1 /*-
2 * Copyright (c) 2013 Adrian Chadd <adrian@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
15 *
16 * NO WARRANTY
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTABILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
27 * THE POSSIBILITY OF SUCH DAMAGES.
28 *
29 * $FreeBSD$
30 */
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
33
34 /*
35 * Implement some basic spectral scan control logic.
36 */
37 #include "opt_ath.h"
38 #include "opt_inet.h"
39 #include "opt_wlan.h"
40
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/sysctl.h>
44 #include <sys/kernel.h>
45 #include <sys/lock.h>
46 #include <sys/malloc.h>
47 #include <sys/errno.h>
48
49 #if defined(__DragonFly__)
50 /* empty */
51 #else
52 #include <machine/bus.h>
53 #include <machine/resource.h>
54 #endif
55 #include <sys/bus.h>
56
57 #include <sys/socket.h>
58
59 #include <net/if.h>
60 #include <net/if_var.h>
61 #include <net/if_media.h>
62 #include <net/if_arp.h>
63 #include <net/ethernet.h> /* XXX for ether_sprintf */
64
65 #include <netproto/802_11/ieee80211_var.h>
66
67 #include <net/bpf.h>
68
69 #ifdef INET
70 #include <netinet/in.h>
71 #include <netinet/if_ether.h>
72 #endif
73
74 #include <dev/netif/ath/ath/if_athvar.h>
75 #include <dev/netif/ath/ath/if_ath_spectral.h>
76
77 #include <dev/netif/ath/ath_hal/ah_desc.h>
78
79 struct ath_spectral_state {
80 HAL_SPECTRAL_PARAM spectral_state;
81
82 /*
83 * Should we enable spectral scan upon
84 * each network interface reset/change?
85 *
86 * This is intended to allow spectral scan
87 * frame reporting during channel scans.
88 *
89 * Later on it can morph into a larger
90 * scale config method where it pushes
91 * a "channel scan" config into the hardware
92 * rather than just the spectral_state
93 * config.
94 */
95 int spectral_enable_after_reset;
96 };
97
98 /*
99 * Methods which are required
100 */
101
102 /*
103 * Attach spectral to the given interface
104 */
105 int
ath_spectral_attach(struct ath_softc * sc)106 ath_spectral_attach(struct ath_softc *sc)
107 {
108 struct ath_spectral_state *ss;
109
110 /*
111 * If spectral isn't supported, don't error - just
112 * quietly complete.
113 */
114 if (! ath_hal_spectral_supported(sc->sc_ah))
115 return (0);
116
117 ss = kmalloc(sizeof(struct ath_spectral_state),
118 M_TEMP, M_WAITOK | M_ZERO);
119
120 if (ss == NULL) {
121 device_printf(sc->sc_dev, "%s: failed to alloc memory\n",
122 __func__);
123 return (-ENOMEM);
124 }
125
126 sc->sc_spectral = ss;
127
128 (void) ath_hal_spectral_get_config(sc->sc_ah, &ss->spectral_state);
129
130 return (0);
131 }
132
133 /*
134 * Detach spectral from the given interface
135 */
136 int
ath_spectral_detach(struct ath_softc * sc)137 ath_spectral_detach(struct ath_softc *sc)
138 {
139
140 if (! ath_hal_spectral_supported(sc->sc_ah))
141 return (0);
142
143 if (sc->sc_spectral != NULL) {
144 kfree(sc->sc_spectral, M_TEMP);
145 }
146 return (0);
147 }
148
149 /*
150 * Check whether spectral needs enabling and if so,
151 * flip it on.
152 */
153 int
ath_spectral_enable(struct ath_softc * sc,struct ieee80211_channel * ch)154 ath_spectral_enable(struct ath_softc *sc, struct ieee80211_channel *ch)
155 {
156 struct ath_spectral_state *ss = sc->sc_spectral;
157
158 /* Default to disable spectral PHY reporting */
159 sc->sc_dospectral = 0;
160
161 if (ss == NULL)
162 return (0);
163
164 if (ss->spectral_enable_after_reset) {
165 ath_hal_spectral_configure(sc->sc_ah,
166 &ss->spectral_state);
167 (void) ath_hal_spectral_start(sc->sc_ah);
168 sc->sc_dospectral = 1;
169 }
170 return (0);
171 }
172
173 /*
174 * Handle ioctl requests from the diagnostic interface.
175 *
176 * The initial part of this code resembles ath_ioctl_diag();
177 * it's likely a good idea to reduce duplication between
178 * these two routines.
179 */
180 int
ath_ioctl_spectral(struct ath_softc * sc,struct ath_diag * ad)181 ath_ioctl_spectral(struct ath_softc *sc, struct ath_diag *ad)
182 {
183 unsigned int id = ad->ad_id & ATH_DIAG_ID;
184 void *indata = NULL;
185 void *outdata = NULL;
186 u_int32_t insize = ad->ad_in_size;
187 u_int32_t outsize = ad->ad_out_size;
188 int error = 0;
189 HAL_SPECTRAL_PARAM peout;
190 HAL_SPECTRAL_PARAM *pe;
191 struct ath_spectral_state *ss = sc->sc_spectral;
192 int val;
193
194 if (! ath_hal_spectral_supported(sc->sc_ah))
195 return (EINVAL);
196
197 if (ad->ad_id & ATH_DIAG_IN) {
198 /*
199 * Copy in data.
200 */
201 indata = kmalloc(insize, M_TEMP, M_INTWAIT);
202 if (indata == NULL) {
203 error = ENOMEM;
204 goto bad;
205 }
206 error = copyin(ad->ad_in_data, indata, insize);
207 if (error)
208 goto bad;
209 }
210 if (ad->ad_id & ATH_DIAG_DYN) {
211 /*
212 * Allocate a buffer for the results (otherwise the HAL
213 * returns a pointer to a buffer where we can read the
214 * results). Note that we depend on the HAL leaving this
215 * pointer for us to use below in reclaiming the buffer;
216 * may want to be more defensive.
217 */
218 outdata = kmalloc(outsize, M_TEMP, M_INTWAIT);
219 if (outdata == NULL) {
220 error = ENOMEM;
221 goto bad;
222 }
223 }
224 switch (id) {
225 case SPECTRAL_CONTROL_GET_PARAMS:
226 memset(&peout, 0, sizeof(peout));
227 outsize = sizeof(HAL_SPECTRAL_PARAM);
228 ath_hal_spectral_get_config(sc->sc_ah, &peout);
229 pe = (HAL_SPECTRAL_PARAM *) outdata;
230 memcpy(pe, &peout, sizeof(*pe));
231 break;
232 case SPECTRAL_CONTROL_SET_PARAMS:
233 if (insize < sizeof(HAL_SPECTRAL_PARAM)) {
234 error = EINVAL;
235 break;
236 }
237 pe = (HAL_SPECTRAL_PARAM *) indata;
238 ath_hal_spectral_configure(sc->sc_ah, pe);
239 /* Save a local copy of the updated parameters */
240 ath_hal_spectral_get_config(sc->sc_ah,
241 &ss->spectral_state);
242 break;
243 case SPECTRAL_CONTROL_START:
244 ath_hal_spectral_configure(sc->sc_ah,
245 &ss->spectral_state);
246 (void) ath_hal_spectral_start(sc->sc_ah);
247 sc->sc_dospectral = 1;
248 /* XXX need to update the PHY mask in the driver */
249 break;
250 case SPECTRAL_CONTROL_STOP:
251 (void) ath_hal_spectral_stop(sc->sc_ah);
252 sc->sc_dospectral = 0;
253 /* XXX need to update the PHY mask in the driver */
254 break;
255 case SPECTRAL_CONTROL_ENABLE_AT_RESET:
256 if (insize < sizeof(int)) {
257 device_printf(sc->sc_dev, "%d != %d\n",
258 insize,
259 (int) sizeof(int));
260 error = EINVAL;
261 break;
262 }
263 if (indata == NULL) {
264 device_printf(sc->sc_dev, "indata=NULL\n");
265 error = EINVAL;
266 break;
267 }
268 val = * ((int *) indata);
269 if (val == 0)
270 ss->spectral_enable_after_reset = 0;
271 else
272 ss->spectral_enable_after_reset = 1;
273 break;
274 case SPECTRAL_CONTROL_ENABLE:
275 /* XXX TODO */
276 case SPECTRAL_CONTROL_DISABLE:
277 /* XXX TODO */
278 break;
279 default:
280 error = EINVAL;
281 }
282 if (outsize < ad->ad_out_size)
283 ad->ad_out_size = outsize;
284 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
285 error = EFAULT;
286 bad:
287 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
288 kfree(indata, M_TEMP);
289 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
290 kfree(outdata, M_TEMP);
291 return (error);
292 }
293
294