2 * IEEE802.15.4-2003 specification
4 * Copyright (C) 2007-2012 Siemens AG
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
16 #ifndef NET_MAC802154_H
17 #define NET_MAC802154_H
19 #include <net/af_ieee802154.h>
20 #include <linux/ieee802154.h>
21 #include <linux/skbuff.h>
22 #include <linux/unaligned/memmove.h>
24 #include <net/cfg802154.h>
26 /* General MAC frame format:
27 * 2 bytes: Frame Control
28 * 1 byte: Sequence Number
29 * 20 bytes: Addressing fields
30 * 14 bytes: Auxiliary Security Header
32 #define MAC802154_FRAME_HARD_HEADER_LEN (2 + 1 + 20 + 14)
35 * enum ieee802154_hw_addr_filt_flags - hardware address filtering flags
37 * The following flags are used to indicate changed address settings from
38 * the stack to the hardware.
40 * @IEEE802154_AFILT_SADDR_CHANGED: Indicates that the short address will be
43 * @IEEE802154_AFILT_IEEEADDR_CHANGED: Indicates that the extended address
46 * @IEEE802154_AFILT_PANID_CHANGED: Indicates that the pan id will be change.
48 * @IEEE802154_AFILT_PANC_CHANGED: Indicates that the address filter will
49 * do frame address filtering as a pan coordinator.
51 enum ieee802154_hw_addr_filt_flags {
52 IEEE802154_AFILT_SADDR_CHANGED = BIT(1),
53 IEEE802154_AFILT_IEEEADDR_CHANGED = BIT(2),
54 IEEE802154_AFILT_PANID_CHANGED = BIT(3),
55 IEEE802154_AFILT_PANC_CHANGED = BIT(4),
58 struct ieee802154_hw_addr_filt {
59 __le16 pan_id; /* Each independent PAN selects a unique
60 * identifier. This PAN id allows communication
61 * between devices within a network using short
62 * addresses and enables transmissions between
63 * devices across independent networks.
70 struct ieee802154_hw {
71 /* filled by the driver */
72 int extra_tx_headroom;
74 struct device *parent;
76 /* filled by mac802154 core */
77 struct ieee802154_hw_addr_filt hw_filt;
82 /* Checksum is in hardware and is omitted from a packet
84 * These following flags are used to indicate hardware capabilities to
85 * the stack. Generally, flags here should have their meaning
86 * done in a way that the simplest hardware doesn't need setting
87 * any particular flags. There are some exceptions to this rule,
88 * however, so you are advised to review these flags carefully.
91 /* Indicates that xmitter will add FCS on it's own. */
92 #define IEEE802154_HW_TX_OMIT_CKSUM 0x00000001
93 /* Indicates that receiver will autorespond with ACK frames. */
94 #define IEEE802154_HW_AACK 0x00000002
95 /* Indicates that transceiver will support listen before transmit. */
96 #define IEEE802154_HW_LBT 0x00000004
97 /* Indicates that transceiver will support csma (max_be, min_be, csma retries)
99 #define IEEE802154_HW_CSMA_PARAMS 0x00000008
100 /* Indicates that transceiver will support ARET frame retries setting. */
101 #define IEEE802154_HW_FRAME_RETRIES 0x00000010
102 /* Indicates that transceiver will support hardware address filter setting. */
103 #define IEEE802154_HW_AFILT 0x00000020
104 /* Indicates that transceiver will support promiscuous mode setting. */
105 #define IEEE802154_HW_PROMISCUOUS 0x00000040
106 /* Indicates that receiver omits FCS. */
107 #define IEEE802154_HW_RX_OMIT_CKSUM 0x00000080
108 /* Indicates that receiver will not filter frames with bad checksum. */
109 #define IEEE802154_HW_RX_DROP_BAD_CKSUM 0x00000100
111 /* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */
112 #define IEEE802154_HW_OMIT_CKSUM (IEEE802154_HW_TX_OMIT_CKSUM | \
113 IEEE802154_HW_RX_OMIT_CKSUM)
115 /* struct ieee802154_ops - callbacks from mac802154 to the driver
117 * This structure contains various callbacks that the driver may
118 * handle or, in some cases, must handle, for example to transmit
121 * start: Handler that 802.15.4 module calls for device initialization.
122 * This function is called before the first interface is attached.
124 * stop: Handler that 802.15.4 module calls for device cleanup.
125 * This function is called after the last interface is removed.
128 * Handler that 802.15.4 module calls for each transmitted frame.
129 * skb cntains the buffer starting from the IEEE 802.15.4 header.
130 * The low-level driver should send the frame based on available
131 * configuration. This is called by a workqueue and useful for
132 * synchronous 802.15.4 drivers.
133 * This function should return zero or negative errno.
136 * This will be deprecated soon. We don't accept synced xmit callbacks
140 * Handler that 802.15.4 module calls for each transmitted frame.
141 * skb cntains the buffer starting from the IEEE 802.15.4 header.
142 * The low-level driver should send the frame based on available
144 * This function should return zero or negative errno.
146 * ed: Handler that 802.15.4 module calls for Energy Detection.
147 * This function should place the value for detected energy
148 * (usually device-dependant) in the level pointer and return
149 * either zero or negative errno. Called with pib_lock held.
152 * Set radio for listening on specific channel.
153 * Set the device for listening on specified channel.
154 * Returns either zero, or negative errno. Called with pib_lock held.
157 * Set radio for listening on specific address.
158 * Set the device for listening on specified address.
159 * Returns either zero, or negative errno.
162 * Set radio transmit power in mBm. Called with pib_lock held.
163 * Returns either zero, or negative errno.
166 * Enables or disables listen before talk on the device. Called with
168 * Returns either zero, or negative errno.
171 * Sets the CCA mode used by the device. Called with pib_lock held.
172 * Returns either zero, or negative errno.
175 * Sets the CCA energy detection threshold in mBm. Called with pib_lock
177 * Returns either zero, or negative errno.
180 * Sets the CSMA parameter set for the PHY. Called with pib_lock held.
181 * Returns either zero, or negative errno.
184 * Sets the retransmission attempt limit. Called with pib_lock held.
185 * Returns either zero, or negative errno.
187 * set_promiscuous_mode
188 * Enables or disable promiscuous mode.
190 struct ieee802154_ops {
191 struct module *owner;
192 int (*start)(struct ieee802154_hw *hw);
193 void (*stop)(struct ieee802154_hw *hw);
194 int (*xmit_sync)(struct ieee802154_hw *hw,
195 struct sk_buff *skb);
196 int (*xmit_async)(struct ieee802154_hw *hw,
197 struct sk_buff *skb);
198 int (*ed)(struct ieee802154_hw *hw, u8 *level);
199 int (*set_channel)(struct ieee802154_hw *hw, u8 page,
201 int (*set_hw_addr_filt)(struct ieee802154_hw *hw,
202 struct ieee802154_hw_addr_filt *filt,
203 unsigned long changed);
204 int (*set_txpower)(struct ieee802154_hw *hw, s32 mbm);
205 int (*set_lbt)(struct ieee802154_hw *hw, bool on);
206 int (*set_cca_mode)(struct ieee802154_hw *hw,
207 const struct wpan_phy_cca *cca);
208 int (*set_cca_ed_level)(struct ieee802154_hw *hw, s32 mbm);
209 int (*set_csma_params)(struct ieee802154_hw *hw,
210 u8 min_be, u8 max_be, u8 retries);
211 int (*set_frame_retries)(struct ieee802154_hw *hw,
213 int (*set_promiscuous_mode)(struct ieee802154_hw *hw,
218 * ieee802154_be64_to_le64 - copies and convert be64 to le64
219 * @le64_dst: le64 destination pointer
220 * @be64_src: be64 source pointer
222 static inline void ieee802154_be64_to_le64(void *le64_dst, const void *be64_src)
224 __put_unaligned_memmove64(swab64p(be64_src), le64_dst);
228 * ieee802154_le64_to_be64 - copies and convert le64 to be64
229 * @be64_dst: be64 destination pointer
230 * @le64_src: le64 source pointer
232 static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src)
234 __put_unaligned_memmove64(swab64p(le64_src), be64_dst);
238 * ieee802154_alloc_hw - Allocate a new hardware device
240 * This must be called once for each hardware device. The returned pointer
241 * must be used to refer to this device when calling other functions.
242 * mac802154 allocates a private data area for the driver pointed to by
243 * @priv in &struct ieee802154_hw, the size of this area is given as
246 * @priv_data_len: length of private data
247 * @ops: callbacks for this device
249 * Return: A pointer to the new hardware device, or %NULL on error.
251 struct ieee802154_hw *
252 ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops);
255 * ieee802154_free_hw - free hardware descriptor
257 * This function frees everything that was allocated, including the
258 * private data for the driver. You must call ieee802154_unregister_hw()
259 * before calling this function.
261 * @hw: the hardware to free
263 void ieee802154_free_hw(struct ieee802154_hw *hw);
266 * ieee802154_register_hw - Register hardware device
268 * You must call this function before any other functions in
269 * mac802154. Note that before a hardware can be registered, you
270 * need to fill the contained wpan_phy's information.
272 * @hw: the device to register as returned by ieee802154_alloc_hw()
274 * Return: 0 on success. An error code otherwise.
276 int ieee802154_register_hw(struct ieee802154_hw *hw);
279 * ieee802154_unregister_hw - Unregister a hardware device
281 * This function instructs mac802154 to free allocated resources
282 * and unregister netdevices from the networking subsystem.
284 * @hw: the hardware to unregister
286 void ieee802154_unregister_hw(struct ieee802154_hw *hw);
289 * ieee802154_rx - receive frame
291 * Use this function to hand received frames to mac802154. The receive
292 * buffer in @skb must start with an IEEE 802.15.4 header. In case of a
293 * paged @skb is used, the driver is recommended to put the ieee802154
294 * header of the frame on the linear part of the @skb to avoid memory
295 * allocation and/or memcpy by the stack.
297 * This function may not be called in IRQ context. Calls to this function
298 * for a single hardware must be synchronized against each other.
300 * @hw: the hardware this frame came in on
301 * @skb: the buffer to receive, owned by mac802154 after this call
303 void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb);
306 * ieee802154_rx_irqsafe - receive frame
308 * Like ieee802154_rx() but can be called in IRQ context
309 * (internally defers to a tasklet.)
311 * @hw: the hardware this frame came in on
312 * @skb: the buffer to receive, owned by mac802154 after this call
313 * @lqi: link quality indicator
315 void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb,
318 * ieee802154_wake_queue - wake ieee802154 queue
319 * @hw: pointer as obtained from ieee802154_alloc_hw().
321 * Drivers should use this function instead of netif_wake_queue.
323 void ieee802154_wake_queue(struct ieee802154_hw *hw);
326 * ieee802154_stop_queue - stop ieee802154 queue
327 * @hw: pointer as obtained from ieee802154_alloc_hw().
329 * Drivers should use this function instead of netif_stop_queue.
331 void ieee802154_stop_queue(struct ieee802154_hw *hw);
334 * ieee802154_xmit_complete - frame transmission complete
336 * @hw: pointer as obtained from ieee802154_alloc_hw().
337 * @skb: buffer for transmission
338 * @ifs_handling: indicate interframe space handling
340 void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb,
343 #endif /* NET_MAC802154_H */