1 /* $NetBSD: ld_cac.c,v 1.23 2008/12/04 11:48:14 ad 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 1.23 2008/12/04 11:48:14 ad 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(device_t, device_t, void *); 70 void ld_cac_done(device_t, void *, int); 71 int ld_cac_dump(struct ld_softc *, void *, int, int); 72 int ld_cac_match(device_t, cfdata_t, 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_NEW(ld_cac, sizeof(struct ld_cac_softc), 78 ld_cac_match, ld_cac_attach, NULL, NULL); 79 80 int 81 ld_cac_match(device_t parent, cfdata_t match, void *aux) 82 { 83 84 return (1); 85 } 86 87 void 88 ld_cac_attach(device_t parent, device_t self, void *aux) 89 { 90 struct cac_drive_info dinfo; 91 struct cac_attach_args *caca; 92 struct ld_cac_softc *sc = device_private(self); 93 struct cac_softc *cac = device_private(parent); 94 struct ld_softc *ld = &sc->sc_ld; 95 const char *type; 96 97 caca = aux; 98 ld->sc_dv = self; 99 sc->sc_mutex = &cac->sc_mutex; 100 101 if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo), 102 sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) { 103 aprint_error(": CMD_GET_LOG_DRV_INFO failed\n"); 104 return; 105 } 106 107 ld->sc_secsize = CAC_GET2(dinfo.secsize); 108 ld->sc_maxxfer = CAC_MAX_XFER; 109 ld->sc_maxqueuecnt = CAC_MAX_CCBS / cac->sc_nunits; /* XXX */ 110 ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) * 111 CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.nsectors); 112 ld->sc_start = ld_cac_start; 113 ld->sc_dump = ld_cac_dump; 114 115 switch (CAC_GET1(dinfo.mirror)) { 116 case 0: 117 type = "standalone disk or RAID0"; 118 break; 119 case 1: 120 type = "RAID4"; 121 break; 122 case 2: 123 type = "RAID1"; 124 break; 125 case 3: 126 type = "RAID5"; 127 break; 128 default: 129 type = "unknown type of"; 130 break; 131 } 132 133 aprint_normal(": %s array\n", type); 134 135 /* XXX We should verify this... */ 136 ld->sc_flags = LDF_ENABLED; 137 ldattach(ld); 138 } 139 140 int 141 ld_cac_start(struct ld_softc *ld, struct buf *bp) 142 { 143 int flags, cmd; 144 struct cac_softc *cac; 145 struct ld_cac_softc *sc; 146 struct cac_context cc; 147 148 sc = (struct ld_cac_softc *)ld; 149 cac = device_private(device_parent(ld->sc_dv)); 150 151 cc.cc_handler = ld_cac_done; 152 cc.cc_context = bp; 153 cc.cc_dv = ld->sc_dv; 154 155 if ((bp->b_flags & B_READ) == 0) { 156 cmd = CAC_CMD_WRITE; 157 flags = CAC_CCB_DATA_OUT; 158 } else { 159 cmd = CAC_CMD_READ; 160 flags = CAC_CCB_DATA_IN; 161 } 162 163 return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit, 164 bp->b_rawblkno, flags, &cc)); 165 } 166 167 int 168 ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 169 { 170 struct ld_cac_softc *sc; 171 172 sc = (struct ld_cac_softc *)ld; 173 174 return (cac_cmd(device_private(device_parent(ld->sc_dv)), 175 CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize, 176 sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL)); 177 } 178 179 void 180 ld_cac_done(struct device *dv, void *context, int error) 181 { 182 struct buf *bp; 183 struct ld_cac_softc *sc; 184 int rv; 185 186 bp = context; 187 rv = 0; 188 sc = device_private(dv); 189 190 if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) { 191 aprint_error_dev(dv, "command rejected\n"); 192 rv = EIO; 193 } 194 if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) { 195 aprint_error_dev(dv, "invalid request block\n"); 196 rv = EIO; 197 } 198 if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) { 199 aprint_error_dev(dv, "hard error\n"); 200 rv = EIO; 201 } 202 if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) { 203 sc->sc_serrcnt++; 204 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) { 205 sc->sc_serrcnt = 0; 206 aprint_error_dev(dv, 207 "%d soft errors; array may be degraded\n", 208 sc->sc_serrcnt); 209 } 210 } 211 212 if (rv) { 213 bp->b_error = rv; 214 bp->b_resid = bp->b_bcount; 215 } else 216 bp->b_resid = 0; 217 218 mutex_exit(sc->sc_mutex); 219 lddone(&sc->sc_ld, bp); 220 mutex_enter(sc->sc_mutex); 221 } 222