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Diffstat (limited to 'drivers/uwb/uwb-internal.h')
| -rw-r--r-- | drivers/uwb/uwb-internal.h | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/drivers/uwb/uwb-internal.h b/drivers/uwb/uwb-internal.h new file mode 100644 index 000000000000..2ad307d12961 --- /dev/null +++ b/drivers/uwb/uwb-internal.h @@ -0,0 +1,305 @@ +/* + * 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__ */ |