1 /* $NetBSD: ld_cac.c,v 1.27 2012/02/24 18:04:51 mhitch 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 1.27 2012/02/24 18:04:51 mhitch 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/rnd.h> 49 50 #include <sys/bus.h> 51 52 #include <dev/ldvar.h> 53 54 #include <dev/ic/cacreg.h> 55 #include <dev/ic/cacvar.h> 56 57 struct ld_cac_softc { 58 struct ld_softc sc_ld; 59 kmutex_t *sc_mutex; 60 int sc_hwunit; 61 int sc_serrcnt; 62 struct timeval sc_serrtm; 63 }; 64 65 void ld_cac_attach(device_t, device_t, void *); 66 void ld_cac_done(device_t, void *, int); 67 int ld_cac_dump(struct ld_softc *, void *, int, int); 68 int ld_cac_match(device_t, cfdata_t, void *); 69 int ld_cac_start(struct ld_softc *, struct buf *); 70 71 static const struct timeval ld_cac_serrintvl = { 60, 0 }; 72 73 CFATTACH_DECL_NEW(ld_cac, sizeof(struct ld_cac_softc), 74 ld_cac_match, ld_cac_attach, NULL, NULL); 75 76 int 77 ld_cac_match(device_t parent, cfdata_t match, void *aux) 78 { 79 80 return (1); 81 } 82 83 void 84 ld_cac_attach(device_t parent, device_t self, void *aux) 85 { 86 struct cac_drive_info dinfo; 87 struct cac_attach_args *caca; 88 struct ld_cac_softc *sc = device_private(self); 89 struct cac_softc *cac = device_private(parent); 90 struct ld_softc *ld = &sc->sc_ld; 91 const char *type; 92 93 caca = aux; 94 ld->sc_dv = self; 95 sc->sc_mutex = &cac->sc_mutex; 96 sc->sc_hwunit = caca->caca_unit; 97 98 if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo), 99 sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) { 100 aprint_error(": CMD_GET_LOG_DRV_INFO failed\n"); 101 return; 102 } 103 104 ld->sc_secsize = CAC_GET2(dinfo.secsize); 105 ld->sc_maxxfer = CAC_MAX_XFER; 106 ld->sc_maxqueuecnt = (CAC_MAX_CCBS - 1) / cac->sc_nunits; 107 ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) * 108 CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.nsectors); 109 ld->sc_start = ld_cac_start; 110 ld->sc_dump = ld_cac_dump; 111 112 switch (CAC_GET1(dinfo.mirror)) { 113 case 0: 114 type = "standalone disk or RAID0"; 115 break; 116 case 1: 117 type = "RAID4"; 118 break; 119 case 2: 120 type = "RAID1"; 121 break; 122 case 3: 123 type = "RAID5"; 124 break; 125 default: 126 type = "unknown type of"; 127 break; 128 } 129 130 aprint_normal(": %s array\n", type); 131 132 /* XXX We should verify this... */ 133 ld->sc_flags = LDF_ENABLED; 134 ldattach(ld); 135 } 136 137 int 138 ld_cac_start(struct ld_softc *ld, struct buf *bp) 139 { 140 int flags, cmd; 141 struct cac_softc *cac; 142 struct ld_cac_softc *sc; 143 struct cac_context cc; 144 145 sc = (struct ld_cac_softc *)ld; 146 cac = device_private(device_parent(ld->sc_dv)); 147 148 cc.cc_handler = ld_cac_done; 149 cc.cc_context = bp; 150 cc.cc_dv = ld->sc_dv; 151 152 if ((bp->b_flags & B_READ) == 0) { 153 cmd = CAC_CMD_WRITE; 154 flags = CAC_CCB_DATA_OUT; 155 } else { 156 cmd = CAC_CMD_READ; 157 flags = CAC_CCB_DATA_IN; 158 } 159 160 return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit, 161 bp->b_rawblkno, flags, &cc)); 162 } 163 164 int 165 ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 166 { 167 struct ld_cac_softc *sc; 168 169 sc = (struct ld_cac_softc *)ld; 170 171 return (cac_cmd(device_private(device_parent(ld->sc_dv)), 172 CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize, 173 sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL)); 174 } 175 176 void 177 ld_cac_done(device_t dv, void *context, int error) 178 { 179 struct buf *bp; 180 struct ld_cac_softc *sc; 181 int rv; 182 183 bp = context; 184 rv = 0; 185 sc = device_private(dv); 186 187 if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) { 188 aprint_error_dev(dv, "command rejected\n"); 189 rv = EIO; 190 } 191 if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) { 192 aprint_error_dev(dv, "invalid request block\n"); 193 rv = EIO; 194 } 195 if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) { 196 aprint_error_dev(dv, "hard error\n"); 197 rv = EIO; 198 } 199 if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) { 200 sc->sc_serrcnt++; 201 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) { 202 sc->sc_serrcnt = 0; 203 aprint_error_dev(dv, 204 "%d soft errors; array may be degraded\n", 205 sc->sc_serrcnt); 206 } 207 } 208 209 if (rv) { 210 bp->b_error = rv; 211 bp->b_resid = bp->b_bcount; 212 } else 213 bp->b_resid = 0; 214 215 mutex_exit(sc->sc_mutex); 216 lddone(&sc->sc_ld, bp); 217 mutex_enter(sc->sc_mutex); 218 } 219