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, MERCHANTABILITY 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/errno.h> 48 49 #if defined(__DragonFly__) 50 /* empty */ 51 #else 52 #include <machine/bus.h> 53 #include <machine/resource.h> 54 #endif 55 #include <sys/bus.h> 56 57 #include <sys/socket.h> 58 59 #include <net/if.h> 60 #include <net/if_var.h> 61 #include <net/if_media.h> 62 #include <net/if_arp.h> 63 #include <net/ethernet.h> /* XXX for ether_sprintf */ 64 65 #include <netproto/802_11/ieee80211_var.h> 66 67 #include <net/bpf.h> 68 69 #ifdef INET 70 #include <netinet/in.h> 71 #include <netinet/if_ether.h> 72 #endif 73 74 #include <dev/netif/ath/ath/if_athvar.h> 75 #include <dev/netif/ath/ath/if_athdfs.h> 76 77 #include <dev/netif/ath/ath_hal/ah_desc.h> 78 79 /* 80 * Methods which are required 81 */ 82 83 /* 84 * Attach DFS to the given interface 85 */ 86 int 87 ath_dfs_attach(struct ath_softc *sc) 88 { 89 return (1); 90 } 91 92 /* 93 * Detach DFS from the given interface 94 */ 95 int 96 ath_dfs_detach(struct ath_softc *sc) 97 { 98 return (1); 99 } 100 101 /* 102 * Enable radar check. Return 1 if the driver should 103 * enable radar PHY errors, or 0 if not. 104 */ 105 int 106 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan) 107 { 108 #if 0 109 HAL_PHYERR_PARAM pe; 110 111 /* Check if the hardware supports radar reporting */ 112 /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */ 113 if (ath_hal_getcapability(sc->sc_ah, 114 HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK) 115 return (0); 116 117 /* Check if the current channel is radar-enabled */ 118 if (! IEEE80211_IS_CHAN_DFS(chan)) 119 return (0); 120 121 /* Fetch the default parameters */ 122 memset(&pe, '\0', sizeof(pe)); 123 if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe)) 124 return (0); 125 126 /* Enable radar PHY error reporting */ 127 sc->sc_dodfs = 1; 128 129 /* Tell the hardware to enable radar reporting */ 130 pe.pe_enabled = 1; 131 132 /* Flip on extension channel events only if doing HT40 */ 133 if (IEEE80211_IS_CHAN_HT40(chan)) 134 pe.pe_extchannel = 1; 135 else 136 pe.pe_extchannel = 0; 137 138 ath_hal_enabledfs(sc->sc_ah, &pe); 139 140 /* 141 * Disable strong signal fast diversity - needed for 142 * AR5212 and similar PHYs for reliable short pulse 143 * duration. 144 */ 145 (void) ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY, 2, 0, NULL); 146 147 return (1); 148 #else 149 return (0); 150 #endif 151 } 152 153 /* 154 * Explicity disable radar reporting. 155 * 156 * Return 0 if it was disabled, < 0 on error. 157 */ 158 int 159 ath_dfs_radar_disable(struct ath_softc *sc) 160 { 161 #if 0 162 HAL_PHYERR_PARAM pe; 163 164 (void) ath_hal_getdfsthresh(sc->sc_ah, &pe); 165 pe.pe_enabled = 0; 166 (void) ath_hal_enabledfs(sc->sc_ah, &pe); 167 return (0); 168 #else 169 return (0); 170 #endif 171 } 172 173 /* 174 * Process DFS related PHY errors 175 * 176 * The mbuf is not "ours" and if we want a copy, we have 177 * to take a copy. It'll be freed after this function returns. 178 */ 179 void 180 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m, 181 uint64_t tsf, struct ath_rx_status *rxstat) 182 { 183 184 } 185 186 /* 187 * Process the radar events and determine whether a DFS event has occurred. 188 * 189 * This is designed to run outside of the RX processing path. 190 * The RX path will call ath_dfs_tasklet_needed() to see whether 191 * the task/callback running this routine needs to be called. 192 */ 193 int 194 ath_dfs_process_radar_event(struct ath_softc *sc, 195 struct ieee80211_channel *chan) 196 { 197 return (0); 198 } 199 200 /* 201 * Determine whether the DFS check task needs to be queued. 202 * 203 * This is called in the RX task when the current batch of packets 204 * have been received. It will return whether there are any radar 205 * events for ath_dfs_process_radar_event() to handle. 206 */ 207 int 208 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 209 { 210 return (0); 211 } 212 213 /* 214 * Handle ioctl requests from the diagnostic interface. 215 * 216 * The initial part of this code resembles ath_ioctl_diag(); 217 * it's likely a good idea to reduce duplication between 218 * these two routines. 219 */ 220 int 221 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 222 { 223 unsigned int id = ad->ad_id & ATH_DIAG_ID; 224 void *indata = NULL; 225 void *outdata = NULL; 226 u_int32_t insize = ad->ad_in_size; 227 u_int32_t outsize = ad->ad_out_size; 228 int error = 0; 229 HAL_PHYERR_PARAM peout; 230 HAL_PHYERR_PARAM *pe; 231 232 if (ad->ad_id & ATH_DIAG_IN) { 233 /* 234 * Copy in data. 235 */ 236 indata = kmalloc(insize, M_TEMP, M_INTWAIT); 237 if (indata == NULL) { 238 error = ENOMEM; 239 goto bad; 240 } 241 error = copyin(ad->ad_in_data, indata, insize); 242 if (error) 243 goto bad; 244 } 245 if (ad->ad_id & ATH_DIAG_DYN) { 246 /* 247 * Allocate a buffer for the results (otherwise the HAL 248 * returns a pointer to a buffer where we can read the 249 * results). Note that we depend on the HAL leaving this 250 * pointer for us to use below in reclaiming the buffer; 251 * may want to be more defensive. 252 */ 253 outdata = kmalloc(outsize, M_TEMP, M_INTWAIT); 254 if (outdata == NULL) { 255 error = ENOMEM; 256 goto bad; 257 } 258 } 259 switch (id) { 260 case DFS_SET_THRESH: 261 if (insize < sizeof(HAL_PHYERR_PARAM)) { 262 error = EINVAL; 263 break; 264 } 265 pe = (HAL_PHYERR_PARAM *) indata; 266 ath_hal_enabledfs(sc->sc_ah, pe); 267 break; 268 case DFS_GET_THRESH: 269 memset(&peout, 0, sizeof(peout)); 270 outsize = sizeof(HAL_PHYERR_PARAM); 271 ath_hal_getdfsthresh(sc->sc_ah, &peout); 272 pe = (HAL_PHYERR_PARAM *) outdata; 273 memcpy(pe, &peout, sizeof(*pe)); 274 break; 275 default: 276 error = EINVAL; 277 } 278 if (outsize < ad->ad_out_size) 279 ad->ad_out_size = outsize; 280 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 281 error = EFAULT; 282 bad: 283 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 284 kfree(indata, M_TEMP); 285 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 286 kfree(outdata, M_TEMP); 287 return (error); 288 } 289 290 /* 291 * Get the current DFS thresholds from the HAL 292 */ 293 int 294 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 295 { 296 ath_hal_getdfsthresh(sc->sc_ah, param); 297 return (1); 298 } 299 300 #if defined(__DragonFly__) 301 /* 302 * Module glue. 303 */ 304 static int 305 null_dfs_modevent(module_t mod, int type, void *unused) 306 { 307 int error; 308 309 wlan_serialize_enter(); 310 311 switch (type) { 312 case MOD_LOAD: 313 if (bootverbose) { 314 kprintf("ath_dfs: WTF module\n"); 315 } 316 error = 0; 317 break; 318 case MOD_UNLOAD: 319 error = 0; 320 break; 321 default: 322 error = EINVAL; 323 break; 324 } 325 wlan_serialize_exit(); 326 327 return error; 328 } 329 330 static moduledata_t null_dfs_mod = { 331 "ath_dfs", 332 null_dfs_modevent, 333 0 334 }; 335 336 DECLARE_MODULE(ath_dfs, null_dfs_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 337 MODULE_VERSION(ath_dfs, 1); 338 339 #endif 340