sys/dev/pci/ld_amr.c

   1 /*      $NetBSD: ld_amr.c,v 1.18 2009/05/06 10:34:32 cegger Exp $       */
   2
   3 /*-
   4  * Copyright (c) 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.
   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  * AMI RAID controller front-end for ld(4) driver.
  34  */
  35
  36 #include <sys/cdefs.h>
  37 __KERNEL_RCSID(0, "$NetBSD: ld_amr.c,v 1.18 2009/05/06 10:34:32 cegger Exp $");
  38
  39 #include "rnd.h"
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/device.h>
  45 #include <sys/buf.h>
  46 #include <sys/bufq.h>
  47 #include <sys/endian.h>
  48 #include <sys/dkio.h>
  49 #include <sys/disk.h>
  50 #if NRND > 0
  51 #include <sys/rnd.h>
  52 #endif
  53
  54 #include <uvm/uvm_extern.h>
  55
  56 #include <sys/bus.h>
  57
  58 #include <dev/ldvar.h>
  59
  60 #include <dev/pci/pcireg.h>
  61 #include <dev/pci/pcivar.h>
  62 #include <dev/pci/amrreg.h>
  63 #include <dev/pci/amrvar.h>
  64
  65 struct ld_amr_softc {
  66         struct  ld_softc sc_ld;
  67         int     sc_hwunit;
  68 };
  69
  70 static int      ld_amr_dobio(struct ld_amr_softc *, void *, int, int, int,
  71                              struct buf *);
  72 static int      ld_amr_dump(struct ld_softc *, void *, int, int);
  73 static void     ld_amr_handler(struct amr_ccb *);
  74 static int      ld_amr_start(struct ld_softc *, struct buf *);
  75
  76 static int
  77 ld_amr_match(device_t parent, cfdata_t match, void *aux)
  78 {
  79
  80         return (1);
  81 }
  82
  83 static void
  84 ld_amr_attach(device_t parent, device_t self, void *aux)
  85 {
  86         struct amr_attach_args *amra = aux;
  87         struct ld_amr_softc *sc = device_private(self);
  88         struct ld_softc *ld = &sc->sc_ld;
  89         struct amr_softc *amr = device_private(parent);
  90         const char *statestr;
  91         int happy;
  92
  93         ld->sc_dv = self;
  94
  95         sc->sc_hwunit = amra->amra_unit;
  96         ld->sc_maxxfer = amr_max_xfer;
  97         ld->sc_maxqueuecnt = (amr->amr_maxqueuecnt - AMR_NCCB_RESV)
  98             / amr->amr_numdrives;
  99         ld->sc_secperunit = amr->amr_drive[sc->sc_hwunit].al_size;
 100         ld->sc_secsize = AMR_SECTOR_SIZE;
 101         ld->sc_start = ld_amr_start;
 102         ld->sc_dump = ld_amr_dump;
 103
 104         if (ld->sc_maxqueuecnt > AMR_MAX_CMDS_PU)
 105                 ld->sc_maxqueuecnt = AMR_MAX_CMDS_PU;
 106
 107         /*
 108          * Print status information and attach to the ld driver proper.
 109          */
 110         statestr = amr_drive_state(amr->amr_drive[sc->sc_hwunit].al_state,
 111             &happy);
 112         if (happy)
 113                 ld->sc_flags = LDF_ENABLED;
 114         aprint_normal(": RAID %d, %s\n",
 115             amr->amr_drive[sc->sc_hwunit].al_properties & AMR_DRV_RAID_MASK,
 116             statestr);
 117
 118         ldattach(ld);
 119 }
 120
 121 CFATTACH_DECL_NEW(ld_amr, sizeof(struct ld_amr_softc),
 122     ld_amr_match, ld_amr_attach, NULL, NULL);
 123
 124 static int
 125 ld_amr_dobio(struct ld_amr_softc *sc, void *data, int datasize,
 126              int blkno, int dowrite, struct buf *bp)
 127 {
 128         struct amr_ccb *ac;
 129         struct amr_softc *amr;
 130         struct amr_mailbox_cmd *mb;
 131         int s, rv;
 132
 133         amr = device_private(device_parent(sc->sc_ld.sc_dv));
 134
 135         if ((rv = amr_ccb_alloc(amr, &ac)) != 0)
 136                 return (rv);
 137
 138         mb = &ac->ac_cmd;
 139         mb->mb_command = (dowrite ? AMR_CMD_LWRITE : AMR_CMD_LREAD);
 140         mb->mb_drive = sc->sc_hwunit;
 141         mb->mb_blkcount = htole16(datasize / AMR_SECTOR_SIZE);
 142         mb->mb_lba = htole32(blkno);
 143
 144         rv = amr_ccb_map(amr, ac, data, datasize,
 145             (dowrite ? AC_XFER_OUT : AC_XFER_IN));
 146         if (rv != 0) {
 147                 amr_ccb_free(amr, ac);
 148                 return (rv);
 149         }
 150
 151         if (bp == NULL) {
 152                 /*
 153                  * Polled commands must not sit on the software queue.  Wait
 154                  * up to 30 seconds for the command to complete.
 155                  */
 156                 s = splbio();
 157                 rv = amr_ccb_poll(amr, ac, 30000);
 158                 splx(s);
 159                 amr_ccb_unmap(amr, ac);
 160                 amr_ccb_free(amr, ac);
 161         } else {
 162                 ac->ac_handler = ld_amr_handler;
 163                 ac->ac_context = bp;
 164                 ac->ac_dv = sc->sc_ld.sc_dv;
 165                 amr_ccb_enqueue(amr, ac);
 166                 rv = 0;
 167         }
 168
 169         return (rv);
 170 }
 171
 172 static int
 173 ld_amr_start(struct ld_softc *ld, struct buf *bp)
 174 {
 175
 176         return (ld_amr_dobio((struct ld_amr_softc *)ld, bp->b_data,
 177             bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
 178 }
 179
 180 static void
 181 ld_amr_handler(struct amr_ccb *ac)
 182 {
 183         struct buf *bp;
 184         struct ld_amr_softc *sc;
 185         struct amr_softc *amr;
 186
 187         bp = ac->ac_context;
 188         sc = device_private(ac->ac_dv);
 189         amr = device_private(device_parent(sc->sc_ld.sc_dv));
 190
 191         if (ac->ac_status != AMR_STATUS_SUCCESS) {
 192                 printf("%s: cmd status 0x%02x\n", device_xname(sc->sc_ld.sc_dv),
 193                     ac->ac_status);
 194
 195                 bp->b_error = EIO;
 196                 bp->b_resid = bp->b_bcount;
 197         } else
 198                 bp->b_resid = 0;
 199
 200         amr_ccb_unmap(amr, ac);
 201         amr_ccb_free(amr, ac);
 202         lddone(&sc->sc_ld, bp);
 203 }
 204
 205 static int
 206 ld_amr_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
 207 {
 208         struct ld_amr_softc *sc;
 209
 210         sc = (struct ld_amr_softc *)ld;
 211
 212         return (ld_amr_dobio(sc, data, blkcnt * ld->sc_secsize, blkno, 1,
 213             NULL));
 214 }