| 1 | /* $NetBSD: ld_cac.c,v 1.30 2016/09/27 03:33:32 pgoyette 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 1.30 2016/09/27 03:33:32 pgoyette 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; |
| 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 | |