1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
|
/*
* Ultra Wide Band
* UWB internal API
*
* Copyright (C) 2005-2006 Intel Corporation
* Inaky Perez-Gonzalez <inaky.perez-gonzalez@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.
*
* This contains most of the internal API for UWB. This is stuff used
* across the stack that of course, is of no interest to the rest.
*
* Some parts might end up going public (like uwb_rc_*())...
*/
#ifndef __UWB_INTERNAL_H__
#define __UWB_INTERNAL_H__
#include <linux/version.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/uwb.h>
#include <linux/mutex.h>
struct uwb_beca_e;
/* General device API */
extern void uwb_dev_init(struct uwb_dev *uwb_dev);
extern int __uwb_dev_offair(struct uwb_dev *, struct uwb_rc *);
extern int uwb_dev_add(struct uwb_dev *uwb_dev, struct device *parent_dev,
struct uwb_rc *parent_rc);
extern void uwb_dev_rm(struct uwb_dev *uwb_dev);
extern void uwbd_dev_onair(struct uwb_rc *, struct uwb_beca_e *);
extern void uwbd_dev_offair(struct uwb_beca_e *);
void uwb_notify(struct uwb_rc *rc, struct uwb_dev *uwb_dev, enum uwb_notifs event);
/* General UWB Radio Controller Internal API */
extern struct uwb_rc *__uwb_rc_try_get(struct uwb_rc *);
static inline struct uwb_rc *__uwb_rc_get(struct uwb_rc *rc)
{
uwb_dev_get(&rc->uwb_dev);
return rc;
}
static inline void __uwb_rc_put(struct uwb_rc *rc)
{
uwb_dev_put(&rc->uwb_dev);
}
extern int uwb_rc_reset(struct uwb_rc *rc);
extern int uwb_rc_beacon(struct uwb_rc *rc,
int channel, unsigned bpst_offset);
extern int uwb_rc_scan(struct uwb_rc *rc,
unsigned channel, enum uwb_scan_type type,
unsigned bpst_offset);
extern int uwb_rc_send_all_drp_ie(struct uwb_rc *rc);
extern ssize_t uwb_rc_print_IEs(struct uwb_rc *rc, char *, size_t);
extern void uwb_rc_ie_init(struct uwb_rc *);
extern void uwb_rc_ie_init(struct uwb_rc *);
extern ssize_t uwb_rc_ie_setup(struct uwb_rc *);
extern void uwb_rc_ie_release(struct uwb_rc *);
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);
extern const char *uwb_rc_strerror(unsigned code);
/*
* Time to wait for a response to an RC command.
*
* Some commands can take a long time to response. e.g., START_BEACON
* may scan for several superframes before joining an existing beacon
* group and this can take around 600 ms.
*/
#define UWB_RC_CMD_TIMEOUT_MS 1000 /* ms */
/*
* Notification/Event Handlers
*/
struct uwb_rc_neh;
void uwb_rc_neh_create(struct uwb_rc *rc);
void uwb_rc_neh_destroy(struct uwb_rc *rc);
struct uwb_rc_neh *uwb_rc_neh_add(struct uwb_rc *rc, struct uwb_rccb *cmd,
u8 expected_type, u16 expected_event,
uwb_rc_cmd_cb_f cb, void *arg);
void uwb_rc_neh_rm(struct uwb_rc *rc, struct uwb_rc_neh *neh);
void uwb_rc_neh_arm(struct uwb_rc *rc, struct uwb_rc_neh *neh);
void uwb_rc_neh_put(struct uwb_rc_neh *neh);
/* Event size tables */
extern int uwb_est_create(void);
extern void uwb_est_destroy(void);
/*
* UWB Events & management daemon
*/
/**
* enum uwb_event_type - types of UWB management daemon events
*
* The UWB management daemon (uwbd) can receive two types of events:
* UWB_EVT_TYPE_NOTIF - notification from the radio controller.
* UWB_EVT_TYPE_MSG - a simple message.
*/
enum uwb_event_type {
UWB_EVT_TYPE_NOTIF,
UWB_EVT_TYPE_MSG,
};
/**
* struct uwb_event_notif - an event for a radio controller notification
* @size: Size of the buffer (ie: Guaranteed to contain at least
* a full 'struct uwb_rceb')
* @rceb: Pointer to a kmalloced() event payload
*/
struct uwb_event_notif {
size_t size;
struct uwb_rceb *rceb;
};
/**
* enum uwb_event_message - an event for a message for asynchronous processing
*
* UWB_EVT_MSG_RESET - reset the radio controller and all PAL hardware.
*/
enum uwb_event_message {
UWB_EVT_MSG_RESET,
};
/**
* UWB Event
* @rc: Radio controller that emitted the event (referenced)
* @ts_jiffies: Timestamp, when was it received
* @type: This event's type.
*/
struct uwb_event {
struct list_head list_node;
struct uwb_rc *rc;
unsigned long ts_jiffies;
enum uwb_event_type type;
union {
struct uwb_event_notif notif;
enum uwb_event_message message;
};
};
extern void uwbd_start(void);
extern void uwbd_stop(void);
extern struct uwb_event *uwb_event_alloc(size_t, gfp_t gfp_mask);
extern void uwbd_event_queue(struct uwb_event *);
void uwbd_flush(struct uwb_rc *rc);
/* UWB event handlers */
extern int uwbd_evt_handle_rc_beacon(struct uwb_event *);
extern int uwbd_evt_handle_rc_beacon_size(struct uwb_event *);
extern int uwbd_evt_handle_rc_bpoie_change(struct uwb_event *);
extern int uwbd_evt_handle_rc_bp_slot_change(struct uwb_event *);
extern int uwbd_evt_handle_rc_drp(struct uwb_event *);
extern int uwbd_evt_handle_rc_drp_avail(struct uwb_event *);
int uwbd_msg_handle_reset(struct uwb_event *evt);
/*
* Address management
*/
int uwb_rc_dev_addr_assign(struct uwb_rc *rc);
int uwbd_evt_handle_rc_dev_addr_conflict(struct uwb_event *evt);
/*
* UWB Beacon Cache
*
* Each beacon we received is kept in a cache--when we receive that
* beacon consistently, that means there is a new device that we have
* to add to the system.
*/
extern unsigned long beacon_timeout_ms;
/** Beacon cache list */
struct uwb_beca {
struct list_head list;
size_t entries;
struct mutex mutex;
};
extern struct uwb_beca uwb_beca;
/**
* Beacon cache entry
*
* @jiffies_refresh: last time a beacon was received that refreshed
* this cache entry.
* @uwb_dev: device connected to this beacon. This pointer is not
* safe, you need to get it with uwb_dev_try_get()
*
* @hits: how many time we have seen this beacon since last time we
* cleared it
*/
struct uwb_beca_e {
struct mutex mutex;
struct kref refcnt;
struct list_head node;
struct uwb_mac_addr *mac_addr;
struct uwb_dev_addr dev_addr;
u8 hits;
unsigned long ts_jiffies;
struct uwb_dev *uwb_dev;
struct uwb_rc_evt_beacon *be;
struct stats lqe_stats, rssi_stats; /* radio statistics */
};
struct uwb_beacon_frame;
extern ssize_t uwb_bce_print_IEs(struct uwb_dev *, struct uwb_beca_e *,
char *, size_t);
extern struct uwb_beca_e *__uwb_beca_add(struct uwb_rc_evt_beacon *,
struct uwb_beacon_frame *,
unsigned long);
extern void uwb_bce_kfree(struct kref *_bce);
static inline void uwb_bce_get(struct uwb_beca_e *bce)
{
kref_get(&bce->refcnt);
}
static inline void uwb_bce_put(struct uwb_beca_e *bce)
{
kref_put(&bce->refcnt, uwb_bce_kfree);
}
extern void uwb_beca_purge(void);
extern void uwb_beca_release(void);
struct uwb_dev *uwb_dev_get_by_devaddr(struct uwb_rc *rc,
const struct uwb_dev_addr *devaddr);
struct uwb_dev *uwb_dev_get_by_macaddr(struct uwb_rc *rc,
const struct uwb_mac_addr *macaddr);
/* -- UWB Sysfs representation */
extern struct class uwb_rc_class;
extern struct device_attribute dev_attr_mac_address;
extern struct device_attribute dev_attr_beacon;
extern struct device_attribute dev_attr_scan;
/* -- DRP Bandwidth allocator: bandwidth allocations, reservations, DRP */
void uwb_rsv_init(struct uwb_rc *rc);
int uwb_rsv_setup(struct uwb_rc *rc);
void uwb_rsv_cleanup(struct uwb_rc *rc);
void uwb_rsv_set_state(struct uwb_rsv *rsv, enum uwb_rsv_state new_state);
void uwb_rsv_remove(struct uwb_rsv *rsv);
struct uwb_rsv *uwb_rsv_find(struct uwb_rc *rc, struct uwb_dev *src,
struct uwb_ie_drp *drp_ie);
void uwb_rsv_sched_update(struct uwb_rc *rc);
void uwb_drp_handle_timeout(struct uwb_rsv *rsv);
int uwb_drp_ie_update(struct uwb_rsv *rsv);
void uwb_drp_ie_to_bm(struct uwb_mas_bm *bm, const struct uwb_ie_drp *drp_ie);
void uwb_drp_avail_init(struct uwb_rc *rc);
int uwb_drp_avail_reserve_pending(struct uwb_rc *rc, struct uwb_mas_bm *mas);
void uwb_drp_avail_reserve(struct uwb_rc *rc, struct uwb_mas_bm *mas);
void uwb_drp_avail_release(struct uwb_rc *rc, struct uwb_mas_bm *mas);
void uwb_drp_avail_ie_update(struct uwb_rc *rc);
/* -- PAL support */
void uwb_rc_pal_init(struct uwb_rc *rc);
/* -- Misc */
extern ssize_t uwb_mac_frame_hdr_print(char *, size_t,
const struct uwb_mac_frame_hdr *);
/* -- Debug interface */
void uwb_dbg_init(void);
void uwb_dbg_exit(void);
void uwb_dbg_add_rc(struct uwb_rc *rc);
void uwb_dbg_del_rc(struct uwb_rc *rc);
/* Workarounds for version specific stuff */
static inline void uwb_dev_lock(struct uwb_dev *uwb_dev)
{
down(&uwb_dev->dev.sem);
}
static inline void uwb_dev_unlock(struct uwb_dev *uwb_dev)
{
up(&uwb_dev->dev.sem);
}
#endif /* #ifndef __UWB_INTERNAL_H__ */
|
