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ld_twe.c revision 1.1
      1 /*	$NetBSD: ld_twe.c,v 1.1 2000/11/26 17:44:06 ad 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 "rnd.h"
     44 #include "opt_twe.h"
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/kernel.h>
     49 #include <sys/device.h>
     50 #include <sys/buf.h>
     51 #include <sys/endian.h>
     52 #include <sys/dkio.h>
     53 #include <sys/disk.h>
     54 #if NRND > 0
     55 #include <sys/rnd.h>
     56 #endif
     57 
     58 #include <machine/bus.h>
     59 
     60 #include <uvm/uvm_extern.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 *, int, void *, int, int,
     74 			      int, struct twe_context *);
     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 =
    110 	    min((twe->sc_nccbs - 1) / twe->sc_nunits, TWE_MAX_PU_QUEUECNT);
    111 	ld->sc_start = ld_twe_start;
    112 	ld->sc_dump = ld_twe_dump;
    113 
    114 	/* Build synthetic geometry as per controller internal rules. */
    115 	if (ld->sc_secperunit > 0x200000) {
    116 		ld->sc_nheads = 255;
    117 		ld->sc_nsectors = 63;
    118 	} else {
    119 		ld->sc_nheads = 64;
    120 		ld->sc_nsectors = 32;
    121 	}
    122 	ld->sc_ncylinders = ld->sc_secperunit /
    123 	    (ld->sc_nheads * ld->sc_nsectors);
    124 
    125 	printf("\n");
    126 	ldattach(ld);
    127 }
    128 
    129 static int
    130 ld_twe_dobio(struct ld_twe_softc *sc, int unit, void *data, int datasize,
    131 	      int blkno, int dowrite, struct twe_context *tx)
    132 {
    133 	struct twe_ccb *ccb;
    134 	struct twe_cmd *tc;
    135 	struct twe_softc *twe;
    136 	int s, rv, flags;
    137 
    138 	twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent;
    139 
    140 	flags = (dowrite ? TWE_CCB_DATA_OUT : TWE_CCB_DATA_IN);
    141 	if ((rv = twe_ccb_alloc(twe, &ccb, flags)) != 0)
    142 		return (rv);
    143 
    144 	ccb->ccb_data = data;
    145 	ccb->ccb_datasize = datasize;
    146 	tc = ccb->ccb_cmd;
    147 
    148 	/* Build the command. */
    149 	tc->tc_size = 3;
    150 	tc->tc_unit = unit;
    151 	tc->tc_count = htole16(datasize / TWE_SECTOR_SIZE);
    152 	tc->tc_args.io.lba = htole32(blkno);
    153 
    154 	if (dowrite)
    155 		tc->tc_opcode = TWE_OP_WRITE | (tc->tc_size << 5);
    156 	else
    157 		tc->tc_opcode = TWE_OP_READ | (tc->tc_size << 5);
    158 
    159 	/* Map the data transfer. */
    160 	if ((rv = twe_ccb_map(twe, ccb)) != 0) {
    161 		twe_ccb_free(twe, ccb);
    162 		return (rv);
    163 	}
    164 
    165 	if (tx == NULL) {
    166 		/*
    167 		 * Polled commands must not sit on the software queue.  Wait
    168 		 * up to 2 seconds for the command to complete.
    169 		 */
    170 		s = splbio();
    171 		if ((rv = twe_ccb_submit(twe, ccb)) == 0)
    172 			rv = twe_ccb_poll(twe, ccb, 2000);
    173 		twe_ccb_unmap(twe, ccb);
    174 		twe_ccb_free(twe, ccb);
    175 		splx(s);
    176 	} else {
    177 		memcpy(&ccb->ccb_tx, tx, sizeof(struct twe_context));
    178 		twe_ccb_enqueue(twe, ccb);
    179 		rv = 0;
    180 	}
    181 
    182 	return (rv);
    183 }
    184 
    185 static int
    186 ld_twe_start(struct ld_softc *ld, struct buf *bp)
    187 {
    188 	struct twe_context tx;
    189 	struct ld_twe_softc *sc;
    190 	struct twe_softc *twe;
    191 
    192 	sc = (struct ld_twe_softc *)ld;
    193 	twe = (struct twe_softc *)ld->sc_dv.dv_parent;
    194 
    195 	tx.tx_handler = ld_twe_handler;
    196 	tx.tx_context = bp;
    197 	tx.tx_dv = &ld->sc_dv;
    198 
    199 	return (ld_twe_dobio(sc, sc->sc_hwunit, bp->b_data, bp->b_bcount,
    200 	    bp->b_rawblkno, (bp->b_flags & B_READ) == 0, &tx));
    201 }
    202 
    203 static void
    204 ld_twe_handler(struct twe_ccb *ccb, int error)
    205 {
    206 	struct buf *bp;
    207 	struct twe_context *tx;
    208 	struct ld_twe_softc *sc;
    209 	struct twe_softc *twe;
    210 
    211 	tx = &ccb->ccb_tx;
    212 	bp = tx->tx_context;
    213 	sc = (struct ld_twe_softc *)tx->tx_dv;
    214 	twe = (struct twe_softc *)sc->sc_ld.sc_dv.dv_parent;
    215 
    216 	twe_ccb_unmap(twe, ccb);
    217 	twe_ccb_free(twe, ccb);
    218 
    219 	if (error) {
    220 		bp->b_flags |= B_ERROR;
    221 		bp->b_error = error;
    222 		bp->b_resid = bp->b_bcount;
    223 	} else
    224 		bp->b_resid = 0;
    225 
    226 	lddone(&sc->sc_ld, bp);
    227 }
    228 
    229 static int
    230 ld_twe_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
    231 {
    232 	struct ld_twe_softc *sc;
    233 
    234 	sc = (struct ld_twe_softc *)ld;
    235 
    236 	return (ld_twe_dobio(sc, sc->sc_hwunit, data, blkcnt * ld->sc_secsize,
    237 	    blkno, 1, NULL));
    238 }
    239