1 /* $NetBSD: ld_twe.c,v 1.10 2002/05/24 18:10:06 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2000, 2001, 2002 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 1.10 2002/05/24 18:10:06 christos 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 <uvm/uvm_extern.h> 63 64 #include <dev/ldvar.h> 65 66 #include <dev/pci/twereg.h> 67 #include <dev/pci/twevar.h> 68 69 struct ld_twe_softc { 70 struct ld_softc sc_ld; 71 int sc_hwunit; 72 }; 73 74 static void ld_twe_attach(struct device *, struct device *, void *); 75 static int ld_twe_dobio(struct ld_twe_softc *, void *, int, int, int, 76 struct buf *); 77 static int ld_twe_dump(struct ld_softc *, void *, int, int); 78 static void ld_twe_handler(struct twe_ccb *, int); 79 static int ld_twe_match(struct device *, struct cfdata *, void *); 80 static int ld_twe_start(struct ld_softc *, struct buf *); 81 82 struct cfattach ld_twe_ca = { 83 sizeof(struct ld_twe_softc), ld_twe_match, ld_twe_attach 84 }; 85 86 static int 87 ld_twe_match(struct device *parent, struct cfdata *match, void *aux) 88 { 89 90 return (1); 91 } 92 93 static void 94 ld_twe_attach(struct device *parent, struct device *self, void *aux) 95 { 96 struct twe_attach_args *twea; 97 struct ld_twe_softc *sc; 98 struct ld_softc *ld; 99 struct twe_softc *twe; 100 101 sc = (struct ld_twe_softc *)self; 102 ld = &sc->sc_ld; 103 twe = (struct twe_softc *)parent; 104 twea = aux; 105 106 sc->sc_hwunit = twea->twea_unit; 107 ld->sc_flags = LDF_ENABLED; 108 ld->sc_maxxfer = twe_get_maxxfer(twe_get_maxsegs()); 109 ld->sc_secperunit = twe->sc_dsize[twea->twea_unit]; 110 ld->sc_secsize = TWE_SECTOR_SIZE; 111 ld->sc_maxqueuecnt = (TWE_MAX_QUEUECNT - 1) / twe->sc_nunits; 112 ld->sc_start = ld_twe_start; 113 ld->sc_dump = ld_twe_dump; 114 115 printf("\n"); 116 ldattach(ld); 117 } 118 119 static int 120 ld_twe_dobio(struct ld_twe_softc *sc, void *data, int datasize, int blkno, 121 int dowrite, struct buf *bp) 122 { 123 struct twe_ccb *ccb; 124 struct twe_cmd *tc; 125 struct twe_softc *twe; 126 int s, rv, flags; 127 128 twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent; 129 130 flags = (dowrite ? TWE_CCB_DATA_OUT : TWE_CCB_DATA_IN); 131 if ((rv = twe_ccb_alloc(twe, &ccb, flags)) != 0) 132 return (rv); 133 134 ccb->ccb_data = data; 135 ccb->ccb_datasize = datasize; 136 tc = ccb->ccb_cmd; 137 138 /* Build the command. */ 139 tc->tc_size = 3; 140 tc->tc_unit = sc->sc_hwunit; 141 tc->tc_count = htole16(datasize / TWE_SECTOR_SIZE); 142 tc->tc_args.io.lba = htole32(blkno); 143 144 if (dowrite) 145 tc->tc_opcode = TWE_OP_WRITE | (tc->tc_size << 5); 146 else 147 tc->tc_opcode = TWE_OP_READ | (tc->tc_size << 5); 148 149 /* Map the data transfer. */ 150 if ((rv = twe_ccb_map(twe, ccb)) != 0) { 151 twe_ccb_free(twe, ccb); 152 return (rv); 153 } 154 155 if (bp == NULL) { 156 /* 157 * Polled commands must not sit on the software queue. Wait 158 * up to 2 seconds for the command to complete. 159 */ 160 s = splbio(); 161 rv = twe_ccb_poll(twe, ccb, 2000); 162 twe_ccb_unmap(twe, ccb); 163 twe_ccb_free(twe, ccb); 164 splx(s); 165 } else { 166 ccb->ccb_tx.tx_handler = ld_twe_handler; 167 ccb->ccb_tx.tx_context = bp; 168 ccb->ccb_tx.tx_dv = (struct device *)sc; 169 twe_ccb_enqueue(twe, ccb); 170 rv = 0; 171 } 172 173 return (rv); 174 } 175 176 static int 177 ld_twe_start(struct ld_softc *ld, struct buf *bp) 178 { 179 180 return (ld_twe_dobio((struct ld_twe_softc *)ld, bp->b_data, 181 bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp)); 182 } 183 184 static void 185 ld_twe_handler(struct twe_ccb *ccb, int error) 186 { 187 struct buf *bp; 188 struct twe_context *tx; 189 struct ld_twe_softc *sc; 190 struct twe_softc *twe; 191 192 tx = &ccb->ccb_tx; 193 bp = tx->tx_context; 194 sc = (struct ld_twe_softc *)tx->tx_dv; 195 twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent; 196 197 twe_ccb_unmap(twe, ccb); 198 twe_ccb_free(twe, ccb); 199 200 if (error) { 201 bp->b_flags |= B_ERROR; 202 bp->b_error = error; 203 bp->b_resid = bp->b_bcount; 204 } else 205 bp->b_resid = 0; 206 207 lddone(&sc->sc_ld, bp); 208 } 209 210 static int 211 ld_twe_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 212 { 213 214 return (ld_twe_dobio((struct ld_twe_softc *)ld, data, 215 blkcnt * ld->sc_secsize, blkno, 1, NULL)); 216 } 217