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/*
* Copyright (C) 2002 Benno Rice <benno@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bio.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/linker.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <geom/geom.h>
#include <dev/ofw/openfirm.h>
#define OFWD_BLOCKSIZE 512
struct ofwd_softc
{
struct bio_queue_head ofwd_bio_queue;
struct mtx ofwd_queue_mtx;
ihandle_t ofwd_instance;
off_t ofwd_mediasize;
unsigned ofwd_sectorsize;
unsigned ofwd_fwheads;
unsigned ofwd_fwsectors;
struct proc *ofwd_procp;
struct g_geom *ofwd_gp;
struct g_provider *ofwd_pp;
} ofwd_softc;
static g_init_t g_ofwd_init;
static g_start_t g_ofwd_start;
static g_access_t g_ofwd_access;
struct g_class g_ofwd_class = {
.name = "OFWD",
.version = G_VERSION,
.init = g_ofwd_init,
.start = g_ofwd_start,
.access = g_ofwd_access,
};
DECLARE_GEOM_CLASS(g_ofwd_class, g_ofwd);
static int ofwd_enable = 0;
TUNABLE_INT("kern.ofw.disk", &ofwd_enable);
static int
ofwd_startio(struct ofwd_softc *sc, struct bio *bp)
{
u_int r;
r = OF_seek(sc->ofwd_instance, bp->bio_offset);
switch (bp->bio_cmd) {
case BIO_READ:
r = OF_read(sc->ofwd_instance, (void *)bp->bio_data,
bp->bio_length);
break;
case BIO_WRITE:
r = OF_write(sc->ofwd_instance, (void *)bp->bio_data,
bp->bio_length);
break;
}
if (r != bp->bio_length)
panic("ofwd: incorrect i/o count");
bp->bio_resid = 0;
return (0);
}
static void
ofwd_kthread(void *arg)
{
struct ofwd_softc *sc;
struct bio *bp;
int error;
sc = arg;
curthread->td_base_pri = PRIBIO;
for (;;) {
mtx_lock(&sc->ofwd_queue_mtx);
bp = bioq_takefirst(&sc->ofwd_bio_queue);
if (!bp) {
msleep(sc, &sc->ofwd_queue_mtx, PRIBIO | PDROP,
"ofwdwait", 0);
continue;
}
mtx_unlock(&sc->ofwd_queue_mtx);
if (bp->bio_cmd == BIO_GETATTR) {
error = EOPNOTSUPP;
} else
error = ofwd_startio(sc, bp);
if (error != -1) {
bp->bio_completed = bp->bio_length;
g_io_deliver(bp, error);
}
}
}
static void
g_ofwd_init(struct g_class *mp __unused)
{
struct ofwd_softc *sc;
struct g_geom *gp;
struct g_provider *pp;
char path[128];
char fname[32];
phandle_t ofd;
ihandle_t ifd;
int error;
if (ofwd_enable == 0)
return;
ofd = OF_finddevice("ofwdisk");
if (ofd == -1)
return;
bzero(path, 128);
OF_package_to_path(ofd, path, 128);
OF_getprop(ofd, "file", fname, sizeof(fname));
printf("ofw_disk located at %s, file %s\n", path, fname);
ifd = OF_open(path);
if (ifd == -1) {
printf("ofw_disk: could not create instance\n");
return;
}
sc = (struct ofwd_softc *)malloc(sizeof *sc, M_DEVBUF,
M_WAITOK|M_ZERO);
bioq_init(&sc->ofwd_bio_queue);
mtx_init(&sc->ofwd_queue_mtx, "ofwd bio queue", NULL, MTX_DEF);
sc->ofwd_instance = ifd;
sc->ofwd_mediasize = (off_t)2*33554432 * OFWD_BLOCKSIZE;
sc->ofwd_sectorsize = OFWD_BLOCKSIZE;
sc->ofwd_fwsectors = 0;
sc->ofwd_fwheads = 0;
error = kthread_create(ofwd_kthread, sc, &sc->ofwd_procp, 0, 0,
"ofwd0");
if (error != 0) {
free(sc, M_DEVBUF);
return;
}
gp = g_new_geomf(&g_ofwd_class, "ofwd0");
gp->softc = sc;
pp = g_new_providerf(gp, "ofwd0");
pp->mediasize = sc->ofwd_mediasize;
pp->sectorsize = sc->ofwd_sectorsize;
sc->ofwd_gp = gp;
sc->ofwd_pp = pp;
g_error_provider(pp, 0);
}
static void
g_ofwd_start(struct bio *bp)
{
struct ofwd_softc *sc;
sc = bp->bio_to->geom->softc;
mtx_lock(&sc->ofwd_queue_mtx);
bioq_disksort(&sc->ofwd_bio_queue, bp);
mtx_unlock(&sc->ofwd_queue_mtx);
wakeup(sc);
}
static int
g_ofwd_access(struct g_provider *pp, int r, int w, int e)
{
if (pp->geom->softc == NULL)
return (ENXIO);
return (0);
}
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