1 /* $NetBSD: ld_cac.c,v 1.28 2015/04/13 16:33:24 riastradh 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 1.28 2015/04/13 16:33:24 riastradh 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 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 struct ld_cac_softc { 57 struct ld_softc sc_ld; 58 kmutex_t *sc_mutex; 59 int sc_hwunit; 60 int sc_serrcnt; 61 struct timeval sc_serrtm; 62 }; 63 64 void ld_cac_attach(device_t, device_t, void *); 65 void ld_cac_done(device_t, void *, int); 66 int ld_cac_dump(struct ld_softc *, void *, int, int); 67 int ld_cac_match(device_t, cfdata_t, void *); 68 int ld_cac_start(struct ld_softc *, struct buf *); 69 70 static const struct timeval ld_cac_serrintvl = { 60, 0 }; 71 72 CFATTACH_DECL_NEW(ld_cac, sizeof(struct ld_cac_softc), 73 ld_cac_match, ld_cac_attach, NULL, NULL); 74 75 int 76 ld_cac_match(device_t parent, cfdata_t match, void *aux) 77 { 78 79 return (1); 80 } 81 82 void 83 ld_cac_attach(device_t parent, device_t self, void *aux) 84 { 85 struct cac_drive_info dinfo; 86 struct cac_attach_args *caca; 87 struct ld_cac_softc *sc = device_private(self); 88 struct cac_softc *cac = device_private(parent); 89 struct ld_softc *ld = &sc->sc_ld; 90 const char *type; 91 92 caca = aux; 93 ld->sc_dv = self; 94 sc->sc_mutex = &cac->sc_mutex; 95 sc->sc_hwunit = caca->caca_unit; 96 97 if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo), 98 sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) { 99 aprint_error(": CMD_GET_LOG_DRV_INFO failed\n"); 100 return; 101 } 102 103 ld->sc_secsize = CAC_GET2(dinfo.secsize); 104 ld->sc_maxxfer = CAC_MAX_XFER; 105 ld->sc_maxqueuecnt = (CAC_MAX_CCBS - 1) / cac->sc_nunits; 106 ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) * 107 CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.nsectors); 108 ld->sc_start = ld_cac_start; 109 ld->sc_dump = ld_cac_dump; 110 111 switch (CAC_GET1(dinfo.mirror)) { 112 case 0: 113 type = "standalone disk or RAID0"; 114 break; 115 case 1: 116 type = "RAID4"; 117 break; 118 case 2: 119 type = "RAID1"; 120 break; 121 case 3: 122 type = "RAID5"; 123 break; 124 default: 125 type = "unknown type of"; 126 break; 127 } 128 129 aprint_normal(": %s array\n", type); 130 131 /* XXX We should verify this... */ 132 ld->sc_flags = LDF_ENABLED; 133 ldattach(ld); 134 } 135 136 int 137 ld_cac_start(struct ld_softc *ld, struct buf *bp) 138 { 139 int flags, cmd; 140 struct cac_softc *cac; 141 struct ld_cac_softc *sc; 142 struct cac_context cc; 143 144 sc = (struct ld_cac_softc *)ld; 145 cac = device_private(device_parent(ld->sc_dv)); 146 147 cc.cc_handler = ld_cac_done; 148 cc.cc_context = bp; 149 cc.cc_dv = ld->sc_dv; 150 151 if ((bp->b_flags & B_READ) == 0) { 152 cmd = CAC_CMD_WRITE; 153 flags = CAC_CCB_DATA_OUT; 154 } else { 155 cmd = CAC_CMD_READ; 156 flags = CAC_CCB_DATA_IN; 157 } 158 159 return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit, 160 bp->b_rawblkno, flags, &cc)); 161 } 162 163 int 164 ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 165 { 166 struct ld_cac_softc *sc; 167 168 sc = (struct ld_cac_softc *)ld; 169 170 return (cac_cmd(device_private(device_parent(ld->sc_dv)), 171 CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize, 172 sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL)); 173 } 174 175 void 176 ld_cac_done(device_t dv, void *context, int error) 177 { 178 struct buf *bp; 179 struct ld_cac_softc *sc; 180 int rv; 181 182 bp = context; 183 rv = 0; 184 sc = device_private(dv); 185 186 if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) { 187 aprint_error_dev(dv, "command rejected\n"); 188 rv = EIO; 189 } 190 if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) { 191 aprint_error_dev(dv, "invalid request block\n"); 192 rv = EIO; 193 } 194 if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) { 195 aprint_error_dev(dv, "hard error\n"); 196 rv = EIO; 197 } 198 if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) { 199 sc->sc_serrcnt++; 200 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) { 201 sc->sc_serrcnt = 0; 202 aprint_error_dev(dv, 203 "%d soft errors; array may be degraded\n", 204 sc->sc_serrcnt); 205 } 206 } 207 208 if (rv) { 209 bp->b_error = rv; 210 bp->b_resid = bp->b_bcount; 211 } else 212 bp->b_resid = 0; 213 214 mutex_exit(sc->sc_mutex); 215 lddone(&sc->sc_ld, bp); 216 mutex_enter(sc->sc_mutex); 217 } 218