if_ath_spectral.c

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    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: releng/11.2/sys/dev/ath/if_ath_spectral.c 332303 2018-04-08 20:50:16Z emaste $
   30  */
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/11.2/sys/dev/ath/if_ath_spectral.c 332303 2018-04-08 20:50:16Z emaste $");
   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/mutex.h>
   48 #include <sys/errno.h>
   49 
   50 #include <machine/bus.h>
   51 #include <machine/resource.h>
   52 #include <sys/bus.h>
   53 
   54 #include <sys/socket.h>
   55  
   56 #include <net/if.h>
   57 #include <net/if_var.h>
   58 #include <net/if_media.h>
   59 #include <net/if_arp.h>
   60 #include <net/ethernet.h>               /* XXX for ether_sprintf */
   61 
   62 #include <net80211/ieee80211_var.h>
   63 
   64 #include <net/bpf.h>
   65 
   66 #ifdef INET
   67 #include <netinet/in.h>
   68 #include <netinet/if_ether.h>
   69 #endif
   70 
   71 #include <dev/ath/if_athvar.h>
   72 #include <dev/ath/if_ath_spectral.h>
   73 
   74 #include <dev/ath/ath_hal/ah_desc.h>
   75 
   76 struct ath_spectral_state {
   77         HAL_SPECTRAL_PARAM      spectral_state;
   78 
   79         /*
   80          * Should we enable spectral scan upon
   81          * each network interface reset/change?
   82          *
   83          * This is intended to allow spectral scan
   84          * frame reporting during channel scans.
   85          *
   86          * Later on it can morph into a larger
   87          * scale config method where it pushes
   88          * a "channel scan" config into the hardware
   89          * rather than just the spectral_state
   90          * config.
   91          */
   92         int spectral_enable_after_reset;
   93 };
   94 
   95 /*
   96  * Methods which are required
   97  */
   98 
   99 /*
  100  * Attach spectral to the given interface
  101  */
  102 int
  103 ath_spectral_attach(struct ath_softc *sc)
  104 {
  105         struct ath_spectral_state *ss;
  106 
  107         /*
  108          * If spectral isn't supported, don't error - just
  109          * quietly complete.
  110          */
  111         if (! ath_hal_spectral_supported(sc->sc_ah))
  112                 return (0);
  113 
  114         ss = malloc(sizeof(struct ath_spectral_state),
  115             M_TEMP, M_WAITOK | M_ZERO);
  116 
  117         if (ss == NULL) {
  118                 device_printf(sc->sc_dev, "%s: failed to alloc memory\n",
  119                     __func__);
  120                 return (-ENOMEM);
  121         }
  122 
  123         sc->sc_spectral = ss;
  124 
  125         (void) ath_hal_spectral_get_config(sc->sc_ah, &ss->spectral_state);
  126 
  127         return (0);
  128 }
  129 
  130 /*
  131  * Detach spectral from the given interface
  132  */
  133 int
  134 ath_spectral_detach(struct ath_softc *sc)
  135 {
  136 
  137         if (! ath_hal_spectral_supported(sc->sc_ah))
  138                 return (0);
  139 
  140         if (sc->sc_spectral != NULL) {
  141                 free(sc->sc_spectral, M_TEMP);
  142         }
  143         return (0);
  144 }
  145 
  146 /*
  147  * Check whether spectral needs enabling and if so,
  148  * flip it on.
  149  */
  150 int
  151 ath_spectral_enable(struct ath_softc *sc, struct ieee80211_channel *ch)
  152 {
  153         struct ath_spectral_state *ss = sc->sc_spectral;
  154 
  155         /* Default to disable spectral PHY reporting */
  156         sc->sc_dospectral = 0;
  157 
  158         if (ss == NULL)
  159                 return (0);
  160 
  161         if (ss->spectral_enable_after_reset) {
  162                 ath_hal_spectral_configure(sc->sc_ah,
  163                     &ss->spectral_state);
  164                 (void) ath_hal_spectral_start(sc->sc_ah);
  165                 sc->sc_dospectral = 1;
  166         }
  167         return (0);
  168 }
  169 
  170 /*
  171  * Handle ioctl requests from the diagnostic interface.
  172  *
  173  * The initial part of this code resembles ath_ioctl_diag();
  174  * it's likely a good idea to reduce duplication between
  175  * these two routines.
  176  */
  177 int
  178 ath_ioctl_spectral(struct ath_softc *sc, struct ath_diag *ad)
  179 {
  180         unsigned int id = ad->ad_id & ATH_DIAG_ID;
  181         void *indata = NULL;
  182         void *outdata = NULL;
  183         u_int32_t insize = ad->ad_in_size;
  184         u_int32_t outsize = ad->ad_out_size;
  185         int error = 0;
  186         HAL_SPECTRAL_PARAM peout;
  187         HAL_SPECTRAL_PARAM *pe;
  188         struct ath_spectral_state *ss = sc->sc_spectral;
  189         int val;
  190 
  191         if (! ath_hal_spectral_supported(sc->sc_ah))
  192                 return (EINVAL);
  193 
  194         if (ad->ad_id & ATH_DIAG_IN) {
  195                 /*
  196                  * Copy in data.
  197                  */
  198                 indata = malloc(insize, M_TEMP, M_NOWAIT);
  199                 if (indata == NULL) {
  200                         error = ENOMEM;
  201                         goto bad;
  202                 }
  203                 error = copyin(ad->ad_in_data, indata, insize);
  204                 if (error)
  205                         goto bad;
  206         }
  207         if (ad->ad_id & ATH_DIAG_DYN) {
  208                 /*
  209                  * Allocate a buffer for the results (otherwise the HAL
  210                  * returns a pointer to a buffer where we can read the
  211                  * results).  Note that we depend on the HAL leaving this
  212                  * pointer for us to use below in reclaiming the buffer;
  213                  * may want to be more defensive.
  214                  */
  215                 outdata = malloc(outsize, M_TEMP, M_NOWAIT | M_ZERO);
  216                 if (outdata == NULL) {
  217                         error = ENOMEM;
  218                         goto bad;
  219                 }
  220         }
  221         switch (id) {
  222                 case SPECTRAL_CONTROL_GET_PARAMS:
  223                         memset(&peout, 0, sizeof(peout));
  224                         outsize = sizeof(HAL_SPECTRAL_PARAM);
  225                         ath_hal_spectral_get_config(sc->sc_ah, &peout);
  226                         pe = (HAL_SPECTRAL_PARAM *) outdata;
  227                         memcpy(pe, &peout, sizeof(*pe));
  228                         break;
  229                 case SPECTRAL_CONTROL_SET_PARAMS:
  230                         if (insize < sizeof(HAL_SPECTRAL_PARAM)) {
  231                                 error = EINVAL;
  232                                 break;
  233                         }
  234                         pe = (HAL_SPECTRAL_PARAM *) indata;
  235                         ath_hal_spectral_configure(sc->sc_ah, pe);
  236                         /* Save a local copy of the updated parameters */
  237                         ath_hal_spectral_get_config(sc->sc_ah,
  238                             &ss->spectral_state);
  239                         break;
  240                 case SPECTRAL_CONTROL_START:
  241                         ath_hal_spectral_configure(sc->sc_ah,
  242                             &ss->spectral_state);
  243                         (void) ath_hal_spectral_start(sc->sc_ah);
  244                         sc->sc_dospectral = 1;
  245                         /* XXX need to update the PHY mask in the driver */
  246                         break;
  247                 case SPECTRAL_CONTROL_STOP:
  248                         (void) ath_hal_spectral_stop(sc->sc_ah);
  249                         sc->sc_dospectral = 0;
  250                         /* XXX need to update the PHY mask in the driver */
  251                         break;
  252                 case SPECTRAL_CONTROL_ENABLE_AT_RESET:
  253                         if (insize < sizeof(int)) {
  254                                 device_printf(sc->sc_dev, "%d != %d\n",
  255                                     insize,
  256                                     (int) sizeof(int));
  257                                 error = EINVAL;
  258                                 break;
  259                         }
  260                         if (indata == NULL) {
  261                                 device_printf(sc->sc_dev, "indata=NULL\n");
  262                                 error = EINVAL;
  263                                 break;
  264                         }
  265                         val = * ((int *) indata);
  266                         if (val == 0)
  267                                 ss->spectral_enable_after_reset = 0;
  268                         else
  269                                 ss->spectral_enable_after_reset = 1;
  270                         break;
  271                 case SPECTRAL_CONTROL_ENABLE:
  272                         /* XXX TODO */
  273                 case SPECTRAL_CONTROL_DISABLE:
  274                         /* XXX TODO */
  275                 break;
  276                 default:
  277                         error = EINVAL;
  278                         goto bad;
  279         }
  280         if (outsize < ad->ad_out_size)
  281                 ad->ad_out_size = outsize;
  282         if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size))
  283                 error = EFAULT;
  284 bad:
  285         if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL)
  286                 free(indata, M_TEMP);
  287         if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL)
  288                 free(outdata, M_TEMP);
  289         return (error);
  290 }
  291
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FreeBSD/Linux Kernel Cross Reference sys/dev/ath/if_ath_spectral.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ath/if_ath_spectral.c
