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freebsd-skq/sys/dev/firewire/fwmem.c
Pedro F. Giffuni df57947f08 spdx: initial adoption of licensing ID tags. 
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Initially, only tag files that use BSD 4-Clause "Original" license.

RelNotes:	yes
Differential Revision:	https://reviews.freebsd.org/D13133
2017-11-18 14:26:50 +00:00

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/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* 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.
*
*/
#ifdef __FreeBSD__
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/conf.h>
#include <sys/sysctl.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/signal.h>
#include <sys/mman.h>
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#include <dev/firewire/firewire.h>
#include <dev/firewire/firewirereg.h>
#include <dev/firewire/fwmem.h>
static int fwmem_speed = 2, fwmem_debug = 0;
static struct fw_eui64 fwmem_eui64;
SYSCTL_DECL(_hw_firewire);
static SYSCTL_NODE(_hw_firewire, OID_AUTO, fwmem, CTLFLAG_RD, 0,
"FireWire Memory Access");
SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_hi, CTLFLAG_RW,
&fwmem_eui64.hi, 0, "Fwmem target EUI64 high");
SYSCTL_UINT(_hw_firewire_fwmem, OID_AUTO, eui64_lo, CTLFLAG_RW,
&fwmem_eui64.lo, 0, "Fwmem target EUI64 low");
SYSCTL_INT(_hw_firewire_fwmem, OID_AUTO, speed, CTLFLAG_RW, &fwmem_speed, 0,
"Fwmem link speed");
SYSCTL_INT(_debug, OID_AUTO, fwmem_debug, CTLFLAG_RW, &fwmem_debug, 0,
"Fwmem driver debug flag");
static MALLOC_DEFINE(M_FWMEM, "fwmem", "fwmem/FireWire");
#define MAXLEN (512 << fwmem_speed)
struct fwmem_softc {
struct fw_eui64 eui;
struct firewire_softc *sc;
int refcount;
};
static struct fw_xfer *
fwmem_xfer_req(
struct fw_device *fwdev,
caddr_t sc,
int spd,
int slen,
int rlen,
void *hand)
{
struct fw_xfer *xfer;
xfer = fw_xfer_alloc(M_FWMEM);
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 = min(spd, fwdev->speed);
xfer->hand = hand;
xfer->sc = sc;
xfer->send.pay_len = slen;
xfer->recv.pay_len = rlen;
return xfer;
}
struct fw_xfer *
fwmem_read_quad(
struct fw_device *fwdev,
caddr_t 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, 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)
printf("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,
caddr_t 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)
printf("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,
caddr_t 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)
printf("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,
caddr_t 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)
printf("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;
}
int
fwmem_open(struct cdev *dev, int flags, int fmt, fw_proc *td)
{
struct fwmem_softc *fms;
struct firewire_softc *sc;
int unit = DEV2UNIT(dev);
sc = devclass_get_softc(firewire_devclass, unit);
if (sc == NULL)
return (ENXIO);
FW_GLOCK(sc->fc);
if (dev->si_drv1 != NULL) {
if ((flags & FWRITE) != 0) {
FW_GUNLOCK(sc->fc);
return (EBUSY);
}
FW_GUNLOCK(sc->fc);
fms = dev->si_drv1;
fms->refcount++;
} else {
dev->si_drv1 = (void *)-1;
FW_GUNLOCK(sc->fc);
dev->si_drv1 = malloc(sizeof(struct fwmem_softc),
M_FWMEM, M_WAITOK);
dev->si_iosize_max = DFLTPHYS;
fms = dev->si_drv1;
bcopy(&fwmem_eui64, &fms->eui, sizeof(struct fw_eui64));
fms->sc = sc;
fms->refcount = 1;
}
if (fwmem_debug)
printf("%s: refcount=%d\n", __func__, fms->refcount);
return (0);
}
int
fwmem_close (struct cdev *dev, int flags, int fmt, fw_proc *td)
{
struct fwmem_softc *fms;
fms = dev->si_drv1;
FW_GLOCK(fms->sc->fc);
fms->refcount--;
FW_GUNLOCK(fms->sc->fc);
if (fwmem_debug)
printf("%s: refcount=%d\n", __func__, fms->refcount);
if (fms->refcount < 1) {
free(dev->si_drv1, M_FWMEM);
dev->si_drv1 = NULL;
}
return (0);
}
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_flags |= BIO_ERROR;
bp->bio_resid = bp->bio_bcount;
}
fw_xfer_free(xfer);
biodone(bp);
}
void
fwmem_strategy(struct bio *bp)
{
struct fwmem_softc *fms;
struct fw_device *fwdev;
struct fw_xfer *xfer;
struct cdev *dev;
int err = 0, iolen;
dev = bp->bio_dev;
/* XXX check request length */
fms = dev->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) {
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:
if (err != 0) {
if (fwmem_debug)
printf("%s: err=%d\n", __func__, err);
bp->bio_error = err;
bp->bio_flags |= BIO_ERROR;
bp->bio_resid = bp->bio_bcount;
biodone(bp);
}
}
int
fwmem_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, fw_proc *td)
{
struct fwmem_softc *fms;
int err = 0;
fms = dev->si_drv1;
switch (cmd) {
case FW_SDEUI64:
bcopy(data, &fms->eui, sizeof(struct fw_eui64));
break;
case FW_GDEUI64:
bcopy(&fms->eui, data, sizeof(struct fw_eui64));
break;
default:
err = EINVAL;
}
return (err);
}
int
fwmem_poll(struct cdev *dev, int events, fw_proc *td)
{
return EINVAL;
}
int
fwmem_mmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
int nproto, vm_memattr_t *memattr)
{
return EINVAL;
}
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