543 lines
13 KiB
C
543 lines
13 KiB
C
/* $NetBSD: ofdisk.c,v 1.53 2019/03/27 19:13:34 martin Exp $ */
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ofdisk.c,v 1.53 2019/03/27 19:13:34 martin Exp $");
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/device.h>
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#include <sys/conf.h>
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#include <sys/disklabel.h>
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#include <sys/disk.h>
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#include <sys/fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <dev/ofw/openfirm.h>
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struct ofdisk_softc {
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device_t sc_dev;
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int sc_phandle;
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int sc_unit;
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int sc_flags;
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struct disk sc_dk;
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int sc_ihandle;
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u_long max_transfer;
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};
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/* sc_flags */
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#define OFDF_ISFLOPPY 0x01 /* we are a floppy drive */
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#define OFDISK_FLOPPY_P(of) ((of)->sc_flags & OFDF_ISFLOPPY)
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static int ofdisk_match (device_t, cfdata_t, void *);
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static void ofdisk_attach (device_t, device_t, void *);
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CFATTACH_DECL_NEW(ofdisk, sizeof(struct ofdisk_softc),
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ofdisk_match, ofdisk_attach, NULL, NULL);
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extern struct cfdriver ofdisk_cd;
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dev_type_open(ofdisk_open);
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dev_type_close(ofdisk_close);
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dev_type_read(ofdisk_read);
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dev_type_write(ofdisk_write);
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dev_type_ioctl(ofdisk_ioctl);
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dev_type_strategy(ofdisk_strategy);
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dev_type_dump(ofdisk_dump);
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dev_type_size(ofdisk_size);
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const struct bdevsw ofdisk_bdevsw = {
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.d_open = ofdisk_open,
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.d_close = ofdisk_close,
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.d_strategy = ofdisk_strategy,
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.d_ioctl = ofdisk_ioctl,
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.d_dump = ofdisk_dump,
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.d_psize = ofdisk_size,
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.d_discard = nodiscard,
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.d_flag = D_DISK
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};
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const struct cdevsw ofdisk_cdevsw = {
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.d_open = ofdisk_open,
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.d_close = ofdisk_close,
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.d_read = ofdisk_read,
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.d_write = ofdisk_write,
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.d_ioctl = ofdisk_ioctl,
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.d_stop = nostop,
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.d_tty = notty,
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.d_poll = nopoll,
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.d_mmap = nommap,
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.d_kqfilter = nokqfilter,
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.d_discard = nodiscard,
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.d_flag = D_DISK
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};
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static void ofminphys(struct buf *);
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struct dkdriver ofdisk_dkdriver = {
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.d_strategy = ofdisk_strategy,
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.d_minphys = ofminphys
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};
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void ofdisk_getdefaultlabel (struct ofdisk_softc *, struct disklabel *);
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void ofdisk_getdisklabel (dev_t);
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static int
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ofdisk_match(device_t parent, cfdata_t match, void *aux)
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{
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struct ofbus_attach_args *oba = aux;
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char type[8];
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int l;
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if (strcmp(oba->oba_busname, "ofw"))
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return (0);
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if ((l = OF_getprop(oba->oba_phandle, "device_type", type,
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sizeof type - 1)) < 0)
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return 0;
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if (l >= sizeof type)
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return 0;
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type[l] = 0;
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return strcmp(type, "block") == 0 || strcmp(type, "scsi") == 0;
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}
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static void
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ofdisk_attach(device_t parent, device_t self, void *aux)
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{
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struct ofdisk_softc *of = device_private(self);
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struct ofbus_attach_args *oba = aux;
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char child[64];
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int l;
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of->sc_dev = self;
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if ((l = OF_getprop(oba->oba_phandle, "name", child,
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sizeof child - 1)) < 0)
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panic("device without name?");
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if (l >= sizeof child)
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l = sizeof child - 1;
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child[l] = 0;
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of->sc_flags = 0;
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of->sc_phandle = oba->oba_phandle;
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of->sc_unit = oba->oba_unit;
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of->sc_ihandle = 0;
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disk_init(&of->sc_dk, device_xname(of->sc_dev), &ofdisk_dkdriver);
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disk_attach(&of->sc_dk);
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printf("\n");
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if (strcmp(child, "floppy") == 0)
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of->sc_flags |= OFDF_ISFLOPPY;
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else {
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/* Discover wedges on this disk. */
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dkwedge_discover(&of->sc_dk);
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}
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}
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int
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ofdisk_open(dev_t dev, int flags, int fmt, struct lwp *lwp)
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{
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struct ofdisk_softc *of;
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char path[256];
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int error, l, part;
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of = device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
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if (of == NULL)
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return ENXIO;
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part = DISKPART(dev);
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mutex_enter(&of->sc_dk.dk_openlock);
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/*
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* If there are wedges, and this is not RAW_PART, then we
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* need to fail.
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*/
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if (of->sc_dk.dk_nwedges != 0 && part != RAW_PART) {
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error = EBUSY;
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goto bad1;
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}
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if (!of->sc_ihandle) {
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if ((l = OF_package_to_path(of->sc_phandle, path,
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sizeof path - 3)) < 0 ||
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l >= sizeof path - 3) {
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error = ENXIO;
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goto bad1;
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}
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path[l] = 0;
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/*
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* XXX This is for the benefit of SCSI/IDE disks that don't
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* XXX have all their childs in the device tree.
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* XXX YES, I DO THINK THIS IS A BUG IN OPENFIRMWARE!!!
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* XXX And yes, this is a very gross hack!
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* XXX See also ofscsi.c
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*/
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if (!strcmp(path + l - 4, "disk")) {
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path[l++] = '@';
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path[l++] = '0' + of->sc_unit;
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path[l] = 0;
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}
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strlcat(path, ":0", sizeof(path));
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if ((of->sc_ihandle = OF_open(path)) == -1) {
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error = ENXIO;
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goto bad1;
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}
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/*
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* Try to get characteristics of the disk.
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*/
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of->max_transfer = OF_call_method_1("max-transfer",
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of->sc_ihandle, 0);
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if (of->max_transfer > MAXPHYS)
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of->max_transfer = MAXPHYS;
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ofdisk_getdisklabel(dev);
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}
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switch (fmt) {
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case S_IFCHR:
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of->sc_dk.dk_copenmask |= 1 << part;
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break;
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case S_IFBLK:
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of->sc_dk.dk_bopenmask |= 1 << part;
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break;
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}
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of->sc_dk.dk_openmask =
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of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask;
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error = 0;
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bad1:
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mutex_exit(&of->sc_dk.dk_openlock);
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return (error);
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}
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int
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ofdisk_close(dev_t dev, int flags, int fmt, struct lwp *l)
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{
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struct ofdisk_softc *of =
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device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
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mutex_enter(&of->sc_dk.dk_openlock);
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switch (fmt) {
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case S_IFCHR:
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of->sc_dk.dk_copenmask &= ~(1 << DISKPART(dev));
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break;
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case S_IFBLK:
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of->sc_dk.dk_bopenmask &= ~(1 << DISKPART(dev));
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break;
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}
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of->sc_dk.dk_openmask = of->sc_dk.dk_copenmask | of->sc_dk.dk_bopenmask;
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#ifdef FIRMWORKSBUGS
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/*
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* This is a hack to get the firmware to flush its buffers.
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*/
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OF_seek(of->sc_ihandle, 0);
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#endif
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if (!of->sc_dk.dk_openmask) {
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OF_close(of->sc_ihandle);
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of->sc_ihandle = 0;
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}
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mutex_exit(&of->sc_dk.dk_openlock);
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return 0;
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}
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void
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ofdisk_strategy(struct buf *bp)
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{
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struct ofdisk_softc *of =
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device_lookup_private(&ofdisk_cd, DISKUNIT(bp->b_dev));
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struct partition *p;
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u_quad_t off;
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int read;
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int (*OF_io)(int, void *, int);
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daddr_t blkno = bp->b_blkno;
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bp->b_resid = 0;
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if (bp->b_bcount == 0)
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goto done;
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OF_io = bp->b_flags & B_READ ? OF_read :
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(int(*)(int, void*, int))OF_write;
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if (DISKPART(bp->b_dev) != RAW_PART) {
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if (bounds_check_with_label(&of->sc_dk, bp, 0) <= 0) {
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bp->b_resid = bp->b_bcount;
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goto done;
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}
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p = &of->sc_dk.dk_label->d_partitions[DISKPART(bp->b_dev)];
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blkno = bp->b_blkno + p->p_offset;
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}
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disk_busy(&of->sc_dk);
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off = (u_quad_t)blkno * DEV_BSIZE;
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read = -1;
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do {
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if (OF_seek(of->sc_ihandle, off) < 0)
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break;
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read = OF_io(of->sc_ihandle, bp->b_data, bp->b_bcount);
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} while (read == -2);
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if (read < 0) {
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bp->b_error = EIO;
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bp->b_resid = bp->b_bcount;
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} else
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bp->b_resid = bp->b_bcount - read;
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disk_unbusy(&of->sc_dk, bp->b_bcount - bp->b_resid,
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(bp->b_flags & B_READ));
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done:
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biodone(bp);
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}
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static void
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ofminphys(struct buf *bp)
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{
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struct ofdisk_softc *of =
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device_lookup_private(&ofdisk_cd, DISKUNIT(bp->b_dev));
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if (bp->b_bcount > of->max_transfer)
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bp->b_bcount = of->max_transfer;
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}
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int
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ofdisk_read(dev_t dev, struct uio *uio, int flags)
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{
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return physio(ofdisk_strategy, NULL, dev, B_READ, ofminphys, uio);
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}
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int
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ofdisk_write(dev_t dev, struct uio *uio, int flags)
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{
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return physio(ofdisk_strategy, NULL, dev, B_WRITE, ofminphys, uio);
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}
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int
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ofdisk_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
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{
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struct ofdisk_softc *of =
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device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
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int error;
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#ifdef __HAVE_OLD_DISKLABEL
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struct disklabel newlabel;
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#endif
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/* XXX: Why not allow wedges on floppy? */
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switch (cmd) {
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case DIOCDWEDGE:
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case DIOCAWEDGE:
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case DIOCLWEDGES:
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case DIOCRMWEDGES:
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case DIOCMWEDGES:
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if (OFDISK_FLOPPY_P(of))
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return ENOTTY;
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}
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error = disk_ioctl(&of->sc_dk, dev, cmd, data, flag, l);
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if (error != EPASSTHROUGH)
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return error;
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switch (cmd) {
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case DIOCWDINFO:
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case DIOCSDINFO:
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#ifdef __HAVE_OLD_DISKLABEL
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case ODIOCWDINFO:
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case ODIOCSDINFO:
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#endif
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{
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struct disklabel *lp;
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#ifdef __HAVE_OLD_DISKLABEL
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if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) {
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memset(&newlabel, 0, sizeof newlabel);
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memcpy(&newlabel, data, sizeof (struct olddisklabel));
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lp = &newlabel;
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} else
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#endif
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lp = (struct disklabel *)data;
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if ((flag & FWRITE) == 0)
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return EBADF;
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mutex_enter(&of->sc_dk.dk_openlock);
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error = setdisklabel(of->sc_dk.dk_label,
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lp, /*of->sc_dk.dk_openmask */0,
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of->sc_dk.dk_cpulabel);
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if (error == 0 && cmd == DIOCWDINFO
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#ifdef __HAVE_OLD_DISKLABEL
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|| xfer == ODIOCWDINFO
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#endif
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)
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error = writedisklabel(MAKEDISKDEV(major(dev),
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DISKUNIT(dev), RAW_PART), ofdisk_strategy,
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of->sc_dk.dk_label, of->sc_dk.dk_cpulabel);
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mutex_exit(&of->sc_dk.dk_openlock);
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return error;
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}
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case DIOCGDEFLABEL:
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ofdisk_getdefaultlabel(of, (struct disklabel *)data);
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return 0;
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#ifdef __HAVE_OLD_DISKLABEL
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case DIOCGDEFLABEL:
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ofdisk_getdefaultlabel(of, &newlabel);
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if (newlabel.d_npartitions > OLDMAXPARTITIONS)
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return ENOTTY;
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memcpy(data, &newlabel, sizeof (struct olddisklabel));
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return 0;
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#endif
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default:
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return ENOTTY;
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}
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}
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int
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ofdisk_dump(dev_t dev, daddr_t blkno, void *va, size_t size)
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{
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return EINVAL;
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}
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int
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ofdisk_size(dev_t dev)
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{
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struct ofdisk_softc *of;
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struct disklabel *lp;
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int size, part, omask;
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of = device_lookup_private(&ofdisk_cd, DISKUNIT(dev));
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if (of == NULL)
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return ENXIO;
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part = DISKPART(dev);
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omask = of->sc_dk.dk_openmask & (1 << part);
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lp = of->sc_dk.dk_label;
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if (omask == 0 && ofdisk_open(dev, 0, S_IFBLK, curlwp) != 0)
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return -1;
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if (lp->d_partitions[part].p_fstype != FS_SWAP)
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size = -1;
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else
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size = lp->d_partitions[part].p_size *
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(lp->d_secsize / DEV_BSIZE);
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if (omask == 0 && ofdisk_close(dev, 0, S_IFBLK, curlwp) != 0)
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return -1;
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return size;
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}
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void
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ofdisk_getdefaultlabel(struct ofdisk_softc *of, struct disklabel *lp)
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{
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memset(lp, 0, sizeof *lp);
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/*
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* XXX Firmware bug? Asking for block size gives a
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* XXX ridiculous number! So we use what the boot program
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* XXX uses.
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*/
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lp->d_secsize = DEV_BSIZE;
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lp->d_secperunit = OF_call_method_1("#blocks",
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of->sc_ihandle, 0);
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if (lp->d_secperunit == (u_int32_t)-1)
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lp->d_secperunit = 0x7fffffff;
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lp->d_secpercyl = 1;
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lp->d_nsectors = 1;
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lp->d_ntracks = 1;
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lp->d_ncylinders = lp->d_secperunit;
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lp->d_partitions[RAW_PART].p_offset = 0;
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lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
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lp->d_npartitions = RAW_PART + 1;
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lp->d_magic = DISKMAGIC;
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lp->d_magic2 = DISKMAGIC;
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lp->d_checksum = dkcksum(lp);
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}
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void
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ofdisk_getdisklabel(dev_t dev)
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{
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int unit = DISKUNIT(dev);
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struct ofdisk_softc *of =
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device_lookup_private(&ofdisk_cd, unit);
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struct disklabel *lp = of->sc_dk.dk_label;
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const char *errmes;
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int l;
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ofdisk_getdefaultlabel(of, lp);
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/*
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|
* Don't read the disklabel on a floppy; simply
|
|
* assign all partitions the same size/offset as
|
|
* RAW_PART. (This is essentially what the ISA
|
|
* floppy driver does, but we don't deal with
|
|
* density stuff.)
|
|
*/
|
|
if (OFDISK_FLOPPY_P(of)) {
|
|
lp->d_npartitions = MAXPARTITIONS;
|
|
for (l = 0; l < lp->d_npartitions; l++) {
|
|
if (l == RAW_PART)
|
|
continue;
|
|
/* struct copy */
|
|
lp->d_partitions[l] =
|
|
lp->d_partitions[RAW_PART];
|
|
}
|
|
lp->d_checksum = dkcksum(lp);
|
|
} else {
|
|
errmes = readdisklabel(MAKEDISKDEV(major(dev),
|
|
unit, RAW_PART), ofdisk_strategy, lp,
|
|
of->sc_dk.dk_cpulabel);
|
|
if (errmes != NULL)
|
|
printf("%s: %s\n", device_xname(of->sc_dev), errmes);
|
|
}
|
|
}
|