1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
15 * redistribution must be conditioned upon including a substantially
16 * similar Disclaimer requirement for further binary redistribution.
17 *
18 * NO WARRANTY
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
29 * THE POSSIBILITY OF SUCH DAMAGES.
30 */
31 #include <sys/cdefs.h>
32 /*
33 * This implements an empty DFS module.
34 */
35 #include "opt_ath.h"
36 #include "opt_inet.h"
37 #include "opt_wlan.h"
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/sysctl.h>
42 #include <sys/kernel.h>
43 #include <sys/lock.h>
44 #include <sys/malloc.h>
45 #include <sys/mutex.h>
46 #include <sys/errno.h>
47
48 #include <machine/bus.h>
49 #include <machine/resource.h>
50 #include <sys/bus.h>
51
52 #include <sys/socket.h>
53
54 #include <net/if.h>
55 #include <net/if_var.h>
56 #include <net/if_media.h>
57 #include <net/if_arp.h>
58 #include <net/ethernet.h> /* XXX for ether_sprintf */
59
60 #include <net80211/ieee80211_var.h>
61
62 #include <net/bpf.h>
63
64 #ifdef INET
65 #include <netinet/in.h>
66 #include <netinet/if_ether.h>
67 #endif
68
69 #include <dev/ath/if_athvar.h>
70 #include <dev/ath/if_athdfs.h>
71
72 #include <dev/ath/ath_hal/ah_desc.h>
73
74 /*
75 * Methods which are required
76 */
77
78 /*
79 * Attach DFS to the given interface
80 */
81 int
ath_dfs_attach(struct ath_softc * sc)82 ath_dfs_attach(struct ath_softc *sc)
83 {
84 return (1);
85 }
86
87 /*
88 * Detach DFS from the given interface
89 */
90 int
ath_dfs_detach(struct ath_softc * sc)91 ath_dfs_detach(struct ath_softc *sc)
92 {
93 return (1);
94 }
95
96 /*
97 * Enable radar check. Return 1 if the driver should
98 * enable radar PHY errors, or 0 if not.
99 */
100 int
ath_dfs_radar_enable(struct ath_softc * sc,struct ieee80211_channel * chan)101 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan)
102 {
103 #if 1
104 HAL_PHYERR_PARAM pe;
105
106 /* Check if the hardware supports radar reporting */
107 /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */
108 if (ath_hal_getcapability(sc->sc_ah,
109 HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK)
110 return (0);
111
112 /* Check if the current channel is radar-enabled */
113 if (! IEEE80211_IS_CHAN_DFS(chan))
114 return (0);
115
116 /* Fetch the default parameters */
117 memset(&pe, '\0', sizeof(pe));
118 if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe))
119 return (0);
120
121 /* Enable radar PHY error reporting */
122 sc->sc_dodfs = 1;
123
124 /* Tell the hardware to enable radar reporting */
125 pe.pe_enabled = 1;
126
127 /* Flip on extension channel events only if doing HT40 */
128 if (IEEE80211_IS_CHAN_HT40(chan))
129 pe.pe_extchannel = 1;
130 else
131 pe.pe_extchannel = 0;
132
133 ath_hal_enabledfs(sc->sc_ah, &pe);
134
135 /*
136 * Disable strong signal fast diversity - needed for
137 * AR5212 and similar PHYs for reliable short pulse
138 * duration.
139 */
140 (void) ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY, 2, 0, NULL);
141
142 return (1);
143 #else
144 return (0);
145 #endif
146 }
147
148 /*
149 * Explicity disable radar reporting.
150 *
151 * Return 0 if it was disabled, < 0 on error.
152 */
153 int
ath_dfs_radar_disable(struct ath_softc * sc)154 ath_dfs_radar_disable(struct ath_softc *sc)
155 {
156 #if 1
157 HAL_PHYERR_PARAM pe;
158
159 (void) ath_hal_getdfsthresh(sc->sc_ah, &pe);
160 pe.pe_enabled = 0;
161 (void) ath_hal_enabledfs(sc->sc_ah, &pe);
162 return (0);
163 #else
164 return (0);
165 #endif
166 }
167
168 /*
169 * Process DFS related PHY errors
170 *
171 * The mbuf is not "ours" and if we want a copy, we have
172 * to take a copy. It'll be freed after this function returns.
173 */
174 void
ath_dfs_process_phy_err(struct ath_softc * sc,struct mbuf * m,uint64_t tsf,struct ath_rx_status * rxstat)175 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m,
176 uint64_t tsf, struct ath_rx_status *rxstat)
177 {
178
179 }
180
181 /*
182 * Process the radar events and determine whether a DFS event has occurred.
183 *
184 * This is designed to run outside of the RX processing path.
185 * The RX path will call ath_dfs_tasklet_needed() to see whether
186 * the task/callback running this routine needs to be called.
187 */
188 int
ath_dfs_process_radar_event(struct ath_softc * sc,struct ieee80211_channel * chan)189 ath_dfs_process_radar_event(struct ath_softc *sc,
190 struct ieee80211_channel *chan)
191 {
192 return (0);
193 }
194
195 /*
196 * Determine whether the DFS check task needs to be queued.
197 *
198 * This is called in the RX task when the current batch of packets
199 * have been received. It will return whether there are any radar
200 * events for ath_dfs_process_radar_event() to handle.
201 */
202 int
ath_dfs_tasklet_needed(struct ath_softc * sc,struct ieee80211_channel * chan)203 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan)
204 {
205 return (0);
206 }
207
208 /*
209 * Handle ioctl requests from the diagnostic interface.
210 *
211 * The initial part of this code resembles ath_ioctl_diag();
212 * it's likely a good idea to reduce duplication between
213 * these two routines.
214 */
215 int
ath_ioctl_phyerr(struct ath_softc * sc,struct ath_diag * ad)216 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad)
217 {
218 unsigned int id = ad->ad_id & ATH_DIAG_ID;
219 void *indata = NULL;
220 void *outdata = NULL;
221 u_int32_t insize = ad->ad_in_size;
222 u_int32_t outsize = ad->ad_out_size;
223 int error = 0;
224 HAL_PHYERR_PARAM peout;
225 HAL_PHYERR_PARAM *pe;
226
227 if (ad->ad_id & ATH_DIAG_IN) {
228 /*
229 * Copy in data.
230 */
231 indata = malloc(insize, M_TEMP, M_NOWAIT);
232 if (indata == NULL) {
233 error = ENOMEM;
234 goto bad;
235 }
236 error = copyin(ad->ad_in_data, indata, insize);
237 if (error)
238 goto bad;
239 }
240 if (ad->ad_id & ATH_DIAG_DYN) {
241 /*
242 * Allocate a buffer for the results (otherwise the HAL
243 * returns a pointer to a buffer where we can read the
244 * results). Note that we depend on the HAL leaving this
245 * pointer for us to use below in reclaiming the buffer;
246 * may want to be more defensive.
247 */
248 outdata = malloc(outsize, M_TEMP, M_NOWAIT);
249 if (outdata == NULL) {
250 error = ENOMEM;
251 goto bad;
252 }
253 }
254 switch (id) {
255 case DFS_SET_THRESH:
256 if (insize < sizeof(HAL_PHYERR_PARAM)) {
257 error = EINVAL;
258 break;
259 }
260 pe = (HAL_PHYERR_PARAM *) indata;
261 ath_hal_enabledfs(sc->sc_ah, pe);
262 break;
263 case DFS_GET_THRESH:
264 memset(&peout, 0, sizeof(peout));
265 outsize = sizeof(HAL_PHYERR_PARAM);
266 ath_hal_getdfsthresh(sc->sc_ah, &peout);
267 pe = (HAL_PHYERR_PARAM *) outdata;
268 memcpy(pe, &peout, sizeof(*pe));
269 break;
270 default:
271 error = EINVAL;
272 }
273 if (outsize < ad->ad_out_size)
274 ad->ad_out_size = outsize;
275 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
276 error = EFAULT;
277 bad:
278 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
279 free(indata, M_TEMP);
280 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
281 free(outdata, M_TEMP);
282 return (error);
283 }
284
285 /*
286 * Get the current DFS thresholds from the HAL
287 */
288 int
ath_dfs_get_thresholds(struct ath_softc * sc,HAL_PHYERR_PARAM * param)289 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param)
290 {
291 ath_hal_getdfsthresh(sc->sc_ah, param);
292 return (1);
293 }
294