1 /* $NetBSD: ld_cac.c,v 1.32 2025/04/13 02:34:03 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * 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 IN 27 * 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 THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Compaq array controller front-end for ld(4) driver. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: ld_cac.c,v 1.32 2025/04/13 02:34:03 rin Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/buf.h> 44 #include <sys/bufq.h> 45 #include <sys/endian.h> 46 #include <sys/dkio.h> 47 #include <sys/disk.h> 48 #include <sys/module.h> 49 #include <sys/bus.h> 50 51 #include <dev/ldvar.h> 52 53 #include <dev/ic/cacreg.h> 54 #include <dev/ic/cacvar.h> 55 56 #include "ioconf.h" 57 58 struct ld_cac_softc { 59 struct ld_softc sc_ld; 60 kmutex_t *sc_mutex; 61 int sc_hwunit; 62 int sc_serrcnt; 63 struct timeval sc_serrtm; 64 }; 65 66 void ld_cac_attach(device_t, device_t, void *); 67 void ld_cac_done(device_t, void *, int); 68 int ld_cac_dump(struct ld_softc *, void *, daddr_t, int); 69 int ld_cac_match(device_t, cfdata_t, void *); 70 int ld_cac_start(struct ld_softc *, struct buf *); 71 72 static const struct timeval ld_cac_serrintvl = { 60, 0 }; 73 74 CFATTACH_DECL_NEW(ld_cac, sizeof(struct ld_cac_softc), 75 ld_cac_match, ld_cac_attach, NULL, NULL); 76 77 int 78 ld_cac_match(device_t parent, cfdata_t match, void *aux) 79 { 80 81 return (1); 82 } 83 84 void 85 ld_cac_attach(device_t parent, device_t self, void *aux) 86 { 87 struct cac_drive_info dinfo; 88 struct cac_attach_args *caca; 89 struct ld_cac_softc *sc = device_private(self); 90 struct cac_softc *cac = device_private(parent); 91 struct ld_softc *ld = &sc->sc_ld; 92 const char *type; 93 94 caca = aux; 95 ld->sc_dv = self; 96 sc->sc_mutex = &cac->sc_mutex; 97 sc->sc_hwunit = caca->caca_unit; 98 99 if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo), 100 sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) { 101 aprint_error(": CMD_GET_LOG_DRV_INFO failed\n"); 102 return; 103 } 104 105 ld->sc_secsize = CAC_GET2(dinfo.secsize); 106 ld->sc_maxxfer = CAC_MAX_XFER; 107 ld->sc_maxqueuecnt = (CAC_MAX_CCBS - 1) / cac->sc_nunits; 108 ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) * 109 CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.nsectors); 110 ld->sc_start = ld_cac_start; 111 ld->sc_dump = ld_cac_dump; 112 113 switch (CAC_GET1(dinfo.mirror)) { 114 case 0: 115 type = "standalone disk or RAID0"; 116 break; 117 case 1: 118 type = "RAID4"; 119 break; 120 case 2: 121 type = "RAID1"; 122 break; 123 case 3: 124 type = "RAID5"; 125 break; 126 default: 127 type = "unknown type of"; 128 break; 129 } 130 131 aprint_normal(": %s array\n", type); 132 133 /* XXX We should verify this... */ 134 ld->sc_flags = LDF_ENABLED | LDF_MPSAFE; 135 ldattach(ld, BUFQ_DISK_DEFAULT_STRAT); 136 } 137 138 int 139 ld_cac_start(struct ld_softc *ld, struct buf *bp) 140 { 141 int flags, cmd; 142 struct cac_softc *cac; 143 struct ld_cac_softc *sc; 144 struct cac_context cc; 145 146 sc = (struct ld_cac_softc *)ld; 147 cac = device_private(device_parent(ld->sc_dv)); 148 149 cc.cc_handler = ld_cac_done; 150 cc.cc_context = bp; 151 cc.cc_dv = ld->sc_dv; 152 153 if ((bp->b_flags & B_READ) == 0) { 154 cmd = CAC_CMD_WRITE; 155 flags = CAC_CCB_DATA_OUT; 156 } else { 157 cmd = CAC_CMD_READ; 158 flags = CAC_CCB_DATA_IN; 159 } 160 161 return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit, 162 bp->b_rawblkno, flags, &cc)); 163 } 164 165 int 166 ld_cac_dump(struct ld_softc *ld, void *data, daddr_t blkno, int blkcnt) 167 { 168 struct ld_cac_softc *sc; 169 170 /* cac_cmd() takes only an 'int' as a disk address */ 171 if (blkno + blkcnt - 1 > INT_MAX) 172 return (EIO); 173 174 sc = (struct ld_cac_softc *)ld; 175 176 return (cac_cmd(device_private(device_parent(ld->sc_dv)), 177 CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize, 178 sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL)); 179 } 180 181 void 182 ld_cac_done(device_t dv, void *context, int error) 183 { 184 struct buf *bp; 185 struct ld_cac_softc *sc; 186 int rv; 187 188 bp = context; 189 rv = 0; 190 sc = device_private(dv); 191 192 if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) { 193 aprint_error_dev(dv, "command rejected\n"); 194 rv = EIO; 195 } 196 if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) { 197 aprint_error_dev(dv, "invalid request block\n"); 198 rv = EIO; 199 } 200 if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) { 201 aprint_error_dev(dv, "hard error\n"); 202 rv = EIO; 203 } 204 if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) { 205 sc->sc_serrcnt++; 206 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) { 207 sc->sc_serrcnt = 0; 208 aprint_error_dev(dv, 209 "%d soft errors; array may be degraded\n", 210 sc->sc_serrcnt); 211 } 212 } 213 214 if (rv) { 215 bp->b_error = rv; 216 bp->b_resid = bp->b_bcount; 217 } else 218 bp->b_resid = 0; 219 220 mutex_exit(sc->sc_mutex); 221 lddone(&sc->sc_ld, bp); 222 mutex_enter(sc->sc_mutex); 223 } 224 225 MODULE(MODULE_CLASS_DRIVER, ld_cac, "ld,cac"); 226 227 #ifdef _MODULE 228 /* 229 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 230 * XXX it will be defined in the common-code module 231 */ 232 #undef CFDRIVER_DECL 233 #define CFDRIVER_DECL(name, class, attr) 234 #include "ioconf.c" 235 #endif 236 237 static int 238 ld_cac_modcmd(modcmd_t cmd, void *opaque) 239 { 240 int error = 0; 241 #ifdef _MODULE 242 /* 243 * We ignore the cfdriver_vec[] that ioconf provides, since 244 * the cfdrivers are attached already. 245 */ 246 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 247 #endif 248 249 #ifdef _MODULE 250 switch (cmd) { 251 case MODULE_CMD_INIT: 252 error = config_init_component(no_cfdriver_vec, 253 cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac); 254 break; 255 case MODULE_CMD_FINI: 256 error = config_fini_component(no_cfdriver_vec, 257 cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac); 258 break; 259 default: 260 error = ENOTTY; 261 break; 262 } 263 #endif 264 265 return error; 266 } 267
Indexes created Sat Sep 20 22:09:52 GMT 2025