1 /* $NetBSD: ld_twe.c,v 1.8 2001/11/13 07:48:46 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * 3ware "Escalade" RAID controller front-end for ld(4) driver. 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: ld_twe.c,v 1.8 2001/11/13 07:48:46 lukem Exp $"); 45 46 #include "rnd.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/device.h> 52 #include <sys/buf.h> 53 #include <sys/endian.h> 54 #include <sys/dkio.h> 55 #include <sys/disk.h> 56 #if NRND > 0 57 #include <sys/rnd.h> 58 #endif 59 60 #include <machine/bus.h> 61 62 #include <dev/ldvar.h> 63 64 #include <dev/pci/twereg.h> 65 #include <dev/pci/twevar.h> 66 67 struct ld_twe_softc { 68 struct ld_softc sc_ld; 69 int sc_hwunit; 70 }; 71 72 static void ld_twe_attach(struct device *, struct device *, void *); 73 static int ld_twe_dobio(struct ld_twe_softc *, void *, int, int, int, 74 struct buf *); 75 static int ld_twe_dump(struct ld_softc *, void *, int, int); 76 static void ld_twe_handler(struct twe_ccb *, int); 77 static int ld_twe_match(struct device *, struct cfdata *, void *); 78 static int ld_twe_start(struct ld_softc *, struct buf *); 79 80 struct cfattach ld_twe_ca = { 81 sizeof(struct ld_twe_softc), ld_twe_match, ld_twe_attach 82 }; 83 84 static int 85 ld_twe_match(struct device *parent, struct cfdata *match, void *aux) 86 { 87 88 return (1); 89 } 90 91 static void 92 ld_twe_attach(struct device *parent, struct device *self, void *aux) 93 { 94 struct twe_attach_args *twea; 95 struct ld_twe_softc *sc; 96 struct ld_softc *ld; 97 struct twe_softc *twe; 98 99 sc = (struct ld_twe_softc *)self; 100 ld = &sc->sc_ld; 101 twe = (struct twe_softc *)parent; 102 twea = aux; 103 104 sc->sc_hwunit = twea->twea_unit; 105 ld->sc_flags = LDF_ENABLED; 106 ld->sc_maxxfer = TWE_MAX_XFER; 107 ld->sc_secperunit = twe->sc_dsize[twea->twea_unit]; 108 ld->sc_secsize = TWE_SECTOR_SIZE; 109 ld->sc_maxqueuecnt = (TWE_MAX_QUEUECNT - 1) / twe->sc_nunits; 110 ld->sc_start = ld_twe_start; 111 ld->sc_dump = ld_twe_dump; 112 113 printf("\n"); 114 ldattach(ld); 115 } 116 117 static int 118 ld_twe_dobio(struct ld_twe_softc *sc, void *data, int datasize, int blkno, 119 int dowrite, struct buf *bp) 120 { 121 struct twe_ccb *ccb; 122 struct twe_cmd *tc; 123 struct twe_softc *twe; 124 int s, rv, flags; 125 126 twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent; 127 128 flags = (dowrite ? TWE_CCB_DATA_OUT : TWE_CCB_DATA_IN); 129 if ((rv = twe_ccb_alloc(twe, &ccb, flags)) != 0) 130 return (rv); 131 132 ccb->ccb_data = data; 133 ccb->ccb_datasize = datasize; 134 tc = ccb->ccb_cmd; 135 136 /* Build the command. */ 137 tc->tc_size = 3; 138 tc->tc_unit = sc->sc_hwunit; 139 tc->tc_count = htole16(datasize / TWE_SECTOR_SIZE); 140 tc->tc_args.io.lba = htole32(blkno); 141 142 if (dowrite) 143 tc->tc_opcode = TWE_OP_WRITE | (tc->tc_size << 5); 144 else 145 tc->tc_opcode = TWE_OP_READ | (tc->tc_size << 5); 146 147 /* Map the data transfer. */ 148 if ((rv = twe_ccb_map(twe, ccb)) != 0) { 149 twe_ccb_free(twe, ccb); 150 return (rv); 151 } 152 153 if (bp == NULL) { 154 /* 155 * Polled commands must not sit on the software queue. Wait 156 * up to 2 seconds for the command to complete. 157 */ 158 s = splbio(); 159 rv = twe_ccb_poll(twe, ccb, 2000); 160 twe_ccb_unmap(twe, ccb); 161 twe_ccb_free(twe, ccb); 162 splx(s); 163 } else { 164 ccb->ccb_tx.tx_handler = ld_twe_handler; 165 ccb->ccb_tx.tx_context = bp; 166 ccb->ccb_tx.tx_dv = (struct device *)sc; 167 twe_ccb_enqueue(twe, ccb); 168 rv = 0; 169 } 170 171 return (rv); 172 } 173 174 static int 175 ld_twe_start(struct ld_softc *ld, struct buf *bp) 176 { 177 178 return (ld_twe_dobio((struct ld_twe_softc *)ld, bp->b_data, 179 bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp)); 180 } 181 182 static void 183 ld_twe_handler(struct twe_ccb *ccb, int error) 184 { 185 struct buf *bp; 186 struct twe_context *tx; 187 struct ld_twe_softc *sc; 188 struct twe_softc *twe; 189 190 tx = &ccb->ccb_tx; 191 bp = tx->tx_context; 192 sc = (struct ld_twe_softc *)tx->tx_dv; 193 twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent; 194 195 twe_ccb_unmap(twe, ccb); 196 twe_ccb_free(twe, ccb); 197 198 if (error) { 199 bp->b_flags |= B_ERROR; 200 bp->b_error = error; 201 bp->b_resid = bp->b_bcount; 202 } else 203 bp->b_resid = 0; 204 205 lddone(&sc->sc_ld, bp); 206 } 207 208 static int 209 ld_twe_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 210 { 211 212 return (ld_twe_dobio((struct ld_twe_softc *)ld, data, 213 blkcnt * ld->sc_secsize, blkno, 1, NULL)); 214 } 215