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_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_athdfs.h> 71 72 #include <dev/ath/ath_hal/ah_desc.h> 73 74 /* 75 * Methods which are required 76 */ 77 78 /* 79 * Attach DFS to the given interface 80 */ 81 int 82 ath_dfs_attach(struct ath_softc *sc) 83 { 84 return (1); 85 } 86 87 /* 88 * Detach DFS from the given interface 89 */ 90 int 91 ath_dfs_detach(struct ath_softc *sc) 92 { 93 return (1); 94 } 95 96 /* 97 * Enable radar check. Return 1 if the driver should 98 * enable radar PHY errors, or 0 if not. 99 */ 100 int 101 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan) 102 { 103 #if 0 104 HAL_PHYERR_PARAM pe; 105 106 /* Check if the hardware supports radar reporting */ 107 /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */ 108 if (ath_hal_getcapability(sc->sc_ah, 109 HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK) 110 return (0); 111 112 /* Check if the current channel is radar-enabled */ 113 if (! IEEE80211_IS_CHAN_DFS(chan)) 114 return (0); 115 116 /* Fetch the default parameters */ 117 memset(&pe, '\0', sizeof(pe)); 118 if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe)) 119 return (0); 120 121 /* Enable radar PHY error reporting */ 122 sc->sc_dodfs = 1; 123 124 /* Tell the hardware to enable radar reporting */ 125 pe.pe_enabled = 1; 126 127 /* Flip on extension channel events only if doing HT40 */ 128 if (IEEE80211_IS_CHAN_HT40(chan)) 129 pe.pe_extchannel = 1; 130 else 131 pe.pe_extchannel = 0; 132 133 ath_hal_enabledfs(sc->sc_ah, &pe); 134 135 return (1); 136 #else 137 return (0); 138 #endif 139 } 140 141 /* 142 * Process DFS related PHY errors 143 * 144 * The mbuf is not "ours" and if we want a copy, we have 145 * to take a copy. It'll be freed after this function returns. 146 */ 147 void 148 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m, 149 uint64_t tsf, struct ath_rx_status *rxstat) 150 { 151 152 } 153 154 /* 155 * Process the radar events and determine whether a DFS event has occured. 156 * 157 * This is designed to run outside of the RX processing path. 158 * The RX path will call ath_dfs_tasklet_needed() to see whether 159 * the task/callback running this routine needs to be called. 160 */ 161 int 162 ath_dfs_process_radar_event(struct ath_softc *sc, 163 struct ieee80211_channel *chan) 164 { 165 return (0); 166 } 167 168 /* 169 * Determine whether the DFS check task needs to be queued. 170 * 171 * This is called in the RX task when the current batch of packets 172 * have been received. It will return whether there are any radar 173 * events for ath_dfs_process_radar_event() to handle. 174 */ 175 int 176 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 177 { 178 return (0); 179 } 180 181 /* 182 * Handle ioctl requests from the diagnostic interface. 183 * 184 * The initial part of this code resembles ath_ioctl_diag(); 185 * it's likely a good idea to reduce duplication between 186 * these two routines. 187 */ 188 int 189 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 190 { 191 unsigned int id = ad->ad_id & ATH_DIAG_ID; 192 void *indata = NULL; 193 void *outdata = NULL; 194 u_int32_t insize = ad->ad_in_size; 195 u_int32_t outsize = ad->ad_out_size; 196 int error = 0; 197 HAL_PHYERR_PARAM peout; 198 HAL_PHYERR_PARAM *pe; 199 200 if (ad->ad_id & ATH_DIAG_IN) { 201 /* 202 * Copy in data. 203 */ 204 indata = malloc(insize, M_TEMP, M_NOWAIT); 205 if (indata == NULL) { 206 error = ENOMEM; 207 goto bad; 208 } 209 error = copyin(ad->ad_in_data, indata, insize); 210 if (error) 211 goto bad; 212 } 213 if (ad->ad_id & ATH_DIAG_DYN) { 214 /* 215 * Allocate a buffer for the results (otherwise the HAL 216 * returns a pointer to a buffer where we can read the 217 * results). Note that we depend on the HAL leaving this 218 * pointer for us to use below in reclaiming the buffer; 219 * may want to be more defensive. 220 */ 221 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 222 if (outdata == NULL) { 223 error = ENOMEM; 224 goto bad; 225 } 226 } 227 switch (id) { 228 case DFS_SET_THRESH: 229 if (insize < sizeof(HAL_PHYERR_PARAM)) { 230 error = EINVAL; 231 break; 232 } 233 pe = (HAL_PHYERR_PARAM *) indata; 234 ath_hal_enabledfs(sc->sc_ah, pe); 235 break; 236 case DFS_GET_THRESH: 237 memset(&peout, 0, sizeof(peout)); 238 outsize = sizeof(HAL_PHYERR_PARAM); 239 ath_hal_getdfsthresh(sc->sc_ah, &peout); 240 pe = (HAL_PHYERR_PARAM *) outdata; 241 memcpy(pe, &peout, sizeof(*pe)); 242 break; 243 default: 244 error = EINVAL; 245 } 246 if (outsize < ad->ad_out_size) 247 ad->ad_out_size = outsize; 248 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 249 error = EFAULT; 250 bad: 251 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 252 free(indata, M_TEMP); 253 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 254 free(outdata, M_TEMP); 255 return (error); 256 } 257 258 /* 259 * Get the current DFS thresholds from the HAL 260 */ 261 int 262 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 263 { 264 ath_hal_getdfsthresh(sc->sc_ah, param); 265 return (1); 266 } 267