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[FreeBSD/releng/10.2.git] / sys / dev / ath / if_ath_spectral.c
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, MERCHANTIBILITY
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/mutex.h>
47 #include <sys/errno.h>
48
49 #include <machine/bus.h>
50 #include <machine/resource.h>
51 #include <sys/bus.h>
52
53 #include <sys/socket.h>
54  
55 #include <net/if.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_ath_spectral.h>
71
72 #include <dev/ath/ath_hal/ah_desc.h>
73
74 struct ath_spectral_state {
75         HAL_SPECTRAL_PARAM      spectral_state;
76
77         /*
78          * Should we enable spectral scan upon
79          * each network interface reset/change?
80          *
81          * This is intended to allow spectral scan
82          * frame reporting during channel scans.
83          *
84          * Later on it can morph into a larger
85          * scale config method where it pushes
86          * a "channel scan" config into the hardware
87          * rather than just the spectral_state
88          * config.
89          */
90         int spectral_enable_after_reset;
91 };
92
93 /*
94  * Methods which are required
95  */
96
97 /*
98  * Attach spectral to the given interface
99  */
100 int
101 ath_spectral_attach(struct ath_softc *sc)
102 {
103         struct ath_spectral_state *ss;
104
105         /*
106          * If spectral isn't supported, don't error - just
107          * quietly complete.
108          */
109         if (! ath_hal_spectral_supported(sc->sc_ah))
110                 return (0);
111
112         ss = malloc(sizeof(struct ath_spectral_state),
113             M_TEMP, M_WAITOK | M_ZERO);
114
115         if (ss == NULL) {
116                 device_printf(sc->sc_dev, "%s: failed to alloc memory\n",
117                     __func__);
118                 return (-ENOMEM);
119         }
120
121         sc->sc_spectral = ss;
122
123         (void) ath_hal_spectral_get_config(sc->sc_ah, &ss->spectral_state);
124
125         return (0);
126 }
127
128 /*
129  * Detach spectral from the given interface
130  */
131 int
132 ath_spectral_detach(struct ath_softc *sc)
133 {
134
135         if (! ath_hal_spectral_supported(sc->sc_ah))
136                 return (0);
137
138         if (sc->sc_spectral != NULL) {
139                 free(sc->sc_spectral, M_TEMP);
140         }
141         return (0);
142 }
143
144 /*
145  * Check whether spectral needs enabling and if so,
146  * flip it on.
147  */
148 int
149 ath_spectral_enable(struct ath_softc *sc, struct ieee80211_channel *ch)
150 {
151         struct ath_spectral_state *ss = sc->sc_spectral;
152
153         /* Default to disable spectral PHY reporting */
154         sc->sc_dospectral = 0;
155
156         if (ss == NULL)
157                 return (0);
158
159         if (ss->spectral_enable_after_reset) {
160                 ath_hal_spectral_configure(sc->sc_ah,
161                     &ss->spectral_state);
162                 (void) ath_hal_spectral_start(sc->sc_ah);
163                 sc->sc_dospectral = 1;
164         }
165         return (0);
166 }
167
168 /*
169  * Handle ioctl requests from the diagnostic interface.
170  *
171  * The initial part of this code resembles ath_ioctl_diag();
172  * it's likely a good idea to reduce duplication between
173  * these two routines.
174  */
175 int
176 ath_ioctl_spectral(struct ath_softc *sc, struct ath_diag *ad)
177 {
178         unsigned int id = ad->ad_id & ATH_DIAG_ID;
179         void *indata = NULL;
180         void *outdata = NULL;
181         u_int32_t insize = ad->ad_in_size;
182         u_int32_t outsize = ad->ad_out_size;
183         int error = 0;
184         HAL_SPECTRAL_PARAM peout;
185         HAL_SPECTRAL_PARAM *pe;
186         struct ath_spectral_state *ss = sc->sc_spectral;
187         int val;
188
189         if (! ath_hal_spectral_supported(sc->sc_ah))
190                 return (EINVAL);
191
192         if (ad->ad_id & ATH_DIAG_IN) {
193                 /*
194                  * Copy in data.
195                  */
196                 indata = malloc(insize, M_TEMP, M_NOWAIT);
197                 if (indata == NULL) {
198                         error = ENOMEM;
199                         goto bad;
200                 }
201                 error = copyin(ad->ad_in_data, indata, insize);
202                 if (error)
203                         goto bad;
204         }
205         if (ad->ad_id & ATH_DIAG_DYN) {
206                 /*
207                  * Allocate a buffer for the results (otherwise the HAL
208                  * returns a pointer to a buffer where we can read the
209                  * results).  Note that we depend on the HAL leaving this
210                  * pointer for us to use below in reclaiming the buffer;
211                  * may want to be more defensive.
212                  */
213                 outdata = malloc(outsize, M_TEMP, M_NOWAIT);
214                 if (outdata == NULL) {
215                         error = ENOMEM;
216                         goto bad;
217                 }
218         }
219         switch (id) {
220                 case SPECTRAL_CONTROL_GET_PARAMS:
221                         memset(&peout, 0, sizeof(peout));
222                         outsize = sizeof(HAL_SPECTRAL_PARAM);
223                         ath_hal_spectral_get_config(sc->sc_ah, &peout);
224                         pe = (HAL_SPECTRAL_PARAM *) outdata;
225                         memcpy(pe, &peout, sizeof(*pe));
226                         break;
227                 case SPECTRAL_CONTROL_SET_PARAMS:
228                         if (insize < sizeof(HAL_SPECTRAL_PARAM)) {
229                                 error = EINVAL;
230                                 break;
231                         }
232                         pe = (HAL_SPECTRAL_PARAM *) indata;
233                         ath_hal_spectral_configure(sc->sc_ah, pe);
234                         /* Save a local copy of the updated parameters */
235                         ath_hal_spectral_get_config(sc->sc_ah,
236                             &ss->spectral_state);
237                         break;
238                 case SPECTRAL_CONTROL_START:
239                         ath_hal_spectral_configure(sc->sc_ah,
240                             &ss->spectral_state);
241                         (void) ath_hal_spectral_start(sc->sc_ah);
242                         sc->sc_dospectral = 1;
243                         /* XXX need to update the PHY mask in the driver */
244                         break;
245                 case SPECTRAL_CONTROL_STOP:
246                         (void) ath_hal_spectral_stop(sc->sc_ah);
247                         sc->sc_dospectral = 0;
248                         /* XXX need to update the PHY mask in the driver */
249                         break;
250                 case SPECTRAL_CONTROL_ENABLE_AT_RESET:
251                         if (insize < sizeof(int)) {
252                                 device_printf(sc->sc_dev, "%d != %d\n",
253                                     insize,
254                                     (int) sizeof(int));
255                                 error = EINVAL;
256                                 break;
257                         }
258                         if (indata == NULL) {
259                                 device_printf(sc->sc_dev, "indata=NULL\n");
260                                 error = EINVAL;
261                                 break;
262                         }
263                         val = * ((int *) indata);
264                         if (val == 0)
265                                 ss->spectral_enable_after_reset = 0;
266                         else
267                                 ss->spectral_enable_after_reset = 1;
268                         break;
269                 case SPECTRAL_CONTROL_ENABLE:
270                         /* XXX TODO */
271                 case SPECTRAL_CONTROL_DISABLE:
272                         /* XXX TODO */
273                 break;
274                 default:
275                         error = EINVAL;
276         }
277         if (outsize < ad->ad_out_size)
278                 ad->ad_out_size = outsize;
279         if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
280                 error = EFAULT;
281 bad:
282         if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
283                 free(indata, M_TEMP);
284         if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
285                 free(outdata, M_TEMP);
286         return (error);
287 }
288