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