1 /* $NetBSD: ld_cac.c,v 1.31 2017/08/09 16:44:40 mlelstv 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 1.31 2017/08/09 16:44:40 mlelstv 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 *, int, 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, int blkno, int blkcnt) 167 { 168 struct ld_cac_softc *sc; 169 170 sc = (struct ld_cac_softc *)ld; 171 172 return (cac_cmd(device_private(device_parent(ld->sc_dv)), 173 CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize, 174 sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL)); 175 } 176 177 void 178 ld_cac_done(device_t dv, void *context, int error) 179 { 180 struct buf *bp; 181 struct ld_cac_softc *sc; 182 int rv; 183 184 bp = context; 185 rv = 0; 186 sc = device_private(dv); 187 188 if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) { 189 aprint_error_dev(dv, "command rejected\n"); 190 rv = EIO; 191 } 192 if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) { 193 aprint_error_dev(dv, "invalid request block\n"); 194 rv = EIO; 195 } 196 if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) { 197 aprint_error_dev(dv, "hard error\n"); 198 rv = EIO; 199 } 200 if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) { 201 sc->sc_serrcnt++; 202 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) { 203 sc->sc_serrcnt = 0; 204 aprint_error_dev(dv, 205 "%d soft errors; array may be degraded\n", 206 sc->sc_serrcnt); 207 } 208 } 209 210 if (rv) { 211 bp->b_error = rv; 212 bp->b_resid = bp->b_bcount; 213 } else 214 bp->b_resid = 0; 215 216 mutex_exit(sc->sc_mutex); 217 lddone(&sc->sc_ld, bp); 218 mutex_enter(sc->sc_mutex); 219 } 220 221 MODULE(MODULE_CLASS_DRIVER, ld_cac, "ld,cac"); 222 223 #ifdef _MODULE 224 /* 225 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 226 * XXX it will be defined in the common-code module 227 */ 228 #undef CFDRIVER_DECL 229 #define CFDRIVER_DECL(name, class, attr) 230 #include "ioconf.c" 231 #endif 232 233 static int 234 ld_cac_modcmd(modcmd_t cmd, void *opaque) 235 { 236 int error = 0; 237 #ifdef _MODULE 238 /* 239 * We ignore the cfdriver_vec[] that ioconf provides, since 240 * the cfdrivers are attached already. 241 */ 242 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 243 #endif 244 245 #ifdef _MODULE 246 switch (cmd) { 247 case MODULE_CMD_INIT: 248 error = config_init_component(no_cfdriver_vec, 249 cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac); 250 break; 251 case MODULE_CMD_FINI: 252 error = config_fini_component(no_cfdriver_vec, 253 cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac); 254 break; 255 default: 256 error = ENOTTY; 257 break; 258 } 259 #endif 260 261 return error; 262 } 263