the WSS name field in association frames.
- */
-#define WLP_WSS_NAME_SIZE 65
-
-/**
- * Number of bytes added by WLP to data frame
- *
- * A data frame transmitted from a host will be placed in a Standard or
- * Abbreviated WLP frame. These have an extra 4 bytes of header (struct
- * wlp_frame_std_abbrv_hdr).
- * When the stack sends this data frame for transmission it needs to ensure
- * there is enough headroom for this header.
- */
-#define WLP_DATA_HLEN 4
-
-/**
- * State of device regarding WLP Service Set
- *
- * WLP_WSS_STATE_NONE: the host does not participate in any WSS
- * WLP_WSS_STATE_PART_ENROLLED: used as part of the enrollment sequence
- *                            ("Partial Enroll"). This state is used to
- *                            indicate the first part of enrollment that is
- *                            unsecure. If the WSS is unsecure then the
- *                            state will promptly go to WLP_WSS_STATE_ENROLLED,
- *                            if the WSS is not secure then the enrollment
- *                            procedure is a few more steps before we are
- *                            enrolled.
- * WLP_WSS_STATE_ENROLLED: the host is enrolled in a WSS
- * WLP_WSS_STATE_ACTIVE: WSS is activated
- * WLP_WSS_STATE_CONNECTED: host is connected to neighbor in WSS
- *
- */
-enum wlp_wss_state {
-	WLP_WSS_STATE_NONE = 0,
-	WLP_WSS_STATE_PART_ENROLLED,
-	WLP_WSS_STATE_ENROLLED,
-	WLP_WSS_STATE_ACTIVE,
-	WLP_WSS_STATE_CONNECTED,
-};
-
-/**
- * WSS Secure status
- * WLP 0.99 Table 6
- *
- * Set to one if the WSS is secure, zero if it is not secure
- */
-enum wlp_wss_sec_status {
-	WLP_WSS_UNSECURE = 0,
-	WLP_WSS_SECURE,
-};
-
-/**
- * WLP frame type
- * WLP Draft 0.99 [6.2 Table 1]
- */
-enum wlp_frame_type {
-	WLP_FRAME_STANDARD = 0,
-	WLP_FRAME_ABBREVIATED,
-	WLP_FRAME_CONTROL,
-	WLP_FRAME_ASSOCIATION,
-};
-
-/**
- * WLP Association Message Type
- * WLP Draft 0.99 [6.6.1.2 Table 8]
- */
-enum wlp_assoc_type {
-	WLP_ASSOC_D1 = 2,
-	WLP_ASSOC_D2 = 3,
-	WLP_ASSOC_M1 = 4,
-	WLP_ASSOC_M2 = 5,
-	WLP_ASSOC_M3 = 7,
-	WLP_ASSOC_M4 = 8,
-	WLP_ASSOC_M5 = 9,
-	WLP_ASSOC_M6 = 10,
-	WLP_ASSOC_M7 = 11,
-	WLP_ASSOC_M8 = 12,
-	WLP_ASSOC_F0 = 14,
-	WLP_ASSOC_E1 = 32,
-	WLP_ASSOC_E2 = 33,
-	WLP_ASSOC_C1 = 34,
-	WLP_ASSOC_C2 = 35,
-	WLP_ASSOC_C3 = 36,
-	WLP_ASSOC_C4 = 37,
-};
-
-/**
- * WLP Attribute Type
- * WLP Draft 0.99 [6.6.1 Table 6]
- */
-enum wlp_attr_type {
-	WLP_ATTR_AUTH		= 0x1005, /* Authenticator */
-	WLP_ATTR_DEV_NAME 	= 0x1011, /* Device Name */
-	WLP_ATTR_DEV_PWD_ID 	= 0x1012, /* Device Password ID */
-	WLP_ATTR_E_HASH1	= 0x1014, /* E-Hash1 */
-	WLP_ATTR_E_HASH2	= 0x1015, /* E-Hash2 */
-	WLP_ATTR_E_SNONCE1	= 0x1016, /* E-SNonce1 */
-	WLP_ATTR_E_SNONCE2	= 0x1017, /* E-SNonce2 */
-	WLP_ATTR_ENCR_SET	= 0x1018, /* Encrypted Settings */
-	WLP_ATTR_ENRL_NONCE	= 0x101A, /* Enrollee Nonce */
-	WLP_ATTR_KEYWRAP_AUTH	= 0x101E, /* Key Wrap Authenticator */
-	WLP_ATTR_MANUF		= 0x1021, /* Manufacturer */
-	WLP_ATTR_MSG_TYPE	= 0x1022, /* Message Type */
-	WLP_ATTR_MODEL_NAME	= 0x1023, /* Model Name */
-	WLP_ATTR_MODEL_NR	= 0x1024, /* Model Number */
-	WLP_ATTR_PUB_KEY	= 0x1032, /* Public Key */
-	WLP_ATTR_REG_NONCE	= 0x1039, /* Registrar Nonce */
-	WLP_ATTR_R_HASH1	= 0x103D, /* R-Hash1 */
-	WLP_ATTR_R_HASH2	= 0x103E, /* R-Hash2 */
-	WLP_ATTR_R_SNONCE1	= 0x103F, /* R-SNonce1 */
-	WLP_ATTR_R_SNONCE2	= 0x1040, /* R-SNonce2 */
-	WLP_ATTR_SERIAL		= 0x1042, /* Serial number */
-	WLP_ATTR_UUID_E		= 0x1047, /* UUID-E */
-	WLP_ATTR_UUID_R		= 0x1048, /* UUID-R */
-	WLP_ATTR_PRI_DEV_TYPE	= 0x1054, /* Primary Device Type */
-	WLP_ATTR_SEC_DEV_TYPE	= 0x1055, /* Secondary Device Type */
-	WLP_ATTR_PORT_DEV	= 0x1056, /* Portable Device */
-	WLP_ATTR_APP_EXT	= 0x1058, /* Application Extension */
-	WLP_ATTR_WLP_VER	= 0x2000, /* WLP Version */
-	WLP_ATTR_WSSID		= 0x2001, /* WSSID */
-	WLP_ATTR_WSS_NAME	= 0x2002, /* WSS Name */
-	WLP_ATTR_WSS_SEC_STAT	= 0x2003, /* WSS Secure Status */
-	WLP_ATTR_WSS_BCAST	= 0x2004, /* WSS Broadcast Address */
-	WLP_ATTR_WSS_M_KEY	= 0x2005, /* WSS Master Key */
-	WLP_ATTR_ACC_ENRL	= 0x2006, /* Accepting Enrollment */
-	WLP_ATTR_WSS_INFO	= 0x2007, /* WSS Information */
-	WLP_ATTR_WSS_SEL_MTHD	= 0x2008, /* WSS Selection Method */
-	WLP_ATTR_ASSC_MTHD_LIST	= 0x2009, /* Association Methods List */
-	WLP_ATTR_SEL_ASSC_MTHD	= 0x200A, /* Selected Association Method */
-	WLP_ATTR_ENRL_HASH_COMM	= 0x200B, /* Enrollee Hash Commitment */
-	WLP_ATTR_WSS_TAG	= 0x200C, /* WSS Tag */
-	WLP_ATTR_WSS_VIRT	= 0x200D, /* WSS Virtual EUI-48 */
-	WLP_ATTR_WLP_ASSC_ERR	= 0x200E, /* WLP Association Error */
-	WLP_ATTR_VNDR_EXT	= 0x200F, /* Vendor Extension */
-};
-
-/**
- * WLP Category ID of primary/secondary device
- * WLP Draft 0.99 [6.6.1.8 Table 12]
- */
-enum wlp_dev_category_id {
-	WLP_DEV_CAT_COMPUTER = 1,
-	WLP_DEV_CAT_INPUT,
-	WLP_DEV_CAT_PRINT_SCAN_FAX_COPIER,
-	WLP_DEV_CAT_CAMERA,
-	WLP_DEV_CAT_STORAGE,
-	WLP_DEV_CAT_INFRASTRUCTURE,
-	WLP_DEV_CAT_DISPLAY,
-	WLP_DEV_CAT_MULTIM,
-	WLP_DEV_CAT_GAMING,
-	WLP_DEV_CAT_TELEPHONE,
-	WLP_DEV_CAT_OTHER = 65535,
-};
-
-/**
- * WLP WSS selection method
- * WLP Draft 0.99 [6.6.1.6 Table 10]
- */
-enum wlp_wss_sel_mthd {
-	WLP_WSS_ENRL_SELECT = 1,	/* Enrollee selects */
-	WLP_WSS_REG_SELECT,		/* Registrar selects */
-};
-
-/**
- * WLP association error values
- * WLP Draft 0.99 [6.6.1.5 Table 9]
- */
-enum wlp_assc_error {
-	WLP_ASSOC_ERROR_NONE,
-	WLP_ASSOC_ERROR_AUTH,		/* Authenticator Failure */
-	WLP_ASSOC_ERROR_ROGUE,		/* Rogue activity suspected */
-	WLP_ASSOC_ERROR_BUSY,		/* Device busy */
-	WLP_ASSOC_ERROR_LOCK,		/* Setup Locked */
-	WLP_ASSOC_ERROR_NOT_READY,	/* Registrar not ready */
-	WLP_ASSOC_ERROR_INV,		/* Invalid WSS selection */
-	WLP_ASSOC_ERROR_MSG_TIME,	/* Message timeout */
-	WLP_ASSOC_ERROR_ENR_TIME,	/* Enrollment session timeout */
-	WLP_ASSOC_ERROR_PW,		/* Device password invalid */
-	WLP_ASSOC_ERROR_VER,		/* Unsupported version */
-	WLP_ASSOC_ERROR_INT,		/* Internal error */
-	WLP_ASSOC_ERROR_UNDEF,		/* Undefined error */
-	WLP_ASSOC_ERROR_NUM,		/* Numeric comparison failure */
-	WLP_ASSOC_ERROR_WAIT,		/* Waiting for user input */
-};
-
-/**
- * WLP Parameters
- * WLP 0.99 [7.7]
- */
-enum wlp_parameters {
-	WLP_PER_MSG_TIMEOUT = 15,	/* Seconds to wait for response to
-					   association message. */
-};
-
-/**
- * WLP IE
- *
- * The WLP IE should be included in beacons by all devices.
- *
- * The driver can set only a few of the fields in this information element,
- * most fields are managed by the device self. When the driver needs to set
- * a field it will only provide values for the fields of interest, the rest
- * will be filled with zeroes. The fields of interest are:
- *
- * Element ID
- * Length
- * Capabilities (only to include WSSID Hash list length)
- * WSSID Hash List fields
- *
- * WLP 0.99 [6.7]
- *
- * Only the fields that will be used are detailed in this structure, rest
- * are not detailed or marked as "notused".
- */
-struct wlp_ie {
-	struct uwb_ie_hdr hdr;
-	__le16 capabilities;
-	__le16 cycle_param;
-	__le16 acw_anchor_addr;
-	u8 wssid_hash_list[];
-} __packed;
-
-static inline int wlp_ie_hash_length(struct wlp_ie *ie)
-{
-	return (le16_to_cpu(ie->capabilities) >> 12) & 0xf;
-}
-
-static inline void wlp_ie_set_hash_length(struct wlp_ie *ie, int hash_length)
-{
-	u16 caps = le16_to_cpu(ie->capabilities);
-	caps = (caps & ~(0xf << 12)) | (hash_length << 12);
-	ie->capabilities = cpu_to_le16(caps);
-}
-
-/**
- * WLP nonce
- * WLP Draft 0.99 [6.6.1 Table 6]
- *
- * A 128-bit random number often used (E-SNonce1, E-SNonce2, Enrollee
- * Nonce, Registrar Nonce, R-SNonce1, R-SNonce2). It is passed to HW so
- * it is packed.
- */
-struct wlp_nonce {
-	u8 data[16];
-} __packed;
-
-/**
- * WLP UUID
- * WLP Draft 0.99 [6.6.1 Table 6]
- *
- * Universally Unique Identifier (UUID) encoded as an octet string in the
- * order the octets are shown in string representation in RFC4122. A UUID
- * is often used (UUID-E, UUID-R, WSSID). It is passed to HW so it is packed.
- */
-struct wlp_uuid {
-	u8 data[16];
-} __packed;
-
-
-/**
- * Primary and secondary device type attributes
- * WLP Draft 0.99 [6.6.1.8]
- */
-struct wlp_dev_type {
-	enum wlp_dev_category_id category:16;
-	u8 OUI[3];
-	u8 OUIsubdiv;
-	__le16 subID;
-} __packed;
-
-/**
- * WLP frame header
- * WLP Draft 0.99 [6.2]
- */
-struct wlp_frame_hdr {
-	__le16 mux_hdr;			/* WLP_PROTOCOL_ID */
-	enum wlp_frame_type type:8;
-} __packed;
-
-/**
- * WLP attribute field header
- * WLP Draft 0.99 [6.6.1]
- *
- * Header of each attribute found in an association frame
- */
-struct wlp_attr_hdr {
-	__le16 type;
-	__le16 length;
-} __packed;
-
-/**
- * Device information commonly used together
- *
- * Each of these device information elements has a specified range in which it
- * should fit (WLP 0.99 [Table 6]). This range provided in the spec does not
- * include the termination null '\0' character (when used in the
- * association protocol the attribute fields are accompanied
- * with a "length" field so the full range from the spec can be used for
- * the value). We thus allocate an extra byte to be able to store a string
- * of max length with a terminating '\0'.
- */
-struct wlp_device_info {
-	char name[33];
-	char model_name[33];
-	char manufacturer[65];
-	char model_nr[33];
-	char serial[33];
-	struct wlp_dev_type prim_dev_type;
-};
-
-/**
- * Macros for the WLP attributes
- *
- * There are quite a few attributes (total is 43). The attribute layout can be
- * in one of three categories: one value, an array, an enum forced to 8 bits.
- * These macros help with their definitions.
- */
-#define wlp_attr(type, name)						\
-struct wlp_attr_##name {						\
-	struct wlp_attr_hdr hdr;					\
-	type name;							\
-} __packed;
-
-#define wlp_attr_array(type, name)					\
-struct wlp_attr_##name {						\
-	struct wlp_attr_hdr hdr;					\
-	type name[];							\
-} __packed;
-
-/**
- * WLP association attribute fields
- * WLP Draft 0.99 [6.6.1 Table 6]
- *
- * Attributes appear in same order as the Table in the spec
- * FIXME Does not define all attributes yet
- */
-
-/* Device name: Friendly name of sending device */
-wlp_attr_array(u8, dev_name)
-
-/* Enrollee Nonce: Random number generated by enrollee for an enrollment
- * session */
-wlp_attr(struct wlp_nonce, enonce)
-
-/* Manufacturer name: Name of manufacturer of the sending device */
-wlp_attr_array(u8, manufacturer)
-
-/* WLP Message Type */
-wlp_attr(u8, msg_type)
-
-/* WLP Model name: Model name of sending device */
-wlp_attr_array(u8, model_name)
-
-/* WLP Model number: Model number of sending device */
-wlp_attr_array(u8, model_nr)
-
-/* Registrar Nonce: Random number generated by registrar for an enrollment
- * session */
-wlp_attr(struct wlp_nonce, rnonce)
-
-/* Serial number of device */
-wlp_attr_array(u8, serial)
-
-/* UUID of enrollee */
-wlp_attr(struct wlp_uuid, uuid_e)
-
-/* UUID of registrar */
-wlp_attr(struct wlp_uuid, uuid_r)
-
-/* WLP Primary device type */
-wlp_attr(struct wlp_dev_type, prim_dev_type)
-
-/* WLP Secondary device type */
-wlp_attr(struct wlp_dev_type, sec_dev_type)
-
-/* WLP protocol version */
-wlp_attr(u8, version)
-
-/* WLP service set identifier */
-wlp_attr(struct wlp_uuid, wssid)
-
-/* WLP WSS name */
-wlp_attr_array(u8, wss_name)
-
-/* WLP WSS Secure Status */
-wlp_attr(u8, wss_sec_status)
-
-/* WSS Broadcast Address */
-wlp_attr(struct uwb_mac_addr, wss_bcast)
-
-/* WLP Accepting Enrollment */
-wlp_attr(u8, accept_enrl)
-
-/**
- * WSS information attributes
- * WLP Draft 0.99 [6.6.3 Table 15]
- */
-struct wlp_wss_info {
-	struct wlp_attr_wssid wssid;
-	struct wlp_attr_wss_name name;
-	struct wlp_attr_accept_enrl accept;
-	struct wlp_attr_wss_sec_status sec_stat;
-	struct wlp_attr_wss_bcast bcast;
-} __packed;
-
-/* WLP WSS Information */
-wlp_attr_array(struct wlp_wss_info, wss_info)
-
-/* WLP WSS Selection method */
-wlp_attr(u8, wss_sel_mthd)
-
-/* WLP WSS tag */
-wlp_attr(u8, wss_tag)
-
-/* WSS Virtual Address */
-wlp_attr(struct uwb_mac_addr, wss_virt)
-
-/* WLP association error */
-wlp_attr(u8, wlp_assc_err)
-
-/**
- * WLP standard and abbreviated frames
- *
- * WLP Draft 0.99 [6.3] and [6.4]
- *
- * The difference between the WLP standard frame and the WLP
- * abbreviated frame is that the standard frame includes the src
- * and dest addresses from the Ethernet header, the abbreviated frame does
- * not.
- * The src/dest (as well as the type/length and client data) are already
- * defined as part of the Ethernet header, we do not do this here.
- * From this perspective the standard and abbreviated frames appear the
- * same - they will be treated differently though.
- *
- * The size of this header is also captured in WLP_DATA_HLEN to enable
- * interfaces to prepare their headroom.
- */
-struct wlp_frame_std_abbrv_hdr {
-	struct wlp_frame_hdr hdr;
-	u8 tag;
-} __packed;
-
-/**
- * WLP association frames
- *
- * WLP Draft 0.99 [6.6]
- */
-struct wlp_frame_assoc {
-	struct wlp_frame_hdr hdr;
-	enum wlp_assoc_type type:8;
-	struct wlp_attr_version version;
-	struct wlp_attr_msg_type msg_type;
-	u8 attr[];
-} __packed;
-
-/* Ethernet to dev address mapping */
-struct wlp_eda {
-	spinlock_t lock;
-	struct list_head cache;	/* Eth<->Dev Addr cache */
-};
-
-/**
- * WSS information temporary storage
- *
- * This information is only stored temporarily during discovery. It should
- * not be stored unless the device is enrolled in the advertised WSS. This
- * is done mainly because we follow the letter of the spec in this regard.
- * See WLP 0.99 [7.2.3].
- * When the device does become enrolled in a WSS the WSS information will
- * be stored as part of the more comprehensive struct wlp_wss.
- */
-struct wlp_wss_tmp_info {
-	char name[WLP_WSS_NAME_SIZE];
-	u8 accept_enroll;
-	u8 sec_status;
-	struct uwb_mac_addr bcast;
-};
-
-struct wlp_wssid_e {
-	struct list_head node;
-	struct wlp_uuid wssid;
-	struct wlp_wss_tmp_info *info;
-};
-
-/**
- * A cache entry of WLP neighborhood
- *
- * @node: head of list is wlp->neighbors
- * @wssid: list of wssids of this neighbor, element is wlp_wssid_e
- * @info:  temporary storage for information learned during discovery. This
- *         storage is used together with the wssid_e temporary storage
- *         during discovery.
- */
-struct wlp_neighbor_e {
-	struct list_head node;
-	struct wlp_uuid uuid;
-	struct uwb_dev *uwb_dev;
-	struct list_head wssid; /* Elements are wlp_wssid_e */
-	struct wlp_device_info *info;
-};
-
-struct wlp;
-/**
- * Information for an association session in progress.
- *
- * @exp_message: The type of the expected message. Both this message and a
- *               F0 message (which can be sent in response to any
- *               association frame) will be accepted as a valid message for
- *               this session.
- * @cb:          The function that will be called upon receipt of this
- *               message.
- * @cb_priv:     Private data of callback
- * @data:        Data used in association process (always a sk_buff?)
- * @neighbor:    Address of neighbor with which association session is in
- *               progress.
- */
-struct wlp_session {
-	enum wlp_assoc_type exp_message;
-	void (*cb)(struct wlp *);
-	void *cb_priv;
-	void *data;
-	struct uwb_dev_addr neighbor_addr;
-};
-
-/**
- * WLP Service Set
- *
- * @mutex: used to protect entire WSS structure.
- *
- * @name: The WSS name is set to 65 bytes, 1 byte larger than the maximum
- *        allowed by the WLP spec. This is to have a null terminated string
- *        for display to the user. A maximum of 64 bytes will still be used
- *        when placing the WSS name field in association frames.
- *
- * @accept_enroll: Accepting enrollment: Set to one if registrar is
- *                 accepting enrollment in WSS, or zero otherwise.
- *
- * Global and local information for each WSS in which we are enrolled.
- * WLP 0.99 Section 7.2.1 and Section 7.2.2
- */
-struct wlp_wss {
-	struct mutex mutex;
-	struct kobject kobj;
-	/* Global properties. */
-	struct wlp_uuid wssid;
-	u8 hash;
-	char name[WLP_WSS_NAME_SIZE];
-	struct uwb_mac_addr bcast;
-	u8 secure_status:1;
-	u8 master_key[16];
-	/* Local properties. */
-	u8 tag;
-	struct uwb_mac_addr virtual_addr;
-	/* Extra */
-	u8 accept_enroll:1;
-	enum wlp_wss_state state;
-};
-
-/**
- * WLP main structure
- * @mutex: protect changes to WLP structure. We only allow changes to the
- *         uuid, so currently this mutex only protects this field.
- */
-struct wlp {
-	struct mutex mutex;
-	struct uwb_rc *rc;		/* UWB radio controller */
-	struct net_device *ndev;
-	struct uwb_pal pal;
-	struct wlp_eda eda;
-	struct wlp_uuid uuid;
-	struct wlp_session *session;
-	struct wlp_wss wss;
-	struct mutex nbmutex; /* Neighbor mutex protects neighbors list */
-	struct list_head neighbors; /* Elements are wlp_neighbor_e */
-	struct uwb_notifs_handler uwb_notifs_handler;
-	struct wlp_device_info *dev_info;
-	void (*fill_device_info)(struct wlp *wlp, struct wlp_device_info *info);
-	int (*xmit_frame)(struct wlp *, struct sk_buff *,
-			  struct uwb_dev_addr *);
-	void (*stop_queue)(struct wlp *);
-	void (*start_queue)(struct wlp *);
-};
-
-/* sysfs */
-
-
-struct wlp_wss_attribute {
-	struct attribute attr;
-	ssize_t (*show)(struct wlp_wss *wss, char *buf);
-	ssize_t (*store)(struct wlp_wss *wss, const char *buf, size_t count);
-};
-
-#define WSS_ATTR(_name, _mode, _show, _store) \
-static struct wlp_wss_attribute wss_attr_##_name = __ATTR(_name, _mode,	\
-							  _show, _store)
-
-extern int wlp_setup(struct wlp *, struct uwb_rc *, struct net_device *ndev);
-extern void wlp_remove(struct wlp *);
-extern ssize_t wlp_neighborhood_show(struct wlp *, char *);
-extern int wlp_wss_setup(struct net_device *, struct wlp_wss *);
-extern void wlp_wss_remove(struct wlp_wss *);
-extern ssize_t wlp_wss_activate_show(struct wlp_wss *, char *);
-extern ssize_t wlp_wss_activate_store(struct wlp_wss *, const char *, size_t);
-extern ssize_t wlp_eda_show(struct wlp *, char *);
-extern ssize_t wlp_eda_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_uuid_show(struct wlp *, char *);
-extern ssize_t wlp_uuid_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_name_show(struct wlp *, char *);
-extern ssize_t wlp_dev_name_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_manufacturer_show(struct wlp *, char *);
-extern ssize_t wlp_dev_manufacturer_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_model_name_show(struct wlp *, char *);
-extern ssize_t wlp_dev_model_name_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_model_nr_show(struct wlp *, char *);
-extern ssize_t wlp_dev_model_nr_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_serial_show(struct wlp *, char *);
-extern ssize_t wlp_dev_serial_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_prim_category_show(struct wlp *, char *);
-extern ssize_t wlp_dev_prim_category_store(struct wlp *, const char *,
-					   size_t);
-extern ssize_t wlp_dev_prim_OUI_show(struct wlp *, char *);
-extern ssize_t wlp_dev_prim_OUI_store(struct wlp *, const char *, size_t);
-extern ssize_t wlp_dev_prim_OUI_sub_show(struct wlp *, char *);
-extern ssize_t wlp_dev_prim_OUI_sub_store(struct wlp *, const char *,
-					  size_t);
-extern ssize_t wlp_dev_prim_subcat_show(struct wlp *, char *);
-extern ssize_t wlp_dev_prim_subcat_store(struct wlp *, const char *,
-					 size_t);
-extern int wlp_receive_frame(struct device *, struct wlp *, struct sk_buff *,
-			     struct uwb_dev_addr *);
-extern int wlp_prepare_tx_frame(struct device *, struct wlp *,
-			       struct sk_buff *, struct uwb_dev_addr *);
-void wlp_reset_all(struct wlp *wlp);
-
-/**
- * Initialize WSS
- */
-static inline
-void wlp_wss_init(struct wlp_wss *wss)
-{
-	mutex_init(&wss->mutex);
-}
-
-static inline
-void wlp_init(struct wlp *wlp)
-{
-	INIT_LIST_HEAD(&wlp->neighbors);
-	mutex_init(&wlp->mutex);
-	mutex_init(&wlp->nbmutex);
-	wlp_wss_init(&wlp->wss);
-}
-
-
-#endif /* #ifndef __LINUX__WLP_H_ */