266 lines
9.4 KiB
C
266 lines
9.4 KiB
C
/*
|
|
* IEEE802.15.4-2003 specification
|
|
*
|
|
* Copyright (C) 2007-2012 Siemens AG
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
#ifndef NET_MAC802154_H
|
|
#define NET_MAC802154_H
|
|
|
|
#include <net/af_ieee802154.h>
|
|
#include <linux/ieee802154.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
/* General MAC frame format:
|
|
* 2 bytes: Frame Control
|
|
* 1 byte: Sequence Number
|
|
* 20 bytes: Addressing fields
|
|
* 14 bytes: Auxiliary Security Header
|
|
*/
|
|
#define MAC802154_FRAME_HARD_HEADER_LEN (2 + 1 + 20 + 14)
|
|
|
|
/* The following flags are used to indicate changed address settings from
|
|
* the stack to the hardware.
|
|
*/
|
|
|
|
/* indicates that the Short Address changed */
|
|
#define IEEE802154_AFILT_SADDR_CHANGED 0x00000001
|
|
/* indicates that the IEEE Address changed */
|
|
#define IEEE802154_AFILT_IEEEADDR_CHANGED 0x00000002
|
|
/* indicates that the PAN ID changed */
|
|
#define IEEE802154_AFILT_PANID_CHANGED 0x00000004
|
|
/* indicates that PAN Coordinator status changed */
|
|
#define IEEE802154_AFILT_PANC_CHANGED 0x00000008
|
|
|
|
struct ieee802154_hw_addr_filt {
|
|
__le16 pan_id; /* Each independent PAN selects a unique
|
|
* identifier. This PAN id allows communication
|
|
* between devices within a network using short
|
|
* addresses and enables transmissions between
|
|
* devices across independent networks.
|
|
*/
|
|
__le16 short_addr;
|
|
__le64 ieee_addr;
|
|
u8 pan_coord;
|
|
};
|
|
|
|
struct ieee802154_vif {
|
|
int type;
|
|
|
|
/* must be last */
|
|
u8 drv_priv[0] __aligned(sizeof(void *));
|
|
};
|
|
|
|
struct ieee802154_hw {
|
|
/* filled by the driver */
|
|
int extra_tx_headroom;
|
|
u32 flags;
|
|
struct device *parent;
|
|
|
|
/* filled by mac802154 core */
|
|
struct ieee802154_hw_addr_filt hw_filt;
|
|
void *priv;
|
|
struct wpan_phy *phy;
|
|
size_t vif_data_size;
|
|
};
|
|
|
|
/* Checksum is in hardware and is omitted from a packet
|
|
*
|
|
* These following flags are used to indicate hardware capabilities to
|
|
* the stack. Generally, flags here should have their meaning
|
|
* done in a way that the simplest hardware doesn't need setting
|
|
* any particular flags. There are some exceptions to this rule,
|
|
* however, so you are advised to review these flags carefully.
|
|
*/
|
|
|
|
/* Indicates that xmitter will add FCS on it's own. */
|
|
#define IEEE802154_HW_TX_OMIT_CKSUM 0x00000001
|
|
/* Indicates that receiver will autorespond with ACK frames. */
|
|
#define IEEE802154_HW_AACK 0x00000002
|
|
/* Indicates that transceiver will support transmit power setting. */
|
|
#define IEEE802154_HW_TXPOWER 0x00000004
|
|
/* Indicates that transceiver will support listen before transmit. */
|
|
#define IEEE802154_HW_LBT 0x00000008
|
|
/* Indicates that transceiver will support cca mode setting. */
|
|
#define IEEE802154_HW_CCA_MODE 0x00000010
|
|
/* Indicates that transceiver will support cca ed level setting. */
|
|
#define IEEE802154_HW_CCA_ED_LEVEL 0x00000020
|
|
/* Indicates that transceiver will support csma (max_be, min_be, csma retries)
|
|
* settings. */
|
|
#define IEEE802154_HW_CSMA_PARAMS 0x00000040
|
|
/* Indicates that transceiver will support ARET frame retries setting. */
|
|
#define IEEE802154_HW_FRAME_RETRIES 0x00000080
|
|
/* Indicates that transceiver will support hardware address filter setting. */
|
|
#define IEEE802154_HW_AFILT 0x00000100
|
|
/* Indicates that transceiver will support promiscuous mode setting. */
|
|
#define IEEE802154_HW_PROMISCUOUS 0x00000200
|
|
/* Indicates that receiver omits FCS. */
|
|
#define IEEE802154_HW_RX_OMIT_CKSUM 0x00000400
|
|
/* Indicates that receiver will not filter frames with bad checksum. */
|
|
#define IEEE802154_HW_RX_DROP_BAD_CKSUM 0x00000800
|
|
|
|
/* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */
|
|
#define IEEE802154_HW_OMIT_CKSUM (IEEE802154_HW_TX_OMIT_CKSUM | \
|
|
IEEE802154_HW_RX_OMIT_CKSUM)
|
|
|
|
/* This groups the most common CSMA support fields into one. */
|
|
#define IEEE802154_HW_CSMA (IEEE802154_HW_CCA_MODE | \
|
|
IEEE802154_HW_CCA_ED_LEVEL | \
|
|
IEEE802154_HW_CSMA_PARAMS)
|
|
|
|
/* This groups the most common ARET support fields into one. */
|
|
#define IEEE802154_HW_ARET (IEEE802154_HW_CSMA | \
|
|
IEEE802154_HW_FRAME_RETRIES)
|
|
|
|
/* struct ieee802154_ops - callbacks from mac802154 to the driver
|
|
*
|
|
* This structure contains various callbacks that the driver may
|
|
* handle or, in some cases, must handle, for example to transmit
|
|
* a frame.
|
|
*
|
|
* start: Handler that 802.15.4 module calls for device initialization.
|
|
* This function is called before the first interface is attached.
|
|
*
|
|
* stop: Handler that 802.15.4 module calls for device cleanup.
|
|
* This function is called after the last interface is removed.
|
|
*
|
|
* xmit_sync:
|
|
* Handler that 802.15.4 module calls for each transmitted frame.
|
|
* skb cntains the buffer starting from the IEEE 802.15.4 header.
|
|
* The low-level driver should send the frame based on available
|
|
* configuration. This is called by a workqueue and useful for
|
|
* synchronous 802.15.4 drivers.
|
|
* This function should return zero or negative errno.
|
|
*
|
|
* WARNING:
|
|
* This will be deprecated soon. We don't accept synced xmit callbacks
|
|
* drivers anymore.
|
|
*
|
|
* xmit_async:
|
|
* Handler that 802.15.4 module calls for each transmitted frame.
|
|
* skb cntains the buffer starting from the IEEE 802.15.4 header.
|
|
* The low-level driver should send the frame based on available
|
|
* configuration.
|
|
* This function should return zero or negative errno.
|
|
*
|
|
* ed: Handler that 802.15.4 module calls for Energy Detection.
|
|
* This function should place the value for detected energy
|
|
* (usually device-dependant) in the level pointer and return
|
|
* either zero or negative errno. Called with pib_lock held.
|
|
*
|
|
* set_channel:
|
|
* Set radio for listening on specific channel.
|
|
* Set the device for listening on specified channel.
|
|
* Returns either zero, or negative errno. Called with pib_lock held.
|
|
*
|
|
* set_hw_addr_filt:
|
|
* Set radio for listening on specific address.
|
|
* Set the device for listening on specified address.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_txpower:
|
|
* Set radio transmit power in dB. Called with pib_lock held.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_lbt
|
|
* Enables or disables listen before talk on the device. Called with
|
|
* pib_lock held.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_cca_mode
|
|
* Sets the CCA mode used by the device. Called with pib_lock held.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_cca_ed_level
|
|
* Sets the CCA energy detection threshold in dBm. Called with pib_lock
|
|
* held.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_csma_params
|
|
* Sets the CSMA parameter set for the PHY. Called with pib_lock held.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_frame_retries
|
|
* Sets the retransmission attempt limit. Called with pib_lock held.
|
|
* Returns either zero, or negative errno.
|
|
*
|
|
* set_promiscuous_mode
|
|
* Enables or disable promiscuous mode.
|
|
*/
|
|
struct ieee802154_ops {
|
|
struct module *owner;
|
|
int (*start)(struct ieee802154_hw *hw);
|
|
void (*stop)(struct ieee802154_hw *hw);
|
|
int (*xmit_sync)(struct ieee802154_hw *hw,
|
|
struct sk_buff *skb);
|
|
int (*xmit_async)(struct ieee802154_hw *hw,
|
|
struct sk_buff *skb);
|
|
int (*ed)(struct ieee802154_hw *hw, u8 *level);
|
|
int (*set_channel)(struct ieee802154_hw *hw, u8 page,
|
|
u8 channel);
|
|
int (*set_hw_addr_filt)(struct ieee802154_hw *hw,
|
|
struct ieee802154_hw_addr_filt *filt,
|
|
unsigned long changed);
|
|
int (*set_txpower)(struct ieee802154_hw *hw, int db);
|
|
int (*set_lbt)(struct ieee802154_hw *hw, bool on);
|
|
int (*set_cca_mode)(struct ieee802154_hw *hw, u8 mode);
|
|
int (*set_cca_ed_level)(struct ieee802154_hw *hw,
|
|
s32 level);
|
|
int (*set_csma_params)(struct ieee802154_hw *hw,
|
|
u8 min_be, u8 max_be, u8 retries);
|
|
int (*set_frame_retries)(struct ieee802154_hw *hw,
|
|
s8 retries);
|
|
int (*set_promiscuous_mode)(struct ieee802154_hw *hw,
|
|
const bool on);
|
|
};
|
|
|
|
/**
|
|
* ieee802154_be64_to_le64 - copies and convert be64 to le64
|
|
* @le64_dst: le64 destination pointer
|
|
* @be64_src: be64 source pointer
|
|
*/
|
|
static inline void ieee802154_be64_to_le64(void *le64_dst, const void *be64_src)
|
|
{
|
|
__le64 tmp = (__force __le64)swab64p(be64_src);
|
|
|
|
memcpy(le64_dst, &tmp, IEEE802154_EXTENDED_ADDR_LEN);
|
|
}
|
|
|
|
/**
|
|
* ieee802154_le64_to_be64 - copies and convert le64 to be64
|
|
* @be64_dst: be64 destination pointer
|
|
* @le64_src: le64 source pointer
|
|
*/
|
|
static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src)
|
|
{
|
|
__be64 tmp = (__force __be64)swab64p(le64_src);
|
|
|
|
memcpy(be64_dst, &tmp, IEEE802154_EXTENDED_ADDR_LEN);
|
|
}
|
|
|
|
/* Basic interface to register ieee802154 hwice */
|
|
struct ieee802154_hw *
|
|
ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops);
|
|
void ieee802154_free_hw(struct ieee802154_hw *hw);
|
|
int ieee802154_register_hw(struct ieee802154_hw *hw);
|
|
void ieee802154_unregister_hw(struct ieee802154_hw *hw);
|
|
|
|
void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb);
|
|
void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb,
|
|
u8 lqi);
|
|
|
|
void ieee802154_wake_queue(struct ieee802154_hw *hw);
|
|
void ieee802154_stop_queue(struct ieee802154_hw *hw);
|
|
void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb);
|
|
|
|
#endif /* NET_MAC802154_H */
|