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freebsd-skq/sys/dev/firewire/if_fwip.c
Attilio Rao 1abcdbd127 When user_frac in the polling subsystem is low it is going to busy the 
CPU for too long period than necessary.  Additively, interfaces are kept
polled (in the tick) even if no more packets are available.
In order to avoid such situations a new generic mechanism can be
implemented in proactive way, keeping track of the time spent on any
packet and fragmenting the time for any tick, stopping the processing
as soon as possible.

In order to implement such mechanism, the polling handler needs to
change, returning the number of packets processed.
While the intended logic is not part of this patch, the polling KPI is
broken by this commit, adding an int return value and the new flag
IFCAP_POLLING_NOCOUNT (which will signal that the return value is
meaningless for the installed handler and checking should be skipped).

Bump __FreeBSD_version in order to signal such situation.

Reviewed by:	emaste
Sponsored by:	Sandvine Incorporated
2009-05-30 15:14:44 +00:00

987 lines
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/*-
* Copyright (c) 2004
* Doug Rabson
* 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.
*
* $FreeBSD$
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#include "opt_inet.h"
#endif
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <sys/taskqueue.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/firewire.h>
#include <net/if_arp.h>
#include <net/if_types.h>
#ifdef __DragonFly__
#include <bus/firewire/firewire.h>
#include <bus/firewire/firewirereg.h>
#include "if_fwipvar.h"
#else
#include <dev/firewire/firewire.h>
#include <dev/firewire/firewirereg.h>
#include <dev/firewire/iec13213.h>
#include <dev/firewire/if_fwipvar.h>
#endif
/*
* We really need a mechanism for allocating regions in the FIFO
* address space. We pick a address in the OHCI controller's 'middle'
* address space. This means that the controller will automatically
* send responses for us, which is fine since we don't have any
* important information to put in the response anyway.
*/
#define INET_FIFO 0xfffe00000000LL
#define FWIPDEBUG if (fwipdebug) if_printf
#define TX_MAX_QUEUE (FWMAXQUEUE - 1)
/* network interface */
static void fwip_start (struct ifnet *);
static int fwip_ioctl (struct ifnet *, u_long, caddr_t);
static void fwip_init (void *);
static void fwip_post_busreset (void *);
static void fwip_output_callback (struct fw_xfer *);
static void fwip_async_output (struct fwip_softc *, struct ifnet *);
static void fwip_start_send (void *, int);
static void fwip_stream_input (struct fw_xferq *);
static void fwip_unicast_input(struct fw_xfer *);
static int fwipdebug = 0;
static int broadcast_channel = 0xc0 | 0x1f; /* tag | channel(XXX) */
static int tx_speed = 2;
static int rx_queue_len = FWMAXQUEUE;
MALLOC_DEFINE(M_FWIP, "if_fwip", "IP over FireWire interface");
SYSCTL_INT(_debug, OID_AUTO, if_fwip_debug, CTLFLAG_RW, &fwipdebug, 0, "");
SYSCTL_DECL(_hw_firewire);
SYSCTL_NODE(_hw_firewire, OID_AUTO, fwip, CTLFLAG_RD, 0,
"Firewire ip subsystem");
SYSCTL_INT(_hw_firewire_fwip, OID_AUTO, rx_queue_len, CTLFLAG_RW, &rx_queue_len,
0, "Length of the receive queue");
TUNABLE_INT("hw.firewire.fwip.rx_queue_len", &rx_queue_len);
#ifdef DEVICE_POLLING
static poll_handler_t fwip_poll;
static int
fwip_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
struct fwip_softc *fwip;
struct firewire_comm *fc;
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
return (0);
fwip = ((struct fwip_eth_softc *)ifp->if_softc)->fwip;
fc = fwip->fd.fc;
fc->poll(fc, (cmd == POLL_AND_CHECK_STATUS)?0:1, count);
return (0);
}
#endif /* DEVICE_POLLING */
static void
fwip_identify(driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, 0, "fwip", device_get_unit(parent));
}
static int
fwip_probe(device_t dev)
{
device_t pa;
pa = device_get_parent(dev);
if(device_get_unit(dev) != device_get_unit(pa)){
return(ENXIO);
}
device_set_desc(dev, "IP over FireWire");
return (0);
}
static int
fwip_attach(device_t dev)
{
struct fwip_softc *fwip;
struct ifnet *ifp;
int unit, s;
struct fw_hwaddr *hwaddr;
fwip = ((struct fwip_softc *)device_get_softc(dev));
unit = device_get_unit(dev);
ifp = fwip->fw_softc.fwip_ifp = if_alloc(IFT_IEEE1394);
if (ifp == NULL)
return (ENOSPC);
mtx_init(&fwip->mtx, "fwip", NULL, MTX_DEF);
/* XXX */
fwip->dma_ch = -1;
fwip->fd.fc = device_get_ivars(dev);
if (tx_speed < 0)
tx_speed = fwip->fd.fc->speed;
fwip->fd.dev = dev;
fwip->fd.post_explore = NULL;
fwip->fd.post_busreset = fwip_post_busreset;
fwip->fw_softc.fwip = fwip;
TASK_INIT(&fwip->start_send, 0, fwip_start_send, fwip);
/*
* Encode our hardware the way that arp likes it.
*/
hwaddr = &IFP2FWC(fwip->fw_softc.fwip_ifp)->fc_hwaddr;
hwaddr->sender_unique_ID_hi = htonl(fwip->fd.fc->eui.hi);
hwaddr->sender_unique_ID_lo = htonl(fwip->fd.fc->eui.lo);
hwaddr->sender_max_rec = fwip->fd.fc->maxrec;
hwaddr->sspd = fwip->fd.fc->speed;
hwaddr->sender_unicast_FIFO_hi = htons((uint16_t)(INET_FIFO >> 32));
hwaddr->sender_unicast_FIFO_lo = htonl((uint32_t)INET_FIFO);
/* fill the rest and attach interface */
ifp->if_softc = &fwip->fw_softc;
#if __FreeBSD_version >= 501113 || defined(__DragonFly__)
if_initname(ifp, device_get_name(dev), unit);
#else
ifp->if_unit = unit;
ifp->if_name = "fwip";
#endif
ifp->if_init = fwip_init;
ifp->if_start = fwip_start;
ifp->if_ioctl = fwip_ioctl;
ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
ifp->if_snd.ifq_maxlen = TX_MAX_QUEUE;
#ifdef DEVICE_POLLING
ifp->if_capabilities |= IFCAP_POLLING;
#endif
s = splimp();
firewire_ifattach(ifp, hwaddr);
splx(s);
FWIPDEBUG(ifp, "interface created\n");
return 0;
}
static void
fwip_stop(struct fwip_softc *fwip)
{
struct firewire_comm *fc;
struct fw_xferq *xferq;
struct ifnet *ifp = fwip->fw_softc.fwip_ifp;
struct fw_xfer *xfer, *next;
int i;
fc = fwip->fd.fc;
if (fwip->dma_ch >= 0) {
xferq = fc->ir[fwip->dma_ch];
if (xferq->flag & FWXFERQ_RUNNING)
fc->irx_disable(fc, fwip->dma_ch);
xferq->flag &=
~(FWXFERQ_MODEMASK | FWXFERQ_OPEN | FWXFERQ_STREAM |
FWXFERQ_EXTBUF | FWXFERQ_HANDLER | FWXFERQ_CHTAGMASK);
xferq->hand = NULL;
for (i = 0; i < xferq->bnchunk; i ++)
m_freem(xferq->bulkxfer[i].mbuf);
free(xferq->bulkxfer, M_FWIP);
fw_bindremove(fc, &fwip->fwb);
for (xfer = STAILQ_FIRST(&fwip->fwb.xferlist); xfer != NULL;
xfer = next) {
next = STAILQ_NEXT(xfer, link);
fw_xfer_free(xfer);
}
for (xfer = STAILQ_FIRST(&fwip->xferlist); xfer != NULL;
xfer = next) {
next = STAILQ_NEXT(xfer, link);
fw_xfer_free(xfer);
}
STAILQ_INIT(&fwip->xferlist);
xferq->bulkxfer = NULL;
fwip->dma_ch = -1;
}
#if defined(__FreeBSD__)
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
#else
ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
#endif
}
static int
fwip_detach(device_t dev)
{
struct fwip_softc *fwip;
struct ifnet *ifp;
int s;
fwip = (struct fwip_softc *)device_get_softc(dev);
ifp = fwip->fw_softc.fwip_ifp;
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(ifp);
#endif
s = splimp();
fwip_stop(fwip);
firewire_ifdetach(ifp);
if_free(ifp);
mtx_destroy(&fwip->mtx);
splx(s);
return 0;
}
static void
fwip_init(void *arg)
{
struct fwip_softc *fwip = ((struct fwip_eth_softc *)arg)->fwip;
struct firewire_comm *fc;
struct ifnet *ifp = fwip->fw_softc.fwip_ifp;
struct fw_xferq *xferq;
struct fw_xfer *xfer;
struct mbuf *m;
int i;
FWIPDEBUG(ifp, "initializing\n");
fc = fwip->fd.fc;
#define START 0
if (fwip->dma_ch < 0) {
fwip->dma_ch = fw_open_isodma(fc, /* tx */0);
if (fwip->dma_ch < 0)
return;
xferq = fc->ir[fwip->dma_ch];
xferq->flag |= FWXFERQ_EXTBUF |
FWXFERQ_HANDLER | FWXFERQ_STREAM;
xferq->flag &= ~0xff;
xferq->flag |= broadcast_channel & 0xff;
/* register fwip_input handler */
xferq->sc = (caddr_t) fwip;
xferq->hand = fwip_stream_input;
xferq->bnchunk = rx_queue_len;
xferq->bnpacket = 1;
xferq->psize = MCLBYTES;
xferq->queued = 0;
xferq->buf = NULL;
xferq->bulkxfer = (struct fw_bulkxfer *) malloc(
sizeof(struct fw_bulkxfer) * xferq->bnchunk,
M_FWIP, M_WAITOK);
if (xferq->bulkxfer == NULL) {
printf("if_fwip: malloc failed\n");
return;
}
STAILQ_INIT(&xferq->stvalid);
STAILQ_INIT(&xferq->stfree);
STAILQ_INIT(&xferq->stdma);
xferq->stproc = NULL;
for (i = 0; i < xferq->bnchunk; i ++) {
m = m_getcl(M_WAIT, MT_DATA, M_PKTHDR);
xferq->bulkxfer[i].mbuf = m;
m->m_len = m->m_pkthdr.len = m->m_ext.ext_size;
STAILQ_INSERT_TAIL(&xferq->stfree,
&xferq->bulkxfer[i], link);
}
fwip->fwb.start = INET_FIFO;
fwip->fwb.end = INET_FIFO + 16384; /* S3200 packet size */
/* pre-allocate xfer */
STAILQ_INIT(&fwip->fwb.xferlist);
for (i = 0; i < rx_queue_len; i ++) {
xfer = fw_xfer_alloc(M_FWIP);
if (xfer == NULL)
break;
m = m_getcl(M_WAIT, MT_DATA, M_PKTHDR);
xfer->recv.payload = mtod(m, uint32_t *);
xfer->recv.pay_len = MCLBYTES;
xfer->hand = fwip_unicast_input;
xfer->fc = fc;
xfer->sc = (caddr_t)fwip;
xfer->mbuf = m;
STAILQ_INSERT_TAIL(&fwip->fwb.xferlist, xfer, link);
}
fw_bindadd(fc, &fwip->fwb);
STAILQ_INIT(&fwip->xferlist);
for (i = 0; i < TX_MAX_QUEUE; i++) {
xfer = fw_xfer_alloc(M_FWIP);
if (xfer == NULL)
break;
xfer->send.spd = tx_speed;
xfer->fc = fwip->fd.fc;
xfer->sc = (caddr_t)fwip;
xfer->hand = fwip_output_callback;
STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link);
}
} else
xferq = fc->ir[fwip->dma_ch];
fwip->last_dest.hi = 0;
fwip->last_dest.lo = 0;
/* start dma */
if ((xferq->flag & FWXFERQ_RUNNING) == 0)
fc->irx_enable(fc, fwip->dma_ch);
#if defined(__FreeBSD__)
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
#else
ifp->if_flags |= IFF_RUNNING;
ifp->if_flags &= ~IFF_OACTIVE;
#endif
#if 0
/* attempt to start output */
fwip_start(ifp);
#endif
}
static int
fwip_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct fwip_softc *fwip = ((struct fwip_eth_softc *)ifp->if_softc)->fwip;
int s, error;
switch (cmd) {
case SIOCSIFFLAGS:
s = splimp();
if (ifp->if_flags & IFF_UP) {
#if defined(__FreeBSD__)
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
#else
if (!(ifp->if_flags & IFF_RUNNING))
#endif
fwip_init(&fwip->fw_softc);
} else {
#if defined(__FreeBSD__)
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
#else
if (ifp->if_flags & IFF_RUNNING)
#endif
fwip_stop(fwip);
}
splx(s);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
break;
case SIOCSIFCAP:
#ifdef DEVICE_POLLING
{
struct ifreq *ifr = (struct ifreq *) data;
struct firewire_comm *fc = fwip->fd.fc;
if (ifr->ifr_reqcap & IFCAP_POLLING &&
!(ifp->if_capenable & IFCAP_POLLING)) {
error = ether_poll_register(fwip_poll, ifp);
if (error)
return(error);
/* Disable interrupts */
fc->set_intr(fc, 0);
ifp->if_capenable |= IFCAP_POLLING |
IFCAP_POLLING_NOCOUNT;
return (error);
}
if (!(ifr->ifr_reqcap & IFCAP_POLLING) &&
ifp->if_capenable & IFCAP_POLLING) {
error = ether_poll_deregister(ifp);
/* Enable interrupts. */
fc->set_intr(fc, 1);
ifp->if_capenable &= ~IFCAP_POLLING;
ifp->if_capenable &= ~IFCAP_POLLING_NOCOUNT;
return (error);
}
}
#endif /* DEVICE_POLLING */
break;
#if defined(__FreeBSD__) && __FreeBSD_version >= 500000
default:
#else
case SIOCSIFADDR:
case SIOCGIFADDR:
case SIOCSIFMTU:
#endif
s = splimp();
error = firewire_ioctl(ifp, cmd, data);
splx(s);
return (error);
#if defined(__DragonFly__) || __FreeBSD_version < 500000
default:
return (EINVAL);
#endif
}
return (0);
}
static void
fwip_post_busreset(void *arg)
{
struct fwip_softc *fwip = arg;
struct crom_src *src;
struct crom_chunk *root;
src = fwip->fd.fc->crom_src;
root = fwip->fd.fc->crom_root;
/* RFC2734 IPv4 over IEEE1394 */
bzero(&fwip->unit4, sizeof(struct crom_chunk));
crom_add_chunk(src, root, &fwip->unit4, CROM_UDIR);
crom_add_entry(&fwip->unit4, CSRKEY_SPEC, CSRVAL_IETF);
crom_add_simple_text(src, &fwip->unit4, &fwip->spec4, "IANA");
crom_add_entry(&fwip->unit4, CSRKEY_VER, 1);
crom_add_simple_text(src, &fwip->unit4, &fwip->ver4, "IPv4");
/* RFC3146 IPv6 over IEEE1394 */
bzero(&fwip->unit6, sizeof(struct crom_chunk));
crom_add_chunk(src, root, &fwip->unit6, CROM_UDIR);
crom_add_entry(&fwip->unit6, CSRKEY_SPEC, CSRVAL_IETF);
crom_add_simple_text(src, &fwip->unit6, &fwip->spec6, "IANA");
crom_add_entry(&fwip->unit6, CSRKEY_VER, 2);
crom_add_simple_text(src, &fwip->unit6, &fwip->ver6, "IPv6");
fwip->last_dest.hi = 0;
fwip->last_dest.lo = 0;
firewire_busreset(fwip->fw_softc.fwip_ifp);
}
static void
fwip_output_callback(struct fw_xfer *xfer)
{
struct fwip_softc *fwip;
struct ifnet *ifp;
int s;
fwip = (struct fwip_softc *)xfer->sc;
ifp = fwip->fw_softc.fwip_ifp;
/* XXX error check */
FWIPDEBUG(ifp, "resp = %d\n", xfer->resp);
if (xfer->resp != 0)
ifp->if_oerrors ++;
m_freem(xfer->mbuf);
fw_xfer_unload(xfer);
s = splimp();
FWIP_LOCK(fwip);
STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link);
FWIP_UNLOCK(fwip);
splx(s);
/* for queue full */
if (ifp->if_snd.ifq_head != NULL) {
fwip_start(ifp);
}
}
static void
fwip_start(struct ifnet *ifp)
{
struct fwip_softc *fwip = ((struct fwip_eth_softc *)ifp->if_softc)->fwip;
int s;
FWIPDEBUG(ifp, "starting\n");
if (fwip->dma_ch < 0) {
struct mbuf *m = NULL;
FWIPDEBUG(ifp, "not ready\n");
s = splimp();
do {
IF_DEQUEUE(&ifp->if_snd, m);
if (m != NULL)
m_freem(m);
ifp->if_oerrors ++;
} while (m != NULL);
splx(s);
return;
}
s = splimp();
#if defined(__FreeBSD__)
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
#else
ifp->if_flags |= IFF_OACTIVE;
#endif
if (ifp->if_snd.ifq_len != 0)
fwip_async_output(fwip, ifp);
#if defined(__FreeBSD__)
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
#else
ifp->if_flags &= ~IFF_OACTIVE;
#endif
splx(s);
}
/* Async. stream output */
static void
fwip_async_output(struct fwip_softc *fwip, struct ifnet *ifp)
{
struct firewire_comm *fc = fwip->fd.fc;
struct mbuf *m;
struct m_tag *mtag;
struct fw_hwaddr *destfw;
struct fw_xfer *xfer;
struct fw_xferq *xferq;
struct fw_pkt *fp;
uint16_t nodeid;
int error;
int i = 0;
xfer = NULL;
xferq = fc->atq;
while ((xferq->queued < xferq->maxq - 1) &&
(ifp->if_snd.ifq_head != NULL)) {
FWIP_LOCK(fwip);
xfer = STAILQ_FIRST(&fwip->xferlist);
if (xfer == NULL) {
FWIP_UNLOCK(fwip);
#if 0
printf("if_fwip: lack of xfer\n");
#endif
break;
}
STAILQ_REMOVE_HEAD(&fwip->xferlist, link);
FWIP_UNLOCK(fwip);
IF_DEQUEUE(&ifp->if_snd, m);
if (m == NULL) {
FWIP_LOCK(fwip);
STAILQ_INSERT_HEAD(&fwip->xferlist, xfer, link);
FWIP_UNLOCK(fwip);
break;
}
/*
* Dig out the link-level address which
* firewire_output got via arp or neighbour
* discovery. If we don't have a link-level address,
* just stick the thing on the broadcast channel.
*/
mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 0);
if (mtag == NULL)
destfw = 0;
else
destfw = (struct fw_hwaddr *) (mtag + 1);
/*
* We don't do any bpf stuff here - the generic code
* in firewire_output gives the packet to bpf before
* it adds the link-level encapsulation.
*/
/*
* Put the mbuf in the xfer early in case we hit an
* error case below - fwip_output_callback will free
* the mbuf.
*/
xfer->mbuf = m;
/*
* We use the arp result (if any) to add a suitable firewire
* packet header before handing off to the bus.
*/
fp = &xfer->send.hdr;
nodeid = FWLOCALBUS | fc->nodeid;
if ((m->m_flags & M_BCAST) || !destfw) {
/*
* Broadcast packets are sent as GASP packets with
* specifier ID 0x00005e, version 1 on the broadcast
* channel. To be conservative, we send at the
* slowest possible speed.
*/
uint32_t *p;
M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT);
p = mtod(m, uint32_t *);
fp->mode.stream.len = m->m_pkthdr.len;
fp->mode.stream.chtag = broadcast_channel;
fp->mode.stream.tcode = FWTCODE_STREAM;
fp->mode.stream.sy = 0;
xfer->send.spd = 0;
p[0] = htonl(nodeid << 16);
p[1] = htonl((0x5e << 24) | 1);
} else {
/*
* Unicast packets are sent as block writes to the
* target's unicast fifo address. If we can't
* find the node address, we just give up. We
* could broadcast it but that might overflow
* the packet size limitations due to the
* extra GASP header. Note: the hardware
* address is stored in network byte order to
* make life easier for ARP.
*/
struct fw_device *fd;
struct fw_eui64 eui;
eui.hi = ntohl(destfw->sender_unique_ID_hi);
eui.lo = ntohl(destfw->sender_unique_ID_lo);
if (fwip->last_dest.hi != eui.hi ||
fwip->last_dest.lo != eui.lo) {
fd = fw_noderesolve_eui64(fc, &eui);
if (!fd) {
/* error */
ifp->if_oerrors ++;
/* XXX set error code */
fwip_output_callback(xfer);
continue;
}
fwip->last_hdr.mode.wreqb.dst = FWLOCALBUS | fd->dst;
fwip->last_hdr.mode.wreqb.tlrt = 0;
fwip->last_hdr.mode.wreqb.tcode = FWTCODE_WREQB;
fwip->last_hdr.mode.wreqb.pri = 0;
fwip->last_hdr.mode.wreqb.src = nodeid;
fwip->last_hdr.mode.wreqb.dest_hi =
ntohs(destfw->sender_unicast_FIFO_hi);
fwip->last_hdr.mode.wreqb.dest_lo =
ntohl(destfw->sender_unicast_FIFO_lo);
fwip->last_hdr.mode.wreqb.extcode = 0;
fwip->last_dest = eui;
}
fp->mode.wreqb = fwip->last_hdr.mode.wreqb;
fp->mode.wreqb.len = m->m_pkthdr.len;
xfer->send.spd = min(destfw->sspd, fc->speed);
}
xfer->send.pay_len = m->m_pkthdr.len;
error = fw_asyreq(fc, -1, xfer);
if (error == EAGAIN) {
/*
* We ran out of tlabels - requeue the packet
* for later transmission.
*/
xfer->mbuf = 0;
FWIP_LOCK(fwip);
STAILQ_INSERT_TAIL(&fwip->xferlist, xfer, link);
FWIP_UNLOCK(fwip);
IF_PREPEND(&ifp->if_snd, m);
break;
}
if (error) {
/* error */
ifp->if_oerrors ++;
/* XXX set error code */
fwip_output_callback(xfer);
continue;
} else {
ifp->if_opackets ++;
i++;
}
}
#if 0
if (i > 1)
printf("%d queued\n", i);
#endif
if (i > 0)
xferq->start(fc);
}
static void
fwip_start_send (void *arg, int count)
{
struct fwip_softc *fwip = arg;
fwip->fd.fc->atq->start(fwip->fd.fc);
}
/* Async. stream output */
static void
fwip_stream_input(struct fw_xferq *xferq)
{
struct mbuf *m, *m0;
struct m_tag *mtag;
struct ifnet *ifp;
struct fwip_softc *fwip;
struct fw_bulkxfer *sxfer;
struct fw_pkt *fp;
uint16_t src;
uint32_t *p;
fwip = (struct fwip_softc *)xferq->sc;
ifp = fwip->fw_softc.fwip_ifp;
while ((sxfer = STAILQ_FIRST(&xferq->stvalid)) != NULL) {
STAILQ_REMOVE_HEAD(&xferq->stvalid, link);
fp = mtod(sxfer->mbuf, struct fw_pkt *);
if (fwip->fd.fc->irx_post != NULL)
fwip->fd.fc->irx_post(fwip->fd.fc, fp->mode.ld);
m = sxfer->mbuf;
/* insert new rbuf */
sxfer->mbuf = m0 = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (m0 != NULL) {
m0->m_len = m0->m_pkthdr.len = m0->m_ext.ext_size;
STAILQ_INSERT_TAIL(&xferq->stfree, sxfer, link);
} else
printf("fwip_as_input: m_getcl failed\n");
/*
* We must have a GASP header - leave the
* encapsulation sanity checks to the generic
* code. Remeber that we also have the firewire async
* stream header even though that isn't accounted for
* in mode.stream.len.
*/
if (sxfer->resp != 0 || fp->mode.stream.len <
2*sizeof(uint32_t)) {
m_freem(m);
ifp->if_ierrors ++;
continue;
}
m->m_len = m->m_pkthdr.len = fp->mode.stream.len
+ sizeof(fp->mode.stream);
/*
* If we received the packet on the broadcast channel,
* mark it as broadcast, otherwise we assume it must
* be multicast.
*/
if (fp->mode.stream.chtag == broadcast_channel)
m->m_flags |= M_BCAST;
else
m->m_flags |= M_MCAST;
/*
* Make sure we recognise the GASP specifier and
* version.
*/
p = mtod(m, uint32_t *);
if ((((ntohl(p[1]) & 0xffff) << 8) | ntohl(p[2]) >> 24) != 0x00005e
|| (ntohl(p[2]) & 0xffffff) != 1) {
FWIPDEBUG(ifp, "Unrecognised GASP header %#08x %#08x\n",
ntohl(p[1]), ntohl(p[2]));
m_freem(m);
ifp->if_ierrors ++;
continue;
}
/*
* Record the sender ID for possible BPF usage.
*/
src = ntohl(p[1]) >> 16;
if (bpf_peers_present(ifp->if_bpf)) {
mtag = m_tag_alloc(MTAG_FIREWIRE,
MTAG_FIREWIRE_SENDER_EUID,
2*sizeof(uint32_t), M_NOWAIT);
if (mtag) {
/* bpf wants it in network byte order */
struct fw_device *fd;
uint32_t *p = (uint32_t *) (mtag + 1);
fd = fw_noderesolve_nodeid(fwip->fd.fc,
src & 0x3f);
if (fd) {
p[0] = htonl(fd->eui.hi);
p[1] = htonl(fd->eui.lo);
} else {
p[0] = 0;
p[1] = 0;
}
m_tag_prepend(m, mtag);
}
}
/*
* Trim off the GASP header
*/
m_adj(m, 3*sizeof(uint32_t));
m->m_pkthdr.rcvif = ifp;
firewire_input(ifp, m, src);
ifp->if_ipackets ++;
}
if (STAILQ_FIRST(&xferq->stfree) != NULL)
fwip->fd.fc->irx_enable(fwip->fd.fc, fwip->dma_ch);
}
static __inline void
fwip_unicast_input_recycle(struct fwip_softc *fwip, struct fw_xfer *xfer)
{
struct mbuf *m;
/*
* We have finished with a unicast xfer. Allocate a new
* cluster and stick it on the back of the input queue.
*/
m = m_getcl(M_WAIT, MT_DATA, M_PKTHDR);
xfer->mbuf = m;
xfer->recv.payload = mtod(m, uint32_t *);
xfer->recv.pay_len = MCLBYTES;
xfer->mbuf = m;
STAILQ_INSERT_TAIL(&fwip->fwb.xferlist, xfer, link);
}
static void
fwip_unicast_input(struct fw_xfer *xfer)
{
uint64_t address;
struct mbuf *m;
struct m_tag *mtag;
struct ifnet *ifp;
struct fwip_softc *fwip;
struct fw_pkt *fp;
//struct fw_pkt *sfp;
int rtcode;
fwip = (struct fwip_softc *)xfer->sc;
ifp = fwip->fw_softc.fwip_ifp;
m = xfer->mbuf;
xfer->mbuf = 0;
fp = &xfer->recv.hdr;
/*
* Check the fifo address - we only accept addresses of
* exactly INET_FIFO.
*/
address = ((uint64_t)fp->mode.wreqb.dest_hi << 32)
| fp->mode.wreqb.dest_lo;
if (fp->mode.wreqb.tcode != FWTCODE_WREQB) {
rtcode = FWRCODE_ER_TYPE;
} else if (address != INET_FIFO) {
rtcode = FWRCODE_ER_ADDR;
} else {
rtcode = FWRCODE_COMPLETE;
}
/*
* Pick up a new mbuf and stick it on the back of the receive
* queue.
*/
fwip_unicast_input_recycle(fwip, xfer);
/*
* If we've already rejected the packet, give up now.
*/
if (rtcode != FWRCODE_COMPLETE) {
m_freem(m);
ifp->if_ierrors ++;
return;
}
if (bpf_peers_present(ifp->if_bpf)) {
/*
* Record the sender ID for possible BPF usage.
*/
mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID,
2*sizeof(uint32_t), M_NOWAIT);
if (mtag) {
/* bpf wants it in network byte order */
struct fw_device *fd;
uint32_t *p = (uint32_t *) (mtag + 1);
fd = fw_noderesolve_nodeid(fwip->fd.fc,
fp->mode.wreqb.src & 0x3f);
if (fd) {
p[0] = htonl(fd->eui.hi);
p[1] = htonl(fd->eui.lo);
} else {
p[0] = 0;
p[1] = 0;
}
m_tag_prepend(m, mtag);
}
}
/*
* Hand off to the generic encapsulation code. We don't use
* ifp->if_input so that we can pass the source nodeid as an
* argument to facilitate link-level fragment reassembly.
*/
m->m_len = m->m_pkthdr.len = fp->mode.wreqb.len;
m->m_pkthdr.rcvif = ifp;
firewire_input(ifp, m, fp->mode.wreqb.src);
ifp->if_ipackets ++;
}
static devclass_t fwip_devclass;
static device_method_t fwip_methods[] = {
/* device interface */
DEVMETHOD(device_identify, fwip_identify),
DEVMETHOD(device_probe, fwip_probe),
DEVMETHOD(device_attach, fwip_attach),
DEVMETHOD(device_detach, fwip_detach),
{ 0, 0 }
};
static driver_t fwip_driver = {
"fwip",
fwip_methods,
sizeof(struct fwip_softc),
};
#ifdef __DragonFly__
DECLARE_DUMMY_MODULE(fwip);
#endif
DRIVER_MODULE(fwip, firewire, fwip_driver, fwip_devclass, 0, 0);
MODULE_VERSION(fwip, 1);
MODULE_DEPEND(fwip, firewire, 1, 1, 1);
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