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EDIT: mac802154.h
/* * 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 <asm/unaligned.h> #include <net/af_ieee802154.h> #include <linux/ieee802154.h> #include <linux/skbuff.h> #include <net/cfg802154.h> /** * 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_get_fc_from_skb - get the frame control field from an skb * @skb: skb where the frame control field will be get from */ static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb) { __le16 fc; /* check if we can fc at skb_mac_header of sk buffer */ if (WARN_ON(!skb_mac_header_was_set(skb) || (skb_tail_pointer(skb) - skb_mac_header(skb)) < IEEE802154_FC_LEN)) return cpu_to_le16(0); memcpy(&fc, skb_mac_header(skb), IEEE802154_FC_LEN); return fc; } /** * ieee802154_skb_dst_pan - get the pointer to destination pan field * @fc: mac header frame control field * @skb: skb where the destination pan pointer will be get from */ static inline unsigned char *ieee802154_skb_dst_pan(__le16 fc, const struct sk_buff *skb) { unsigned char *dst_pan; switch (ieee802154_daddr_mode(fc)) { case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE): dst_pan = NULL; break; case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT): case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED): dst_pan = skb_mac_header(skb) + IEEE802154_FC_LEN + IEEE802154_SEQ_LEN; break; default: WARN_ONCE(1, "invalid addr mode detected"); dst_pan = NULL; break; } return dst_pan; } /** * ieee802154_skb_src_pan - get the pointer to source pan field * @fc: mac header frame control field * @skb: skb where the source pan pointer will be get from */ static inline unsigned char *ieee802154_skb_src_pan(__le16 fc, const struct sk_buff *skb) { unsigned char *src_pan; switch (ieee802154_saddr_mode(fc)) { case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE): src_pan = NULL; break; case cpu_to_le16(IEEE802154_FCTL_SADDR_SHORT): case cpu_to_le16(IEEE802154_FCTL_SADDR_EXTENDED): /* if intra-pan and source addr mode is non none, * then source pan id is equal destination pan id. */ if (ieee802154_is_intra_pan(fc)) { src_pan = ieee802154_skb_dst_pan(fc, skb); break; } switch (ieee802154_daddr_mode(fc)) { case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE): src_pan = skb_mac_header(skb) + IEEE802154_FC_LEN + IEEE802154_SEQ_LEN; break; case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT): src_pan = skb_mac_header(skb) + IEEE802154_FC_LEN + IEEE802154_SEQ_LEN + IEEE802154_PAN_ID_LEN + IEEE802154_SHORT_ADDR_LEN; break; case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED): src_pan = skb_mac_header(skb) + IEEE802154_FC_LEN + IEEE802154_SEQ_LEN + IEEE802154_PAN_ID_LEN + IEEE802154_EXTENDED_ADDR_LEN; break; default: WARN_ONCE(1, "invalid addr mode detected"); src_pan = NULL; break; } break; default: WARN_ONCE(1, "invalid addr mode detected"); src_pan = NULL; break; } return src_pan; } /** * ieee802154_skb_is_intra_pan_addressing - checks whenever the mac addressing * is an intra pan communication * @fc: mac header frame control field * @skb: skb where the source and destination pan should be get from */ static inline bool ieee802154_skb_is_intra_pan_addressing(__le16 fc, const struct sk_buff *skb) { unsigned char *dst_pan = ieee802154_skb_dst_pan(fc, skb), *src_pan = ieee802154_skb_src_pan(fc, skb); /* if one is NULL is no intra pan addressing */ if (!dst_pan || !src_pan) return false; return !memcmp(dst_pan, src_pan, IEEE802154_PAN_ID_LEN); } /** * 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_le64(get_unaligned_be64(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_be64(get_unaligned_le64(le64_src), be64_dst); } /** * ieee802154_le16_to_be16 - copies and convert le16 to be16 * @be16_dst: be16 destination pointer * @le16_src: le16 source pointer */ static inline void ieee802154_le16_to_be16(void *be16_dst, const void *le16_src) { put_unaligned_be16(get_unaligned_le16(le16_src), be16_dst); } /** * ieee802154_be16_to_le16 - copies and convert be16 to le16 * @le16_dst: le16 destination pointer * @be16_src: be16 source pointer */ static inline void ieee802154_be16_to_le16(void *le16_dst, const void *be16_src) { put_unaligned_le16(get_unaligned_be16(be16_src), le16_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 */