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freebsd/sys/dev/ar/if_ar.c
Julian Elischer 589f6ed8ce Divorce the kernel binary ABI version number from the message 
format version number. (userland programs should not need to be
recompiled when the netgraph kernel internal ABI is changed.

Also fix modules that don;t handle the fact that a caller may not supply
a return message pointer. (benign at the moment because the calling code
checks, but that will change)
2000-12-18 20:03:32 +00:00

2406 lines
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/*
* Copyright (c) 1995, 1999 John Hay. 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. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY John Hay ``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 John Hay 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.
*
* $FreeBSD$
*/
/*
* Programming assumptions and other issues.
*
* The descriptors of a DMA channel will fit in a 16K memory window.
*
* The buffers of a transmit DMA channel will fit in a 16K memory window.
*
* Only the ISA bus cards with X.21 and V.35 is tested.
*
* When interface is going up, handshaking is set and it is only cleared
* when the interface is down'ed.
*
* There should be a way to set/reset Raw HDLC/PPP, Loopback, DCE/DTE,
* internal/external clock, etc.....
*
*/
#include "opt_netgraph.h"
#include "ar.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/sockio.h>
#include <sys/socket.h>
#include <sys/bus.h>
#include <net/if.h>
#ifdef NETGRAPH
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <sys/syslog.h>
#include <i386/isa/if_ar.h>
#else /* NETGRAPH */
#include <net/if_sppp.h>
#include <net/bpf.h>
#endif /* NETGRAPH */
#include <machine/md_var.h>
#include <i386/isa/if_arregs.h>
#include <i386/isa/ic/hd64570.h>
#include <i386/isa/isa_device.h>
#ifndef COMPAT_OLDISA
#error "The ar device requires the old isa compatibility shims"
#endif
#ifndef NETGRAPH
#include "sppp.h"
#if NSPPP <= 0
#error device 'ar' require sppp.
#endif /* NSPPP <= 0 */
#endif /* NETGRAPH */
#ifdef TRACE
#define TRC(x) x
#else
#define TRC(x)
#endif
#define TRCL(x) x
#define PPP_HEADER_LEN 4
#define ARC_GET_WIN(addr) ((addr >> ARC_WIN_SHFT) & AR_WIN_MSK)
#define ARC_SET_MEM(iobase,win) outb(iobase+AR_MSCA_EN, AR_ENA_MEM | \
ARC_GET_WIN(win))
#define ARC_SET_SCA(iobase,ch) outb(iobase+AR_MSCA_EN, AR_ENA_MEM | \
AR_ENA_SCA | (ch ? AR_SEL_SCA_1:AR_SEL_SCA_0))
#define ARC_SET_OFF(iobase) outb(iobase+AR_MSCA_EN, 0)
struct ar_hardc {
int cunit;
struct ar_softc *sc;
u_short iobase;
int isa_irq;
int numports;
caddr_t mem_start;
caddr_t mem_end;
u_char *orbase;
u_int memsize; /* in bytes */
u_int winsize; /* in bytes */
u_int winmsk;
u_char bustype; /* ISA, MCA, PCI.... */
u_char interface[NPORT];/* X21, V.35, EIA-530.... */
u_char revision;
u_char handshake; /* handshake lines supported by card. */
u_char txc_dtr[NPORT/NCHAN]; /* the register is write only */
u_int txc_dtr_off[NPORT/NCHAN];
sca_regs *sca[NPORT/NCHAN];
};
static int next_ar_unit = 0;
static struct ar_hardc ar_hardc[NAR];
struct ar_softc {
#ifndef NETGRAPH
struct sppp ifsppp;
#endif /* NETGRAPH */
int unit; /* With regards to all ar devices */
int subunit; /* With regards to this card */
struct ar_hardc *hc;
struct buf_block {
u_int txdesc; /* On card address */
u_int txstart; /* On card address */
u_int txend; /* On card address */
u_int txtail; /* Index of first unused buffer */
u_int txmax; /* number of usable buffers/descriptors */
u_int txeda; /* Error descriptor addresses */
}block[AR_TX_BLOCKS];
char xmit_busy; /* Transmitter is busy */
char txb_inuse; /* Number of tx blocks currently in use */
u_char txb_new; /* Index to where new buffer will be added */
u_char txb_next_tx; /* Index to next block ready to tx */
u_int rxdesc; /* On card address */
u_int rxstart; /* On card address */
u_int rxend; /* On card address */
u_int rxhind; /* Index to the head of the rx buffers. */
u_int rxmax; /* number of usable buffers/descriptors */
int scano;
int scachan;
sca_regs *sca;
#ifdef NETGRAPH
int running; /* something is attached so we are running */
int dcd; /* do we have dcd? */
/* ---netgraph bits --- */
char nodename[NG_NODELEN + 1]; /* store our node name */
int datahooks; /* number of data hooks attached */
node_p node; /* netgraph node */
hook_p hook; /* data hook */
hook_p debug_hook;
struct ifqueue xmitq_hipri; /* hi-priority transmit queue */
struct ifqueue xmitq; /* transmit queue */
int flags; /* state */
#define SCF_RUNNING 0x01 /* board is active */
#define SCF_OACTIVE 0x02 /* output is active */
int out_dog; /* watchdog cycles output count-down */
struct callout_handle handle; /* timeout(9) handle */
u_long inbytes, outbytes; /* stats */
u_long lastinbytes, lastoutbytes; /* a second ago */
u_long inrate, outrate; /* highest rate seen */
u_long inlast; /* last input N secs ago */
u_long out_deficit; /* output since last input */
u_long oerrors, ierrors[6];
u_long opackets, ipackets;
#endif /* NETGRAPH */
};
#ifdef NETGRAPH
#define DOG_HOLDOFF 6 /* dog holds off for 6 secs */
#define QUITE_A_WHILE 300 /* 5 MINUTES */
#define LOTS_OF_PACKETS 100
#endif /* NETGRAPH */
static int arprobe(struct isa_device *id);
static int arattach_isa(struct isa_device *id);
/*
* This translate from irq numbers to
* the value that the arnet card needs
* in the lower part of the AR_INT_SEL
* register.
*/
static int irqtable[16] = {
0, /* 0 */
0, /* 1 */
0, /* 2 */
1, /* 3 */
0, /* 4 */
2, /* 5 */
0, /* 6 */
3, /* 7 */
0, /* 8 */
0, /* 9 */
4, /* 10 */
5, /* 11 */
6, /* 12 */
0, /* 13 */
0, /* 14 */
7 /* 15 */
};
struct isa_driver ardriver = {
INTR_TYPE_NET,
arprobe,
arattach_isa,
"ar"
};
COMPAT_ISA_DRIVER(ar, ardriver);
struct ar_hardc *arattach_pci(int unit, vm_offset_t mem_addr);
void arintr_hc(struct ar_hardc *hc);
static ointhand2_t arintr;
static int arattach(struct ar_hardc *hc);
static void ar_xmit(struct ar_softc *sc);
#ifndef NETGRAPH
static void arstart(struct ifnet *ifp);
static int arioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
static void arwatchdog(struct ifnet *ifp);
#else /* NETGRAPH */
static void arstart(struct ar_softc *sc);
static void arwatchdog(struct ar_softc *sc);
#endif /* NETGRAPH */
static int ar_packet_avail(struct ar_softc *sc, int *len, u_char *rxstat);
static void ar_copy_rxbuf(struct mbuf *m, struct ar_softc *sc, int len);
static void ar_eat_packet(struct ar_softc *sc, int single);
static void ar_get_packets(struct ar_softc *sc);
static int ar_read_pim_iface(volatile struct ar_hardc *hc, int channel);
static void ar_up(struct ar_softc *sc);
static void ar_down(struct ar_softc *sc);
static void arc_init(struct ar_hardc *hc);
static void ar_init_sca(struct ar_hardc *hc, int scano);
static void ar_init_msci(struct ar_softc *sc);
static void ar_init_rx_dmac(struct ar_softc *sc);
static void ar_init_tx_dmac(struct ar_softc *sc);
static void ar_dmac_intr(struct ar_hardc *hc, int scano, u_char isr);
static void ar_msci_intr(struct ar_hardc *hc, int scano, u_char isr);
static void ar_timer_intr(struct ar_hardc *hc, int scano, u_char isr);
#ifdef NETGRAPH
static void ngar_watchdog_frame(void * arg);
static void ngar_init(void* ignored);
static ng_constructor_t ngar_constructor;
static ng_rcvmsg_t ngar_rcvmsg;
static ng_shutdown_t ngar_rmnode;
static ng_newhook_t ngar_newhook;
/*static ng_findhook_t ngar_findhook; */
static ng_connect_t ngar_connect;
static ng_rcvdata_t ngar_rcvdata;
static ng_disconnect_t ngar_disconnect;
static struct ng_type typestruct = {
NG_ABI_VERSION,
NG_AR_NODE_TYPE,
NULL,
ngar_constructor,
ngar_rcvmsg,
ngar_rmnode,
ngar_newhook,
NULL,
ngar_connect,
ngar_rcvdata,
ngar_disconnect,
NULL
};
static int ngar_done_init = 0;
#endif /* NETGRAPH */
/*
* Register the Adapter.
* Probe to see if it is there.
* Get its information and fill it in.
*/
static int
arprobe(struct isa_device *id)
{
struct ar_hardc *hc = &ar_hardc[id->id_unit];
u_int tmp;
u_short port;
/*
* Register the card.
*/
/*
* Now see if the card is realy there.
*
* XXX For now I just check the undocumented ports
* for "570". We will probably have to do more checking.
*/
port = id->id_iobase;
if((inb(port+AR_ID_5) != '5') || (inb(port+AR_ID_7) != '7') ||
(inb(port+AR_ID_0) != '0'))
return 0;
/*
* We have a card here, fill in what we can.
*/
tmp = inb(port + AR_BMI);
hc->bustype = tmp & AR_BUS_MSK;
hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
hc->memsize = 1 << hc->memsize;
hc->memsize <<= 16;
hc->interface[0] = (tmp & AR_IFACE_MSK);
hc->interface[1] = hc->interface[0];
hc->interface[2] = hc->interface[0];
hc->interface[3] = hc->interface[0];
tmp = inb(port + AR_REV);
hc->revision = tmp & AR_REV_MSK;
hc->winsize = 1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT);
hc->winsize *= ARC_WIN_SIZ;
hc->winmsk = hc->winsize - 1;
hc->numports = inb(port + AR_PNUM);
hc->handshake = inb(port + AR_HNDSH);
id->id_msize = hc->winsize;
hc->iobase = id->id_iobase;
hc->mem_start = id->id_maddr;
hc->mem_end = id->id_maddr + id->id_msize;
hc->cunit = id->id_unit;
hc->isa_irq = id->id_irq;
switch(hc->interface[0]) {
case AR_IFACE_EIA_232:
printf("ar%d: The EIA 232 interface is not supported.\n",
id->id_unit);
return 0;
case AR_IFACE_V_35:
break;
case AR_IFACE_EIA_530:
printf("ar%d: WARNING: The EIA 530 interface is untested.\n",
id->id_unit);
break;
case AR_IFACE_X_21:
break;
case AR_IFACE_COMBO:
printf("ar%d: WARNING: The COMBO interface is untested.\n",
id->id_unit);
break;
}
/*
* Do a little sanity check.
*/
if((hc->numports > NPORT) || (hc->memsize > (512*1024)))
return 0;
return ARC_IO_SIZ; /* return the amount of IO addresses used. */
}
/*
* Malloc memory for the softc structures.
* Reset the card to put it in a known state.
* Register the ports on the adapter.
* Fill in the info for each port.
* Attach each port to sppp and bpf.
*/
static int
arattach_isa(struct isa_device *id)
{
struct ar_hardc *hc = &ar_hardc[id->id_unit];
id->id_ointr = arintr;
return arattach(hc);
}
struct ar_hardc *
arattach_pci(int unit, vm_offset_t mem_addr)
{
struct ar_hardc *hc;
u_int i, tmp;
hc = malloc(sizeof(struct ar_hardc), M_DEVBUF, M_WAITOK | M_ZERO);
hc->cunit = unit;
hc->mem_start = (caddr_t)mem_addr;
hc->sca[0] = (sca_regs *)(mem_addr + AR_PCI_SCA_1_OFFSET);
hc->sca[1] = (sca_regs *)(mem_addr + AR_PCI_SCA_2_OFFSET);
hc->iobase = 0;
hc->orbase = (u_char *)(mem_addr + AR_PCI_ORBASE_OFFSET);
tmp = hc->orbase[AR_BMI * 4];
hc->bustype = tmp & AR_BUS_MSK;
hc->memsize = (tmp & AR_MEM_MSK) >> AR_MEM_SHFT;
hc->memsize = 1 << hc->memsize;
hc->memsize <<= 16;
hc->interface[0] = (tmp & AR_IFACE_MSK);
tmp = hc->orbase[AR_REV * 4];
hc->revision = tmp & AR_REV_MSK;
hc->winsize = (1 << ((tmp & AR_WSIZ_MSK) >> AR_WSIZ_SHFT)) * 16 * 1024;
hc->mem_end = (caddr_t)(mem_addr + hc->winsize);
hc->winmsk = hc->winsize - 1;
hc->numports = hc->orbase[AR_PNUM * 4];
hc->handshake = hc->orbase[AR_HNDSH * 4];
for(i = 1; i < hc->numports; i++)
hc->interface[i] = hc->interface[0];
TRC(printf("arp%d: bus %x, rev %d, memstart %p, winsize %d, "
"winmsk %x, interface %x\n",
unit, hc->bustype, hc->revision, hc->mem_start, hc->winsize,
hc->winmsk, hc->interface[0]));
arattach(hc);
return hc;
}
static int
arattach(struct ar_hardc *hc)
{
struct ar_softc *sc;
#ifndef NETGRAPH
struct ifnet *ifp;
char *iface;
#endif /* NETGRAPH */
int unit;
printf("arc%d: %uK RAM, %u ports, rev %u.\n",
hc->cunit,
hc->memsize/1024,
hc->numports,
hc->revision);
arc_init(hc);
sc = hc->sc;
for(unit=0;unit<hc->numports;unit+=NCHAN)
ar_init_sca(hc, unit / NCHAN);
/*
* Now configure each port on the card.
*/
for(unit=0;unit<hc->numports;sc++,unit++) {
sc->hc = hc;
sc->subunit = unit;
sc->unit = next_ar_unit;
next_ar_unit++;
sc->scano = unit / NCHAN;
sc->scachan = unit%NCHAN;
ar_init_rx_dmac(sc);
ar_init_tx_dmac(sc);
ar_init_msci(sc);
#ifndef NETGRAPH
ifp = &sc->ifsppp.pp_if;
ifp->if_softc = sc;
ifp->if_unit = sc->unit;
ifp->if_name = "ar";
ifp->if_mtu = PP_MTU;
ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
ifp->if_ioctl = arioctl;
ifp->if_start = arstart;
ifp->if_watchdog = arwatchdog;
sc->ifsppp.pp_flags = PP_KEEPALIVE;
switch(hc->interface[unit]) {
default: iface = "UNKNOWN"; break;
case AR_IFACE_EIA_232: iface = "EIA-232"; break;
case AR_IFACE_V_35: iface = "EIA-232 or V.35"; break;
case AR_IFACE_EIA_530: iface = "EIA-530"; break;
case AR_IFACE_X_21: iface = "X.21"; break;
case AR_IFACE_COMBO: iface = "COMBO X.21 / EIA-530"; break;
}
printf("ar%d: Adapter %d, port %d, interface %s.\n",
sc->unit,
hc->cunit,
sc->subunit,
iface);
sppp_attach((struct ifnet *)&sc->ifsppp);
if_attach(ifp);
bpfattach(ifp, DLT_PPP, PPP_HEADER_LEN);
#else /* NETGRAPH */
/*
* we have found a node, make sure our 'type' is availabe.
*/
if (ngar_done_init == 0) ngar_init(NULL);
if (ng_make_node_common(&typestruct, &sc->node) != 0)
return (0);
sc->node->private = sc;
callout_handle_init(&sc->handle);
sc->xmitq.ifq_maxlen = IFQ_MAXLEN;
sc->xmitq_hipri.ifq_maxlen = IFQ_MAXLEN;
mtx_init(&sc->xmitq.ifq_mtx, "ar_xmitq", MTX_DEF);
mtx_init(&sc->xmitq_hipri.ifq_mtx, "ar_xmitq_hipri", MTX_DEF);
sprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit);
if (ng_name_node(sc->node, sc->nodename)) {
ng_rmnode(sc->node);
ng_unref(sc->node);
return (0);
}
sc->running = 0;
#endif /* NETGRAPH */
}
if(hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(hc->iobase);
return 1;
}
/*
* First figure out which SCA gave the interrupt.
* Process it.
* See if there is other interrupts pending.
* Repeat until there is no more interrupts.
*/
static void
arintr(int unit)
{
struct ar_hardc *hc;
hc = &ar_hardc[unit];
arintr_hc(hc);
return;
}
void
arintr_hc(struct ar_hardc *hc)
{
sca_regs *sca;
u_char isr0, isr1, isr2, arisr;
int scano;
/* XXX Use the PCI interrupt score board register later */
if(hc->bustype == AR_BUS_PCI)
arisr = hc->orbase[AR_ISTAT * 4];
else
arisr = inb(hc->iobase + AR_ISTAT);
while(arisr & AR_BD_INT) {
TRC(printf("arisr = %x\n", arisr));
if(arisr & AR_INT_0)
scano = 0;
else if(arisr & AR_INT_1)
scano = 1;
else {
/* XXX Oops this shouldn't happen. */
printf("arc%d: Interrupted with no interrupt.\n",
hc->cunit);
return;
}
sca = hc->sca[scano];
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
isr0 = sca->isr0;
isr1 = sca->isr1;
isr2 = sca->isr2;
TRC(printf("arc%d: ARINTR isr0 %x, isr1 %x, isr2 %x\n",
hc->cunit,
isr0,
isr1,
isr2));
if(isr0)
ar_msci_intr(hc, scano, isr0);
if(isr1)
ar_dmac_intr(hc, scano, isr1);
if(isr2)
ar_timer_intr(hc, scano, isr2);
/*
* Proccess the second sca's interrupt if available.
* Else see if there are any new interrupts.
*/
if((arisr & AR_INT_0) && (arisr & AR_INT_1))
arisr &= ~AR_INT_0;
else {
if(hc->bustype == AR_BUS_PCI)
arisr = hc->orbase[AR_ISTAT * 4];
else
arisr = inb(hc->iobase + AR_ISTAT);
}
}
if(hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(hc->iobase);
}
/*
* This will only start the transmitter. It is assumed that the data
* is already there. It is normally called from arstart() or ar_dmac_intr().
*
*/
static void
ar_xmit(struct ar_softc *sc)
{
#ifndef NETGRAPH
struct ifnet *ifp;
#endif /* NETGRAPH */
dmac_channel *dmac;
#ifndef NETGRAPH
ifp = &sc->ifsppp.pp_if;
#endif /* NETGRAPH */
dmac = &sc->sca->dmac[DMAC_TXCH(sc->scachan)];
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
dmac->cda = (u_short)(sc->block[sc->txb_next_tx].txdesc & 0xffff);
dmac->eda = (u_short)(sc->block[sc->txb_next_tx].txeda & 0xffff);
dmac->dsr = SCA_DSR_DE;
sc->xmit_busy = 1;
sc->txb_next_tx++;
if(sc->txb_next_tx == AR_TX_BLOCKS)
sc->txb_next_tx = 0;
#ifndef NETGRAPH
ifp->if_timer = 2; /* Value in seconds. */
#else /* NETGRAPH */
sc->out_dog = DOG_HOLDOFF; /* give ourself some breathing space*/
#endif /* NETGRAPH */
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(sc->hc->iobase);
}
/*
* This function will be called from the upper level when a user add a
* packet to be send, and from the interrupt handler after a finished
* transmit.
*
* NOTE: it should run at spl_imp().
*
* This function only place the data in the oncard buffers. It does not
* start the transmition. ar_xmit() does that.
*
* Transmitter idle state is indicated by the IFF_OACTIVE flag. The function
* that clears that should ensure that the transmitter and its DMA is
* in a "good" idle state.
*/
#ifndef NETGRAPH
static void
arstart(struct ifnet *ifp)
{
struct ar_softc *sc = ifp->if_softc;
#else /* NETGRAPH */
static void
arstart(struct ar_softc *sc)
{
#endif /* NETGRAPH */
int i, len, tlen;
struct mbuf *mtx;
u_char *txdata;
sca_descriptor *txdesc;
struct buf_block *blkp;
#ifndef NETGRAPH
if(!(ifp->if_flags & IFF_RUNNING))
return;
#else /* NETGRAPH */
/* XXX */
#endif /* NETGRAPH */
top_arstart:
/*
* See if we have space for more packets.
*/
if(sc->txb_inuse == AR_TX_BLOCKS) {
#ifndef NETGRAPH
ifp->if_flags |= IFF_OACTIVE; /* yes, mark active */
#else /* NETGRAPH */
/*XXX*/ /*ifp->if_flags |= IFF_OACTIVE;*/ /* yes, mark active */
#endif /* NETGRAPH */
return;
}
#ifndef NETGRAPH
mtx = sppp_dequeue(ifp);
#else /* NETGRAPH */
IF_DEQUEUE(&sc->xmitq_hipri, mtx);
if (mtx == NULL) {
IF_DEQUEUE(&sc->xmitq, mtx);
}
#endif /* NETGRAPH */
if(!mtx)
return;
/*
* It is OK to set the memory window outside the loop because
* all tx buffers and descriptors are assumed to be in the same
* 16K window.
*/
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, sc->block[0].txdesc);
/*
* We stay in this loop until there is nothing in the
* TX queue left or the tx buffer is full.
*/
i = 0;
blkp = &sc->block[sc->txb_new];
txdesc = (sca_descriptor *)
(sc->hc->mem_start + (blkp->txdesc & sc->hc->winmsk));
txdata = (u_char *)(sc->hc->mem_start + (blkp->txstart & sc->hc->winmsk));
for(;;) {
len = mtx->m_pkthdr.len;
TRC(printf("ar%d: ARstart len %u\n", sc->unit, len));
/*
* We can do this because the tx buffers don't wrap.
*/
m_copydata(mtx, 0, len, txdata);
tlen = len;
while(tlen > AR_BUF_SIZ) {
txdesc->stat = 0;
txdesc->len = AR_BUF_SIZ;
tlen -= AR_BUF_SIZ;
txdesc++;
txdata += AR_BUF_SIZ;
i++;
}
/* XXX Move into the loop? */
txdesc->stat = SCA_DESC_EOM;
txdesc->len = tlen;
txdesc++;
txdata += AR_BUF_SIZ;
i++;
#ifndef NETGRAPH
if(ifp->if_bpf)
bpf_mtap(ifp, mtx);
m_freem(mtx);
++sc->ifsppp.pp_if.if_opackets;
#else /* NETGRAPH */
m_freem(mtx);
sc->outbytes += len;
++sc->opackets;
#endif /* NETGRAPH */
/*
* Check if we have space for another mbuf.
* XXX This is hardcoded. A packet won't be larger
* than 3 buffers (3 x 512).
*/
if((i + 3) >= blkp->txmax)
break;
#ifndef NETGRAPH
mtx = sppp_dequeue(ifp);
#else /* NETGRAPH */
IF_DEQUEUE(&sc->xmitq_hipri, mtx);
if (mtx == NULL) {
IF_DEQUEUE(&sc->xmitq, mtx);
}
#endif /* NETGRAPH */
if(!mtx)
break;
}
blkp->txtail = i;
/*
* Mark the last descriptor, so that the SCA know where
* to stop.
*/
txdesc--;
txdesc->stat |= SCA_DESC_EOT;
txdesc = (sca_descriptor *)blkp->txdesc;
blkp->txeda = (u_short)((u_int)&txdesc[i]);
#if 0
printf("ARstart: %p desc->cp %x\n", &txdesc->cp, txdesc->cp);
printf("ARstart: %p desc->bp %x\n", &txdesc->bp, txdesc->bp);
printf("ARstart: %p desc->bpb %x\n", &txdesc->bpb, txdesc->bpb);
printf("ARstart: %p desc->len %x\n", &txdesc->len, txdesc->len);
printf("ARstart: %p desc->stat %x\n", &txdesc->stat, txdesc->stat);
#endif
sc->txb_inuse++;
sc->txb_new++;
if(sc->txb_new == AR_TX_BLOCKS)
sc->txb_new = 0;
if(sc->xmit_busy == 0)
ar_xmit(sc);
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(sc->hc->iobase);
goto top_arstart;
}
#ifndef NETGRAPH
static int
arioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
int s, error;
int was_up, should_be_up;
struct ar_softc *sc = ifp->if_softc;
TRC(printf("ar%d: arioctl.\n", ifp->if_unit);)
was_up = ifp->if_flags & IFF_RUNNING;
error = sppp_ioctl(ifp, cmd, data);
TRC(printf("ar%d: ioctl: ifsppp.pp_flags = %x, if_flags %x.\n",
ifp->if_unit, ((struct sppp *)ifp)->pp_flags, ifp->if_flags);)
if(error)
return error;
if((cmd != SIOCSIFFLAGS) && cmd != (SIOCSIFADDR))
return 0;
TRC(printf("ar%d: arioctl %s.\n", ifp->if_unit,
(cmd == SIOCSIFFLAGS) ? "SIOCSIFFLAGS" : "SIOCSIFADDR");)
s = splimp();
should_be_up = ifp->if_flags & IFF_RUNNING;
if(!was_up && should_be_up) {
/* Interface should be up -- start it. */
ar_up(sc);
arstart(ifp);
/* XXX Maybe clear the IFF_UP flag so that the link
* will only go up after sppp lcp and ipcp negotiation.
*/
} else if(was_up && !should_be_up) {
/* Interface should be down -- stop it. */
ar_down(sc);
sppp_flush(ifp);
}
splx(s);
return 0;
}
#endif /* NETGRAPH */
/*
* This is to catch lost tx interrupts.
*/
static void
#ifndef NETGRAPH
arwatchdog(struct ifnet *ifp)
{
struct ar_softc *sc = ifp->if_softc;
#else /* NETGRAPH */
arwatchdog(struct ar_softc *sc)
{
#endif /* NETGRAPH */
msci_channel *msci = &sc->sca->msci[sc->scachan];
#ifndef NETGRAPH
if(!(ifp->if_flags & IFF_RUNNING))
return;
#endif /* NETGRAPH */
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
/* XXX if(sc->ifsppp.pp_if.if_flags & IFF_DEBUG) */
printf("ar%d: transmit failed, "
"ST0 %x, ST1 %x, ST3 %x, DSR %x.\n",
sc->unit,
msci->st0,
msci->st1,
msci->st3,
sc->sca->dmac[DMAC_TXCH(sc->scachan)].dsr);
if(msci->st1 & SCA_ST1_UDRN) {
msci->cmd = SCA_CMD_TXABORT;
msci->cmd = SCA_CMD_TXENABLE;
msci->st1 = SCA_ST1_UDRN;
}
sc->xmit_busy = 0;
#ifndef NETGRAPH
ifp->if_flags &= ~IFF_OACTIVE;
#else /* NETGRAPH */
/* XXX ifp->if_flags &= ~IFF_OACTIVE; */
#endif /* NETGRAPH */
if(sc->txb_inuse && --sc->txb_inuse)
ar_xmit(sc);
#ifndef NETGRAPH
arstart(ifp);
#else /* NETGRAPH */
arstart(sc);
#endif /* NETGRAPH */
}
static void
ar_up(struct ar_softc *sc)
{
sca_regs *sca;
msci_channel *msci;
sca = sc->sca;
msci = &sca->msci[sc->scachan];
TRC(printf("ar%d: sca %p, msci %p, ch %d\n",
sc->unit, sca, msci, sc->scachan));
/*
* Enable transmitter and receiver.
* Raise DTR and RTS.
* Enable interrupts.
*/
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
/* XXX
* What about using AUTO mode in msci->md0 ???
* And what about CTS/DCD etc... ?
*/
if(sc->hc->handshake & AR_SHSK_RTS)
msci->ctl &= ~SCA_CTL_RTS;
if(sc->hc->handshake & AR_SHSK_DTR) {
sc->hc->txc_dtr[sc->scano] &= sc->scachan ?
~AR_TXC_DTR_DTR1 : ~AR_TXC_DTR_DTR0;
if(sc->hc->bustype == AR_BUS_PCI)
sc->hc->orbase[sc->hc->txc_dtr_off[sc->scano]] =
sc->hc->txc_dtr[sc->scano];
else
outb(sc->hc->iobase + sc->hc->txc_dtr_off[sc->scano],
sc->hc->txc_dtr[sc->scano]);
}
if(sc->scachan == 0) {
sca->ier0 |= 0x0F;
sca->ier1 |= 0x0F;
} else {
sca->ier0 |= 0xF0;
sca->ier1 |= 0xF0;
}
msci->cmd = SCA_CMD_RXENABLE;
if(sc->hc->bustype == AR_BUS_ISA)
inb(sc->hc->iobase + AR_ID_5); /* XXX slow it down a bit. */
msci->cmd = SCA_CMD_TXENABLE;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(sc->hc->iobase);
#ifdef NETGRAPH
untimeout(ngar_watchdog_frame, sc, sc->handle);
sc->handle = timeout(ngar_watchdog_frame, sc, hz);
sc->running = 1;
#endif /* NETGRAPH */
}
static void
ar_down(struct ar_softc *sc)
{
sca_regs *sca;
msci_channel *msci;
sca = sc->sca;
msci = &sca->msci[sc->scachan];
#ifdef NETGRAPH
untimeout(ngar_watchdog_frame, sc, sc->handle);
sc->running = 0;
#endif /* NETGRAPH */
/*
* Disable transmitter and receiver.
* Lower DTR and RTS.
* Disable interrupts.
*/
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
msci->cmd = SCA_CMD_RXDISABLE;
if(sc->hc->bustype == AR_BUS_ISA)
inb(sc->hc->iobase + AR_ID_5); /* XXX slow it down a bit. */
msci->cmd = SCA_CMD_TXDISABLE;
if(sc->hc->handshake & AR_SHSK_RTS)
msci->ctl |= SCA_CTL_RTS;
if(sc->hc->handshake & AR_SHSK_DTR) {
sc->hc->txc_dtr[sc->scano] |= sc->scachan ?
AR_TXC_DTR_DTR1 : AR_TXC_DTR_DTR0;
if(sc->hc->bustype == AR_BUS_PCI)
sc->hc->orbase[sc->hc->txc_dtr_off[sc->scano]] =
sc->hc->txc_dtr[sc->scano];
else
outb(sc->hc->iobase + sc->hc->txc_dtr_off[sc->scano],
sc->hc->txc_dtr[sc->scano]);
}
if(sc->scachan == 0) {
sca->ier0 &= ~0x0F;
sca->ier1 &= ~0x0F;
} else {
sca->ier0 &= ~0xF0;
sca->ier1 &= ~0xF0;
}
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(sc->hc->iobase);
}
static int
ar_read_pim_iface(volatile struct ar_hardc *hc, int channel)
{
int ctype, i, val, x;
volatile u_char *pimctrl;
ctype = 0;
val = 0;
pimctrl = hc->orbase + AR_PIMCTRL;
/* Reset the PIM */
*pimctrl = 0x00;
*pimctrl = AR_PIM_STROBE;
/* Check if there is a PIM */
*pimctrl = 0x00;
*pimctrl = AR_PIM_READ;
x = *pimctrl;
TRC(printf("x = %x", x));
if(x & AR_PIM_DATA) {
printf("No PIM installed\n");
return(AR_IFACE_UNKNOWN);
}
x = (x >> 1) & 0x01;
val |= x << 0;
/* Now read the next 15 bits */
for(i = 1; i < 16; i++) {
*pimctrl = AR_PIM_READ;
*pimctrl = AR_PIM_READ | AR_PIM_STROBE;
x = *pimctrl;
TRC(printf(" %x ", x));
x = (x >> 1) & 0x01;
val |= x << i;
if(i == 8 && (val & 0x000f) == 0x0004) {
int ii;
/* Start bit */
*pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE;
*pimctrl = AR_PIM_A2D_DOUT;
/* Mode bit */
*pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE;
*pimctrl = AR_PIM_A2D_DOUT;
/* Sign bit */
*pimctrl = AR_PIM_A2D_DOUT | AR_PIM_A2D_STROBE;
*pimctrl = AR_PIM_A2D_DOUT;
/* Select channel */
*pimctrl = AR_PIM_A2D_STROBE | ((channel & 2) << 2);
*pimctrl = ((channel & 2) << 2);
*pimctrl = AR_PIM_A2D_STROBE | ((channel & 1) << 3);
*pimctrl = ((channel & 1) << 3);
*pimctrl = AR_PIM_A2D_STROBE;
x = *pimctrl;
if(x & AR_PIM_DATA)
printf("\nOops A2D start bit not zero (%X)\n", x);
for(ii = 7; ii >= 0; ii--) {
*pimctrl = 0x00;
*pimctrl = AR_PIM_A2D_STROBE;
x = *pimctrl;
if(x & AR_PIM_DATA)
ctype |= 1 << ii;
}
}
}
TRC(printf("\nPIM val %x, ctype %x, %d\n", val, ctype, ctype));
*pimctrl = AR_PIM_MODEG;
*pimctrl = AR_PIM_MODEG | AR_PIM_AUTO_LED;
if(ctype > 255)
return(AR_IFACE_UNKNOWN);
if(ctype > 239)
return(AR_IFACE_V_35);
if(ctype > 207)
return(AR_IFACE_EIA_232);
if(ctype > 178)
return(AR_IFACE_X_21);
if(ctype > 150)
return(AR_IFACE_EIA_530);
if(ctype > 25)
return(AR_IFACE_UNKNOWN);
if(ctype > 7)
return(AR_IFACE_LOOPBACK);
return(AR_IFACE_UNKNOWN);
}
/*
* Initialize the card, allocate memory for the ar_softc structures
* and fill in the pointers.
*/
static void
arc_init(struct ar_hardc *hc)
{
struct ar_softc *sc;
int x;
u_int chanmem;
u_int bufmem;
u_int next;
u_int descneeded;
u_char isr, mar;
MALLOC(sc, struct ar_softc *, hc->numports * sizeof(struct ar_softc),
M_DEVBUF, M_WAITOK | M_ZERO);
if (sc == NULL)
return;
hc->sc = sc;
hc->txc_dtr[0] = AR_TXC_DTR_NOTRESET |
AR_TXC_DTR_DTR0 | AR_TXC_DTR_DTR1;
hc->txc_dtr[1] = AR_TXC_DTR_DTR0 | AR_TXC_DTR_DTR1;
hc->txc_dtr_off[0] = AR_TXC_DTR0;
hc->txc_dtr_off[1] = AR_TXC_DTR2;
if(hc->bustype == AR_BUS_PCI) {
hc->txc_dtr_off[0] *= 4;
hc->txc_dtr_off[1] *= 4;
}
/*
* reset the card and wait at least 1uS.
*/
if(hc->bustype == AR_BUS_PCI)
hc->orbase[AR_TXC_DTR0 * 4] = ~AR_TXC_DTR_NOTRESET &
hc->txc_dtr[0];
else
outb(hc->iobase + AR_TXC_DTR0, ~AR_TXC_DTR_NOTRESET &
hc->txc_dtr[0]);
DELAY(2);
if(hc->bustype == AR_BUS_PCI)
hc->orbase[AR_TXC_DTR0 * 4] = hc->txc_dtr[0];
else
outb(hc->iobase + AR_TXC_DTR0, hc->txc_dtr[0]);
if(hc->bustype == AR_BUS_ISA) {
/*
* Configure the card.
* Mem address, irq,
*/
mar = kvtop(hc->mem_start) >> 16;
isr = irqtable[ffs(hc->isa_irq) - 1] << 1;
if(isr == 0)
printf("ar%d: Warning illegal interrupt %d\n",
hc->cunit, ffs(hc->isa_irq) - 1);
isr = isr | ((kvtop(hc->mem_start) & 0xc000) >> 10);
hc->sca[0] = (sca_regs *)hc->mem_start;
hc->sca[1] = (sca_regs *)hc->mem_start;
outb(hc->iobase + AR_MEM_SEL, mar);
outb(hc->iobase + AR_INT_SEL, isr | AR_INTS_CEN);
}
if(hc->bustype == AR_BUS_PCI && hc->interface[0] == AR_IFACE_PIM)
for(x = 0; x < hc->numports; x++)
hc->interface[x] = ar_read_pim_iface(hc, x);
/*
* Set the TX clock direction and enable TX.
*/
for(x=0;x<hc->numports;x++) {
switch(hc->interface[x]) {
case AR_IFACE_V_35:
hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ?
AR_TXC_DTR_TX0 : AR_TXC_DTR_TX1;
hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ?
AR_TXC_DTR_TXCS0 : AR_TXC_DTR_TXCS1;
break;
case AR_IFACE_EIA_530:
case AR_IFACE_COMBO:
case AR_IFACE_X_21:
hc->txc_dtr[x / NCHAN] |= (x % NCHAN == 0) ?
AR_TXC_DTR_TX0 : AR_TXC_DTR_TX1;
break;
}
}
if(hc->bustype == AR_BUS_PCI)
hc->orbase[AR_TXC_DTR0 * 4] = hc->txc_dtr[0];
else
outb(hc->iobase + AR_TXC_DTR0, hc->txc_dtr[0]);
if(hc->numports > NCHAN) {
if(hc->bustype == AR_BUS_PCI)
hc->orbase[AR_TXC_DTR2 * 4] = hc->txc_dtr[1];
else
outb(hc->iobase + AR_TXC_DTR2, hc->txc_dtr[1]);
}
chanmem = hc->memsize / hc->numports;
next = 0;
for(x=0;x<hc->numports;x++, sc++) {
int blk;
sc->sca = hc->sca[x / NCHAN];
for(blk = 0; blk < AR_TX_BLOCKS; blk++) {
sc->block[blk].txdesc = next;
bufmem = (16 * 1024) / AR_TX_BLOCKS;
descneeded = bufmem / AR_BUF_SIZ;
sc->block[blk].txstart = sc->block[blk].txdesc +
((((descneeded * sizeof(sca_descriptor)) /
AR_BUF_SIZ) + 1) * AR_BUF_SIZ);
sc->block[blk].txend = next + bufmem;
sc->block[blk].txmax =
(sc->block[blk].txend - sc->block[blk].txstart)
/ AR_BUF_SIZ;
next += bufmem;
TRC(printf("ar%d: blk %d: txdesc %x, txstart %x, "
"txend %x, txmax %d\n",
x,
blk,
sc->block[blk].txdesc,
sc->block[blk].txstart,
sc->block[blk].txend,
sc->block[blk].txmax));
}
sc->rxdesc = next;
bufmem = chanmem - (bufmem * AR_TX_BLOCKS);
descneeded = bufmem / AR_BUF_SIZ;
sc->rxstart = sc->rxdesc +
((((descneeded * sizeof(sca_descriptor)) /
AR_BUF_SIZ) + 1) * AR_BUF_SIZ);
sc->rxend = next + bufmem;
sc->rxmax = (sc->rxend - sc->rxstart) / AR_BUF_SIZ;
next += bufmem;
TRC(printf("ar%d: rxdesc %x, rxstart %x, "
"rxend %x, rxmax %d\n",
x, sc->rxdesc, sc->rxstart, sc->rxend, sc->rxmax));
}
if(hc->bustype == AR_BUS_PCI)
hc->orbase[AR_PIMCTRL] = AR_PIM_MODEG | AR_PIM_AUTO_LED;
}
/*
* The things done here are channel independent.
*
* Configure the sca waitstates.
* Configure the global interrupt registers.
* Enable master dma enable.
*/
static void
ar_init_sca(struct ar_hardc *hc, int scano)
{
sca_regs *sca;
sca = hc->sca[scano];
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
/*
* Do the wait registers.
* Set everything to 0 wait states.
*/
sca->pabr0 = 0;
sca->pabr1 = 0;
sca->wcrl = 0;
sca->wcrm = 0;
sca->wcrh = 0;
/*
* Configure the interrupt registers.
* Most are cleared until the interface is configured.
*/
sca->ier0 = 0x00; /* MSCI interrupts... Not used with dma. */
sca->ier1 = 0x00; /* DMAC interrupts */
sca->ier2 = 0x00; /* TIMER interrupts... Not used yet. */
sca->itcr = 0x00; /* Use ivr and no intr ack */
sca->ivr = 0x40; /* Fill in the interrupt vector. */
sca->imvr = 0x40;
/*
* Configure the timers.
* XXX Later
*/
/*
* Set the DMA channel priority to rotate between
* all four channels.
*
* Enable all dma channels.
*/
if(hc->bustype == AR_BUS_PCI) {
u_char *t;
/*
* Stupid problem with the PCI interface chip that break
* things.
* XXX
*/
t = (u_char *)sca;
t[AR_PCI_SCA_PCR] = SCA_PCR_PR2;
t[AR_PCI_SCA_DMER] = SCA_DMER_EN;
} else {
sca->pcr = SCA_PCR_PR2;
sca->dmer = SCA_DMER_EN;
}
}
/*
* Configure the msci
*
* NOTE: The serial port configuration is hardcoded at the moment.
*/
static void
ar_init_msci(struct ar_softc *sc)
{
msci_channel *msci;
msci = &sc->sca->msci[sc->scachan];
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
msci->cmd = SCA_CMD_RESET;
msci->md0 = SCA_MD0_CRC_1 |
SCA_MD0_CRC_CCITT |
SCA_MD0_CRC_ENABLE |
SCA_MD0_MODE_HDLC;
msci->md1 = SCA_MD1_NOADDRCHK;
msci->md2 = SCA_MD2_DUPLEX | SCA_MD2_NRZ;
/*
* Acording to the manual I should give a reset after changing the
* mode registers.
*/
msci->cmd = SCA_CMD_RXRESET;
msci->ctl = SCA_CTL_IDLPAT | SCA_CTL_UDRNC | SCA_CTL_RTS;
/*
* For now all interfaces are programmed to use the RX clock for
* the TX clock.
*/
switch(sc->hc->interface[sc->subunit]) {
case AR_IFACE_V_35:
msci->rxs = SCA_RXS_CLK_RXC0 | SCA_RXS_DIV1;
msci->txs = SCA_TXS_CLK_TXC | SCA_TXS_DIV1;
break;
case AR_IFACE_X_21:
case AR_IFACE_EIA_530:
case AR_IFACE_COMBO:
msci->rxs = SCA_RXS_CLK_RXC0 | SCA_RXS_DIV1;
msci->txs = SCA_TXS_CLK_RX | SCA_TXS_DIV1;
}
msci->tmc = 153; /* This give 64k for loopback */
/* XXX
* Disable all interrupts for now. I think if you are using
* the dmac you don't use these interrupts.
*/
msci->ie0 = 0;
msci->ie1 = 0x0C; /* XXX CTS and DCD (DSR on 570I) level change. */
msci->ie2 = 0;
msci->fie = 0;
msci->sa0 = 0;
msci->sa1 = 0;
msci->idl = 0x7E; /* XXX This is what cisco does. */
/*
* This is what the ARNET diags use.
*/
msci->rrc = 0x0E;
msci->trc0 = 0x12;
msci->trc1 = 0x1F;
}
/*
* Configure the rx dma controller.
*/
static void
ar_init_rx_dmac(struct ar_softc *sc)
{
dmac_channel *dmac;
sca_descriptor *rxd;
u_int rxbuf;
u_int rxda;
u_int rxda_d;
int x = 0;
dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)];
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, sc->rxdesc);
rxd = (sca_descriptor *)(sc->hc->mem_start + (sc->rxdesc&sc->hc->winmsk));
rxda_d = (u_int)sc->hc->mem_start - (sc->rxdesc & ~sc->hc->winmsk);
for(rxbuf=sc->rxstart;rxbuf<sc->rxend;rxbuf += AR_BUF_SIZ, rxd++) {
rxda = (u_int)&rxd[1] - rxda_d;
rxd->cp = (u_short)(rxda & 0xfffful);
x++;
if(x < 6)
TRC(printf("Descrp %p, data pt %x, data %x, ",
rxd, rxda, rxbuf));
rxd->bp = (u_short)(rxbuf & 0xfffful);
rxd->bpb = (u_char)((rxbuf >> 16) & 0xff);
rxd->len = 0;
rxd->stat = 0xff; /* The sca write here when it is finished. */
if(x < 6)
TRC(printf("bpb %x, bp %x.\n", rxd->bpb, rxd->bp));
}
rxd--;
rxd->cp = (u_short)(sc->rxdesc & 0xfffful);
sc->rxhind = 0;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
dmac->dsr = 0; /* Disable DMA transfer */
dmac->dcr = SCA_DCR_ABRT;
/* XXX maybe also SCA_DMR_CNTE */
dmac->dmr = SCA_DMR_TMOD | SCA_DMR_NF;
dmac->bfl = AR_BUF_SIZ;
dmac->cda = (u_short)(sc->rxdesc & 0xffff);
dmac->sarb = (u_char)((sc->rxdesc >> 16) & 0xff);
rxd = (sca_descriptor *)sc->rxstart;
dmac->eda = (u_short)((u_int)&rxd[sc->rxmax - 1] & 0xffff);
dmac->dir = 0xF0;
dmac->dsr = SCA_DSR_DE;
}
/*
* Configure the TX DMA descriptors.
* Initialize the needed values and chain the descriptors.
*/
static void
ar_init_tx_dmac(struct ar_softc *sc)
{
dmac_channel *dmac;
struct buf_block *blkp;
int blk;
sca_descriptor *txd;
u_int txbuf;
u_int txda;
u_int txda_d;
dmac = &sc->sca->dmac[DMAC_TXCH(sc->scachan)];
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, sc->block[0].txdesc);
for(blk = 0; blk < AR_TX_BLOCKS; blk++) {
blkp = &sc->block[blk];
txd = (sca_descriptor *)(sc->hc->mem_start +
(blkp->txdesc&sc->hc->winmsk));
txda_d = (u_int)sc->hc->mem_start -
(blkp->txdesc & ~sc->hc->winmsk);
txbuf=blkp->txstart;
for(;txbuf<blkp->txend;txbuf += AR_BUF_SIZ, txd++) {
txda = (u_int)&txd[1] - txda_d;
txd->cp = (u_short)(txda & 0xfffful);
txd->bp = (u_short)(txbuf & 0xfffful);
txd->bpb = (u_char)((txbuf >> 16) & 0xff);
TRC(printf("ar%d: txbuf %x, bpb %x, bp %x\n",
sc->unit, txbuf, txd->bpb, txd->bp));
txd->len = 0;
txd->stat = 0;
}
txd--;
txd->cp = (u_short)(blkp->txdesc & 0xfffful);
blkp->txtail = (u_int)txd - (u_int)sc->hc->mem_start;
TRC(printf("TX Descriptors start %x, end %x.\n",
blkp->txdesc,
blkp->txtail));
}
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
dmac->dsr = 0; /* Disable DMA */
dmac->dcr = SCA_DCR_ABRT;
dmac->dmr = SCA_DMR_TMOD | SCA_DMR_NF;
dmac->dir = SCA_DIR_EOT | SCA_DIR_BOF | SCA_DIR_COF;
dmac->sarb = (u_char)((sc->block[0].txdesc >> 16) & 0xff);
}
/*
* Look through the descriptors to see if there is a complete packet
* available. Stop if we get to where the sca is busy.
*
* Return the length and status of the packet.
* Return nonzero if there is a packet available.
*
* NOTE:
* It seems that we get the interrupt a bit early. The updateing of
* descriptor values is not always completed when this is called.
*/
static int
ar_packet_avail(struct ar_softc *sc,
int *len,
u_char *rxstat)
{
dmac_channel *dmac;
sca_descriptor *rxdesc;
sca_descriptor *endp;
sca_descriptor *cda;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)];
cda = (sca_descriptor *)(sc->hc->mem_start +
((((u_int)dmac->sarb << 16) + dmac->cda) & sc->hc->winmsk));
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, sc->rxdesc);
rxdesc = (sca_descriptor *)
(sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
endp = rxdesc;
rxdesc = &rxdesc[sc->rxhind];
endp = &endp[sc->rxmax];
*len = 0;
while(rxdesc != cda) {
*len += rxdesc->len;
if(rxdesc->stat & SCA_DESC_EOM) {
*rxstat = rxdesc->stat;
TRC(printf("ar%d: PKT AVAIL len %d, %x.\n",
sc->unit, *len, *rxstat));
return 1;
}
rxdesc++;
if(rxdesc == endp)
rxdesc = (sca_descriptor *)
(sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
}
*len = 0;
*rxstat = 0;
return 0;
}
/*
* Copy a packet from the on card memory into a provided mbuf.
* Take into account that buffers wrap and that a packet may
* be larger than a buffer.
*/
static void
ar_copy_rxbuf(struct mbuf *m,
struct ar_softc *sc,
int len)
{
sca_descriptor *rxdesc;
u_int rxdata;
u_int rxmax;
u_int off = 0;
u_int tlen;
rxdata = sc->rxstart + (sc->rxhind * AR_BUF_SIZ);
rxmax = sc->rxstart + (sc->rxmax * AR_BUF_SIZ);
rxdesc = (sca_descriptor *)
(sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
rxdesc = &rxdesc[sc->rxhind];
while(len) {
tlen = (len < AR_BUF_SIZ) ? len : AR_BUF_SIZ;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, rxdata);
bcopy(sc->hc->mem_start + (rxdata & sc->hc->winmsk),
mtod(m, caddr_t) + off,
tlen);
off += tlen;
len -= tlen;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, sc->rxdesc);
rxdesc->len = 0;
rxdesc->stat = 0xff;
rxdata += AR_BUF_SIZ;
rxdesc++;
if(rxdata == rxmax) {
rxdata = sc->rxstart;
rxdesc = (sca_descriptor *)
(sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
}
}
}
/*
* If single is set, just eat a packet. Otherwise eat everything up to
* where cda points. Update pointers to point to the next packet.
*/
static void
ar_eat_packet(struct ar_softc *sc, int single)
{
dmac_channel *dmac;
sca_descriptor *rxdesc;
sca_descriptor *endp;
sca_descriptor *cda;
int loopcnt = 0;
u_char stat;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
dmac = &sc->sca->dmac[DMAC_RXCH(sc->scachan)];
cda = (sca_descriptor *)(sc->hc->mem_start +
((((u_int)dmac->sarb << 16) + dmac->cda) & sc->hc->winmsk));
/*
* Loop until desc->stat == (0xff || EOM)
* Clear the status and length in the descriptor.
* Increment the descriptor.
*/
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase, sc->rxdesc);
rxdesc = (sca_descriptor *)
(sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
endp = rxdesc;
rxdesc = &rxdesc[sc->rxhind];
endp = &endp[sc->rxmax];
while(rxdesc != cda) {
loopcnt++;
if(loopcnt > sc->rxmax) {
printf("ar%d: eat pkt %d loop, cda %p, "
"rxdesc %p, stat %x.\n",
sc->unit,
loopcnt,
(void *)cda,
(void *)rxdesc,
rxdesc->stat);
break;
}
stat = rxdesc->stat;
rxdesc->len = 0;
rxdesc->stat = 0xff;
rxdesc++;
sc->rxhind++;
if(rxdesc == endp) {
rxdesc = (sca_descriptor *)
(sc->hc->mem_start + (sc->rxdesc & sc->hc->winmsk));
sc->rxhind = 0;
}
if(single && (stat == SCA_DESC_EOM))
break;
}
/*
* Update the eda to the previous descriptor.
*/
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
rxdesc = (sca_descriptor *)sc->rxdesc;
rxdesc = &rxdesc[(sc->rxhind + sc->rxmax - 2 ) % sc->rxmax];
sc->sca->dmac[DMAC_RXCH(sc->scachan)].eda =
(u_short)((u_int)rxdesc & 0xffff);
}
/*
* While there is packets available in the rx buffer, read them out
* into mbufs and ship them off.
*/
static void
ar_get_packets(struct ar_softc *sc)
{
sca_descriptor *rxdesc;
struct mbuf *m = NULL;
int i;
int len;
u_char rxstat;
#ifdef NETGRAPH
int error;
#endif
while(ar_packet_avail(sc, &len, &rxstat)) {
TRC(printf("apa: len %d, rxstat %x\n", len, rxstat));
if(((rxstat & SCA_DESC_ERRORS) == 0) && (len < MCLBYTES)) {
MGETHDR(m, M_DONTWAIT, MT_DATA);
if(m == NULL) {
/* eat packet if get mbuf fail!! */
ar_eat_packet(sc, 1);
continue;
}
#ifndef NETGRAPH
m->m_pkthdr.rcvif = &sc->ifsppp.pp_if;
#else /* NETGRAPH */
m->m_pkthdr.rcvif = NULL;
sc->inbytes += len;
sc->inlast = 0;
#endif /* NETGRAPH */
m->m_pkthdr.len = m->m_len = len;
if(len > MHLEN) {
MCLGET(m, M_DONTWAIT);
if((m->m_flags & M_EXT) == 0) {
m_freem(m);
ar_eat_packet(sc, 1);
continue;
}
}
ar_copy_rxbuf(m, sc, len);
#ifndef NETGRAPH
if(sc->ifsppp.pp_if.if_bpf)
bpf_mtap(&sc->ifsppp.pp_if, m);
sppp_input(&sc->ifsppp.pp_if, m);
sc->ifsppp.pp_if.if_ipackets++;
#else /* NETGRAPH */
NG_SEND_DATA_ONLY(error, sc->hook, m);
sc->ipackets++;
#endif /* NETGRAPH */
/*
* Update the eda to the previous descriptor.
*/
i = (len + AR_BUF_SIZ - 1) / AR_BUF_SIZ;
sc->rxhind = (sc->rxhind + i) % sc->rxmax;
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
rxdesc = (sca_descriptor *)sc->rxdesc;
rxdesc =
&rxdesc[(sc->rxhind + sc->rxmax - 2 ) % sc->rxmax];
sc->sca->dmac[DMAC_RXCH(sc->scachan)].eda =
(u_short)((u_int)rxdesc & 0xffff);
} else {
int tries = 5;
while((rxstat == 0xff) && --tries)
ar_packet_avail(sc, &len, &rxstat);
/*
* It look like we get an interrupt early
* sometimes and then the status is not
* filled in yet.
*/
if(tries && (tries != 5))
continue;
ar_eat_packet(sc, 1);
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_ierrors++;
#else /* NETGRAPH */
sc->ierrors[0]++;
#endif /* NETGRAPH */
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(sc->hc->iobase, sc->scano);
TRCL(printf("ar%d: Receive error chan %d, "
"stat %x, msci st3 %x,"
"rxhind %d, cda %x, eda %x.\n",
sc->unit,
sc->scachan,
rxstat,
sc->sca->msci[sc->scachan].st3,
sc->rxhind,
sc->sca->dmac[
DMAC_RXCH(sc->scachan)].cda,
sc->sca->dmac[
DMAC_RXCH(sc->scachan)].eda));
}
}
}
/*
* All DMA interrupts come here.
*
* Each channel has two interrupts.
* Interrupt A for errors and Interrupt B for normal stuff like end
* of transmit or receive dmas.
*/
static void
ar_dmac_intr(struct ar_hardc *hc, int scano, u_char isr1)
{
u_char dsr;
u_char dotxstart = isr1;
int mch;
struct ar_softc *sc;
sca_regs *sca;
dmac_channel *dmac;
sca = hc->sca[scano];
mch = 0;
/*
* Shortcut if there is no interrupts for dma channel 0 or 1
*/
if((isr1 & 0x0F) == 0) {
mch = 1;
isr1 >>= 4;
}
do {
sc = &hc->sc[mch + (NCHAN * scano)];
/*
* Transmit channel
*/
if(isr1 & 0x0C) {
dmac = &sca->dmac[DMAC_TXCH(mch)];
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
dsr = dmac->dsr;
dmac->dsr = dsr;
/* Counter overflow */
if(dsr & SCA_DSR_COF) {
printf("ar%d: TX DMA Counter overflow, "
"txpacket no %lu.\n",
sc->unit,
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_opackets);
sc->ifsppp.pp_if.if_oerrors++;
#else /* NETGRAPH */
sc->opackets);
sc->oerrors++;
#endif /* NETGRAPH */
}
/* Buffer overflow */
if(dsr & SCA_DSR_BOF) {
printf("ar%d: TX DMA Buffer overflow, "
"txpacket no %lu, dsr %02x, "
"cda %04x, eda %04x.\n",
sc->unit,
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_opackets,
#else /* NETGRAPH */
sc->opackets,
#endif /* NETGRAPH */
dsr,
dmac->cda,
dmac->eda);
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_oerrors++;
#else /* NETGRAPH */
sc->oerrors++;
#endif /* NETGRAPH */
}
/* End of Transfer */
if(dsr & SCA_DSR_EOT) {
/*
* This should be the most common case.
*
* Clear the IFF_OACTIVE flag.
*
* Call arstart to start a new transmit if
* there is data to transmit.
*/
sc->xmit_busy = 0;
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_flags &= ~IFF_OACTIVE;
sc->ifsppp.pp_if.if_timer = 0;
#else /* NETGRAPH */
/* XXX c->ifsppp.pp_if.if_flags &= ~IFF_OACTIVE; */
sc->out_dog = 0; /* XXX */
#endif /* NETGRAPH */
if(sc->txb_inuse && --sc->txb_inuse)
ar_xmit(sc);
}
}
/*
* Receive channel
*/
if(isr1 & 0x03) {
dmac = &sca->dmac[DMAC_RXCH(mch)];
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
dsr = dmac->dsr;
dmac->dsr = dsr;
TRC(printf("AR: RX DSR %x\n", dsr));
/* End of frame */
if(dsr & SCA_DSR_EOM) {
TRC(int tt = sc->ifsppp.pp_if.if_ipackets;)
TRC(int ind = sc->rxhind;)
ar_get_packets(sc);
TRC(
#ifndef NETGRAPH
if(tt == sc->ifsppp.pp_if.if_ipackets) {
#else /* NETGRAPH */
if(tt == sc->ipackets) {
#endif /* NETGRAPH */
sca_descriptor *rxdesc;
int i;
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
printf("AR: RXINTR isr1 %x, dsr %x, "
"no data %d pkts, orxhind %d.\n",
dotxstart,
dsr,
tt,
ind);
printf("AR: rxdesc %x, rxstart %x, "
"rxend %x, rxhind %d, "
"rxmax %d.\n",
sc->rxdesc,
sc->rxstart,
sc->rxend,
sc->rxhind,
sc->rxmax);
printf("AR: cda %x, eda %x.\n",
dmac->cda,
dmac->eda);
if(sc->hc->bustype == AR_BUS_ISA)
ARC_SET_MEM(sc->hc->iobase,
sc->rxdesc);
rxdesc = (sca_descriptor *)
(sc->hc->mem_start +
(sc->rxdesc & sc->hc->winmsk));
rxdesc = &rxdesc[sc->rxhind];
for(i=0;i<3;i++,rxdesc++)
printf("AR: rxdesc->stat %x, "
"len %d.\n",
rxdesc->stat,
rxdesc->len);
})
}
/* Counter overflow */
if(dsr & SCA_DSR_COF) {
printf("ar%d: RX DMA Counter overflow, "
"rxpkts %lu.\n",
sc->unit,
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_ipackets);
sc->ifsppp.pp_if.if_ierrors++;
#else /* NETGRAPH */
sc->ipackets);
sc->ierrors[1]++;
#endif /* NETGRAPH */
}
/* Buffer overflow */
if(dsr & SCA_DSR_BOF) {
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
printf("ar%d: RX DMA Buffer overflow, "
"rxpkts %lu, rxind %d, "
"cda %x, eda %x, dsr %x.\n",
sc->unit,
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_ipackets,
#else /* NETGRAPH */
sc->ipackets,
#endif /* NETGRAPH */
sc->rxhind,
dmac->cda,
dmac->eda,
dsr);
/*
* Make sure we eat as many as possible.
* Then get the system running again.
*/
ar_eat_packet(sc, 0);
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_ierrors++;
#else /* NETGRAPH */
sc->ierrors[2]++;
#endif /* NETGRAPH */
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc->iobase, scano);
sca->msci[mch].cmd = SCA_CMD_RXMSGREJ;
dmac->dsr = SCA_DSR_DE;
TRC(printf("ar%d: RX DMA Buffer overflow, "
"rxpkts %lu, rxind %d, "
"cda %x, eda %x, dsr %x. After\n",
sc->unit,
sc->ifsppp.pp_if.if_ipackets,
sc->rxhind,
dmac->cda,
dmac->eda,
dmac->dsr);)
}
/* End of Transfer */
if(dsr & SCA_DSR_EOT) {
/*
* If this happen, it means that we are
* receiving faster than what the processor
* can handle.
*
* XXX We should enable the dma again.
*/
printf("ar%d: RX End of transfer, rxpkts %lu.\n",
sc->unit,
#ifndef NETGRAPH
sc->ifsppp.pp_if.if_ipackets);
sc->ifsppp.pp_if.if_ierrors++;
#else /* NETGRAPH */
sc->ipackets);
sc->ierrors[3]++;
#endif /* NETGRAPH */
}
}
isr1 >>= 4;
mch++;
}while((mch<NCHAN) && isr1);
/*
* Now that we have done all the urgent things, see if we
* can fill the transmit buffers.
*/
for(mch = 0; mch < NCHAN; mch++) {
if(dotxstart & 0x0C) {
sc = &hc->sc[mch + (NCHAN * scano)];
#ifndef NETGRAPH
arstart(&sc->ifsppp.pp_if);
#else /* NETGRAPH */
arstart(sc);
#endif /* NETGRAPH */
}
dotxstart >>= 4;
}
}
static void
ar_msci_intr(struct ar_hardc *hc, int scano, u_char isr0)
{
printf("arc%d: ARINTR: MSCI\n", hc->cunit);
}
static void
ar_timer_intr(struct ar_hardc *hc, int scano, u_char isr2)
{
printf("arc%d: ARINTR: TIMER\n", hc->cunit);
}
#ifdef NETGRAPH
/*****************************************
* Device timeout/watchdog routine.
* called once per second.
* checks to see that if activity was expected, that it hapenned.
* At present we only look to see if expected output was completed.
*/
static void
ngar_watchdog_frame(void * arg)
{
struct ar_softc * sc = arg;
int s;
int speed;
if(sc->running == 0)
return; /* if we are not running let timeouts die */
/*
* calculate the apparent throughputs
* XXX a real hack
*/
s = splimp();
speed = sc->inbytes - sc->lastinbytes;
sc->lastinbytes = sc->inbytes;
if ( sc->inrate < speed )
sc->inrate = speed;
speed = sc->outbytes - sc->lastoutbytes;
sc->lastoutbytes = sc->outbytes;
if ( sc->outrate < speed )
sc->outrate = speed;
sc->inlast++;
splx(s);
if ((sc->inlast > QUITE_A_WHILE)
&& (sc->out_deficit > LOTS_OF_PACKETS)) {
log(LOG_ERR, "ar%d: No response from remote end\n", sc->unit);
s = splimp();
ar_down(sc);
ar_up(sc);
sc->inlast = sc->out_deficit = 0;
splx(s);
} else if ( sc->xmit_busy ) { /* no TX -> no TX timeouts */
if (sc->out_dog == 0) {
log(LOG_ERR, "ar%d: Transmit failure.. no clock?\n",
sc->unit);
s = splimp();
arwatchdog(sc);
#if 0
ar_down(sc);
ar_up(sc);
#endif
splx(s);
sc->inlast = sc->out_deficit = 0;
} else {
sc->out_dog--;
}
}
sc->handle = timeout(ngar_watchdog_frame, sc, hz);
}
/***********************************************************************
* This section contains the methods for the Netgraph interface
***********************************************************************/
/*
* It is not possible or allowable to create a node of this type.
* If the hardware exists, it will already have created it.
*/
static int
ngar_constructor(node_p *nodep)
{
return (EINVAL);
}
/*
* give our ok for a hook to be added...
* If we are not running this should kick the device into life.
* The hook's private info points to our stash of info about that
* channel.
*/
static int
ngar_newhook(node_p node, hook_p hook, const char *name)
{
struct ar_softc * sc = node->private;
/*
* check if it's our friend the debug hook
*/
if (strcmp(name, NG_AR_HOOK_DEBUG) == 0) {
hook->private = NULL; /* paranoid */
sc->debug_hook = hook;
return (0);
}
/*
* Check for raw mode hook.
*/
if (strcmp(name, NG_AR_HOOK_RAW) != 0) {
return (EINVAL);
}
hook->private = sc;
sc->hook = hook;
sc->datahooks++;
ar_up(sc);
return (0);
}
/*
* incoming messages.
* Just respond to the generic TEXT_STATUS message
*/
static int
ngar_rcvmsg(node_p node, struct ng_mesg *msg, const char *retaddr,
struct ng_mesg **rptr, hook_p lasthook)
{
struct ar_softc * sc;
struct ng_mesg *resp = NULL;
int error = 0;
sc = node->private;
switch (msg->header.typecookie) {
case NG_AR_COOKIE:
error = EINVAL;
break;
case NGM_GENERIC_COOKIE:
switch(msg->header.cmd) {
case NGM_TEXT_STATUS: {
char *arg;
int pos = 0;
int resplen = sizeof(struct ng_mesg) + 512;
NG_MKRESPONSE(resp, msg, resplen, M_NOWAIT);
if (resp == NULL) {
error = ENOMEM;
break;
}
arg = (resp)->data;
pos = sprintf(arg, "%ld bytes in, %ld bytes out\n"
"highest rate seen: %ld B/S in, %ld B/S out\n",
sc->inbytes, sc->outbytes,
sc->inrate, sc->outrate);
pos += sprintf(arg + pos,
"%ld output errors\n",
sc->oerrors);
pos += sprintf(arg + pos,
"ierrors = %ld, %ld, %ld, %ld\n",
sc->ierrors[0],
sc->ierrors[1],
sc->ierrors[2],
sc->ierrors[3]);
resp->header.arglen = pos + 1;
break;
}
default:
error = EINVAL;
break;
}
break;
default:
error = EINVAL;
break;
}
/* Take care of synchronous response, if any */
if (rptr)
*rptr = resp;
else if (resp)
/* Should send the hard way */
FREE(resp, M_NETGRAPH);
free(msg, M_NETGRAPH);
return (error);
}
/*
* get data from another node and transmit it to the correct channel
*/
static int
ngar_rcvdata(hook_p hook, struct mbuf *m, meta_p meta,
struct mbuf **ret_m, meta_p *ret_meta, struct ng_mesg **resp)
{
int s;
int error = 0;
struct ar_softc * sc = hook->node->private;
struct ifqueue *xmitq_p;
/*
* data doesn't come in from just anywhere (e.g control hook)
*/
if ( hook->private == NULL) {
error = ENETDOWN;
goto bad;
}
/*
* Now queue the data for when it can be sent
*/
if (meta && meta->priority > 0) {
xmitq_p = (&sc->xmitq_hipri);
} else {
xmitq_p = (&sc->xmitq);
}
s = splimp();
IF_LOCK(xmitq_p);
if (_IF_QFULL(xmitq_p)) {
_IF_DROP(xmitq_p);
IF_UNLOCK(xmitq_p);
splx(s);
error = ENOBUFS;
goto bad;
}
_IF_ENQUEUE(xmitq_p, m);
IF_UNLOCK(xmitq_p);
arstart(sc);
splx(s);
return (0);
bad:
/*
* It was an error case.
* check if we need to free the mbuf, and then return the error
*/
NG_FREE_DATA(m, meta);
return (error);
}
/*
* do local shutdown processing..
* this node will refuse to go away, unless the hardware says to..
* don't unref the node, or remove our name. just clear our links up.
*/
static int
ngar_rmnode(node_p node)
{
struct ar_softc * sc = node->private;
ar_down(sc);
ng_cutlinks(node);
node->flags &= ~NG_INVALID; /* bounce back to life */
return (0);
}
/* already linked */
static int
ngar_connect(hook_p hook)
{
/* probably not at splnet, force outward queueing */
hook->peer->flags |= HK_QUEUE;
/* be really amiable and just say "YUP that's OK by me! " */
return (0);
}
/*
* notify on hook disconnection (destruction)
*
* Invalidate the private data associated with this dlci.
* For this type, removal of the last link resets tries to destroy the node.
* As the device still exists, the shutdown method will not actually
* destroy the node, but reset the device and leave it 'fresh' :)
*
* The node removal code will remove all references except that owned by the
* driver.
*/
static int
ngar_disconnect(hook_p hook)
{
struct ar_softc * sc = hook->node->private;
int s;
/*
* If it's the data hook, then free resources etc.
*/
if (hook->private) {
s = splimp();
sc->datahooks--;
if (sc->datahooks == 0)
ar_down(sc);
splx(s);
} else {
sc->debug_hook = NULL;
}
return (0);
}
/*
* called during bootup
* or LKM loading to put this type into the list of known modules
*/
static void
ngar_init(void *ignored)
{
if (ng_newtype(&typestruct))
printf("ngar install failed\n");
ngar_done_init = 1;
}
#endif /* NETGRAPH */
/*
********************************* END ************************************
*/
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