1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * IEEE802.15.4-2003 specification
5 * Copyright (C) 2007-2012 Siemens AG
7 #ifndef NET_MAC802154_H
8 #define NET_MAC802154_H
10 #include <asm/unaligned.h>
11 #include <net/af_ieee802154.h>
12 #include <linux/ieee802154.h>
13 #include <linux/skbuff.h>
15 #include <net/cfg802154.h>
18 * enum ieee802154_hw_addr_filt_flags - hardware address filtering flags
20 * The following flags are used to indicate changed address settings from
21 * the stack to the hardware.
23 * @IEEE802154_AFILT_SADDR_CHANGED: Indicates that the short address will be
26 * @IEEE802154_AFILT_IEEEADDR_CHANGED: Indicates that the extended address
29 * @IEEE802154_AFILT_PANID_CHANGED: Indicates that the pan id will be change.
31 * @IEEE802154_AFILT_PANC_CHANGED: Indicates that the address filter will
32 * do frame address filtering as a pan coordinator.
34 enum ieee802154_hw_addr_filt_flags {
35 IEEE802154_AFILT_SADDR_CHANGED = BIT(0),
36 IEEE802154_AFILT_IEEEADDR_CHANGED = BIT(1),
37 IEEE802154_AFILT_PANID_CHANGED = BIT(2),
38 IEEE802154_AFILT_PANC_CHANGED = BIT(3),
42 * struct ieee802154_hw_addr_filt - hardware address filtering settings
44 * @pan_id: pan_id which should be set to the hardware address filter.
46 * @short_addr: short_addr which should be set to the hardware address filter.
48 * @ieee_addr: extended address which should be set to the hardware address
51 * @pan_coord: boolean if hardware filtering should be operate as coordinator.
53 struct ieee802154_hw_addr_filt {
61 * struct ieee802154_hw - ieee802154 hardware
63 * @extra_tx_headroom: headroom to reserve in each transmit skb for use by the
64 * driver (e.g. for transmit headers.)
66 * @flags: hardware flags, see &enum ieee802154_hw_flags
68 * @parent: parent device of the hardware.
70 * @priv: pointer to private area that was allocated for driver use along with
73 * @phy: This points to the &struct wpan_phy allocated for this 802.15.4 PHY.
75 struct ieee802154_hw {
76 /* filled by the driver */
77 int extra_tx_headroom;
79 struct device *parent;
82 /* filled by mac802154 core */
87 * enum ieee802154_hw_flags - hardware flags
89 * These flags are used to indicate hardware capabilities to
90 * the stack. Generally, flags here should have their meaning
91 * done in a way that the simplest hardware doesn't need setting
92 * any particular flags. There are some exceptions to this rule,
93 * however, so you are advised to review these flags carefully.
95 * @IEEE802154_HW_TX_OMIT_CKSUM: Indicates that xmitter will add FCS on it's
98 * @IEEE802154_HW_LBT: Indicates that transceiver will support listen before
101 * @IEEE802154_HW_CSMA_PARAMS: Indicates that transceiver will support csma
102 * parameters (max_be, min_be, backoff exponents).
104 * @IEEE802154_HW_FRAME_RETRIES: Indicates that transceiver will support ARET
105 * frame retries setting.
107 * @IEEE802154_HW_AFILT: Indicates that transceiver will support hardware
108 * address filter setting.
110 * @IEEE802154_HW_PROMISCUOUS: Indicates that transceiver will support
111 * promiscuous mode setting.
113 * @IEEE802154_HW_RX_OMIT_CKSUM: Indicates that receiver omits FCS.
115 * @IEEE802154_HW_RX_DROP_BAD_CKSUM: Indicates that receiver will not filter
116 * frames with bad checksum.
118 enum ieee802154_hw_flags {
119 IEEE802154_HW_TX_OMIT_CKSUM = BIT(0),
120 IEEE802154_HW_LBT = BIT(1),
121 IEEE802154_HW_CSMA_PARAMS = BIT(2),
122 IEEE802154_HW_FRAME_RETRIES = BIT(3),
123 IEEE802154_HW_AFILT = BIT(4),
124 IEEE802154_HW_PROMISCUOUS = BIT(5),
125 IEEE802154_HW_RX_OMIT_CKSUM = BIT(6),
126 IEEE802154_HW_RX_DROP_BAD_CKSUM = BIT(7),
129 /* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */
130 #define IEEE802154_HW_OMIT_CKSUM (IEEE802154_HW_TX_OMIT_CKSUM | \
131 IEEE802154_HW_RX_OMIT_CKSUM)
133 /* struct ieee802154_ops - callbacks from mac802154 to the driver
135 * This structure contains various callbacks that the driver may
136 * handle or, in some cases, must handle, for example to transmit
139 * start: Handler that 802.15.4 module calls for device initialization.
140 * This function is called before the first interface is attached.
142 * stop: Handler that 802.15.4 module calls for device cleanup.
143 * This function is called after the last interface is removed.
146 * Handler that 802.15.4 module calls for each transmitted frame.
147 * skb cntains the buffer starting from the IEEE 802.15.4 header.
148 * The low-level driver should send the frame based on available
149 * configuration. This is called by a workqueue and useful for
150 * synchronous 802.15.4 drivers.
151 * This function should return zero or negative errno.
154 * This will be deprecated soon. We don't accept synced xmit callbacks
158 * Handler that 802.15.4 module calls for each transmitted frame.
159 * skb cntains the buffer starting from the IEEE 802.15.4 header.
160 * The low-level driver should send the frame based on available
162 * This function should return zero or negative errno.
164 * ed: Handler that 802.15.4 module calls for Energy Detection.
165 * This function should place the value for detected energy
166 * (usually device-dependant) in the level pointer and return
167 * either zero or negative errno. Called with pib_lock held.
170 * Set radio for listening on specific channel.
171 * Set the device for listening on specified channel.
172 * Returns either zero, or negative errno. Called with pib_lock held.
175 * Set radio for listening on specific address.
176 * Set the device for listening on specified address.
177 * Returns either zero, or negative errno.
180 * Set radio transmit power in mBm. Called with pib_lock held.
181 * Returns either zero, or negative errno.
184 * Enables or disables listen before talk on the device. Called with
186 * Returns either zero, or negative errno.
189 * Sets the CCA mode used by the device. Called with pib_lock held.
190 * Returns either zero, or negative errno.
193 * Sets the CCA energy detection threshold in mBm. Called with pib_lock
195 * Returns either zero, or negative errno.
198 * Sets the CSMA parameter set for the PHY. Called with pib_lock held.
199 * Returns either zero, or negative errno.
202 * Sets the retransmission attempt limit. Called with pib_lock held.
203 * Returns either zero, or negative errno.
205 * set_promiscuous_mode
206 * Enables or disable promiscuous mode.
208 struct ieee802154_ops {
209 struct module *owner;
210 int (*start)(struct ieee802154_hw *hw);
211 void (*stop)(struct ieee802154_hw *hw);
212 int (*xmit_sync)(struct ieee802154_hw *hw,
213 struct sk_buff *skb);
214 int (*xmit_async)(struct ieee802154_hw *hw,
215 struct sk_buff *skb);
216 int (*ed)(struct ieee802154_hw *hw, u8 *level);
217 int (*set_channel)(struct ieee802154_hw *hw, u8 page,
219 int (*set_hw_addr_filt)(struct ieee802154_hw *hw,
220 struct ieee802154_hw_addr_filt *filt,
221 unsigned long changed);
222 int (*set_txpower)(struct ieee802154_hw *hw, s32 mbm);
223 int (*set_lbt)(struct ieee802154_hw *hw, bool on);
224 int (*set_cca_mode)(struct ieee802154_hw *hw,
225 const struct wpan_phy_cca *cca);
226 int (*set_cca_ed_level)(struct ieee802154_hw *hw, s32 mbm);
227 int (*set_csma_params)(struct ieee802154_hw *hw,
228 u8 min_be, u8 max_be, u8 retries);
229 int (*set_frame_retries)(struct ieee802154_hw *hw,
231 int (*set_promiscuous_mode)(struct ieee802154_hw *hw,
236 * ieee802154_get_fc_from_skb - get the frame control field from an skb
237 * @skb: skb where the frame control field will be get from
239 static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb)
243 /* check if we can fc at skb_mac_header of sk buffer */
244 if (WARN_ON(!skb_mac_header_was_set(skb) ||
245 (skb_tail_pointer(skb) -
246 skb_mac_header(skb)) < IEEE802154_FC_LEN))
247 return cpu_to_le16(0);
249 memcpy(&fc, skb_mac_header(skb), IEEE802154_FC_LEN);
254 * ieee802154_skb_dst_pan - get the pointer to destination pan field
255 * @fc: mac header frame control field
256 * @skb: skb where the destination pan pointer will be get from
258 static inline unsigned char *ieee802154_skb_dst_pan(__le16 fc,
259 const struct sk_buff *skb)
261 unsigned char *dst_pan;
263 switch (ieee802154_daddr_mode(fc)) {
264 case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
267 case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT):
268 case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED):
269 dst_pan = skb_mac_header(skb) +
274 WARN_ONCE(1, "invalid addr mode detected");
283 * ieee802154_skb_src_pan - get the pointer to source pan field
284 * @fc: mac header frame control field
285 * @skb: skb where the source pan pointer will be get from
287 static inline unsigned char *ieee802154_skb_src_pan(__le16 fc,
288 const struct sk_buff *skb)
290 unsigned char *src_pan;
292 switch (ieee802154_saddr_mode(fc)) {
293 case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
296 case cpu_to_le16(IEEE802154_FCTL_SADDR_SHORT):
297 case cpu_to_le16(IEEE802154_FCTL_SADDR_EXTENDED):
298 /* if intra-pan and source addr mode is non none,
299 * then source pan id is equal destination pan id.
301 if (ieee802154_is_intra_pan(fc)) {
302 src_pan = ieee802154_skb_dst_pan(fc, skb);
306 switch (ieee802154_daddr_mode(fc)) {
307 case cpu_to_le16(IEEE802154_FCTL_ADDR_NONE):
308 src_pan = skb_mac_header(skb) +
312 case cpu_to_le16(IEEE802154_FCTL_DADDR_SHORT):
313 src_pan = skb_mac_header(skb) +
316 IEEE802154_PAN_ID_LEN +
317 IEEE802154_SHORT_ADDR_LEN;
319 case cpu_to_le16(IEEE802154_FCTL_DADDR_EXTENDED):
320 src_pan = skb_mac_header(skb) +
323 IEEE802154_PAN_ID_LEN +
324 IEEE802154_EXTENDED_ADDR_LEN;
327 WARN_ONCE(1, "invalid addr mode detected");
333 WARN_ONCE(1, "invalid addr mode detected");
342 * ieee802154_skb_is_intra_pan_addressing - checks whenever the mac addressing
343 * is an intra pan communication
344 * @fc: mac header frame control field
345 * @skb: skb where the source and destination pan should be get from
347 static inline bool ieee802154_skb_is_intra_pan_addressing(__le16 fc,
348 const struct sk_buff *skb)
350 unsigned char *dst_pan = ieee802154_skb_dst_pan(fc, skb),
351 *src_pan = ieee802154_skb_src_pan(fc, skb);
353 /* if one is NULL is no intra pan addressing */
354 if (!dst_pan || !src_pan)
357 return !memcmp(dst_pan, src_pan, IEEE802154_PAN_ID_LEN);
361 * ieee802154_be64_to_le64 - copies and convert be64 to le64
362 * @le64_dst: le64 destination pointer
363 * @be64_src: be64 source pointer
365 static inline void ieee802154_be64_to_le64(void *le64_dst, const void *be64_src)
367 put_unaligned_le64(get_unaligned_be64(be64_src), le64_dst);
371 * ieee802154_le64_to_be64 - copies and convert le64 to be64
372 * @be64_dst: be64 destination pointer
373 * @le64_src: le64 source pointer
375 static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src)
377 put_unaligned_be64(get_unaligned_le64(le64_src), be64_dst);
381 * ieee802154_le16_to_be16 - copies and convert le16 to be16
382 * @be16_dst: be16 destination pointer
383 * @le16_src: le16 source pointer
385 static inline void ieee802154_le16_to_be16(void *be16_dst, const void *le16_src)
387 put_unaligned_be16(get_unaligned_le16(le16_src), be16_dst);
391 * ieee802154_be16_to_le16 - copies and convert be16 to le16
392 * @le16_dst: le16 destination pointer
393 * @be16_src: be16 source pointer
395 static inline void ieee802154_be16_to_le16(void *le16_dst, const void *be16_src)
397 put_unaligned_le16(get_unaligned_be16(be16_src), le16_dst);
401 * ieee802154_alloc_hw - Allocate a new hardware device
403 * This must be called once for each hardware device. The returned pointer
404 * must be used to refer to this device when calling other functions.
405 * mac802154 allocates a private data area for the driver pointed to by
406 * @priv in &struct ieee802154_hw, the size of this area is given as
409 * @priv_data_len: length of private data
410 * @ops: callbacks for this device
412 * Return: A pointer to the new hardware device, or %NULL on error.
414 struct ieee802154_hw *
415 ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops);
418 * ieee802154_free_hw - free hardware descriptor
420 * This function frees everything that was allocated, including the
421 * private data for the driver. You must call ieee802154_unregister_hw()
422 * before calling this function.
424 * @hw: the hardware to free
426 void ieee802154_free_hw(struct ieee802154_hw *hw);
429 * ieee802154_register_hw - Register hardware device
431 * You must call this function before any other functions in
432 * mac802154. Note that before a hardware can be registered, you
433 * need to fill the contained wpan_phy's information.
435 * @hw: the device to register as returned by ieee802154_alloc_hw()
437 * Return: 0 on success. An error code otherwise.
439 int ieee802154_register_hw(struct ieee802154_hw *hw);
442 * ieee802154_unregister_hw - Unregister a hardware device
444 * This function instructs mac802154 to free allocated resources
445 * and unregister netdevices from the networking subsystem.
447 * @hw: the hardware to unregister
449 void ieee802154_unregister_hw(struct ieee802154_hw *hw);
452 * ieee802154_rx_irqsafe - receive frame
454 * Like ieee802154_rx() but can be called in IRQ context
455 * (internally defers to a tasklet.)
457 * @hw: the hardware this frame came in on
458 * @skb: the buffer to receive, owned by mac802154 after this call
459 * @lqi: link quality indicator
461 void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb,
464 * ieee802154_wake_queue - wake ieee802154 queue
465 * @hw: pointer as obtained from ieee802154_alloc_hw().
467 * Drivers should use this function instead of netif_wake_queue.
469 void ieee802154_wake_queue(struct ieee802154_hw *hw);
472 * ieee802154_stop_queue - stop ieee802154 queue
473 * @hw: pointer as obtained from ieee802154_alloc_hw().
475 * Drivers should use this function instead of netif_stop_queue.
477 void ieee802154_stop_queue(struct ieee802154_hw *hw);
480 * ieee802154_xmit_complete - frame transmission complete
482 * @hw: pointer as obtained from ieee802154_alloc_hw().
483 * @skb: buffer for transmission
484 * @ifs_handling: indicate interframe space handling
486 void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
489 #endif /* NET_MAC802154_H */