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NetBSD/sys/dev/ieee1394/fwmem.c

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/* $NetBSD: fwmem.c,v 1.19 2018/09/03 16:29:31 riastradh Exp $ */
/*-
* Copyright (c) 2002-2003
* Hidetoshi Shimokawa. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by Hidetoshi Shimokawa.
*
* 4. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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>
__KERNEL_RCSID(0, "$NetBSD: fwmem.c,v 1.19 2018/09/03 16:29:31 riastradh Exp $");
#include <sys/param.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/buf.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <dev/ieee1394/firewire.h>
#include <dev/ieee1394/firewirereg.h>
#include <dev/ieee1394/fwmem.h>
#include "ioconf.h"
static int fwmem_speed=2, fwmem_debug=0;
static struct fw_eui64 fwmem_eui64;
static int sysctl_fwmem_verify(SYSCTLFN_PROTO, int, int);
static int sysctl_fwmem_verify_speed(SYSCTLFN_PROTO);
static struct fw_xfer *fwmem_xfer_req(struct fw_device *, void *, int, int,
int, void *);
static void fwmem_biodone(struct fw_xfer *);
/*
* Setup sysctl(3) MIB, hw.fwmem.*
*
* TBD condition CTLFLAG_PERMANENT on being a module or not
*/
SYSCTL_SETUP(sysctl_fwmem, "sysctl fwmem subtree setup")
{
int rc, fwmem_node_num;
const struct sysctlnode *node;
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT, CTLTYPE_NODE, "fwmem",
SYSCTL_DESCR("IEEE1394 Memory Access"),
NULL, 0, NULL, 0, CTL_HW, CTL_CREATE, CTL_EOL)) != 0) {
goto err;
}
fwmem_node_num = node->sysctl_num;
/* fwmem target EUI64 high/low */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"eui64_hi", SYSCTL_DESCR("Fwmem target EUI64 high"),
NULL, 0, &fwmem_eui64.hi,
0, CTL_HW, fwmem_node_num, CTL_CREATE, CTL_EOL)) != 0) {
goto err;
}
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"eui64_lo", SYSCTL_DESCR("Fwmem target EUI64 low"),
NULL, 0, &fwmem_eui64.lo,
0, CTL_HW, fwmem_node_num, CTL_CREATE, CTL_EOL)) != 0) {
goto err;
}
/* fwmem link speed */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"speed", SYSCTL_DESCR("Fwmem link speed"),
sysctl_fwmem_verify_speed, 0, &fwmem_speed,
0, CTL_HW, fwmem_node_num, CTL_CREATE, CTL_EOL)) != 0) {
goto err;
}
/* fwmem driver debug flag */
if ((rc = sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT | CTLFLAG_READWRITE, CTLTYPE_INT,
"fwmem_debug", SYSCTL_DESCR("Fwmem driver debug flag"),
NULL, 0, &fwmem_debug,
0, CTL_HW, fwmem_node_num, CTL_CREATE, CTL_EOL)) != 0) {
goto err;
}
return;
err:
printf("%s: sysctl_createv failed (rc = %d)\n", __func__, rc);
}
static int
sysctl_fwmem_verify(SYSCTLFN_ARGS, int lower, int upper)
{
int error, t;
struct sysctlnode node;
node = *rnode;
t = *(int*)rnode->sysctl_data;
node.sysctl_data = &t;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL)
return error;
if (t < lower || t > upper)
return EINVAL;
*(int*)rnode->sysctl_data = t;
return 0;
}
static int
sysctl_fwmem_verify_speed(SYSCTLFN_ARGS)
{
return sysctl_fwmem_verify(SYSCTLFN_CALL(rnode), 0, FWSPD_S400);
}
#define MAXLEN (512 << fwmem_speed)
struct fwmem_softc {
struct fw_eui64 eui;
struct firewire_softc *sc;
int refcount;
STAILQ_HEAD(, fw_xfer) xferlist;
};
int
fwmem_open(dev_t dev, int flags, int fmt, struct lwp *td)
{
struct firewire_softc *sc;
struct fwmem_softc *fms;
struct fw_xfer *xfer;
sc = device_lookup_private(&ieee1394if_cd, DEV2UNIT(dev));
if (sc == NULL)
return ENXIO;
if (sc->si_drv1 != NULL) {
if ((flags & FWRITE) != 0) {
return EBUSY;
}
fms = (struct fwmem_softc *)sc->si_drv1;
fms->refcount++;
} else {
sc->si_drv1 = (void *)-1;
sc->si_drv1 = malloc(sizeof(struct fwmem_softc),
M_FW, M_WAITOK);
if (sc->si_drv1 == NULL)
return ENOMEM;
fms = (struct fwmem_softc *)sc->si_drv1;
memcpy(&fms->eui, &fwmem_eui64, sizeof(struct fw_eui64));
fms->sc = sc;
fms->refcount = 1;
STAILQ_INIT(&fms->xferlist);
xfer = fw_xfer_alloc(M_FW);
STAILQ_INSERT_TAIL(&fms->xferlist, xfer, link);
}
if (fwmem_debug)
printf("%s: refcount=%d\n", __func__, fms->refcount);
return 0;
}
int
fwmem_close(dev_t dev, int flags, int fmt, struct lwp *td)
{
struct firewire_softc *sc;
struct fwmem_softc *fms;
struct fw_xfer *xfer;
sc = device_lookup_private(&ieee1394if_cd, DEV2UNIT(dev));
if (sc == NULL)
return ENXIO;
fms = (struct fwmem_softc *)sc->si_drv1;
fms->refcount--;
if (fwmem_debug)
printf("%s: refcount=%d\n", __func__, fms->refcount);
if (fms->refcount < 1) {
while ((xfer = STAILQ_FIRST(&fms->xferlist)) != NULL) {
STAILQ_REMOVE_HEAD(&fms->xferlist, link);
fw_xfer_free(xfer);
}
free(sc->si_drv1, M_FW);
sc->si_drv1 = NULL;
}
return 0;
}
void
fwmem_strategy(struct bio *bp)
{
struct firewire_softc *sc;
struct fwmem_softc *fms;
struct fw_device *fwdev;
struct fw_xfer *xfer;
dev_t dev = bp->bio_dev;
int iolen, err = 0, s;
sc = device_lookup_private(&ieee1394if_cd, DEV2UNIT(dev));
if (sc == NULL)
return;
/* XXX check request length */
s = splvm();
fms = (struct fwmem_softc *)sc->si_drv1;
fwdev = fw_noderesolve_eui64(fms->sc->fc, &fms->eui);
if (fwdev == NULL) {
if (fwmem_debug)
printf("fwmem: no such device ID:%08x%08x\n",
fms->eui.hi, fms->eui.lo);
err = EINVAL;
goto error;
}
iolen = MIN(bp->bio_bcount, MAXLEN);
if ((bp->bio_cmd & BIO_READ) == BIO_READ) {
if (iolen == 4 && (bp->bio_offset & 3) == 0)
xfer = fwmem_read_quad(fwdev, (void *) bp, fwmem_speed,
bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
bp->bio_data, fwmem_biodone);
else
xfer = fwmem_read_block(fwdev, (void *) bp, fwmem_speed,
bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
iolen, bp->bio_data, fwmem_biodone);
} else {
if (iolen == 4 && (bp->bio_offset & 3) == 0)
xfer = fwmem_write_quad(fwdev, (void *)bp, fwmem_speed,
bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
bp->bio_data, fwmem_biodone);
else
xfer = fwmem_write_block(fwdev, (void *)bp, fwmem_speed,
bp->bio_offset >> 32, bp->bio_offset & 0xffffffff,
iolen, bp->bio_data, fwmem_biodone);
}
if (xfer == NULL) {
err = EIO;
goto error;
}
/* XXX */
bp->bio_resid = bp->bio_bcount - iolen;
error:
splx(s);
if (err != 0) {
if (fwmem_debug)
printf("%s: err=%d\n", __func__, err);
bp->bio_error = err;
bp->bio_resid = bp->bio_bcount;
biodone(bp);
}
}
int
fwmem_ioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *td)
{
struct firewire_softc *sc;
struct fwmem_softc *fms;
int err = 0;
sc = device_lookup_private(&ieee1394if_cd, DEV2UNIT(dev));
if (sc == NULL)
return ENXIO;
fms = (struct fwmem_softc *)sc->si_drv1;
switch (cmd) {
case FW_SDEUI64:
memcpy(&fms->eui, data, sizeof(struct fw_eui64));
break;
case FW_GDEUI64:
memcpy(data, &fms->eui, sizeof(struct fw_eui64));
break;
default:
err = EINVAL;
}
return err;
}
struct fw_xfer *
fwmem_read_quad(struct fw_device *fwdev, void * sc, uint8_t spd,
uint16_t dst_hi, uint32_t dst_lo, void *data,
void (*hand)(struct fw_xfer *))
{
struct fw_xfer *xfer;
struct fw_pkt *fp;
xfer = fwmem_xfer_req(fwdev, (void *)sc, spd, 0, 4, hand);
if (xfer == NULL)
return NULL;
fp = &xfer->send.hdr;
fp->mode.rreqq.tcode = FWTCODE_RREQQ;
fp->mode.rreqq.dest_hi = dst_hi;
fp->mode.rreqq.dest_lo = dst_lo;
xfer->send.payload = NULL;
xfer->recv.payload = (uint32_t *)data;
if (fwmem_debug)
aprint_error("fwmem_read_quad: %d %04x:%08x\n",
fwdev->dst, dst_hi, dst_lo);
if (fw_asyreq(xfer->fc, -1, xfer) == 0)
return xfer;
fw_xfer_free(xfer);
return NULL;
}
struct fw_xfer *
fwmem_write_quad(struct fw_device *fwdev, void *sc, uint8_t spd,
uint16_t dst_hi, uint32_t dst_lo, void *data,
void (*hand)(struct fw_xfer *))
{
struct fw_xfer *xfer;
struct fw_pkt *fp;
xfer = fwmem_xfer_req(fwdev, sc, spd, 0, 0, hand);
if (xfer == NULL)
return NULL;
fp = &xfer->send.hdr;
fp->mode.wreqq.tcode = FWTCODE_WREQQ;
fp->mode.wreqq.dest_hi = dst_hi;
fp->mode.wreqq.dest_lo = dst_lo;
fp->mode.wreqq.data = *(uint32_t *)data;
xfer->send.payload = xfer->recv.payload = NULL;
if (fwmem_debug)
aprint_error("fwmem_write_quad: %d %04x:%08x %08x\n",
fwdev->dst, dst_hi, dst_lo, *(uint32_t *)data);
if (fw_asyreq(xfer->fc, -1, xfer) == 0)
return xfer;
fw_xfer_free(xfer);
return NULL;
}
struct fw_xfer *
fwmem_read_block(struct fw_device *fwdev, void *sc, uint8_t spd,
uint16_t dst_hi, uint32_t dst_lo, int len, void *data,
void (*hand)(struct fw_xfer *))
{
struct fw_xfer *xfer;
struct fw_pkt *fp;
xfer = fwmem_xfer_req(fwdev, sc, spd, 0, roundup2(len, 4), hand);
if (xfer == NULL)
return NULL;
fp = &xfer->send.hdr;
fp->mode.rreqb.tcode = FWTCODE_RREQB;
fp->mode.rreqb.dest_hi = dst_hi;
fp->mode.rreqb.dest_lo = dst_lo;
fp->mode.rreqb.len = len;
fp->mode.rreqb.extcode = 0;
xfer->send.payload = NULL;
xfer->recv.payload = data;
if (fwmem_debug)
aprint_error("fwmem_read_block: %d %04x:%08x %d\n",
fwdev->dst, dst_hi, dst_lo, len);
if (fw_asyreq(xfer->fc, -1, xfer) == 0)
return xfer;
fw_xfer_free(xfer);
return NULL;
}
struct fw_xfer *
fwmem_write_block(struct fw_device *fwdev, void *sc, uint8_t spd,
uint16_t dst_hi, uint32_t dst_lo, int len, void *data,
void (*hand)(struct fw_xfer *))
{
struct fw_xfer *xfer;
struct fw_pkt *fp;
xfer = fwmem_xfer_req(fwdev, sc, spd, len, 0, hand);
if (xfer == NULL)
return NULL;
fp = &xfer->send.hdr;
fp->mode.wreqb.tcode = FWTCODE_WREQB;
fp->mode.wreqb.dest_hi = dst_hi;
fp->mode.wreqb.dest_lo = dst_lo;
fp->mode.wreqb.len = len;
fp->mode.wreqb.extcode = 0;
xfer->send.payload = data;
xfer->recv.payload = NULL;
if (fwmem_debug)
aprint_error("fwmem_write_block: %d %04x:%08x %d\n",
fwdev->dst, dst_hi, dst_lo, len);
if (fw_asyreq(xfer->fc, -1, xfer) == 0)
return xfer;
fw_xfer_free(xfer);
return NULL;
}
static struct fw_xfer *
fwmem_xfer_req(struct fw_device *fwdev, void *sc, int spd, int slen, int rlen,
void *hand)
{
struct fw_xfer *xfer;
xfer = fw_xfer_alloc(M_FW);
if (xfer == NULL)
return NULL;
xfer->fc = fwdev->fc;
xfer->send.hdr.mode.hdr.dst = FWLOCALBUS | fwdev->dst;
if (spd < 0)
xfer->send.spd = fwdev->speed;
else
xfer->send.spd = uimin(spd, fwdev->speed);
xfer->hand = hand;
xfer->sc = sc;
xfer->send.pay_len = slen;
xfer->recv.pay_len = rlen;
return xfer;
}
static void
fwmem_biodone(struct fw_xfer *xfer)
{
struct bio *bp;
bp = (struct bio *)xfer->sc;
bp->bio_error = xfer->resp;
if (bp->bio_error != 0) {
if (fwmem_debug)
printf("%s: err=%d\n", __func__, bp->bio_error);
bp->bio_resid = bp->bio_bcount;
}
fw_xfer_free(xfer);
biodone(bp);
}
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