1 /*- 2 * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd 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 * This implements an empty DFS module. 36 */ 37 #include "opt_inet.h" 38 #include "opt_wlan.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/sysctl.h> 43 #include <sys/kernel.h> 44 #include <sys/lock.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_media.h> 56 #include <net/if_arp.h> 57 #include <net/ethernet.h> /* XXX for ether_sprintf */ 58 59 #include <net80211/ieee80211_var.h> 60 61 #include <net/bpf.h> 62 63 #ifdef INET 64 #include <netinet/in.h> 65 #include <netinet/if_ether.h> 66 #endif 67 68 #include <dev/ath/if_athvar.h> 69 #include <dev/ath/if_athdfs.h> 70 71 #include <dev/ath/ath_hal/ah_desc.h> 72 73 /* 74 * Methods which are required 75 */ 76 77 /* 78 * Attach DFS to the given interface 79 */ 80 int 81 ath_dfs_attach(struct ath_softc *sc) 82 { 83 return 1; 84 } 85 86 /* 87 * Detach DFS from the given interface 88 */ 89 int 90 ath_dfs_detach(struct ath_softc *sc) 91 { 92 return 1; 93 } 94 95 /* 96 * Enable radar check 97 */ 98 void 99 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan) 100 { 101 /* Check if the current channel is radar-enabled */ 102 if (! IEEE80211_IS_CHAN_DFS(chan)) 103 return; 104 } 105 106 /* 107 * Process DFS related PHY errors 108 */ 109 void 110 ath_dfs_process_phy_err(struct ath_softc *sc, const char *buf, 111 uint64_t tsf, struct ath_rx_status *rxstat) 112 { 113 114 } 115 116 /* 117 * Process the radar events and determine whether a DFS event has occured. 118 * 119 * This is designed to run outside of the RX processing path. 120 * The RX path will call ath_dfs_tasklet_needed() to see whether 121 * the task/callback running this routine needs to be called. 122 */ 123 int 124 ath_dfs_process_radar_event(struct ath_softc *sc, 125 struct ieee80211_channel *chan) 126 { 127 return 0; 128 } 129 130 /* 131 * Determine whether the DFS check task needs to be queued. 132 * 133 * This is called in the RX task when the current batch of packets 134 * have been received. It will return whether there are any radar 135 * events for ath_dfs_process_radar_event() to handle. 136 */ 137 int 138 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 139 { 140 return 0; 141 } 142 143 /* 144 * Handle ioctl requests from the diagnostic interface. 145 * 146 * The initial part of this code resembles ath_ioctl_diag(); 147 * it's likely a good idea to reduce duplication between 148 * these two routines. 149 */ 150 int 151 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 152 { 153 unsigned int id = ad->ad_id & ATH_DIAG_ID; 154 void *indata = NULL; 155 void *outdata = NULL; 156 u_int32_t insize = ad->ad_in_size; 157 u_int32_t outsize = ad->ad_out_size; 158 int error = 0; 159 HAL_PHYERR_PARAM peout; 160 HAL_PHYERR_PARAM *pe; 161 162 if (ad->ad_id & ATH_DIAG_IN) { 163 /* 164 * Copy in data. 165 */ 166 indata = malloc(insize, M_TEMP, M_NOWAIT); 167 if (indata == NULL) { 168 error = ENOMEM; 169 goto bad; 170 } 171 error = copyin(ad->ad_in_data, indata, insize); 172 if (error) 173 goto bad; 174 } 175 if (ad->ad_id & ATH_DIAG_DYN) { 176 /* 177 * Allocate a buffer for the results (otherwise the HAL 178 * returns a pointer to a buffer where we can read the 179 * results). Note that we depend on the HAL leaving this 180 * pointer for us to use below in reclaiming the buffer; 181 * may want to be more defensive. 182 */ 183 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 184 if (outdata == NULL) { 185 error = ENOMEM; 186 goto bad; 187 } 188 } 189 switch (id) { 190 case DFS_SET_THRESH: 191 if (insize < sizeof(HAL_PHYERR_PARAM)) { 192 error = EINVAL; 193 break; 194 } 195 pe = (HAL_PHYERR_PARAM *) indata; 196 ath_hal_enabledfs(sc->sc_ah, pe); 197 break; 198 case DFS_GET_THRESH: 199 memset(&peout, 0, sizeof(peout)); 200 outsize = sizeof(HAL_PHYERR_PARAM); 201 ath_hal_getdfsthresh(sc->sc_ah, &peout); 202 pe = (HAL_PHYERR_PARAM *) outdata; 203 memcpy(pe, &peout, sizeof(*pe)); 204 break; 205 default: 206 error = EINVAL; 207 } 208 if (outsize < ad->ad_out_size) 209 ad->ad_out_size = outsize; 210 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 211 error = EFAULT; 212 bad: 213 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 214 free(indata, M_TEMP); 215 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 216 free(outdata, M_TEMP); 217 return error; 218 } 219 220 /* 221 * Get the current DFS thresholds from the HAL 222 */ 223 int 224 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 225 { 226 ath_hal_getdfsthresh(sc->sc_ah, param); 227 return 1; 228 } 229