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/*-
* Copyright (c) 2001-2003
* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
* 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 THE AUTHOR 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 AUTHOR 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.
*
* Author: Hartmut Brandt <harti@freebsd.org>
*
* ForeHE driver.
*
* Receive.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/hatm/if_hatm_rx.c 148887 2005-08-09 10:20:02Z rwatson $");
#include "opt_inet.h"
#include "opt_natm.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/errno.h>
#include <sys/conf.h>
#include <sys/module.h>
#include <sys/queue.h>
#include <sys/syslog.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <vm/uma.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_media.h>
#include <net/if_atm.h>
#include <net/route.h>
#ifdef ENABLE_BPF
#include <net/bpf.h>
#endif
#include <netinet/in.h>
#include <netinet/if_atm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/utopia/utopia.h>
#include <dev/hatm/if_hatmconf.h>
#include <dev/hatm/if_hatmreg.h>
#include <dev/hatm/if_hatmvar.h>
void
hatm_rx(struct hatm_softc *sc, u_int cid, u_int flags, struct mbuf *m0,
u_int len)
{
struct hevcc *vcc;
struct atm_pseudohdr aph;
struct mbuf *m, *m1;
u_int vpi, vci;
u_char *ptr;
DBG(sc, RX, ("cid=%#x flags=%#x len=%u mbuf=%p", cid, flags, len, m0));
vcc = sc->vccs[cid];
if (vcc == NULL)
goto drop;
if (flags & HE_REGM_RBRQ_CON_CLOSED) {
if (vcc->vflags & HE_VCC_RX_CLOSING) {
vcc->vflags &= ~HE_VCC_RX_CLOSING;
if (vcc->param.flags & ATMIO_FLAG_ASYNC) {
if (!(vcc->vflags & HE_VCC_OPEN))
hatm_vcc_closed(sc, cid);
} else
cv_signal(&sc->vcc_cv);
}
goto drop;
}
if (!(vcc->vflags & HE_VCC_RX_OPEN))
goto drop;
if (flags & HE_REGM_RBRQ_HBUF_ERROR) {
sc->istats.hbuf_error++;
if (vcc->chain != NULL) {
m_freem(vcc->chain);
vcc->chain = vcc->last = NULL;
}
goto drop;
}
if (m0 == NULL) {
sc->istats.no_rcv_mbuf++;
return;
}
if ((m0->m_len = len) == 0) {
sc->istats.empty_hbuf++;
m_free(m0);
} else if (vcc->chain == NULL) {
sc->istats.rx_seg++;
vcc->chain = vcc->last = m0;
vcc->last->m_next = NULL;
vcc->chain->m_pkthdr.len = m0->m_len;
vcc->chain->m_pkthdr.rcvif = sc->ifp;
} else {
sc->istats.rx_seg++;
vcc->last->m_next = m0;
vcc->last = m0;
vcc->last->m_next = NULL;
vcc->chain->m_pkthdr.len += m0->m_len;
}
if (!(flags & HE_REGM_RBRQ_END_PDU))
return;
if (flags & HE_REGM_RBRQ_CRC_ERROR) {
if (vcc->chain)
m_freem(vcc->chain);
vcc->chain = vcc->last = NULL;
sc->istats.crc_error++;
sc->ifp->if_ierrors++;
return;
}
if (flags & HE_REGM_RBRQ_LEN_ERROR) {
if (vcc->chain)
m_freem(vcc->chain);
vcc->chain = vcc->last = NULL;
sc->istats.len_error++;
sc->ifp->if_ierrors++;
return;
}
#ifdef HATM_DEBUG
if (sc->debug & DBG_DUMP) {
struct mbuf *tmp;
for (tmp = vcc->chain; tmp != NULL; tmp = tmp->m_next) {
printf("mbuf %p: len=%u\n", tmp, tmp->m_len);
for (ptr = mtod(tmp, u_char *);
ptr < mtod(tmp, u_char *) + tmp->m_len; ptr++)
printf("%02x ", *ptr);
printf("\n");
}
}
#endif
if (vcc->param.aal == ATMIO_AAL_5) {
/*
* Need to remove padding and the trailer. The trailer
* may be split accross buffers according to 2.10.1.2
* Assume that mbufs sizes are even (buffer sizes and cell
* payload sizes are) and that there are no empty mbufs.
*/
m = vcc->last;
if (m->m_len == 2) {
/* Ah, oh, only part of CRC */
if (m == vcc->chain) {
/* ups */
sc->istats.short_aal5++;
m_freem(vcc->chain);
vcc->chain = vcc->last = NULL;
return;
}
for (m1 = vcc->chain; m1->m_next != m; m1 = m1->m_next)
;
ptr = (u_char *)m1->m_data + m1->m_len - 4;
} else if (m->m_len == 4) {
/* Ah, oh, only CRC */
if (m == vcc->chain) {
/* ups */
sc->istats.short_aal5++;
m_freem(vcc->chain);
vcc->chain = vcc->last = NULL;
return;
}
for (m1 = vcc->chain; m1->m_next != m; m1 = m1->m_next)
;
ptr = (u_char *)m1->m_data + m1->m_len - 2;
} else if (m->m_len >= 6) {
ptr = (u_char *)m->m_data + m->m_len - 6;
} else
panic("hatm_rx: bad mbuf len %d", m->m_len);
len = (ptr[0] << 8) + ptr[1];
if (len > (u_int)vcc->chain->m_pkthdr.len - 4) {
sc->istats.badlen_aal5++;
m_freem(vcc->chain);
vcc->chain = vcc->last = NULL;
return;
}
m_adj(vcc->chain, -(vcc->chain->m_pkthdr.len - len));
}
m = vcc->chain;
vcc->chain = vcc->last = NULL;
#ifdef ENABLE_BPF
if (!(vcc->param.flags & ATMIO_FLAG_NG) &&
(vcc->param.aal == ATMIO_AAL_5) &&
(vcc->param.flags & ATM_PH_LLCSNAP))
BPF_MTAP(sc->ifp, m);
#endif
vpi = HE_VPI(cid);
vci = HE_VCI(cid);
ATM_PH_FLAGS(&aph) = vcc->param.flags & 0xff;
ATM_PH_VPI(&aph) = vpi;
ATM_PH_SETVCI(&aph, vci);
sc->ifp->if_ipackets++;
/* this is in if_atmsubr.c */
/* sc->ifp->if_ibytes += len; */
vcc->ibytes += len;
vcc->ipackets++;
#if 0
{
struct mbuf *tmp;
for (tmp = m; tmp != NULL; tmp = tmp->m_next) {
printf("mbuf %p: len=%u\n", tmp, tmp->m_len);
for (ptr = mtod(tmp, u_char *);
ptr < mtod(tmp, u_char *) + tmp->m_len; ptr++)
printf("%02x ", *ptr);
printf("\n");
}
}
#endif
atm_input(sc->ifp, &aph, m, vcc->rxhand);
return;
drop:
if (m0 != NULL)
m_free(m0);
}
void
hatm_rx_vcc_open(struct hatm_softc *sc, u_int cid)
{
struct hevcc *vcc = sc->vccs[cid];
uint32_t rsr0, rsr1, rsr4;
rsr0 = rsr1 = rsr4 = 0;
if (vcc->param.traffic == ATMIO_TRAFFIC_ABR) {
rsr1 |= HE_REGM_RSR1_AQI;
rsr4 |= HE_REGM_RSR4_AQI;
}
if (vcc->param.aal == ATMIO_AAL_5) {
rsr0 |= HE_REGM_RSR0_STARTPDU | HE_REGM_RSR0_AAL_5;
} else if (vcc->param.aal == ATMIO_AAL_0) {
rsr0 |= HE_REGM_RSR0_AAL_0;
} else {
if (sc->rbp_s1.size != 0) {
rsr1 |= (1 << HE_REGS_RSR1_GROUP);
rsr4 |= (1 << HE_REGS_RSR4_GROUP);
}
rsr0 |= HE_REGM_RSR0_AAL_RAW | HE_REGM_RSR0_PTI7 |
HE_REGM_RSR0_RM | HE_REGM_RSR0_F5OAM;
}
rsr0 |= HE_REGM_RSR0_OPEN;
WRITE_RSR(sc, cid, 0, 0xf, rsr0);
WRITE_RSR(sc, cid, 1, 0xf, rsr1);
WRITE_RSR(sc, cid, 4, 0xf, rsr4);
vcc->vflags |= HE_VCC_RX_OPEN;
}
/*
* Close the RX side of a VCC.
*/
void
hatm_rx_vcc_close(struct hatm_softc *sc, u_int cid)
{
struct hevcc *vcc = sc->vccs[cid];
uint32_t v;
vcc->vflags |= HE_VCC_RX_CLOSING;
WRITE_RSR(sc, cid, 0, 0xf, 0);
v = READ4(sc, HE_REGO_RCCSTAT);
while ((sc->ifp->if_drv_flags & IFF_DRV_RUNNING) &&
(READ4(sc, HE_REGO_RCCSTAT) & HE_REGM_RCCSTAT_PROG))
cv_timedwait(&sc->cv_rcclose, &sc->mtx, 1);
if (!(sc->ifp->if_drv_flags & IFF_DRV_RUNNING))
return;
WRITE_MBOX4(sc, HE_REGO_RCON_CLOSE, cid);
vcc->vflags |= HE_VCC_RX_CLOSING;
vcc->vflags &= ~HE_VCC_RX_OPEN;
}