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/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_athdfs.h> 73 74 #include <dev/ath/ath_hal/ah_desc.h> 75 76 /* 77 * Methods which are required 78 */ 79 80 /* 81 * Attach DFS to the given interface 82 */ 83 int 84 ath_dfs_attach(struct ath_softc *sc) 85 { 86 return (1); 87 } 88 89 /* 90 * Detach DFS from the given interface 91 */ 92 int 93 ath_dfs_detach(struct ath_softc *sc) 94 { 95 return (1); 96 } 97 98 /* 99 * Enable radar check. Return 1 if the driver should 100 * enable radar PHY errors, or 0 if not. 101 */ 102 int 103 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan) 104 { 105 #if 1 106 HAL_PHYERR_PARAM pe; 107 108 /* Check if the hardware supports radar reporting */ 109 /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */ 110 if (ath_hal_getcapability(sc->sc_ah, 111 HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK) 112 return (0); 113 114 /* Check if the current channel is radar-enabled */ 115 if (! IEEE80211_IS_CHAN_DFS(chan)) 116 return (0); 117 118 /* Fetch the default parameters */ 119 memset(&pe, '\0', sizeof(pe)); 120 if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe)) 121 return (0); 122 123 /* Enable radar PHY error reporting */ 124 sc->sc_dodfs = 1; 125 126 /* Tell the hardware to enable radar reporting */ 127 pe.pe_enabled = 1; 128 129 /* Flip on extension channel events only if doing HT40 */ 130 if (IEEE80211_IS_CHAN_HT40(chan)) 131 pe.pe_extchannel = 1; 132 else 133 pe.pe_extchannel = 0; 134 135 ath_hal_enabledfs(sc->sc_ah, &pe); 136 137 /* 138 * Disable strong signal fast diversity - needed for 139 * AR5212 and similar PHYs for reliable short pulse 140 * duration. 141 */ 142 (void) ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY, 2, 0, NULL); 143 144 return (1); 145 #else 146 return (0); 147 #endif 148 } 149 150 /* 151 * Explicity disable radar reporting. 152 * 153 * Return 0 if it was disabled, < 0 on error. 154 */ 155 int 156 ath_dfs_radar_disable(struct ath_softc *sc) 157 { 158 #if 1 159 HAL_PHYERR_PARAM pe; 160 161 (void) ath_hal_getdfsthresh(sc->sc_ah, &pe); 162 pe.pe_enabled = 0; 163 (void) ath_hal_enabledfs(sc->sc_ah, &pe); 164 return (0); 165 #else 166 return (0); 167 #endif 168 } 169 170 /* 171 * Process DFS related PHY errors 172 * 173 * The mbuf is not "ours" and if we want a copy, we have 174 * to take a copy. It'll be freed after this function returns. 175 */ 176 void 177 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m, 178 uint64_t tsf, struct ath_rx_status *rxstat) 179 { 180 181 } 182 183 /* 184 * Process the radar events and determine whether a DFS event has occurred. 185 * 186 * This is designed to run outside of the RX processing path. 187 * The RX path will call ath_dfs_tasklet_needed() to see whether 188 * the task/callback running this routine needs to be called. 189 */ 190 int 191 ath_dfs_process_radar_event(struct ath_softc *sc, 192 struct ieee80211_channel *chan) 193 { 194 return (0); 195 } 196 197 /* 198 * Determine whether the DFS check task needs to be queued. 199 * 200 * This is called in the RX task when the current batch of packets 201 * have been received. It will return whether there are any radar 202 * events for ath_dfs_process_radar_event() to handle. 203 */ 204 int 205 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 206 { 207 return (0); 208 } 209 210 /* 211 * Handle ioctl requests from the diagnostic interface. 212 * 213 * The initial part of this code resembles ath_ioctl_diag(); 214 * it's likely a good idea to reduce duplication between 215 * these two routines. 216 */ 217 int 218 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 219 { 220 unsigned int id = ad->ad_id & ATH_DIAG_ID; 221 void *indata = NULL; 222 void *outdata = NULL; 223 u_int32_t insize = ad->ad_in_size; 224 u_int32_t outsize = ad->ad_out_size; 225 int error = 0; 226 HAL_PHYERR_PARAM peout; 227 HAL_PHYERR_PARAM *pe; 228 229 if (ad->ad_id & ATH_DIAG_IN) { 230 /* 231 * Copy in data. 232 */ 233 indata = malloc(insize, M_TEMP, M_NOWAIT); 234 if (indata == NULL) { 235 error = ENOMEM; 236 goto bad; 237 } 238 error = copyin(ad->ad_in_data, indata, insize); 239 if (error) 240 goto bad; 241 } 242 if (ad->ad_id & ATH_DIAG_DYN) { 243 /* 244 * Allocate a buffer for the results (otherwise the HAL 245 * returns a pointer to a buffer where we can read the 246 * results). Note that we depend on the HAL leaving this 247 * pointer for us to use below in reclaiming the buffer; 248 * may want to be more defensive. 249 */ 250 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 251 if (outdata == NULL) { 252 error = ENOMEM; 253 goto bad; 254 } 255 } 256 switch (id) { 257 case DFS_SET_THRESH: 258 if (insize < sizeof(HAL_PHYERR_PARAM)) { 259 error = EINVAL; 260 break; 261 } 262 pe = (HAL_PHYERR_PARAM *) indata; 263 ath_hal_enabledfs(sc->sc_ah, pe); 264 break; 265 case DFS_GET_THRESH: 266 memset(&peout, 0, sizeof(peout)); 267 outsize = sizeof(HAL_PHYERR_PARAM); 268 ath_hal_getdfsthresh(sc->sc_ah, &peout); 269 pe = (HAL_PHYERR_PARAM *) outdata; 270 memcpy(pe, &peout, sizeof(*pe)); 271 break; 272 default: 273 error = EINVAL; 274 } 275 if (outsize < ad->ad_out_size) 276 ad->ad_out_size = outsize; 277 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 278 error = EFAULT; 279 bad: 280 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 281 free(indata, M_TEMP); 282 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 283 free(outdata, M_TEMP); 284 return (error); 285 } 286 287 /* 288 * Get the current DFS thresholds from the HAL 289 */ 290 int 291 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 292 { 293 ath_hal_getdfsthresh(sc->sc_ah, param); 294 return (1); 295 } 296