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0afd7ad9 | 1 | /* |
2 | * IEEE802.15.4-2003 specification | |
3 | * | |
4 | * Copyright (C) 2007-2012 Siemens AG | |
5 | * | |
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. | |
9 | * | |
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. | |
14 | * | |
0afd7ad9 | 15 | */ |
16 | #ifndef NET_MAC802154_H | |
17 | #define NET_MAC802154_H | |
18 | ||
19 | #include <net/af_ieee802154.h> | |
239a84a9 | 20 | #include <linux/ieee802154.h> |
94b4f6c2 | 21 | #include <linux/skbuff.h> |
ba5bf17e | 22 | #include <linux/unaligned/memmove.h> |
0afd7ad9 | 23 | |
7fe9a388 AA |
24 | #include <net/cfg802154.h> |
25 | ||
32bad7e3 | 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 | |
31 | */ | |
32 | #define MAC802154_FRAME_HARD_HEADER_LEN (2 + 1 + 20 + 14) | |
33 | ||
6b70a43c AA |
34 | /** |
35 | * enum ieee802154_hw_addr_filt_flags - hardware address filtering flags | |
36 | * | |
37 | * The following flags are used to indicate changed address settings from | |
0afd7ad9 | 38 | * the stack to the hardware. |
6b70a43c AA |
39 | * |
40 | * @IEEE802154_AFILT_SADDR_CHANGED: Indicates that the short address will be | |
41 | * change. | |
42 | * | |
43 | * @IEEE802154_AFILT_IEEEADDR_CHANGED: Indicates that the extended address | |
44 | * will be change. | |
45 | * | |
46 | * @IEEE802154_AFILT_PANID_CHANGED: Indicates that the pan id will be change. | |
47 | * | |
48 | * @IEEE802154_AFILT_PANC_CHANGED: Indicates that the address filter will | |
49 | * do frame address filtering as a pan coordinator. | |
0afd7ad9 | 50 | */ |
6b70a43c AA |
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), | |
56 | }; | |
0afd7ad9 | 57 | |
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. | |
64 | */ | |
65 | __le16 short_addr; | |
b70ab2e8 | 66 | __le64 ieee_addr; |
0afd7ad9 | 67 | u8 pan_coord; |
68 | }; | |
69 | ||
5a504397 | 70 | struct ieee802154_hw { |
0afd7ad9 | 71 | /* filled by the driver */ |
72 | int extra_tx_headroom; | |
73 | u32 flags; | |
74 | struct device *parent; | |
75 | ||
76 | /* filled by mac802154 core */ | |
77 | struct ieee802154_hw_addr_filt hw_filt; | |
78 | void *priv; | |
79 | struct wpan_phy *phy; | |
80 | }; | |
81 | ||
82 | /* Checksum is in hardware and is omitted from a packet | |
83 | * | |
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. | |
89 | */ | |
90 | ||
90386a7e AA |
91 | /* Indicates that xmitter will add FCS on it's own. */ |
92 | #define IEEE802154_HW_TX_OMIT_CKSUM 0x00000001 | |
640985ec | 93 | /* Indicates that transceiver will support listen before transmit. */ |
edea8f7c | 94 | #define IEEE802154_HW_LBT 0x00000004 |
640985ec AA |
95 | /* Indicates that transceiver will support csma (max_be, min_be, csma retries) |
96 | * settings. */ | |
edea8f7c | 97 | #define IEEE802154_HW_CSMA_PARAMS 0x00000008 |
640985ec | 98 | /* Indicates that transceiver will support ARET frame retries setting. */ |
edea8f7c | 99 | #define IEEE802154_HW_FRAME_RETRIES 0x00000010 |
c8fc84ed | 100 | /* Indicates that transceiver will support hardware address filter setting. */ |
edea8f7c | 101 | #define IEEE802154_HW_AFILT 0x00000020 |
94b79222 | 102 | /* Indicates that transceiver will support promiscuous mode setting. */ |
edea8f7c | 103 | #define IEEE802154_HW_PROMISCUOUS 0x00000040 |
90386a7e | 104 | /* Indicates that receiver omits FCS. */ |
edea8f7c | 105 | #define IEEE802154_HW_RX_OMIT_CKSUM 0x00000080 |
ec718f3d | 106 | /* Indicates that receiver will not filter frames with bad checksum. */ |
edea8f7c | 107 | #define IEEE802154_HW_RX_DROP_BAD_CKSUM 0x00000100 |
90386a7e AA |
108 | |
109 | /* Indicates that receiver omits FCS and xmitter will add FCS on it's own. */ | |
110 | #define IEEE802154_HW_OMIT_CKSUM (IEEE802154_HW_TX_OMIT_CKSUM | \ | |
111 | IEEE802154_HW_RX_OMIT_CKSUM) | |
640985ec | 112 | |
0afd7ad9 | 113 | /* struct ieee802154_ops - callbacks from mac802154 to the driver |
114 | * | |
115 | * This structure contains various callbacks that the driver may | |
116 | * handle or, in some cases, must handle, for example to transmit | |
117 | * a frame. | |
118 | * | |
119 | * start: Handler that 802.15.4 module calls for device initialization. | |
120 | * This function is called before the first interface is attached. | |
121 | * | |
122 | * stop: Handler that 802.15.4 module calls for device cleanup. | |
123 | * This function is called after the last interface is removed. | |
124 | * | |
ed0a5dce AA |
125 | * xmit_sync: |
126 | * Handler that 802.15.4 module calls for each transmitted frame. | |
127 | * skb cntains the buffer starting from the IEEE 802.15.4 header. | |
128 | * The low-level driver should send the frame based on available | |
129 | * configuration. This is called by a workqueue and useful for | |
130 | * synchronous 802.15.4 drivers. | |
131 | * This function should return zero or negative errno. | |
132 | * | |
1e7283a2 AA |
133 | * WARNING: |
134 | * This will be deprecated soon. We don't accept synced xmit callbacks | |
135 | * drivers anymore. | |
136 | * | |
ed0a5dce AA |
137 | * xmit_async: |
138 | * Handler that 802.15.4 module calls for each transmitted frame. | |
0afd7ad9 | 139 | * skb cntains the buffer starting from the IEEE 802.15.4 header. |
140 | * The low-level driver should send the frame based on available | |
141 | * configuration. | |
dc67c6b3 | 142 | * This function should return zero or negative errno. |
0afd7ad9 | 143 | * |
144 | * ed: Handler that 802.15.4 module calls for Energy Detection. | |
145 | * This function should place the value for detected energy | |
146 | * (usually device-dependant) in the level pointer and return | |
147 | * either zero or negative errno. Called with pib_lock held. | |
148 | * | |
149 | * set_channel: | |
150 | * Set radio for listening on specific channel. | |
151 | * Set the device for listening on specified channel. | |
152 | * Returns either zero, or negative errno. Called with pib_lock held. | |
153 | * | |
154 | * set_hw_addr_filt: | |
155 | * Set radio for listening on specific address. | |
156 | * Set the device for listening on specified address. | |
157 | * Returns either zero, or negative errno. | |
9b2777d6 PB |
158 | * |
159 | * set_txpower: | |
e2eb173a | 160 | * Set radio transmit power in mBm. Called with pib_lock held. |
9b2777d6 | 161 | * Returns either zero, or negative errno. |
84dda3c6 PB |
162 | * |
163 | * set_lbt | |
164 | * Enables or disables listen before talk on the device. Called with | |
165 | * pib_lock held. | |
166 | * Returns either zero, or negative errno. | |
ba08fea5 PB |
167 | * |
168 | * set_cca_mode | |
169 | * Sets the CCA mode used by the device. Called with pib_lock held. | |
170 | * Returns either zero, or negative errno. | |
6ca00197 PB |
171 | * |
172 | * set_cca_ed_level | |
32b23550 | 173 | * Sets the CCA energy detection threshold in mBm. Called with pib_lock |
6ca00197 PB |
174 | * held. |
175 | * Returns either zero, or negative errno. | |
4244db1b PB |
176 | * |
177 | * set_csma_params | |
178 | * Sets the CSMA parameter set for the PHY. Called with pib_lock held. | |
179 | * Returns either zero, or negative errno. | |
180 | * | |
181 | * set_frame_retries | |
182 | * Sets the retransmission attempt limit. Called with pib_lock held. | |
183 | * Returns either zero, or negative errno. | |
94b79222 AA |
184 | * |
185 | * set_promiscuous_mode | |
186 | * Enables or disable promiscuous mode. | |
0afd7ad9 | 187 | */ |
188 | struct ieee802154_ops { | |
189 | struct module *owner; | |
5a504397 AA |
190 | int (*start)(struct ieee802154_hw *hw); |
191 | void (*stop)(struct ieee802154_hw *hw); | |
ed0a5dce AA |
192 | int (*xmit_sync)(struct ieee802154_hw *hw, |
193 | struct sk_buff *skb); | |
194 | int (*xmit_async)(struct ieee802154_hw *hw, | |
195 | struct sk_buff *skb); | |
5a504397 | 196 | int (*ed)(struct ieee802154_hw *hw, u8 *level); |
e37d2ec8 AA |
197 | int (*set_channel)(struct ieee802154_hw *hw, u8 page, |
198 | u8 channel); | |
5a504397 AA |
199 | int (*set_hw_addr_filt)(struct ieee802154_hw *hw, |
200 | struct ieee802154_hw_addr_filt *filt, | |
0afd7ad9 | 201 | unsigned long changed); |
e2eb173a | 202 | int (*set_txpower)(struct ieee802154_hw *hw, s32 mbm); |
5a504397 | 203 | int (*set_lbt)(struct ieee802154_hw *hw, bool on); |
7fe9a388 AA |
204 | int (*set_cca_mode)(struct ieee802154_hw *hw, |
205 | const struct wpan_phy_cca *cca); | |
32b23550 | 206 | int (*set_cca_ed_level)(struct ieee802154_hw *hw, s32 mbm); |
5a504397 | 207 | int (*set_csma_params)(struct ieee802154_hw *hw, |
4244db1b | 208 | u8 min_be, u8 max_be, u8 retries); |
5a504397 | 209 | int (*set_frame_retries)(struct ieee802154_hw *hw, |
4244db1b | 210 | s8 retries); |
94b79222 AA |
211 | int (*set_promiscuous_mode)(struct ieee802154_hw *hw, |
212 | const bool on); | |
0afd7ad9 | 213 | }; |
214 | ||
ab24f50f | 215 | /** |
705cbbbe AA |
216 | * ieee802154_be64_to_le64 - copies and convert be64 to le64 |
217 | * @le64_dst: le64 destination pointer | |
218 | * @be64_src: be64 source pointer | |
ab24f50f | 219 | */ |
705cbbbe | 220 | static inline void ieee802154_be64_to_le64(void *le64_dst, const void *be64_src) |
ab24f50f | 221 | { |
ba5bf17e | 222 | __put_unaligned_memmove64(swab64p(be64_src), le64_dst); |
ab24f50f AA |
223 | } |
224 | ||
239a84a9 AA |
225 | /** |
226 | * ieee802154_le64_to_be64 - copies and convert le64 to be64 | |
227 | * @be64_dst: be64 destination pointer | |
228 | * @le64_src: le64 source pointer | |
229 | */ | |
230 | static inline void ieee802154_le64_to_be64(void *be64_dst, const void *le64_src) | |
231 | { | |
b9767969 | 232 | __put_unaligned_memmove64(swab64p(le64_src), be64_dst); |
239a84a9 AA |
233 | } |
234 | ||
42fb23e2 VB |
235 | /** |
236 | * ieee802154_alloc_hw - Allocate a new hardware device | |
237 | * | |
238 | * This must be called once for each hardware device. The returned pointer | |
239 | * must be used to refer to this device when calling other functions. | |
240 | * mac802154 allocates a private data area for the driver pointed to by | |
241 | * @priv in &struct ieee802154_hw, the size of this area is given as | |
242 | * @priv_data_len. | |
243 | * | |
244 | * @priv_data_len: length of private data | |
245 | * @ops: callbacks for this device | |
246 | * | |
247 | * Return: A pointer to the new hardware device, or %NULL on error. | |
248 | */ | |
5a504397 | 249 | struct ieee802154_hw * |
16301861 | 250 | ieee802154_alloc_hw(size_t priv_data_len, const struct ieee802154_ops *ops); |
42fb23e2 VB |
251 | |
252 | /** | |
253 | * ieee802154_free_hw - free hardware descriptor | |
254 | * | |
255 | * This function frees everything that was allocated, including the | |
256 | * private data for the driver. You must call ieee802154_unregister_hw() | |
257 | * before calling this function. | |
258 | * | |
259 | * @hw: the hardware to free | |
260 | */ | |
5a504397 | 261 | void ieee802154_free_hw(struct ieee802154_hw *hw); |
42fb23e2 VB |
262 | |
263 | /** | |
264 | * ieee802154_register_hw - Register hardware device | |
265 | * | |
266 | * You must call this function before any other functions in | |
267 | * mac802154. Note that before a hardware can be registered, you | |
268 | * need to fill the contained wpan_phy's information. | |
269 | * | |
270 | * @hw: the device to register as returned by ieee802154_alloc_hw() | |
271 | * | |
272 | * Return: 0 on success. An error code otherwise. | |
273 | */ | |
5a504397 | 274 | int ieee802154_register_hw(struct ieee802154_hw *hw); |
42fb23e2 VB |
275 | |
276 | /** | |
277 | * ieee802154_unregister_hw - Unregister a hardware device | |
278 | * | |
279 | * This function instructs mac802154 to free allocated resources | |
280 | * and unregister netdevices from the networking subsystem. | |
281 | * | |
282 | * @hw: the hardware to unregister | |
283 | */ | |
5a504397 | 284 | void ieee802154_unregister_hw(struct ieee802154_hw *hw); |
1010f540 | 285 | |
42fb23e2 VB |
286 | /** |
287 | * ieee802154_rx - receive frame | |
288 | * | |
289 | * Use this function to hand received frames to mac802154. The receive | |
290 | * buffer in @skb must start with an IEEE 802.15.4 header. In case of a | |
291 | * paged @skb is used, the driver is recommended to put the ieee802154 | |
292 | * header of the frame on the linear part of the @skb to avoid memory | |
293 | * allocation and/or memcpy by the stack. | |
294 | * | |
295 | * This function may not be called in IRQ context. Calls to this function | |
296 | * for a single hardware must be synchronized against each other. | |
297 | * | |
298 | * @hw: the hardware this frame came in on | |
299 | * @skb: the buffer to receive, owned by mac802154 after this call | |
300 | */ | |
c5c47e67 | 301 | void ieee802154_rx(struct ieee802154_hw *hw, struct sk_buff *skb); |
42fb23e2 VB |
302 | |
303 | /** | |
304 | * ieee802154_rx_irqsafe - receive frame | |
305 | * | |
306 | * Like ieee802154_rx() but can be called in IRQ context | |
307 | * (internally defers to a tasklet.) | |
308 | * | |
309 | * @hw: the hardware this frame came in on | |
310 | * @skb: the buffer to receive, owned by mac802154 after this call | |
311 | * @lqi: link quality indicator | |
312 | */ | |
5a504397 | 313 | void ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, |
1cd829c8 | 314 | u8 lqi); |
42fb23e2 VB |
315 | /** |
316 | * ieee802154_wake_queue - wake ieee802154 queue | |
317 | * @hw: pointer as obtained from ieee802154_alloc_hw(). | |
318 | * | |
319 | * Drivers should use this function instead of netif_wake_queue. | |
320 | */ | |
c2085103 | 321 | void ieee802154_wake_queue(struct ieee802154_hw *hw); |
42fb23e2 VB |
322 | |
323 | /** | |
324 | * ieee802154_stop_queue - stop ieee802154 queue | |
325 | * @hw: pointer as obtained from ieee802154_alloc_hw(). | |
326 | * | |
327 | * Drivers should use this function instead of netif_stop_queue. | |
328 | */ | |
c2085103 | 329 | void ieee802154_stop_queue(struct ieee802154_hw *hw); |
42fb23e2 VB |
330 | |
331 | /** | |
332 | * ieee802154_xmit_complete - frame transmission complete | |
333 | * | |
334 | * @hw: pointer as obtained from ieee802154_alloc_hw(). | |
335 | * @skb: buffer for transmission | |
336 | * @ifs_handling: indicate interframe space handling | |
337 | */ | |
61f2dcba AA |
338 | void ieee802154_xmit_complete(struct ieee802154_hw *hw, struct sk_buff *skb, |
339 | bool ifs_handling); | |
c2085103 | 340 | |
0afd7ad9 | 341 | #endif /* NET_MAC802154_H */ |