uwb: add the WiMedia LLC Protocol stack

Add the generic code for the WiMedia Logical Link Control Protocol (WLP).

This has been split into several patches for easier review.

core (this patch):
  - everything else

messages:
  - WLP message construction/decode

wss:
  - Wireless Service Set support

build-system:
  - Kconfig and Kbuild files
Signed-off-by: David Vrabel <david.vrabel@csr.com>

drivers/uwb/wlp/driver.c

+/*
+ * WiMedia Logical Link Control Protocol (WLP)
+ *
+ * Copyright (C) 2007 Intel Corporation
+ * Reinette Chatre <reinette.chatre@intel.com>
+ *
+ * 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 <reinette.chatre@intel.com>");
+MODULE_DESCRIPTION("WiMedia Logical Link Control Protocol (WLP)");
+MODULE_LICENSE("GPL");

drivers/uwb/wlp/wlp-internal.h

+/*
+ * WiMedia Logical Link Control Protocol (WLP)
+ * Internal API
+ *
+ * Copyright (C) 2007 Intel Corporation
+ * Reinette Chatre <reinette.chatre@intel.com>
+ *
+ * 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;
+
+extern int uwb_rc_ie_add(struct uwb_rc *, const struct uwb_ie_hdr *, size_t);
+extern int uwb_rc_ie_rm(struct uwb_rc *, enum uwb_ie);
+
+
+/* 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__ */