1 /*- 2 * Copyright (c) 2012 Adrian Chadd 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 "opt_ah.h" 32 #include "opt_ath.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/sysctl.h> 39 #include <sys/bus.h> 40 #include <sys/malloc.h> 41 #include <sys/proc.h> 42 #if defined(__DragonFly__) 43 /* empty */ 44 #else 45 #include <sys/pcpu.h> 46 #endif 47 #include <sys/lock.h> 48 #include <sys/mutex.h> 49 #if defined(__DragonFly__) 50 /* empty */ 51 #else 52 #include <sys/alq.h> 53 #endif 54 #include <sys/endian.h> 55 #include <sys/time.h> 56 57 #include <dev/netif/ath/ath/if_ath_alq.h> 58 59 #ifdef ATH_DEBUG_ALQ 60 static struct ale * 61 if_ath_alq_get(struct if_ath_alq *alq, int len) 62 { 63 struct ale *ale; 64 65 if (alq->sc_alq_isactive == 0) 66 return (NULL); 67 68 ale = alq_getn(alq->sc_alq_alq, len, ALQ_NOWAIT); 69 if (! ale) 70 alq->sc_alq_numlost++; 71 return (ale); 72 } 73 74 void 75 if_ath_alq_init(struct if_ath_alq *alq, const char *devname) 76 { 77 78 bzero(alq, sizeof(*alq)); 79 80 strncpy(alq->sc_alq_devname, devname, ATH_ALQ_DEVNAME_LEN); 81 kprintf("%s (%s): attached\n", __func__, alq->sc_alq_devname); 82 ksnprintf(alq->sc_alq_filename, ATH_ALQ_FILENAME_LEN, 83 "/tmp/ath_%s_alq.log", alq->sc_alq_devname); 84 85 /* XXX too conservative, right? */ 86 alq->sc_alq_qsize = (64*1024); 87 } 88 89 void 90 if_ath_alq_setcfg(struct if_ath_alq *alq, uint32_t macVer, 91 uint32_t macRev, uint32_t phyRev, uint32_t halMagic) 92 { 93 94 /* Store these in network order */ 95 alq->sc_alq_cfg.sc_mac_version = htobe32(macVer); 96 alq->sc_alq_cfg.sc_mac_revision = htobe32(macRev); 97 alq->sc_alq_cfg.sc_phy_rev = htobe32(phyRev); 98 alq->sc_alq_cfg.sc_hal_magic = htobe32(halMagic); 99 } 100 101 void 102 if_ath_alq_tidyup(struct if_ath_alq *alq) 103 { 104 105 if_ath_alq_stop(alq); 106 kprintf("%s (%s): detached\n", __func__, alq->sc_alq_devname); 107 bzero(alq, sizeof(*alq)); 108 } 109 110 int 111 if_ath_alq_start(struct if_ath_alq *alq) 112 { 113 int error; 114 115 if (alq->sc_alq_isactive) 116 return (0); 117 118 /* 119 * Create a variable-length ALQ. 120 */ 121 error = alq_open(&alq->sc_alq_alq, alq->sc_alq_filename, 122 curthread->td_ucred, ALQ_DEFAULT_CMODE, 123 alq->sc_alq_qsize, 0); 124 125 if (error != 0) { 126 kprintf("%s (%s): failed, err=%d\n", __func__, 127 alq->sc_alq_devname, error); 128 } else { 129 kprintf("%s (%s): opened\n", __func__, alq->sc_alq_devname); 130 alq->sc_alq_isactive = 1; 131 if_ath_alq_post(alq, ATH_ALQ_INIT_STATE, 132 sizeof (struct if_ath_alq_init_state), 133 (char *) &alq->sc_alq_cfg); 134 } 135 return (error); 136 } 137 138 int 139 if_ath_alq_stop(struct if_ath_alq *alq) 140 { 141 142 if (alq->sc_alq_isactive == 0) 143 return (0); 144 145 kprintf("%s (%s): closed\n", __func__, alq->sc_alq_devname); 146 147 alq->sc_alq_isactive = 0; 148 alq_close(alq->sc_alq_alq); 149 alq->sc_alq_alq = NULL; 150 151 return (0); 152 } 153 154 /* 155 * Post a debug message to the ALQ. 156 * 157 * "len" is the size of the buf payload in bytes. 158 */ 159 void 160 if_ath_alq_post(struct if_ath_alq *alq, uint16_t op, uint16_t len, 161 const char *buf) 162 { 163 struct if_ath_alq_hdr *ap; 164 struct ale *ale; 165 struct timeval tv; 166 167 if (! if_ath_alq_checkdebug(alq, op)) 168 return; 169 170 microtime(&tv); 171 172 /* 173 * Enforce some semblence of sanity on 'len'. 174 * Although strictly speaking, any length is possible - 175 * just be conservative so things don't get out of hand. 176 */ 177 if (len > ATH_ALQ_PAYLOAD_LEN) 178 len = ATH_ALQ_PAYLOAD_LEN; 179 180 ale = if_ath_alq_get(alq, len + sizeof(struct if_ath_alq_hdr)); 181 182 if (ale == NULL) 183 return; 184 185 ap = (struct if_ath_alq_hdr *) ale->ae_data; 186 ap->threadid = htobe64((uint64_t) curthread->td_tid); 187 ap->tstamp_sec = htobe32((uint32_t) tv.tv_sec); 188 ap->tstamp_usec = htobe32((uint32_t) tv.tv_usec); 189 ap->op = htobe16(op); 190 ap->len = htobe16(len); 191 192 /* 193 * Copy the payload _after_ the header field. 194 */ 195 if (buf != NULL) { 196 memcpy(((char *) ap) + sizeof(struct if_ath_alq_hdr), 197 buf, 198 len); 199 } 200 201 alq_post(alq->sc_alq_alq, ale); 202 } 203 #endif /* ATH_DEBUG */ 204