1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 Adrian Chadd 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 #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/pcpu.h> 43 #include <sys/lock.h> 44 #include <sys/mutex.h> 45 #include <sys/alq.h> 46 #include <sys/endian.h> 47 #include <sys/time.h> 48 49 #include <dev/ath/if_ath_alq.h> 50 51 #ifdef ATH_DEBUG_ALQ 52 static struct ale * 53 if_ath_alq_get(struct if_ath_alq *alq, int len) 54 { 55 struct ale *ale; 56 57 if (alq->sc_alq_isactive == 0) 58 return (NULL); 59 60 ale = alq_getn(alq->sc_alq_alq, len, ALQ_NOWAIT); 61 if (! ale) 62 alq->sc_alq_numlost++; 63 return (ale); 64 } 65 66 void 67 if_ath_alq_init(struct if_ath_alq *alq, const char *devname) 68 { 69 70 bzero(alq, sizeof(*alq)); 71 72 strncpy(alq->sc_alq_devname, devname, ATH_ALQ_DEVNAME_LEN); 73 printf("%s (%s): attached\n", __func__, alq->sc_alq_devname); 74 snprintf(alq->sc_alq_filename, ATH_ALQ_FILENAME_LEN, 75 "/tmp/ath_%s_alq.log", alq->sc_alq_devname); 76 77 /* XXX too conservative, right? */ 78 alq->sc_alq_qsize = (64*1024); 79 } 80 81 void 82 if_ath_alq_setcfg(struct if_ath_alq *alq, uint32_t macVer, 83 uint32_t macRev, uint32_t phyRev, uint32_t halMagic) 84 { 85 86 /* Store these in network order */ 87 alq->sc_alq_cfg.sc_mac_version = htobe32(macVer); 88 alq->sc_alq_cfg.sc_mac_revision = htobe32(macRev); 89 alq->sc_alq_cfg.sc_phy_rev = htobe32(phyRev); 90 alq->sc_alq_cfg.sc_hal_magic = htobe32(halMagic); 91 } 92 93 void 94 if_ath_alq_tidyup(struct if_ath_alq *alq) 95 { 96 97 if_ath_alq_stop(alq); 98 printf("%s (%s): detached\n", __func__, alq->sc_alq_devname); 99 bzero(alq, sizeof(*alq)); 100 } 101 102 int 103 if_ath_alq_start(struct if_ath_alq *alq) 104 { 105 int error; 106 107 if (alq->sc_alq_isactive) 108 return (0); 109 110 /* 111 * Create a variable-length ALQ. 112 */ 113 error = alq_open(&alq->sc_alq_alq, alq->sc_alq_filename, 114 curthread->td_ucred, ALQ_DEFAULT_CMODE, 115 alq->sc_alq_qsize, 0); 116 117 if (error != 0) { 118 printf("%s (%s): failed, err=%d\n", __func__, 119 alq->sc_alq_devname, error); 120 } else { 121 printf("%s (%s): opened\n", __func__, alq->sc_alq_devname); 122 alq->sc_alq_isactive = 1; 123 if_ath_alq_post(alq, ATH_ALQ_INIT_STATE, 124 sizeof (struct if_ath_alq_init_state), 125 (char *) &alq->sc_alq_cfg); 126 } 127 return (error); 128 } 129 130 int 131 if_ath_alq_stop(struct if_ath_alq *alq) 132 { 133 134 if (alq->sc_alq_isactive == 0) 135 return (0); 136 137 printf("%s (%s): closed\n", __func__, alq->sc_alq_devname); 138 139 alq->sc_alq_isactive = 0; 140 alq_close(alq->sc_alq_alq); 141 alq->sc_alq_alq = NULL; 142 143 return (0); 144 } 145 146 /* 147 * Post a debug message to the ALQ. 148 * 149 * "len" is the size of the buf payload in bytes. 150 */ 151 void 152 if_ath_alq_post(struct if_ath_alq *alq, uint16_t op, uint16_t len, 153 const char *buf) 154 { 155 struct if_ath_alq_hdr *ap; 156 struct ale *ale; 157 struct timeval tv; 158 159 if (! if_ath_alq_checkdebug(alq, op)) 160 return; 161 162 microtime(&tv); 163 164 /* 165 * Enforce some semblence of sanity on 'len'. 166 * Although strictly speaking, any length is possible - 167 * just be conservative so things don't get out of hand. 168 */ 169 if (len > ATH_ALQ_PAYLOAD_LEN) 170 len = ATH_ALQ_PAYLOAD_LEN; 171 172 ale = if_ath_alq_get(alq, len + sizeof(struct if_ath_alq_hdr)); 173 174 if (ale == NULL) 175 return; 176 177 ap = (struct if_ath_alq_hdr *) ale->ae_data; 178 ap->threadid = htobe64((uint64_t) curthread->td_tid); 179 ap->tstamp_sec = htobe32((uint32_t) tv.tv_sec); 180 ap->tstamp_usec = htobe32((uint32_t) tv.tv_usec); 181 ap->op = htobe16(op); 182 ap->len = htobe16(len); 183 184 /* 185 * Copy the payload _after_ the header field. 186 */ 187 if (buf != NULL) { 188 memcpy(((char *) ap) + sizeof(struct if_ath_alq_hdr), 189 buf, 190 len); 191 } 192 193 alq_post(alq->sc_alq_alq, ale); 194 } 195 #endif /* ATH_DEBUG */ 196