1 /* $NetBSD: ld_cac.c,v 1.21 2008/04/28 20:23:50 martin 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 1.21 2008/04/28 20:23:50 martin Exp $"); 38 39 #include "rnd.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/device.h> 45 #include <sys/buf.h> 46 #include <sys/bufq.h> 47 #include <sys/endian.h> 48 #include <sys/dkio.h> 49 #include <sys/disk.h> 50 #if NRND > 0 51 #include <sys/rnd.h> 52 #endif 53 54 #include <sys/bus.h> 55 56 #include <dev/ldvar.h> 57 58 #include <dev/ic/cacreg.h> 59 #include <dev/ic/cacvar.h> 60 61 struct ld_cac_softc { 62 struct ld_softc sc_ld; 63 kmutex_t *sc_mutex; 64 int sc_hwunit; 65 int sc_serrcnt; 66 struct timeval sc_serrtm; 67 }; 68 69 void ld_cac_attach(struct device *, struct device *, void *); 70 void ld_cac_done(struct device *, void *, int); 71 int ld_cac_dump(struct ld_softc *, void *, int, int); 72 int ld_cac_match(struct device *, struct cfdata *, void *); 73 int ld_cac_start(struct ld_softc *, struct buf *); 74 75 static const struct timeval ld_cac_serrintvl = { 60, 0 }; 76 77 CFATTACH_DECL(ld_cac, sizeof(struct ld_cac_softc), 78 ld_cac_match, ld_cac_attach, NULL, NULL); 79 80 int 81 ld_cac_match(struct device *parent, struct cfdata *match, 82 void *aux) 83 { 84 85 return (1); 86 } 87 88 void 89 ld_cac_attach(struct device *parent, struct device *self, void *aux) 90 { 91 struct cac_drive_info dinfo; 92 struct cac_attach_args *caca; 93 struct ld_softc *ld; 94 struct ld_cac_softc *sc; 95 struct cac_softc *cac; 96 const char *type; 97 98 sc = (struct ld_cac_softc *)self; 99 ld = &sc->sc_ld; 100 caca = (struct cac_attach_args *)aux; 101 sc->sc_hwunit = caca->caca_unit; 102 cac = (struct cac_softc *)parent; 103 sc->sc_mutex = &cac->sc_mutex; 104 105 if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo), 106 sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) { 107 aprint_error(": CMD_GET_LOG_DRV_INFO failed\n"); 108 return; 109 } 110 111 ld->sc_secsize = CAC_GET2(dinfo.secsize); 112 ld->sc_maxxfer = CAC_MAX_XFER; 113 ld->sc_maxqueuecnt = CAC_MAX_CCBS / cac->sc_nunits; /* XXX */ 114 ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) * 115 CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.nsectors); 116 ld->sc_start = ld_cac_start; 117 ld->sc_dump = ld_cac_dump; 118 119 switch (CAC_GET1(dinfo.mirror)) { 120 case 0: 121 type = "standalone disk or RAID0"; 122 break; 123 case 1: 124 type = "RAID4"; 125 break; 126 case 2: 127 type = "RAID1"; 128 break; 129 case 3: 130 type = "RAID5"; 131 break; 132 default: 133 type = "unknown type of"; 134 break; 135 } 136 137 aprint_normal(": %s array\n", type); 138 139 /* XXX We should verify this... */ 140 ld->sc_flags = LDF_ENABLED; 141 ldattach(ld); 142 } 143 144 int 145 ld_cac_start(struct ld_softc *ld, struct buf *bp) 146 { 147 int flags, cmd; 148 struct cac_softc *cac; 149 struct ld_cac_softc *sc; 150 struct cac_context cc; 151 152 sc = (struct ld_cac_softc *)ld; 153 cac = (struct cac_softc *)device_parent(&ld->sc_dv); 154 155 cc.cc_handler = ld_cac_done; 156 cc.cc_context = bp; 157 cc.cc_dv = &ld->sc_dv; 158 159 if ((bp->b_flags & B_READ) == 0) { 160 cmd = CAC_CMD_WRITE; 161 flags = CAC_CCB_DATA_OUT; 162 } else { 163 cmd = CAC_CMD_READ; 164 flags = CAC_CCB_DATA_IN; 165 } 166 167 return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit, 168 bp->b_rawblkno, flags, &cc)); 169 } 170 171 int 172 ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 173 { 174 struct ld_cac_softc *sc; 175 176 sc = (struct ld_cac_softc *)ld; 177 178 return (cac_cmd((struct cac_softc *)device_parent(&ld->sc_dv), 179 CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize, 180 sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL)); 181 } 182 183 void 184 ld_cac_done(struct device *dv, void *context, int error) 185 { 186 struct buf *bp; 187 struct ld_cac_softc *sc; 188 int rv; 189 190 bp = context; 191 rv = 0; 192 sc = device_private(dv); 193 194 if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) { 195 aprint_error_dev(dv, "command rejected\n"); 196 rv = EIO; 197 } 198 if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) { 199 aprint_error_dev(dv, "invalid request block\n"); 200 rv = EIO; 201 } 202 if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) { 203 aprint_error_dev(dv, "hard error\n"); 204 rv = EIO; 205 } 206 if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) { 207 sc->sc_serrcnt++; 208 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) { 209 sc->sc_serrcnt = 0; 210 aprint_error_dev(dv, "%d soft errors; array may be degraded\n", 211 sc->sc_serrcnt); 212 } 213 } 214 215 if (rv) { 216 bp->b_error = rv; 217 bp->b_resid = bp->b_bcount; 218 } else 219 bp->b_resid = 0; 220 221 mutex_exit(sc->sc_mutex); 222 lddone((struct ld_softc *)dv, bp); 223 mutex_enter(sc->sc_mutex); 224 } 225