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 33 /* 34 * This implements an empty DFS module. 35 */ 36 #include "opt_ath.h" 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/malloc.h> 46 #include <sys/mutex.h> 47 #include <sys/errno.h> 48 #include <sys/bus.h> 49 #include <sys/socket.h> 50 51 #include <net/if.h> 52 #include <net/if_var.h> 53 #include <net/if_media.h> 54 #include <net/if_arp.h> 55 #include <net/ethernet.h> /* XXX for ether_sprintf */ 56 57 #include <netproto/802_11/ieee80211_var.h> 58 59 #include <net/bpf.h> 60 61 #ifdef INET 62 #include <netinet/in.h> 63 #include <netinet/if_ether.h> 64 #endif 65 66 #include <machine/resource.h> 67 68 #include <dev/netif/ath/ath/if_athvar.h> 69 #include <dev/netif/ath/ath/if_athdfs.h> 70 71 #include <dev/netif/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. Return 1 if the driver should 97 * enable radar PHY errors, or 0 if not. 98 */ 99 int 100 ath_dfs_radar_enable(struct ath_softc *sc, struct ieee80211_channel *chan) 101 { 102 #if 0 103 HAL_PHYERR_PARAM pe; 104 105 /* Check if the hardware supports radar reporting */ 106 /* XXX TODO: migrate HAL_CAP_RADAR/HAL_CAP_AR to somewhere public! */ 107 if (ath_hal_getcapability(sc->sc_ah, 108 HAL_CAP_PHYDIAG, 0, NULL) != HAL_OK) 109 return (0); 110 111 /* Check if the current channel is radar-enabled */ 112 if (! IEEE80211_IS_CHAN_DFS(chan)) 113 return (0); 114 115 /* Fetch the default parameters */ 116 memset(&pe, '\0', sizeof(pe)); 117 if (! ath_hal_getdfsdefaultthresh(sc->sc_ah, &pe)) 118 return (0); 119 120 /* Enable radar PHY error reporting */ 121 sc->sc_dodfs = 1; 122 123 /* Tell the hardware to enable radar reporting */ 124 pe.pe_enabled = 1; 125 126 /* Flip on extension channel events only if doing HT40 */ 127 if (IEEE80211_IS_CHAN_HT40(chan)) 128 pe.pe_extchannel = 1; 129 else 130 pe.pe_extchannel = 0; 131 132 ath_hal_enabledfs(sc->sc_ah, &pe); 133 134 /* 135 * Disable strong signal fast diversity - needed for 136 * AR5212 and similar PHYs for reliable short pulse 137 * duration. 138 */ 139 (void) ath_hal_setcapability(sc->sc_ah, HAL_CAP_DIVERSITY, 2, 0, NULL); 140 141 return (1); 142 #else 143 return (0); 144 #endif 145 } 146 147 /* 148 * Explicity disable radar reporting. 149 * 150 * Return 0 if it was disabled, < 0 on error. 151 */ 152 int 153 ath_dfs_radar_disable(struct ath_softc *sc) 154 { 155 #if 0 156 HAL_PHYERR_PARAM pe; 157 158 (void) ath_hal_getdfsthresh(sc->sc_ah, &pe); 159 pe.pe_enabled = 0; 160 (void) ath_hal_enabledfs(sc->sc_ah, &pe); 161 return (0); 162 #else 163 return (0); 164 #endif 165 } 166 167 /* 168 * Process DFS related PHY errors 169 * 170 * The mbuf is not "ours" and if we want a copy, we have 171 * to take a copy. It'll be freed after this function returns. 172 */ 173 void 174 ath_dfs_process_phy_err(struct ath_softc *sc, struct mbuf *m, 175 uint64_t tsf, struct ath_rx_status *rxstat) 176 { 177 178 } 179 180 /* 181 * Process the radar events and determine whether a DFS event has occured. 182 * 183 * This is designed to run outside of the RX processing path. 184 * The RX path will call ath_dfs_tasklet_needed() to see whether 185 * the task/callback running this routine needs to be called. 186 */ 187 int 188 ath_dfs_process_radar_event(struct ath_softc *sc, 189 struct ieee80211_channel *chan) 190 { 191 return (0); 192 } 193 194 /* 195 * Determine whether the DFS check task needs to be queued. 196 * 197 * This is called in the RX task when the current batch of packets 198 * have been received. It will return whether there are any radar 199 * events for ath_dfs_process_radar_event() to handle. 200 */ 201 int 202 ath_dfs_tasklet_needed(struct ath_softc *sc, struct ieee80211_channel *chan) 203 { 204 return (0); 205 } 206 207 /* 208 * Handle ioctl requests from the diagnostic interface. 209 * 210 * The initial part of this code resembles ath_ioctl_diag(); 211 * it's likely a good idea to reduce duplication between 212 * these two routines. 213 */ 214 int 215 ath_ioctl_phyerr(struct ath_softc *sc, struct ath_diag *ad) 216 { 217 unsigned int id = ad->ad_id & ATH_DIAG_ID; 218 void *indata = NULL; 219 void *outdata = NULL; 220 u_int32_t insize = ad->ad_in_size; 221 u_int32_t outsize = ad->ad_out_size; 222 int error = 0; 223 HAL_PHYERR_PARAM peout; 224 HAL_PHYERR_PARAM *pe; 225 226 if (ad->ad_id & ATH_DIAG_IN) { 227 /* 228 * Copy in data. 229 */ 230 indata = malloc(insize, M_TEMP, M_NOWAIT); 231 if (indata == NULL) { 232 error = ENOMEM; 233 goto bad; 234 } 235 error = copyin(ad->ad_in_data, indata, insize); 236 if (error) 237 goto bad; 238 } 239 if (ad->ad_id & ATH_DIAG_DYN) { 240 /* 241 * Allocate a buffer for the results (otherwise the HAL 242 * returns a pointer to a buffer where we can read the 243 * results). Note that we depend on the HAL leaving this 244 * pointer for us to use below in reclaiming the buffer; 245 * may want to be more defensive. 246 */ 247 outdata = malloc(outsize, M_TEMP, M_NOWAIT); 248 if (outdata == NULL) { 249 error = ENOMEM; 250 goto bad; 251 } 252 } 253 switch (id) { 254 case DFS_SET_THRESH: 255 if (insize < sizeof(HAL_PHYERR_PARAM)) { 256 error = EINVAL; 257 break; 258 } 259 pe = (HAL_PHYERR_PARAM *) indata; 260 ath_hal_enabledfs(sc->sc_ah, pe); 261 break; 262 case DFS_GET_THRESH: 263 memset(&peout, 0, sizeof(peout)); 264 outsize = sizeof(HAL_PHYERR_PARAM); 265 ath_hal_getdfsthresh(sc->sc_ah, &peout); 266 pe = (HAL_PHYERR_PARAM *) outdata; 267 memcpy(pe, &peout, sizeof(*pe)); 268 break; 269 default: 270 error = EINVAL; 271 } 272 if (outsize < ad->ad_out_size) 273 ad->ad_out_size = outsize; 274 if (outdata && copyout(outdata, ad->ad_out_data, ad->ad_out_size)) 275 error = EFAULT; 276 bad: 277 if ((ad->ad_id & ATH_DIAG_IN) && indata != NULL) 278 free(indata, M_TEMP); 279 if ((ad->ad_id & ATH_DIAG_DYN) && outdata != NULL) 280 free(outdata, M_TEMP); 281 return (error); 282 } 283 284 /* 285 * Get the current DFS thresholds from the HAL 286 */ 287 int 288 ath_dfs_get_thresholds(struct ath_softc *sc, HAL_PHYERR_PARAM *param) 289 { 290 ath_hal_getdfsthresh(sc->sc_ah, param); 291 return (1); 292 } 293