1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011 Adrian Chadd, Xenion Pty Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer, 12 * without modification. 13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 14 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any 15 * redistribution must be conditioned upon including a substantially 16 * similar Disclaimer requirement for further binary redistribution. 17 * 18 * NO WARRANTY 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY 22 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 23 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, 24 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 27 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 29 * THE POSSIBILITY OF SUCH DAMAGES. 30 * 31 * $FreeBSD$ 32 */ 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * This implements an empty DFS module. 38 */ 39 #include "opt_ath.h" 40 #include "opt_inet.h" 41 #include "opt_wlan.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/sysctl.h> 46 #include <sys/kernel.h> 47 #include <sys/lock.h> 48 #include <sys/malloc.h> 49 #include <sys/mutex.h> 50 #include <sys/errno.h> 51 52 #include <machine/bus.h> 53 #include <machine/resource.h> 54 #include <sys/bus.h> 55 56 #include <sys/socket.h> 57 58 #include <net/if.h> 59 #include <net/if_var.h> 60 #include <net/if_media.h> 61 #include <net/if_arp.h> 62 #include <net/ethernet.h> /* XXX for ether_sprintf */ 63 64 #include <net80211/ieee80211_var.h> 65 66 #include <net/bpf.h> 67 68 #ifdef INET 69 #include <netinet/in.h> 70 #include <netinet/if_ether.h> 71 #endif 72 73 #include <dev/ath/if_athvar.h> 74 #include <dev/ath/if_athdfs.h> 75 76 #include <dev/ath/ath_hal/ah_desc.h> 77 78 /* 79 * Methods which are required 80 */ 81 82 /* 83 * Attach DFS to the given interface 84 */ 85 int 86 ath_dfs_attach(struct ath_softc *sc) 87 { 88 return (1); 89 } 90 91 /* 92 * Detach DFS from the given interface 93 */ 94 int 95 ath_dfs_detach(struct ath_softc *sc) 96 { 97 return (1); 98 } 99 100 /* 101 * Enable radar check. Return 1 if the driver should 102 * enable radar PHY errors, or 0 if not. 103 */ 104 int 105 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan) 106 { 107 #if 1 108 HAL_PHYERR_PARAM pe; 109 110 /* Check if the hardware supports radar reporting */ 111 /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */ 112 if (ath_hal_getcapability(sc->sc_ah, 113 HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK) 114 return (0); 115 116 /* Check if the current channel is radar-enabled */ 117 if (! IEEE80211_IS_CHAN_DFS(chan)) 118 return (0); 119 120 /* Fetch the default parameters */ 121 memset(&pe, '\0', sizeof(pe)); 122 if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe)) 123 return (0); 124 125 /* Enable radar PHY error reporting */ 126 sc->sc_dodfs = 1; 127 128 /* Tell the hardware to enable radar reporting */ 129 pe.pe_enabled = 1; 130 131 /* Flip on extension channel events only if doing HT40 */ 132 if (IEEE80211_IS_CHAN_HT40(chan)) 133 pe.pe_extchannel = 1; 134 else 135 pe.pe_extchannel = 0; 136 137 ath_hal_enabledfs(sc->sc_ah, &pe); 138 139 /* 140 * Disable strong signal fast diversity - needed for 141 * AR5212 and similar PHYs for reliable short pulse 142 * duration. 143 */ 144 (void) ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY, 2, 0, NULL); 145 146 return (1); 147 #else 148 return (0); 149 #endif 150 } 151 152 /* 153 * Explicity disable radar reporting. 154 * 155 * Return 0 if it was disabled, < 0 on error. 156 */ 157 int 158 ath_dfs_radar_disable(struct ath_softc *sc) 159 { 160 #if 1 161 HAL_PHYERR_PARAM pe; 162 163 (void) ath_hal_getdfsthresh(sc->sc_ah, &pe); 164 pe.pe_enabled = 0; 165 (void) ath_hal_enabledfs(sc->sc_ah, &pe); 166 return (0); 167 #else 168 return (0); 169 #endif 170 } 171 172 /* 173 * Process DFS related PHY errors 174 * 175 * The mbuf is not "ours" and if we want a copy, we have 176 * to take a copy. It'll be freed after this function returns. 177 */ 178 void 179 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m, 180 uint64_t tsf, struct ath_rx_status *rxstat) 181 { 182 183 } 184 185 /* 186 * Process the radar events and determine whether a DFS event has occurred. 187 * 188 * This is designed to run outside of the RX processing path. 189 * The RX path will call ath_dfs_tasklet_needed() to see whether 190 * the task/callback running this routine needs to be called. 191 */ 192 int 193 ath_dfs_process_radar_event(struct ath_softc *sc, 194 struct ieee80211_channel *chan) 195 { 196 return (0); 197 } 198 199 /* 200 * Determine whether the DFS check task needs to be queued. 201 * 202 * This is called in the RX task when the current batch of packets 203 * have been received. It will return whether there are any radar 204 * events for ath_dfs_process_radar_event() to handle. 205 */ 206 int 207 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 208 { 209 return (0); 210 } 211 212 /* 213 * Handle ioctl requests from the diagnostic interface. 214 * 215 * The initial part of this code resembles ath_ioctl_diag(); 216 * it's likely a good idea to reduce duplication between 217 * these two routines. 218 */ 219 int 220 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 221 { 222 unsigned int id = ad->ad_id & ATH_DIAG_ID; 223 void *indata = NULL; 224 void *outdata = NULL; 225 u_int32_t insize = ad->ad_in_size; 226 u_int32_t outsize = ad->ad_out_size; 227 int error = 0; 228 HAL_PHYERR_PARAM peout; 229 HAL_PHYERR_PARAM *pe; 230 231 if (ad->ad_id & ATH_DIAG_IN) { 232 /* 233 * Copy in data. 234 */ 235 indata = malloc(insize, M_TEMP, M_NOWAIT); 236 if (indata == NULL) { 237 error = ENOMEM; 238 goto bad; 239 } 240 error = copyin(ad->ad_in_data, indata, insize); 241 if (error) 242 goto bad; 243 } 244 if (ad->ad_id & ATH_DIAG_DYN) { 245 /* 246 * Allocate a buffer for the results (otherwise the HAL 247 * returns a pointer to a buffer where we can read the 248 * results). Note that we depend on the HAL leaving this 249 * pointer for us to use below in reclaiming the buffer; 250 * may want to be more defensive. 251 */ 252 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 253 if (outdata == NULL) { 254 error = ENOMEM; 255 goto bad; 256 } 257 } 258 switch (id) { 259 case DFS_SET_THRESH: 260 if (insize < sizeof(HAL_PHYERR_PARAM)) { 261 error = EINVAL; 262 break; 263 } 264 pe = (HAL_PHYERR_PARAM *) indata; 265 ath_hal_enabledfs(sc->sc_ah, pe); 266 break; 267 case DFS_GET_THRESH: 268 memset(&peout, 0, sizeof(peout)); 269 outsize = sizeof(HAL_PHYERR_PARAM); 270 ath_hal_getdfsthresh(sc->sc_ah, &peout); 271 pe = (HAL_PHYERR_PARAM *) outdata; 272 memcpy(pe, &peout, sizeof(*pe)); 273 break; 274 default: 275 error = EINVAL; 276 } 277 if (outsize < ad->ad_out_size) 278 ad->ad_out_size = outsize; 279 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 280 error = EFAULT; 281 bad: 282 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 283 free(indata, M_TEMP); 284 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 285 free(outdata, M_TEMP); 286 return (error); 287 } 288 289 /* 290 * Get the current DFS thresholds from the HAL 291 */ 292 int 293 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 294 { 295 ath_hal_getdfsthresh(sc->sc_ah, param); 296 return (1); 297 } 298