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freebsd-nq/sys/dev/ar/if_ar.c
David E. O'Brien aad970f1fe Use __FBSDID(). 
Also some minor style cleanups.
2003-08-24 17:55:58 +00:00

2367 lines
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/*
* Copyright (c) 1995 - 2001 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <sys/rman.h>
#include <net/if.h>
#ifdef NETGRAPH
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <sys/syslog.h>
#include <dev/ar/if_ar.h>
#else /* NETGRAPH */
#include <net/if_sppp.h>
#include <net/bpf.h>
#endif /* NETGRAPH */
#include <machine/md_var.h>
#include <dev/ic/hd64570.h>
#include <dev/ar/if_arregs.h>
#ifdef TRACE
#define TRC(x) x
#else
#define TRC(x)
#endif
#define TRCL(x) x
#define PPP_HEADER_LEN 4
devclass_t ar_devclass;
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 */
};
static int next_ar_unit = 0;
#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 */
/*
* 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 */
};
#ifndef NETGRAPH
MODULE_DEPEND(if_ar, sppp, 1, 1, 1);
#else
MODULE_DEPEND(ng_sync_ar, netgraph, 1, 1, 1);
#endif
static void arintr(void *arg);
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_shutdown;
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_shutdown,
ngar_newhook,
NULL,
ngar_connect,
ngar_rcvdata,
ngar_disconnect,
NULL
};
static int ngar_done_init = 0;
#endif /* NETGRAPH */
int
ar_attach(device_t device)
{
struct ar_hardc *hc;
struct ar_softc *sc;
#ifndef NETGRAPH
struct ifnet *ifp;
char *iface;
#endif /* NETGRAPH */
int unit;
hc = (struct ar_hardc *)device_get_softc(device);
printf("arc%d: %uK RAM, %u ports, rev %u.\n",
hc->cunit,
hc->memsize/1024,
hc->numports,
hc->revision);
arc_init(hc);
if(BUS_SETUP_INTR(device_get_parent(device), device, hc->res_irq,
INTR_TYPE_NET, arintr, hc, &hc->intr_cookie) != 0)
return (1);
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 (1);
sprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit);
if (ng_name_node(sc->node, sc->nodename)) {
NG_NODE_UNREF(sc->node); /* drop it again */
return (1);
}
NG_NODE_SET_PRIVATE(sc->node, 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", NULL, MTX_DEF);
mtx_init(&sc->xmitq_hipri.ifq_mtx, "ar_xmitq_hipri", NULL,
MTX_DEF);
sc->running = 0;
#endif /* NETGRAPH */
}
if(hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(hc);
return (0);
}
int
ar_detach(device_t device)
{
device_t parent = device_get_parent(device);
struct ar_hardc *hc = device_get_softc(device);
if (hc->intr_cookie != NULL) {
if (BUS_TEARDOWN_INTR(parent, device,
hc->res_irq, hc->intr_cookie) != 0) {
printf("intr teardown failed.. continuing\n");
}
hc->intr_cookie = NULL;
}
/*
* deallocate any system resources we may have
* allocated on behalf of this driver.
*/
FREE(hc->sc, M_DEVBUF);
hc->sc = NULL;
hc->mem_start = NULL;
return (ar_deallocate_resources(device));
}
int
ar_allocate_ioport(device_t device, int rid, u_long size)
{
struct ar_hardc *hc = device_get_softc(device);
hc->rid_ioport = rid;
hc->res_ioport = bus_alloc_resource(device, SYS_RES_IOPORT,
&hc->rid_ioport, 0ul, ~0ul, size, RF_ACTIVE);
if (hc->res_ioport == NULL) {
goto errexit;
}
hc->bt = rman_get_bustag(hc->res_ioport);
hc->bh = rman_get_bushandle(hc->res_ioport);
return (0);
errexit:
ar_deallocate_resources(device);
return (ENXIO);
}
int
ar_allocate_irq(device_t device, int rid, u_long size)
{
struct ar_hardc *hc = device_get_softc(device);
hc->rid_irq = rid;
hc->res_irq = bus_alloc_resource(device, SYS_RES_IRQ,
&hc->rid_irq, 0ul, ~0ul, 1, RF_SHAREABLE|RF_ACTIVE);
if (hc->res_irq == NULL) {
goto errexit;
}
return (0);
errexit:
ar_deallocate_resources(device);
return (ENXIO);
}
int
ar_allocate_memory(device_t device, int rid, u_long size)
{
struct ar_hardc *hc = device_get_softc(device);
hc->rid_memory = rid;
hc->res_memory = bus_alloc_resource(device, SYS_RES_MEMORY,
&hc->rid_memory, 0ul, ~0ul, size, RF_ACTIVE);
if (hc->res_memory == NULL) {
goto errexit;
}
return (0);
errexit:
ar_deallocate_resources(device);
return (ENXIO);
}
int
ar_allocate_plx_memory(device_t device, int rid, u_long size)
{
struct ar_hardc *hc = device_get_softc(device);
hc->rid_plx_memory = rid;
hc->res_plx_memory = bus_alloc_resource(device, SYS_RES_MEMORY,
&hc->rid_plx_memory, 0ul, ~0ul, size, RF_ACTIVE);
if (hc->res_plx_memory == NULL) {
goto errexit;
}
return (0);
errexit:
ar_deallocate_resources(device);
return (ENXIO);
}
int
ar_deallocate_resources(device_t device)
{
struct ar_hardc *hc = device_get_softc(device);
if (hc->res_irq != 0) {
bus_deactivate_resource(device, SYS_RES_IRQ,
hc->rid_irq, hc->res_irq);
bus_release_resource(device, SYS_RES_IRQ,
hc->rid_irq, hc->res_irq);
hc->res_irq = 0;
}
if (hc->res_ioport != 0) {
bus_deactivate_resource(device, SYS_RES_IOPORT,
hc->rid_ioport, hc->res_ioport);
bus_release_resource(device, SYS_RES_IOPORT,
hc->rid_ioport, hc->res_ioport);
hc->res_ioport = 0;
}
if (hc->res_memory != 0) {
bus_deactivate_resource(device, SYS_RES_MEMORY,
hc->rid_memory, hc->res_memory);
bus_release_resource(device, SYS_RES_MEMORY,
hc->rid_memory, hc->res_memory);
hc->res_memory = 0;
}
if (hc->res_plx_memory != 0) {
bus_deactivate_resource(device, SYS_RES_MEMORY,
hc->rid_plx_memory, hc->res_plx_memory);
bus_release_resource(device, SYS_RES_MEMORY,
hc->rid_plx_memory, hc->res_plx_memory);
hc->res_plx_memory = 0;
}
return (0);
}
/*
* 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(void *arg)
{
struct ar_hardc *hc = (struct ar_hardc *)arg;
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 = ar_inb(hc, 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, 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 = ar_inb(hc, AR_ISTAT);
}
}
if(hc->bustype == AR_BUS_ISA)
ARC_SET_OFF(hc);
}
/*
* 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, 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);
}
/*
* 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, 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
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);
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(if_printf(ifp, "arioctl.\n");)
was_up = ifp->if_flags & IFF_RUNNING;
error = sppp_ioctl(ifp, cmd, data);
TRC(if_printf(ifp, "ioctl: ifsppp.pp_flags = %x, if_flags %x.\n",
((struct sppp *)ifp)->pp_flags, ifp->if_flags);)
if(error)
return (error);
if((cmd != SIOCSIFFLAGS) && cmd != (SIOCSIFADDR))
return (0);
TRC(if_printf(ifp, "arioctl %s.\n",
(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, 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, 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
ar_outb(sc->hc, 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)
ar_inb(sc->hc, 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);
#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, sc->scano);
msci->cmd = SCA_CMD_RXDISABLE;
if(sc->hc->bustype == AR_BUS_ISA)
ar_inb(sc->hc, 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
ar_outb(sc->hc, 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);
}
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;
u_long memst;
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
ar_outb(hc, 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
ar_outb(hc, AR_TXC_DTR0, hc->txc_dtr[0]);
if(hc->bustype == AR_BUS_ISA) {
/*
* Configure the card.
* Mem address, irq,
*/
memst = rman_get_start(hc->res_memory);
mar = memst >> 16;
isr = irqtable[hc->isa_irq] << 1;
if(isr == 0)
printf("ar%d: Warning illegal interrupt %d\n",
hc->cunit, hc->isa_irq);
isr = isr | ((memst & 0xc000) >> 10);
hc->sca[0] = (sca_regs *)hc->mem_start;
hc->sca[1] = (sca_regs *)hc->mem_start;
ar_outb(hc, AR_MEM_SEL, mar);
ar_outb(hc, 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
ar_outb(hc, 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
ar_outb(hc, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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
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, 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, 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, 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, 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);
#ifndef NETGRAPH
#define IPACKETS sc->ifsppp.pp_if.if_ipackets
#else /* NETGRAPH */
#define IPACKETS sc->ipackets
#endif /* NETGRAPH */
TRC(if(tt == IPACKETS) {
sca_descriptor *rxdesc;
int i;
if(hc->bustype == AR_BUS_ISA)
ARC_SET_SCA(hc, 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,
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, 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, 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 node)
{
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 = NG_NODE_PRIVATE(node);
/*
* check if it's our friend the debug hook
*/
if (strcmp(name, NG_AR_HOOK_DEBUG) == 0) {
NG_HOOK_SET_PRIVATE(hook, NULL); /* paranoid */
sc->debug_hook = hook;
return (0);
}
/*
* Check for raw mode hook.
*/
if (strcmp(name, NG_AR_HOOK_RAW) != 0) {
return (EINVAL);
}
NG_HOOK_SET_PRIVATE(hook, 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, item_p item, hook_p lasthook)
{
struct ar_softc * sc;
struct ng_mesg *resp = NULL;
int error = 0;
struct ng_mesg *msg;
NGI_GET_MSG(item, msg);
sc = NG_NODE_PRIVATE(node);
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 */
NG_RESPOND_MSG(error, node, item, resp);
NG_FREE_MSG(msg);
return (error);
}
/*
* get data from another node and transmit it to the correct channel
*/
static int
ngar_rcvdata(hook_p hook, item_p item)
{
int s;
int error = 0;
struct ar_softc * sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
struct ifqueue *xmitq_p;
struct mbuf *m;
meta_p meta;
NGI_GET_M(item, m);
NGI_GET_META(item, meta);
NG_FREE_ITEM(item);
/*
* data doesn't come in from just anywhere (e.g control hook)
*/
if ( NG_HOOK_PRIVATE(hook) == 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_M(m);
NG_FREE_META(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_shutdown(node_p node)
{
struct ar_softc * sc = NG_NODE_PRIVATE(node);
ar_down(sc);
NG_NODE_UNREF(node);
/* XXX need to drain the output queues! */
/* The node is dead, long live the node! */
/* stolen from the attach routine */
if (ng_make_node_common(&typestruct, &sc->node) != 0)
return (0);
sprintf(sc->nodename, "%s%d", NG_AR_NODE_TYPE, sc->unit);
if (ng_name_node(sc->node, sc->nodename)) {
sc->node = NULL;
printf("node naming failed\n");
NG_NODE_UNREF(sc->node); /* node dissappears */
return (0);
}
NG_NODE_SET_PRIVATE(sc->node, sc);
sc->running = 0;
return (0);
}
/* already linked */
static int
ngar_connect(hook_p hook)
{
/* probably not at splnet, force outward queueing */
NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
/* 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 = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
int s;
/*
* If it's the data hook, then free resources etc.
*/
if (NG_HOOK_PRIVATE(hook)) {
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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