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freebsd-skq/sys/dev/firewire/fwmem.c
simokawa 6052bc5731 MFp4: MPSAFE firewire stack. 
- lock its own locks and drop Giant.
- create its own taskqueue thread.
- split interrupt routine
- use interrupt filter as a fast interrupt.
- run watchdog timer in taskqueue so that it should be
   serialized with the bottom half.
- add extra sanity check for transaction labels.
   disable ad-hoc workaround for unknown tlabels.
- add sleep/wakeup synchronization primitives
- don't reset OHCI in fwohci_stop()
2007-06-06 14:31:36 +00:00

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/*-
* 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>
#if defined(__DragonFly__) || __FreeBSD_version < 500000
#include <sys/buf.h>
#else
#include <sys/bio.h>
#endif
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/signal.h>
#include <sys/mman.h>
#include <sys/ioccom.h>
#include <sys/fcntl.h>
#ifdef __DragonFly__
#include "firewire.h"
#include "firewirereg.h"
#include "fwmem.h"
#else
#include <dev/firewire/firewire.h>
#include <dev/firewire/firewirereg.h>
#include <dev/firewire/fwmem.h>
#endif
static int fwmem_speed=2, fwmem_debug=0;
static struct fw_eui64 fwmem_eui64;
SYSCTL_DECL(_hw_firewire);
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");
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, (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)
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 = (struct fwmem_softc *)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);
if (dev->si_drv1 == NULL)
return(ENOMEM);
dev->si_iosize_max = DFLTPHYS;
fms = (struct fwmem_softc *)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 = (struct fwmem_softc *)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, s, iolen;
dev = bp->bio_dev;
/* XXX check request length */
s = splfw();
fms = (struct fwmem_softc *)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) == 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_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 = (struct fwmem_softc *)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
#if defined(__DragonFly__) || __FreeBSD_version < 500102
fwmem_mmap (struct cdev *dev, vm_offset_t offset, int nproto)
#else
fwmem_mmap (struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nproto)
#endif
{
return EINVAL;
}
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