dfs_null.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    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  * $FreeBSD$
   32  */
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 /*
   37  * This implements an empty DFS module.
   38  */
   39 #include "opt_ath.h"
   40 #include "opt_inet.h"
   41 #include "opt_wlan.h"
   42 
   43 #include <sys/param.h>
   44 #include <sys/systm.h> 
   45 #include <sys/sysctl.h>
   46 #include <sys/kernel.h>
   47 #include <sys/lock.h>
   48 #include <sys/malloc.h>
   49 #include <sys/mutex.h>
   50 #include <sys/errno.h>
   51 
   52 #include <machine/bus.h>
   53 #include <machine/resource.h>
   54 #include <sys/bus.h>
   55 
   56 #include <sys/socket.h>
   57 
   58 #include <net/if.h>
   59 #include <net/if_var.h>
   60 #include <net/if_media.h>
   61 #include <net/if_arp.h>
   62 #include <net/ethernet.h>               /* XXX for ether_sprintf */
   63 
   64 #include <net80211/ieee80211_var.h>
   65 
   66 #include <net/bpf.h>
   67 
   68 #ifdef INET
   69 #include <netinet/in.h>
   70 #include <netinet/if_ether.h>
   71 #endif
   72 
   73 #include <dev/ath/if_athvar.h>
   74 #include <dev/ath/if_athdfs.h>
   75 
   76 #include <dev/ath/ath_hal/ah_desc.h>
   77 
   78 /*
   79  * Methods which are required
   80  */
   81 
   82 /*
   83  * Attach DFS to the given interface
   84  */
   85 int
   86 ath_dfs_attach(struct ath_softc *sc)
   87 {
   88         return (1);
   89 }
   90 
   91 /*
   92  * Detach DFS from the given interface
   93  */
   94 int
   95 ath_dfs_detach(struct ath_softc *sc)
   96 {
   97         return (1);
   98 }
   99 
  100 /*
  101  * Enable radar check.  Return 1 if the driver should
  102  * enable radar PHY errors, or 0 if not.
  103  */
  104 int
  105 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan)
  106 {
  107 #if 1
  108         HAL_PHYERR_PARAM pe;
  109 
  110         /* Check if the hardware supports radar reporting */
  111         /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */
  112         if (ath_hal_getcapability(sc->sc_ah,
  113             HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK)
  114                 return (0);
  115 
  116         /* Check if the current channel is radar-enabled */
  117         if (! IEEE80211_IS_CHAN_DFS(chan))
  118                 return (0);
  119 
  120         /* Fetch the default parameters */
  121         memset(&pe, '\0', sizeof(pe));
  122         if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe))
  123                 return (0);
  124 
  125         /* Enable radar PHY error reporting */
  126         sc->sc_dodfs = 1;
  127 
  128         /* Tell the hardware to enable radar reporting */
  129         pe.pe_enabled = 1;
  130 
  131         /* Flip on extension channel events only if doing HT40 */
  132         if (IEEE80211_IS_CHAN_HT40(chan))
  133                 pe.pe_extchannel = 1;
  134         else
  135                 pe.pe_extchannel = 0;
  136 
  137         ath_hal_enabledfs(sc->sc_ah, &pe);
  138 
  139         /*
  140          * Disable strong signal fast diversity - needed for
  141          * AR5212 and similar PHYs for reliable short pulse
  142          * duration.
  143          */
  144         (void) ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY, 2, 0, NULL);
  145 
  146         return (1);
  147 #else
  148         return (0);
  149 #endif
  150 }
  151 
  152 /*
  153  * Explicity disable radar reporting.
  154  *
  155  * Return 0 if it was disabled, < 0 on error.
  156  */
  157 int
  158 ath_dfs_radar_disable(struct ath_softc *sc)
  159 {
  160 #if 1
  161         HAL_PHYERR_PARAM pe;
  162 
  163         (void) ath_hal_getdfsthresh(sc->sc_ah, &pe);
  164         pe.pe_enabled = 0;
  165         (void) ath_hal_enabledfs(sc->sc_ah, &pe);
  166         return (0);
  167 #else
  168         return (0);
  169 #endif
  170 }
  171 
  172 /*
  173  * Process DFS related PHY errors
  174  *
  175  * The mbuf is not "ours" and if we want a copy, we have
  176  * to take a copy.  It'll be freed after this function returns.
  177  */
  178 void
  179 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m,
  180     uint64_t tsf, struct ath_rx_status *rxstat)
  181 {
  182 
  183 }
  184 
  185 /*
  186  * Process the radar events and determine whether a DFS event has occurred.
  187  *
  188  * This is designed to run outside of the RX processing path.
  189  * The RX path will call ath_dfs_tasklet_needed() to see whether
  190  * the task/callback running this routine needs to be called.
  191  */
  192 int
  193 ath_dfs_process_radar_event(struct ath_softc *sc,
  194     struct ieee80211_channel *chan)
  195 {
  196         return (0);
  197 }
  198 
  199 /*
  200  * Determine whether the DFS check task needs to be queued.
  201  *
  202  * This is called in the RX task when the current batch of packets
  203  * have been received. It will return whether there are any radar
  204  * events for ath_dfs_process_radar_event() to handle.
  205  */
  206 int
  207 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan)
  208 {
  209         return (0);
  210 }
  211 
  212 /*
  213  * Handle ioctl requests from the diagnostic interface.
  214  *
  215  * The initial part of this code resembles ath_ioctl_diag();
  216  * it's likely a good idea to reduce duplication between
  217  * these two routines.
  218  */
  219 int
  220 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad)
  221 {
  222         unsigned int id = ad->ad_id & ATH_DIAG_ID;
  223         void *indata = NULL;
  224         void *outdata = NULL;
  225         u_int32_t insize = ad->ad_in_size;
  226         u_int32_t outsize = ad->ad_out_size;
  227         int error = 0;
  228         HAL_PHYERR_PARAM peout;
  229         HAL_PHYERR_PARAM *pe;
  230 
  231         if (ad->ad_id & ATH_DIAG_IN) {
  232                 /*
  233                  * Copy in data.
  234                  */
  235                 indata = malloc(insize, M_TEMP, M_NOWAIT);
  236                 if (indata == NULL) {
  237                         error = ENOMEM;
  238                         goto bad;
  239                 }
  240                 error = copyin(ad->ad_in_data, indata, insize);
  241                 if (error)
  242                         goto bad;
  243         }
  244         if (ad->ad_id & ATH_DIAG_DYN) {
  245                 /*
  246                  * Allocate a buffer for the results (otherwise the HAL
  247                  * returns a pointer to a buffer where we can read the
  248                  * results).  Note that we depend on the HAL leaving this
  249                  * pointer for us to use below in reclaiming the buffer;
  250                  * may want to be more defensive.
  251                  */
  252                 outdata = malloc(outsize, M_TEMP, M_NOWAIT);
  253                 if (outdata == NULL) {
  254                         error = ENOMEM;
  255                         goto bad;
  256                 }
  257         }
  258         switch (id) {
  259                 case DFS_SET_THRESH:
  260                         if (insize < sizeof(HAL_PHYERR_PARAM)) {
  261                                 error = EINVAL;
  262                                 break;
  263                         }
  264                         pe = (HAL_PHYERR_PARAM *) indata;
  265                         ath_hal_enabledfs(sc->sc_ah, pe);
  266                         break;
  267                 case DFS_GET_THRESH:
  268                         memset(&peout, 0, sizeof(peout));
  269                         outsize = sizeof(HAL_PHYERR_PARAM);
  270                         ath_hal_getdfsthresh(sc->sc_ah, &peout);
  271                         pe = (HAL_PHYERR_PARAM *) outdata;
  272                         memcpy(pe, &peout, sizeof(*pe));
  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 
  289 /*
  290  * Get the current DFS thresholds from the HAL
  291  */
  292 int
  293 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param)
  294 {
  295         ath_hal_getdfsthresh(sc->sc_ah, param);
  296         return (1);
  297 }

Cache object: 4720f3d1cda5b66961c98c66cc097975

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FreeBSD/Linux Kernel Cross Reference sys/dev/ath/ath_dfs/null/dfs_null.c

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sys/dev/ath/ath_dfs/null/dfs_null.c