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 int 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 (0); 104 105 /* 106 * Enabling the radar parameters and setting sc->sc_dodfs = 1 107 * would occur here. 108 */ 109 110 return (1); 111 } 112 113 /* 114 * Process DFS related PHY errors 115 */ 116 void 117 ath_dfs_process_phy_err(struct ath_softc *sc, const char *buf, 118 uint64_t tsf, struct ath_rx_status *rxstat) 119 { 120 121 } 122 123 /* 124 * Process the radar events and determine whether a DFS event has occured. 125 * 126 * This is designed to run outside of the RX processing path. 127 * The RX path will call ath_dfs_tasklet_needed() to see whether 128 * the task/callback running this routine needs to be called. 129 */ 130 int 131 ath_dfs_process_radar_event(struct ath_softc *sc, 132 struct ieee80211_channel *chan) 133 { 134 return 0; 135 } 136 137 /* 138 * Determine whether the DFS check task needs to be queued. 139 * 140 * This is called in the RX task when the current batch of packets 141 * have been received. It will return whether there are any radar 142 * events for ath_dfs_process_radar_event() to handle. 143 */ 144 int 145 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 146 { 147 return 0; 148 } 149 150 /* 151 * Handle ioctl requests from the diagnostic interface. 152 * 153 * The initial part of this code resembles ath_ioctl_diag(); 154 * it's likely a good idea to reduce duplication between 155 * these two routines. 156 */ 157 int 158 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 159 { 160 unsigned int id = ad->ad_id & ATH_DIAG_ID; 161 void *indata = NULL; 162 void *outdata = NULL; 163 u_int32_t insize = ad->ad_in_size; 164 u_int32_t outsize = ad->ad_out_size; 165 int error = 0; 166 HAL_PHYERR_PARAM peout; 167 HAL_PHYERR_PARAM *pe; 168 169 if (ad->ad_id & ATH_DIAG_IN) { 170 /* 171 * Copy in data. 172 */ 173 indata = malloc(insize, M_TEMP, M_NOWAIT); 174 if (indata == NULL) { 175 error = ENOMEM; 176 goto bad; 177 } 178 error = copyin(ad->ad_in_data, indata, insize); 179 if (error) 180 goto bad; 181 } 182 if (ad->ad_id & ATH_DIAG_DYN) { 183 /* 184 * Allocate a buffer for the results (otherwise the HAL 185 * returns a pointer to a buffer where we can read the 186 * results). Note that we depend on the HAL leaving this 187 * pointer for us to use below in reclaiming the buffer; 188 * may want to be more defensive. 189 */ 190 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 191 if (outdata == NULL) { 192 error = ENOMEM; 193 goto bad; 194 } 195 } 196 switch (id) { 197 case DFS_SET_THRESH: 198 if (insize < sizeof(HAL_PHYERR_PARAM)) { 199 error = EINVAL; 200 break; 201 } 202 pe = (HAL_PHYERR_PARAM *) indata; 203 ath_hal_enabledfs(sc->sc_ah, pe); 204 break; 205 case DFS_GET_THRESH: 206 memset(&peout, 0, sizeof(peout)); 207 outsize = sizeof(HAL_PHYERR_PARAM); 208 ath_hal_getdfsthresh(sc->sc_ah, &peout); 209 pe = (HAL_PHYERR_PARAM *) outdata; 210 memcpy(pe, &peout, sizeof(*pe)); 211 break; 212 default: 213 error = EINVAL; 214 } 215 if (outsize < ad->ad_out_size) 216 ad->ad_out_size = outsize; 217 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 218 error = EFAULT; 219 bad: 220 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 221 free(indata, M_TEMP); 222 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 223 free(outdata, M_TEMP); 224 return error; 225 } 226 227 /* 228 * Get the current DFS thresholds from the HAL 229 */ 230 int 231 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 232 { 233 ath_hal_getdfsthresh(sc->sc_ah, param); 234 return 1; 235 } 236