362 lines
12 KiB
C
362 lines
12 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>
|
|
#include <linux/unaligned/memmove.h>
|
|
|
|
#include <net/cfg802154.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)
|
|
|
|
/**
|
|
* enum ieee802154_hw_addr_filt_flags - hardware address filtering flags
|
|
*
|
|
* The following flags are used to indicate changed address settings from
|
|
* the stack to the hardware.
|
|
*
|
|
* @IEEE802154_AFILT_SADDR_CHANGED: Indicates that the short address will be
|
|
* change.
|
|
*
|
|
* @IEEE802154_AFILT_IEEEADDR_CHANGED: Indicates that the extended address
|
|
* will be change.
|
|
*
|
|
* @IEEE802154_AFILT_PANID_CHANGED: Indicates that the pan id will be change.
|
|
*
|
|
* @IEEE802154_AFILT_PANC_CHANGED: Indicates that the address filter will
|
|
* do frame address filtering as a pan coordinator.
|
|
*/
|
|
enum ieee802154_hw_addr_filt_flags {
|
|
IEEE802154_AFILT_SADDR_CHANGED = BIT(0),
|
|
IEEE802154_AFILT_IEEEADDR_CHANGED = BIT(1),
|
|
IEEE802154_AFILT_PANID_CHANGED = BIT(2),
|
|
IEEE802154_AFILT_PANC_CHANGED = BIT(3),
|
|
};
|
|
|
|
/**
|
|
* struct ieee802154_hw_addr_filt - hardware address filtering settings
|
|
*
|
|
* @pan_id: pan_id which should be set to the hardware address filter.
|
|
*
|
|
* @short_addr: short_addr which should be set to the hardware address filter.
|
|
*
|
|
* @ieee_addr: extended address which should be set to the hardware address
|
|
* filter.
|
|
*
|
|
* @pan_coord: boolean if hardware filtering should be operate as coordinator.
|
|
*/
|
|
struct ieee802154_hw_addr_filt {
|
|
__le16 pan_id;
|
|
__le16 short_addr;
|
|
__le64 ieee_addr;
|
|
bool pan_coord;
|
|
};
|
|
|
|
/**
|
|
* struct ieee802154_hw - ieee802154 hardware
|
|
*
|
|
* @extra_tx_headroom: headroom to reserve in each transmit skb for use by the
|
|
* driver (e.g. for transmit headers.)
|
|
*
|
|
* @flags: hardware flags, see &enum ieee802154_hw_flags
|
|
*
|
|
* @parent: parent device of the hardware.
|
|
*
|
|
* @priv: pointer to private area that was allocated for driver use along with
|
|
* this structure.
|
|
*
|
|
* @phy: This points to the &struct wpan_phy allocated for this 802.15.4 PHY.
|
|
*/
|
|
struct ieee802154_hw {
|
|
/* filled by the driver */
|
|
int extra_tx_headroom;
|
|
u32 flags;
|
|
struct device *parent;
|
|
void *priv;
|
|
|
|
/* filled by mac802154 core */
|
|
struct wpan_phy *phy;
|
|
};
|
|
|
|
/**
|
|
* enum ieee802154_hw_flags - hardware flags
|
|
*
|
|
* These 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.
|
|
*
|
|
* @IEEE802154_HW_TX_OMIT_CKSUM: Indicates that xmitter will add FCS on it's
|
|
* own.
|
|
*
|
|
* @IEEE802154_HW_LBT: Indicates that transceiver will support listen before
|
|
* transmit.
|
|
*
|
|
* @IEEE802154_HW_CSMA_PARAMS: Indicates that transceiver will support csma
|
|
* parameters (max_be, min_be, backoff exponents).
|
|
*
|
|
* @IEEE802154_HW_FRAME_RETRIES: Indicates that transceiver will support ARET
|
|
* frame retries setting.
|
|
*
|
|
* @IEEE802154_HW_AFILT: Indicates that transceiver will support hardware
|
|
* address filter setting.
|
|
*
|
|
* @IEEE802154_HW_PROMISCUOUS: Indicates that transceiver will support
|
|
* promiscuous mode setting.
|
|
*
|
|
* @IEEE802154_HW_RX_OMIT_CKSUM: Indicates that receiver omits FCS.
|
|
*
|
|
* @IEEE802154_HW_RX_DROP_BAD_CKSUM: Indicates that receiver will not filter
|
|
* frames with bad checksum.
|
|
*/
|
|
enum ieee802154_hw_flags {
|
|
IEEE802154_HW_TX_OMIT_CKSUM = BIT(0),
|
|
IEEE802154_HW_LBT = BIT(1),
|
|
IEEE802154_HW_CSMA_PARAMS = BIT(2),
|
|
IEEE802154_HW_FRAME_RETRIES = BIT(3),
|
|
IEEE802154_HW_AFILT = BIT(4),
|
|
IEEE802154_HW_PROMISCUOUS = BIT(5),
|
|
IEEE802154_HW_RX_OMIT_CKSUM = BIT(6),
|
|
IEEE802154_HW_RX_DROP_BAD_CKSUM = BIT(7),
|
|
};
|
|
|
|
/* 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)
|
|
|
|
/* 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 mBm. 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 mBm. 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, s32 mbm);
|
|
int (*set_lbt)(struct ieee802154_hw *hw, bool on);
|
|
int (*set_cca_mode)(struct ieee802154_hw *hw,
|
|
const struct wpan_phy_cca *cca);
|
|
int (*set_cca_ed_level)(struct ieee802154_hw *hw, s32 mbm);
|
|
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)
|
|
{
|
|
__put_unaligned_memmove64(swab64p(be64_src), le64_dst);
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
__put_unaligned_memmove64(swab64p(le64_src), be64_dst);
|
|
}
|
|
|
|
/**
|
|
* ieee802154_alloc_hw - Allocate a new hardware device
|
|
*
|
|
* This must be called once for each hardware device. The returned pointer
|
|
* must be used to refer to this device when calling other functions.
|
|
* mac802154 allocates a private data area for the driver pointed to by
|
|
* @priv in &struct ieee802154_hw, the size of this area is given as
|
|
* @priv_data_len.
|
|
*
|
|
* @priv_data_len: length of private data
|
|
* @ops: callbacks for this device
|
|
*
|
|
* Return: A pointer to the new hardware device, or %NULL on error.
|
|
*/
|
|
struct ieee802154_hw *
|
|
ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops);
|
|
|
|
/**
|
|
* ieee802154_free_hw - free hardware descriptor
|
|
*
|
|
* This function frees everything that was allocated, including the
|
|
* private data for the driver. You must call ieee802154_unregister_hw()
|
|
* before calling this function.
|
|
*
|
|
* @hw: the hardware to free
|
|
*/
|
|
void ieee802154_free_hw(struct ieee802154_hw *hw);
|
|
|
|
/**
|
|
* ieee802154_register_hw - Register hardware device
|
|
*
|
|
* You must call this function before any other functions in
|
|
* mac802154. Note that before a hardware can be registered, you
|
|
* need to fill the contained wpan_phy's information.
|
|
*
|
|
* @hw: the device to register as returned by ieee802154_alloc_hw()
|
|
*
|
|
* Return: 0 on success. An error code otherwise.
|
|
*/
|
|
int ieee802154_register_hw(struct ieee802154_hw *hw);
|
|
|
|
/**
|
|
* ieee802154_unregister_hw - Unregister a hardware device
|
|
*
|
|
* This function instructs mac802154 to free allocated resources
|
|
* and unregister netdevices from the networking subsystem.
|
|
*
|
|
* @hw: the hardware to unregister
|
|
*/
|
|
void ieee802154_unregister_hw(struct ieee802154_hw *hw);
|
|
|
|
/**
|
|
* ieee802154_rx_irqsafe - receive frame
|
|
*
|
|
* Like ieee802154_rx() but can be called in IRQ context
|
|
* (internally defers to a tasklet.)
|
|
*
|
|
* @hw: the hardware this frame came in on
|
|
* @skb: the buffer to receive, owned by mac802154 after this call
|
|
* @lqi: link quality indicator
|
|
*/
|
|
void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb,
|
|
u8 lqi);
|
|
/**
|
|
* ieee802154_wake_queue - wake ieee802154 queue
|
|
* @hw: pointer as obtained from ieee802154_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_wake_queue.
|
|
*/
|
|
void ieee802154_wake_queue(struct ieee802154_hw *hw);
|
|
|
|
/**
|
|
* ieee802154_stop_queue - stop ieee802154 queue
|
|
* @hw: pointer as obtained from ieee802154_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_stop_queue.
|
|
*/
|
|
void ieee802154_stop_queue(struct ieee802154_hw *hw);
|
|
|
|
/**
|
|
* ieee802154_xmit_complete - frame transmission complete
|
|
*
|
|
* @hw: pointer as obtained from ieee802154_alloc_hw().
|
|
* @skb: buffer for transmission
|
|
* @ifs_handling: indicate interframe space handling
|
|
*/
|
|
void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
|
|
bool ifs_handling);
|
|
|
|
#endif /* NET_MAC802154_H */
|