1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __MAC802154_DRIVER_OPS
3 #define __MAC802154_DRIVER_OPS
4
5 #include <linux/types.h>
6 #include <linux/rtnetlink.h>
7
8 #include <net/mac802154.h>
9
10 #include "ieee802154_i.h"
11 #include "trace.h"
12
13 static inline int
14 drv_xmit_async(struct ieee802154_local *local, struct sk_buff *skb)
15 {
16 return local->ops->xmit_async(&local->hw, skb);
17 }
18
19 static inline int
20 drv_xmit_sync(struct ieee802154_local *local, struct sk_buff *skb)
21 {
22 might_sleep();
23
24 return local->ops->xmit_sync(&local->hw, skb);
25 }
26
27 static inline int drv_set_pan_id(struct ieee802154_local *local, __le16 pan_id)
28 {
29 struct ieee802154_hw_addr_filt filt;
30 int ret;
31
32 might_sleep();
33
34 if (!local->ops->set_hw_addr_filt) {
35 WARN_ON(1);
36 return -EOPNOTSUPP;
37 }
38
39 filt.pan_id = pan_id;
40
41 trace_802154_drv_set_pan_id(local, pan_id);
42 ret = local->ops->set_hw_addr_filt(&local->hw, &filt,
43 IEEE802154_AFILT_PANID_CHANGED);
44 trace_802154_drv_return_int(local, ret);
45 return ret;
46 }
47
48 static inline int
49 drv_set_extended_addr(struct ieee802154_local *local, __le64 extended_addr)
50 {
51 struct ieee802154_hw_addr_filt filt;
52 int ret;
53
54 might_sleep();
55
56 if (!local->ops->set_hw_addr_filt) {
57 WARN_ON(1);
58 return -EOPNOTSUPP;
59 }
60
61 filt.ieee_addr = extended_addr;
62
63 trace_802154_drv_set_extended_addr(local, extended_addr);
64 ret = local->ops->set_hw_addr_filt(&local->hw, &filt,
65 IEEE802154_AFILT_IEEEADDR_CHANGED);
66 trace_802154_drv_return_int(local, ret);
67 return ret;
68 }
69
70 static inline int
71 drv_set_short_addr(struct ieee802154_local *local, __le16 short_addr)
72 {
73 struct ieee802154_hw_addr_filt filt;
74 int ret;
75
76 might_sleep();
77
78 if (!local->ops->set_hw_addr_filt) {
79 WARN_ON(1);
80 return -EOPNOTSUPP;
81 }
82
83 filt.short_addr = short_addr;
84
85 trace_802154_drv_set_short_addr(local, short_addr);
86 ret = local->ops->set_hw_addr_filt(&local->hw, &filt,
87 IEEE802154_AFILT_SADDR_CHANGED);
88 trace_802154_drv_return_int(local, ret);
89 return ret;
90 }
91
92 static inline int
93 drv_set_pan_coord(struct ieee802154_local *local, bool is_coord)
94 {
95 struct ieee802154_hw_addr_filt filt;
96 int ret;
97
98 might_sleep();
99
100 if (!local->ops->set_hw_addr_filt) {
101 WARN_ON(1);
102 return -EOPNOTSUPP;
103 }
104
105 filt.pan_coord = is_coord;
106
107 trace_802154_drv_set_pan_coord(local, is_coord);
108 ret = local->ops->set_hw_addr_filt(&local->hw, &filt,
109 IEEE802154_AFILT_PANC_CHANGED);
110 trace_802154_drv_return_int(local, ret);
111 return ret;
112 }
113
114 static inline int
115 drv_set_promiscuous_mode(struct ieee802154_local *local, bool on)
116 {
117 int ret;
118
119 might_sleep();
120
121 if (!local->ops->set_promiscuous_mode) {
122 WARN_ON(1);
123 return -EOPNOTSUPP;
124 }
125
126 trace_802154_drv_set_promiscuous_mode(local, on);
127 ret = local->ops->set_promiscuous_mode(&local->hw, on);
128 trace_802154_drv_return_int(local, ret);
129 return ret;
130 }
131
132 static inline int drv_start(struct ieee802154_local *local,
133 enum ieee802154_filtering_level level,
134 const struct ieee802154_hw_addr_filt *addr_filt)
135 {
136 int ret;
137
138 might_sleep();
139
140 /* setup receive mode parameters e.g. address mode */
141 if (local->hw.flags & IEEE802154_HW_AFILT) {
142 ret = drv_set_pan_id(local, addr_filt->pan_id);
143 if (ret < 0)
144 return ret;
145
146 ret = drv_set_short_addr(local, addr_filt->short_addr);
147 if (ret < 0)
148 return ret;
149
150 ret = drv_set_extended_addr(local, addr_filt->ieee_addr);
151 if (ret < 0)
152 return ret;
153 }
154
155 switch (level) {
156 case IEEE802154_FILTERING_NONE:
157 fallthrough;
158 case IEEE802154_FILTERING_1_FCS:
159 fallthrough;
160 case IEEE802154_FILTERING_2_PROMISCUOUS:
161 /* TODO: Requires a different receive mode setup e.g.
162 * at86rf233 hardware.
163 */
164 fallthrough;
165 case IEEE802154_FILTERING_3_SCAN:
166 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
167 ret = drv_set_promiscuous_mode(local, true);
168 if (ret < 0)
169 return ret;
170 } else {
171 return -EOPNOTSUPP;
172 }
173
174 /* In practice other filtering levels can be requested, but as
175 * for now most hardware/drivers only support
176 * IEEE802154_FILTERING_NONE, we fallback to this actual
177 * filtering level in hardware and make our own additional
178 * filtering in mac802154 receive path.
179 *
180 * TODO: Move this logic to the device drivers as hardware may
181 * support more higher level filters. Hardware may also require
182 * a different order how register are set, which could currently
183 * be buggy, so all received parameters need to be moved to the
184 * start() callback and let the driver go into the mode before
185 * it will turn on receive handling.
186 */
187 local->phy->filtering = IEEE802154_FILTERING_NONE;
188 break;
189 case IEEE802154_FILTERING_4_FRAME_FIELDS:
190 /* Do not error out if IEEE802154_HW_PROMISCUOUS because we
191 * expect the hardware to operate at the level
192 * IEEE802154_FILTERING_4_FRAME_FIELDS anyway.
193 */
194 if (local->hw.flags & IEEE802154_HW_PROMISCUOUS) {
195 ret = drv_set_promiscuous_mode(local, false);
196 if (ret < 0)
197 return ret;
198 }
199
200 local->phy->filtering = IEEE802154_FILTERING_4_FRAME_FIELDS;
201 break;
202 default:
203 WARN_ON(1);
204 return -EINVAL;
205 }
206
207 trace_802154_drv_start(local);
208 local->started = true;
209 smp_mb();
210 ret = local->ops->start(&local->hw);
211 trace_802154_drv_return_int(local, ret);
212 return ret;
213 }
214
215 static inline void drv_stop(struct ieee802154_local *local)
216 {
217 might_sleep();
218
219 trace_802154_drv_stop(local);
220 local->ops->stop(&local->hw);
221 trace_802154_drv_return_void(local);
222
223 /* sync away all work on the tasklet before clearing started */
224 tasklet_disable(&local->tasklet);
225 tasklet_enable(&local->tasklet);
226
227 barrier();
228
229 local->started = false;
230 }
231
232 static inline int
233 drv_set_channel(struct ieee802154_local *local, u8 page, u8 channel)
234 {
235 int ret;
236
237 might_sleep();
238
239 trace_802154_drv_set_channel(local, page, channel);
240 ret = local->ops->set_channel(&local->hw, page, channel);
241 trace_802154_drv_return_int(local, ret);
242 return ret;
243 }
244
245 static inline int drv_set_tx_power(struct ieee802154_local *local, s32 mbm)
246 {
247 int ret;
248
249 might_sleep();
250
251 if (!local->ops->set_txpower) {
252 WARN_ON(1);
253 return -EOPNOTSUPP;
254 }
255
256 trace_802154_drv_set_tx_power(local, mbm);
257 ret = local->ops->set_txpower(&local->hw, mbm);
258 trace_802154_drv_return_int(local, ret);
259 return ret;
260 }
261
262 static inline int drv_set_cca_mode(struct ieee802154_local *local,
263 const struct wpan_phy_cca *cca)
264 {
265 int ret;
266
267 might_sleep();
268
269 if (!local->ops->set_cca_mode) {
270 WARN_ON(1);
271 return -EOPNOTSUPP;
272 }
273
274 trace_802154_drv_set_cca_mode(local, cca);
275 ret = local->ops->set_cca_mode(&local->hw, cca);
276 trace_802154_drv_return_int(local, ret);
277 return ret;
278 }
279
280 static inline int drv_set_lbt_mode(struct ieee802154_local *local, bool mode)
281 {
282 int ret;
283
284 might_sleep();
285
286 if (!local->ops->set_lbt) {
287 WARN_ON(1);
288 return -EOPNOTSUPP;
289 }
290
291 trace_802154_drv_set_lbt_mode(local, mode);
292 ret = local->ops->set_lbt(&local->hw, mode);
293 trace_802154_drv_return_int(local, ret);
294 return ret;
295 }
296
297 static inline int
298 drv_set_cca_ed_level(struct ieee802154_local *local, s32 mbm)
299 {
300 int ret;
301
302 might_sleep();
303
304 if (!local->ops->set_cca_ed_level) {
305 WARN_ON(1);
306 return -EOPNOTSUPP;
307 }
308
309 trace_802154_drv_set_cca_ed_level(local, mbm);
310 ret = local->ops->set_cca_ed_level(&local->hw, mbm);
311 trace_802154_drv_return_int(local, ret);
312 return ret;
313 }
314
315 static inline int
316 drv_set_csma_params(struct ieee802154_local *local, u8 min_be, u8 max_be,
317 u8 max_csma_backoffs)
318 {
319 int ret;
320
321 might_sleep();
322
323 if (!local->ops->set_csma_params) {
324 WARN_ON(1);
325 return -EOPNOTSUPP;
326 }
327
328 trace_802154_drv_set_csma_params(local, min_be, max_be,
329 max_csma_backoffs);
330 ret = local->ops->set_csma_params(&local->hw, min_be, max_be,
331 max_csma_backoffs);
332 trace_802154_drv_return_int(local, ret);
333 return ret;
334 }
335
336 static inline int
337 drv_set_max_frame_retries(struct ieee802154_local *local, s8 max_frame_retries)
338 {
339 int ret;
340
341 might_sleep();
342
343 if (!local->ops->set_frame_retries) {
344 WARN_ON(1);
345 return -EOPNOTSUPP;
346 }
347
348 trace_802154_drv_set_max_frame_retries(local, max_frame_retries);
349 ret = local->ops->set_frame_retries(&local->hw, max_frame_retries);
350 trace_802154_drv_return_int(local, ret);
351 return ret;
352 }
353
354 #endif /* __MAC802154_DRIVER_OPS */
355
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.