1 /* $NetBSD: ld_twe.c,v 1.37 2015/04/13 16:33:25 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001, 2002, 2003 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; and by Jason R. Thorpe of Wasabi Systems, Inc. 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 * 3ware "Escalade" RAID controller front-end for ld(4) driver. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: ld_twe.c,v 1.37 2015/04/13 16:33:25 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 #include <sys/proc.h> 49 50 #include <sys/bus.h> 51 52 #include <dev/ldvar.h> 53 54 #include <dev/pci/twereg.h> 55 #include <dev/pci/twevar.h> 56 57 struct ld_twe_softc { 58 struct ld_softc sc_ld; 59 int sc_hwunit; 60 }; 61 62 static void ld_twe_attach(device_t, device_t, void *); 63 static int ld_twe_detach(device_t, int); 64 static int ld_twe_dobio(struct ld_twe_softc *, void *, int, int, int, 65 struct buf *); 66 static int ld_twe_dump(struct ld_softc *, void *, int, int); 67 static int ld_twe_flush(struct ld_softc *, int); 68 static void ld_twe_handler(struct twe_ccb *, int); 69 static int ld_twe_match(device_t, cfdata_t, void *); 70 static int ld_twe_start(struct ld_softc *, struct buf *); 71 72 static void ld_twe_adjqparam(device_t, int); 73 74 CFATTACH_DECL_NEW(ld_twe, sizeof(struct ld_twe_softc), 75 ld_twe_match, ld_twe_attach, ld_twe_detach, NULL); 76 77 static const struct twe_callbacks ld_twe_callbacks = { 78 ld_twe_adjqparam, 79 }; 80 81 static int 82 ld_twe_match(device_t parent, cfdata_t match, void *aux) 83 { 84 85 return (1); 86 } 87 88 static void 89 ld_twe_attach(device_t parent, device_t self, void *aux) 90 { 91 struct twe_attach_args *twea = aux; 92 struct ld_twe_softc *sc = device_private(self); 93 struct ld_softc *ld = &sc->sc_ld; 94 struct twe_softc *twe = device_private(parent); 95 struct twe_drive *td = &twe->sc_units[twea->twea_unit]; 96 const char *typestr, *stripestr, *statstr; 97 char unktype[16], stripebuf[32], unkstat[32]; 98 int error; 99 uint8_t status; 100 101 ld->sc_dv = self; 102 103 twe_register_callbacks(twe, twea->twea_unit, &ld_twe_callbacks); 104 105 sc->sc_hwunit = twea->twea_unit; 106 ld->sc_flags = LDF_ENABLED; 107 ld->sc_maxxfer = twe_get_maxxfer(twe_get_maxsegs()); 108 ld->sc_secperunit = td->td_size; 109 ld->sc_secsize = TWE_SECTOR_SIZE; 110 ld->sc_maxqueuecnt = twe->sc_openings; 111 ld->sc_start = ld_twe_start; 112 ld->sc_dump = ld_twe_dump; 113 ld->sc_flush = ld_twe_flush; 114 115 typestr = twe_describe_code(twe_table_unittype, td->td_type); 116 if (typestr == NULL) { 117 snprintf(unktype, sizeof(unktype), "<0x%02x>", td->td_type); 118 typestr = unktype; 119 } 120 switch (td->td_type) { 121 case TWE_AD_CONFIG_RAID0: 122 case TWE_AD_CONFIG_RAID5: 123 case TWE_AD_CONFIG_RAID10: 124 stripestr = twe_describe_code(twe_table_stripedepth, 125 td->td_stripe); 126 if (stripestr == NULL) 127 snprintf(stripebuf, sizeof(stripebuf), 128 "<stripe code 0x%02x> ", td->td_stripe); 129 else 130 snprintf(stripebuf, sizeof(stripebuf), "%s stripe ", 131 stripestr); 132 break; 133 default: 134 stripebuf[0] = '\0'; 135 } 136 137 error = twe_param_get_1(twe, TWE_PARAM_UNITINFO + twea->twea_unit, 138 TWE_PARAM_UNITINFO_Status, &status); 139 status &= TWE_PARAM_UNITSTATUS_MASK; 140 if (error) { 141 snprintf(unkstat, sizeof(unkstat), "<unknown>"); 142 statstr = unkstat; 143 } else if ((statstr = 144 twe_describe_code(twe_table_unitstate, status)) == NULL) { 145 snprintf(unkstat, sizeof(unkstat), "<status code 0x%02x>", 146 status); 147 statstr = unkstat; 148 } 149 150 aprint_normal(": %s%s, status: %s\n", stripebuf, typestr, statstr); 151 ldattach(ld); 152 } 153 154 static int 155 ld_twe_detach(device_t self, int flags) 156 { 157 struct ld_twe_softc *sc = device_private(self); 158 struct ld_softc *ld = &sc->sc_ld; 159 int rv; 160 161 if ((rv = ldbegindetach(ld, flags)) != 0) 162 return (rv); 163 ldenddetach(ld); 164 165 return (0); 166 } 167 168 static int 169 ld_twe_dobio(struct ld_twe_softc *sc, void *data, int datasize, int blkno, 170 int dowrite, struct buf *bp) 171 { 172 struct twe_ccb *ccb; 173 struct twe_cmd *tc; 174 struct twe_softc *twe; 175 int s, rv, flags; 176 177 twe = device_private(device_parent(sc->sc_ld.sc_dv)); 178 179 flags = (dowrite ? TWE_CCB_DATA_OUT : TWE_CCB_DATA_IN); 180 if ((ccb = twe_ccb_alloc(twe, flags)) == NULL) 181 return (EAGAIN); 182 183 ccb->ccb_data = data; 184 ccb->ccb_datasize = datasize; 185 tc = ccb->ccb_cmd; 186 187 /* Build the command. */ 188 tc->tc_size = 3; 189 tc->tc_unit = sc->sc_hwunit; 190 tc->tc_count = htole16(datasize / TWE_SECTOR_SIZE); 191 tc->tc_args.io.lba = htole32(blkno); 192 193 if (dowrite) 194 tc->tc_opcode = TWE_OP_WRITE | (tc->tc_size << 5); 195 else 196 tc->tc_opcode = TWE_OP_READ | (tc->tc_size << 5); 197 198 /* Map the data transfer. */ 199 if ((rv = twe_ccb_map(twe, ccb)) != 0) { 200 twe_ccb_free(twe, ccb); 201 return (rv); 202 } 203 204 if (bp == NULL) { 205 /* 206 * Polled commands must not sit on the software queue. Wait 207 * up to 2 seconds for the command to complete. 208 */ 209 s = splbio(); 210 rv = twe_ccb_poll(twe, ccb, 2000); 211 twe_ccb_unmap(twe, ccb); 212 twe_ccb_free(twe, ccb); 213 splx(s); 214 } else { 215 ccb->ccb_tx.tx_handler = ld_twe_handler; 216 ccb->ccb_tx.tx_context = bp; 217 ccb->ccb_tx.tx_dv = sc->sc_ld.sc_dv; 218 twe_ccb_enqueue(twe, ccb); 219 rv = 0; 220 } 221 222 return (rv); 223 } 224 225 static int 226 ld_twe_start(struct ld_softc *ld, struct buf *bp) 227 { 228 229 return (ld_twe_dobio((struct ld_twe_softc *)ld, bp->b_data, 230 bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp)); 231 } 232 233 static void 234 ld_twe_handler(struct twe_ccb *ccb, int error) 235 { 236 struct buf *bp; 237 struct twe_context *tx; 238 struct ld_twe_softc *sc; 239 struct twe_softc *twe; 240 241 tx = &ccb->ccb_tx; 242 bp = tx->tx_context; 243 sc = device_private(tx->tx_dv); 244 twe = device_private(device_parent(sc->sc_ld.sc_dv)); 245 246 twe_ccb_unmap(twe, ccb); 247 twe_ccb_free(twe, ccb); 248 249 if (error) { 250 bp->b_error = error; 251 bp->b_resid = bp->b_bcount; 252 } else 253 bp->b_resid = 0; 254 255 lddone(&sc->sc_ld, bp); 256 } 257 258 static int 259 ld_twe_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 260 { 261 262 return (ld_twe_dobio((struct ld_twe_softc *)ld, data, 263 blkcnt * ld->sc_secsize, blkno, 1, NULL)); 264 } 265 266 static int 267 ld_twe_flush(struct ld_softc *ld, int flags) 268 { 269 struct ld_twe_softc *sc = (void *) ld; 270 struct twe_softc *twe = device_private(device_parent(ld->sc_dv)); 271 struct twe_ccb *ccb; 272 struct twe_cmd *tc; 273 int s, rv; 274 275 ccb = twe_ccb_alloc_wait(twe, 0); 276 KASSERT(ccb != NULL); 277 278 ccb->ccb_data = NULL; 279 ccb->ccb_datasize = 0; 280 281 tc = ccb->ccb_cmd; 282 tc->tc_size = 2; 283 tc->tc_opcode = TWE_OP_FLUSH; 284 tc->tc_unit = sc->sc_hwunit; 285 tc->tc_count = 0; 286 287 if (flags & LDFL_POLL) { 288 /* 289 * Polled commands must not sit on the software queue. Wait 290 * up to 2 seconds for the command to complete. 291 */ 292 s = splbio(); 293 rv = twe_ccb_poll(twe, ccb, 2000); 294 twe_ccb_unmap(twe, ccb); 295 twe_ccb_free(twe, ccb); 296 splx(s); 297 } else { 298 ccb->ccb_tx.tx_handler = twe_ccb_wait_handler; 299 ccb->ccb_tx.tx_context = NULL; 300 ccb->ccb_tx.tx_dv = ld->sc_dv; 301 twe_ccb_enqueue(twe, ccb); 302 303 rv = 0; 304 s = splbio(); 305 while ((ccb->ccb_flags & TWE_CCB_COMPLETE) == 0) 306 if ((rv = tsleep(ccb, PRIBIO, "tweflush", 307 60 * hz)) != 0) 308 break; 309 twe_ccb_free(twe, ccb); 310 splx(s); 311 } 312 313 return (rv); 314 } 315 316 static void 317 ld_twe_adjqparam(device_t self, int openings) 318 { 319 struct ld_twe_softc *sc = device_private(self); 320 struct ld_softc *ld = &sc->sc_ld; 321 322 ldadjqparam(ld, openings); 323 } 324