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785 lines
18 KiB
C
785 lines
18 KiB
C
/* Copyright (c) 1994, Matthew E. Kimmel. Permission is hereby granted
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* to use, copy, modify and distribute this software provided that both
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* the copyright notice and this permission notice appear in all copies
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* of the software, derivative works or modified versions, and any
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* portions thereof.
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*
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* Questions, comments, bug reports and fixes to kimmel@cs.umass.edu.
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*
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* $Id: if_el.c,v 1.39 1998/12/07 21:58:21 archie Exp $
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*/
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/* Except of course for the portions of code lifted from other FreeBSD
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* drivers (mainly elread, elget and el_ioctl)
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*/
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/* 3COM Etherlink 3C501 device driver for FreeBSD */
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/* Yeah, I know these cards suck, but you can also get them for free
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* really easily...
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*/
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/* Bugs/possible improvements:
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* - Does not currently support DMA
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* - Does not currently support multicasts
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*/
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#include "el.h"
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#include "bpfilter.h"
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#include "opt_inet.h"
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#include "opt_ipx.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sockio.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <net/if.h>
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#ifdef INET
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#include <netinet/in.h>
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#include <netinet/if_ether.h>
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#endif
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#ifdef IPX
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#include <netipx/ipx.h>
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#include <netipx/ipx_if.h>
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#endif
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#ifdef NS
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#include <netns/ns.h>
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#include <netns/ns_if.h>
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#endif
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#if NBPFILTER > 0
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#include <net/bpf.h>
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#endif
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#include <machine/clock.h>
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#include <i386/isa/isa_device.h>
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#include <i386/isa/if_elreg.h>
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/* For debugging convenience */
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#ifdef EL_DEBUG
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#define dprintf(x) printf x
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#else
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#define dprintf(x)
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#endif
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/* el_softc: per line info and status */
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static struct el_softc {
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struct arpcom arpcom; /* Ethernet common */
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u_short el_base; /* Base I/O addr */
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char el_pktbuf[EL_BUFSIZ]; /* Frame buffer */
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} el_softc[NEL];
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/* Prototypes */
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static int el_attach(struct isa_device *);
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static void el_init(int);
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static int el_ioctl(struct ifnet *,u_long,caddr_t);
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static int el_probe(struct isa_device *);
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static void el_start(struct ifnet *);
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static void el_reset(int);
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static void el_watchdog(struct ifnet *);
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static void el_stop(int);
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static int el_xmit(struct el_softc *,int);
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static ointhand2_t elintr;
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static __inline void elread(struct el_softc *,caddr_t,int);
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static struct mbuf *elget(caddr_t,int,int,struct ifnet *);
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static __inline void el_hardreset(int);
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/* isa_driver structure for autoconf */
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struct isa_driver eldriver = {
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el_probe, el_attach, "el"
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};
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/* Probe routine. See if the card is there and at the right place. */
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static int
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el_probe(struct isa_device *idev)
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{
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struct el_softc *sc;
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u_short base; /* Just for convenience */
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u_char station_addr[ETHER_ADDR_LEN];
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int i;
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/* Grab some info for our structure */
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sc = &el_softc[idev->id_unit];
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sc->el_base = idev->id_iobase;
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base = sc->el_base;
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/* First check the base */
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if((base < 0x280) || (base > 0x3f0)) {
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printf("el%d: ioaddr must be between 0x280 and 0x3f0\n",
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idev->id_unit);
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return(0);
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}
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/* Now attempt to grab the station address from the PROM
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* and see if it contains the 3com vendor code.
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*/
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dprintf(("Probing 3c501 at 0x%x...\n",base));
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/* Reset the board */
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dprintf(("Resetting board...\n"));
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outb(base+EL_AC,EL_AC_RESET);
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DELAY(5);
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outb(base+EL_AC,0);
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dprintf(("Reading station address...\n"));
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/* Now read the address */
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for(i=0;i<ETHER_ADDR_LEN;i++) {
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outb(base+EL_GPBL,i);
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station_addr[i] = inb(base+EL_EAW);
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}
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dprintf(("Address is %6D\n",station_addr, ":"));
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/* If the vendor code is ok, return a 1. We'll assume that
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* whoever configured this system is right about the IRQ.
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*/
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if((station_addr[0] != 0x02) || (station_addr[1] != 0x60)
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|| (station_addr[2] != 0x8c)) {
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dprintf(("Bad vendor code.\n"));
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return(0);
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} else {
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dprintf(("Vendor code ok.\n"));
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/* Copy the station address into the arpcom structure */
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bcopy(station_addr,sc->arpcom.ac_enaddr,ETHER_ADDR_LEN);
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return(1);
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}
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}
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/* Do a hardware reset of the 3c501. Do not call until after el_probe()! */
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static __inline void
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el_hardreset(int unit)
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{
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register struct el_softc *sc;
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register int base;
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register int j;
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sc = &el_softc[unit];
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base = sc->el_base;
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/* First reset the board */
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outb(base+EL_AC,EL_AC_RESET);
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DELAY(5);
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outb(base+EL_AC,0);
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/* Then give it back its ethernet address. Thanks to the mach
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* source code for this undocumented goodie...
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*/
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for(j=0;j<ETHER_ADDR_LEN;j++)
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outb(base+j,sc->arpcom.ac_enaddr[j]);
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}
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/* Attach the interface to the kernel data structures. By the time
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* this is called, we know that the card exists at the given I/O address.
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* We still assume that the IRQ given is correct.
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*/
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static int
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el_attach(struct isa_device *idev)
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{
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struct el_softc *sc;
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struct ifnet *ifp;
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u_short base;
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dprintf(("Attaching el%d...\n",idev->id_unit));
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/* Get things pointing to the right places. */
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idev->id_ointr = elintr;
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sc = &el_softc[idev->id_unit];
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ifp = &sc->arpcom.ac_if;
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base = sc->el_base;
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/* Now reset the board */
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dprintf(("Resetting board...\n"));
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el_hardreset(idev->id_unit);
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/* Initialize ifnet structure */
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ifp->if_softc = sc;
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ifp->if_unit = idev->id_unit;
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ifp->if_name = "el";
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ifp->if_mtu = ETHERMTU;
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ifp->if_output = ether_output;
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ifp->if_start = el_start;
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ifp->if_ioctl = el_ioctl;
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ifp->if_watchdog = el_watchdog;
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ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX);
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/* Now we can attach the interface */
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dprintf(("Attaching interface...\n"));
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if_attach(ifp);
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ether_ifattach(ifp);
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/* Print out some information for the user */
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printf("el%d: 3c501 address %6D\n",idev->id_unit,
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sc->arpcom.ac_enaddr, ":");
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/* Finally, attach to bpf filter if it is present. */
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#if NBPFILTER > 0
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dprintf(("Attaching to BPF...\n"));
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bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
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#endif
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dprintf(("el_attach() finished.\n"));
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return(1);
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}
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/* This routine resets the interface. */
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static void
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el_reset(int unit)
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{
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int s;
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dprintf(("elreset()\n"));
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s = splimp();
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el_stop(unit);
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el_init(unit);
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splx(s);
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}
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static void el_stop(int unit)
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{
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struct el_softc *sc;
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sc = &el_softc[unit];
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outb(sc->el_base+EL_AC,0);
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}
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/* Initialize interface. */
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static void
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el_init(int unit)
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{
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struct el_softc *sc;
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struct ifnet *ifp;
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int s;
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u_short base;
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/* Set up pointers */
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sc = &el_softc[unit];
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ifp = &sc->arpcom.ac_if;
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base = sc->el_base;
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/* If address not known, do nothing. */
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if(TAILQ_EMPTY(&ifp->if_addrhead)) /* XXX unlikely */
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return;
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s = splimp();
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/* First, reset the board. */
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dprintf(("Resetting board...\n"));
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el_hardreset(unit);
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/* Configure rx */
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dprintf(("Configuring rx...\n"));
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if(ifp->if_flags & IFF_PROMISC)
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outb(base+EL_RXC,(EL_RXC_PROMISC|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
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else
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outb(base+EL_RXC,(EL_RXC_ABROAD|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
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outb(base+EL_RBC,0);
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/* Configure TX */
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dprintf(("Configuring tx...\n"));
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outb(base+EL_TXC,0);
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/* Start reception */
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dprintf(("Starting reception...\n"));
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outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
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/* Set flags appropriately */
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ifp->if_flags |= IFF_RUNNING;
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ifp->if_flags &= ~IFF_OACTIVE;
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/* And start output. */
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el_start(ifp);
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splx(s);
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}
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/* Start output on interface. Get datagrams from the queue and output
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* them, giving the receiver a chance between datagrams. Call only
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* from splimp or interrupt level!
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*/
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static void
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el_start(struct ifnet *ifp)
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{
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struct el_softc *sc;
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u_short base;
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struct mbuf *m, *m0;
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int s, i, len, retries, done;
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/* Get things pointing in the right directions */
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sc = ifp->if_softc;
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base = sc->el_base;
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dprintf(("el_start()...\n"));
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s = splimp();
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/* Don't do anything if output is active */
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if(sc->arpcom.ac_if.if_flags & IFF_OACTIVE)
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return;
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sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
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/* The main loop. They warned me against endless loops, but
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* would I listen? NOOO....
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*/
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while(1) {
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/* Dequeue the next datagram */
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IF_DEQUEUE(&sc->arpcom.ac_if.if_snd,m0);
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/* If there's nothing to send, return. */
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if(m0 == NULL) {
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sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
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splx(s);
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return;
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}
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/* Disable the receiver */
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outb(base+EL_AC,EL_AC_HOST);
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outb(base+EL_RBC,0);
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/* Copy the datagram to the buffer. */
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len = 0;
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for(m = m0; m != NULL; m = m->m_next) {
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if(m->m_len == 0)
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continue;
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bcopy(mtod(m,caddr_t),sc->el_pktbuf+len,m->m_len);
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len += m->m_len;
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}
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m_freem(m0);
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len = max(len,ETHER_MIN_LEN);
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/* Give the packet to the bpf, if any */
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#if NBPFILTER > 0
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if(sc->arpcom.ac_if.if_bpf)
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bpf_tap(&sc->arpcom.ac_if, sc->el_pktbuf, len);
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#endif
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/* Transfer datagram to board */
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dprintf(("el: xfr pkt length=%d...\n",len));
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i = EL_BUFSIZ - len;
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outb(base+EL_GPBL,(i & 0xff));
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outb(base+EL_GPBH,((i>>8)&0xff));
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outsb(base+EL_BUF,sc->el_pktbuf,len);
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/* Now transmit the datagram */
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retries=0;
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done=0;
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while(!done) {
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if(el_xmit(sc,len)) { /* Something went wrong */
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done = -1;
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break;
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}
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/* Check out status */
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i = inb(base+EL_TXS);
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dprintf(("tx status=0x%x\n",i));
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if(!(i & EL_TXS_READY)) {
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dprintf(("el: err txs=%x\n",i));
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sc->arpcom.ac_if.if_oerrors++;
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if(i & (EL_TXS_COLL|EL_TXS_COLL16)) {
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if((!(i & EL_TXC_DCOLL16)) && retries < 15) {
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retries++;
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outb(base+EL_AC,EL_AC_HOST);
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}
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}
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else
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done = 1;
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}
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else {
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sc->arpcom.ac_if.if_opackets++;
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done = 1;
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}
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}
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if(done == -1) /* Packet not transmitted */
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continue;
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/* Now give the card a chance to receive.
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* Gotta love 3c501s...
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*/
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(void)inb(base+EL_AS);
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outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
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splx(s);
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/* Interrupt here */
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s = splimp();
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}
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}
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/* This function actually attempts to transmit a datagram downloaded
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* to the board. Call at splimp or interrupt, after downloading data!
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* Returns 0 on success, non-0 on failure
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*/
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static int
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el_xmit(struct el_softc *sc,int len)
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{
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int gpl;
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int i;
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gpl = EL_BUFSIZ - len;
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dprintf(("el: xmit..."));
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outb((sc->el_base)+EL_GPBL,(gpl & 0xff));
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outb((sc->el_base)+EL_GPBH,((gpl>>8)&0xff));
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outb((sc->el_base)+EL_AC,EL_AC_TXFRX);
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i = 20000;
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while((inb((sc->el_base)+EL_AS) & EL_AS_TXBUSY) && (i>0))
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i--;
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if(i == 0) {
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dprintf(("tx not ready\n"));
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sc->arpcom.ac_if.if_oerrors++;
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return(-1);
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}
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dprintf(("%d cycles.\n",(20000-i)));
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return(0);
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}
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/* Pass a packet up to the higher levels. */
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static __inline void
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elread(struct el_softc *sc,caddr_t buf,int len)
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{
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register struct ether_header *eh;
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struct mbuf *m;
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eh = (struct ether_header *)buf;
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#if NBPFILTER > 0
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/*
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* Check if there's a bpf filter listening on this interface.
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* If so, hand off the raw packet to bpf.
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*/
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if(sc->arpcom.ac_if.if_bpf) {
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bpf_tap(&sc->arpcom.ac_if, buf,
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len + sizeof(struct ether_header));
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/*
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* Note that the interface cannot be in promiscuous mode if
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* there are no bpf listeners. And if el are in promiscuous
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* mode, el have to check if this packet is really ours.
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*
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* This test does not support multicasts.
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*/
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if((sc->arpcom.ac_if.if_flags & IFF_PROMISC)
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&& bcmp(eh->ether_dhost,sc->arpcom.ac_enaddr,
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sizeof(eh->ether_dhost)) != 0
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&& bcmp(eh->ether_dhost,etherbroadcastaddr,
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sizeof(eh->ether_dhost)) != 0)
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return;
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}
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#endif
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/*
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* Pull packet off interface.
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*/
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m = elget(buf,len,0,&sc->arpcom.ac_if);
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if(m == 0)
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return;
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ether_input(&sc->arpcom.ac_if,eh,m);
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}
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/* controller interrupt */
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static void
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elintr(int unit)
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{
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register struct el_softc *sc;
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register int base;
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int stat, rxstat, len, done;
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/* Get things pointing properly */
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sc = &el_softc[unit];
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base = sc->el_base;
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dprintf(("elintr: "));
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/* Check board status */
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stat = inb(base+EL_AS);
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if(stat & EL_AS_RXBUSY) {
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(void)inb(base+EL_RXC);
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outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
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return;
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}
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done = 0;
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while(!done) {
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rxstat = inb(base+EL_RXS);
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if(rxstat & EL_RXS_STALE) {
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(void)inb(base+EL_RXC);
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outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
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return;
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}
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/* If there's an overflow, reinit the board. */
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if(!(rxstat & EL_RXS_NOFLOW)) {
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dprintf(("overflow.\n"));
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el_hardreset(unit);
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/* Put board back into receive mode */
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if(sc->arpcom.ac_if.if_flags & IFF_PROMISC)
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outb(base+EL_RXC,(EL_RXC_PROMISC|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
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else
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outb(base+EL_RXC,(EL_RXC_ABROAD|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
(void)inb(base+EL_AS);
|
|
outb(base+EL_RBC,0);
|
|
(void)inb(base+EL_RXC);
|
|
outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
return;
|
|
}
|
|
|
|
/* Incoming packet */
|
|
len = inb(base+EL_RBL);
|
|
len |= inb(base+EL_RBH) << 8;
|
|
dprintf(("receive len=%d rxstat=%x ",len,rxstat));
|
|
outb(base+EL_AC,EL_AC_HOST);
|
|
|
|
/* If packet too short or too long, restore rx mode and return
|
|
*/
|
|
if((len <= sizeof(struct ether_header)) || (len > ETHER_MAX_LEN)) {
|
|
if(sc->arpcom.ac_if.if_flags & IFF_PROMISC)
|
|
outb(base+EL_RXC,(EL_RXC_PROMISC|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
else
|
|
outb(base+EL_RXC,(EL_RXC_ABROAD|EL_RXC_AGF|EL_RXC_DSHORT|EL_RXC_DDRIB|EL_RXC_DOFLOW));
|
|
(void)inb(base+EL_AS);
|
|
outb(base+EL_RBC,0);
|
|
(void)inb(base+EL_RXC);
|
|
outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
return;
|
|
}
|
|
|
|
sc->arpcom.ac_if.if_ipackets++;
|
|
|
|
/* Copy the data into our buffer */
|
|
outb(base+EL_GPBL,0);
|
|
outb(base+EL_GPBH,0);
|
|
insb(base+EL_BUF,sc->el_pktbuf,len);
|
|
outb(base+EL_RBC,0);
|
|
outb(base+EL_AC,EL_AC_RX);
|
|
dprintf(("%6D-->",sc->el_pktbuf+6,":"));
|
|
dprintf(("%6D\n",sc->el_pktbuf,":"));
|
|
|
|
/* Pass data up to upper levels */
|
|
len -= sizeof(struct ether_header);
|
|
elread(sc,(caddr_t)(sc->el_pktbuf),len);
|
|
|
|
/* Is there another packet? */
|
|
stat = inb(base+EL_AS);
|
|
|
|
/* If so, do it all again (i.e. don't set done to 1) */
|
|
if(!(stat & EL_AS_RXBUSY))
|
|
dprintf(("<rescan> "));
|
|
else
|
|
done = 1;
|
|
}
|
|
|
|
(void)inb(base+EL_RXC);
|
|
outb(base+EL_AC,(EL_AC_IRQE|EL_AC_RX));
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Pull read data off a interface.
|
|
* Len is length of data, with local net header stripped.
|
|
*/
|
|
struct mbuf *
|
|
elget(buf, totlen, off0, ifp)
|
|
caddr_t buf;
|
|
int totlen, off0;
|
|
struct ifnet *ifp;
|
|
{
|
|
struct mbuf *top, **mp, *m;
|
|
int off = off0, len;
|
|
register caddr_t cp = buf;
|
|
char *epkt;
|
|
|
|
buf += sizeof(struct ether_header);
|
|
cp = buf;
|
|
epkt = cp + totlen;
|
|
|
|
|
|
if (off) {
|
|
cp += off + 2 * sizeof(u_short);
|
|
totlen -= 2 * sizeof(u_short);
|
|
}
|
|
|
|
MGETHDR(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0)
|
|
return (0);
|
|
m->m_pkthdr.rcvif = ifp;
|
|
m->m_pkthdr.len = totlen;
|
|
m->m_len = MHLEN;
|
|
top = 0;
|
|
mp = ⊤
|
|
while (totlen > 0) {
|
|
if (top) {
|
|
MGET(m, M_DONTWAIT, MT_DATA);
|
|
if (m == 0) {
|
|
m_freem(top);
|
|
return (0);
|
|
}
|
|
m->m_len = MLEN;
|
|
}
|
|
len = min(totlen, epkt - cp);
|
|
if (len >= MINCLSIZE) {
|
|
MCLGET(m, M_DONTWAIT);
|
|
if (m->m_flags & M_EXT)
|
|
m->m_len = len = min(len, MCLBYTES);
|
|
else
|
|
len = m->m_len;
|
|
} else {
|
|
/*
|
|
* Place initial small packet/header at end of mbuf.
|
|
*/
|
|
if (len < m->m_len) {
|
|
if (top == 0 && len + max_linkhdr <= m->m_len)
|
|
m->m_data += max_linkhdr;
|
|
m->m_len = len;
|
|
} else
|
|
len = m->m_len;
|
|
}
|
|
bcopy(cp, mtod(m, caddr_t), (unsigned)len);
|
|
cp += len;
|
|
*mp = m;
|
|
mp = &m->m_next;
|
|
totlen -= len;
|
|
if (cp == epkt)
|
|
cp = buf;
|
|
}
|
|
return (top);
|
|
}
|
|
|
|
/*
|
|
* Process an ioctl request. This code needs some work - it looks
|
|
* pretty ugly.
|
|
*/
|
|
static int
|
|
el_ioctl(ifp, command, data)
|
|
register struct ifnet *ifp;
|
|
u_long command;
|
|
caddr_t data;
|
|
{
|
|
register struct ifaddr *ifa = (struct ifaddr *)data;
|
|
struct el_softc *sc = ifp->if_softc;
|
|
struct ifreq *ifr = (struct ifreq *)data;
|
|
int s, error = 0;
|
|
|
|
s = splimp();
|
|
|
|
switch (command) {
|
|
|
|
case SIOCSIFADDR:
|
|
ifp->if_flags |= IFF_UP;
|
|
|
|
switch (ifa->ifa_addr->sa_family) {
|
|
#ifdef INET
|
|
case AF_INET:
|
|
el_init(ifp->if_unit); /* before arpwhohas */
|
|
arp_ifinit((struct arpcom *)ifp, ifa);
|
|
break;
|
|
#endif
|
|
#ifdef IPX
|
|
/*
|
|
* XXX - This code is probably wrong
|
|
*/
|
|
case AF_IPX:
|
|
{
|
|
register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
|
|
|
|
if (ipx_nullhost(*ina))
|
|
ina->x_host =
|
|
*(union ipx_host *)(sc->arpcom.ac_enaddr);
|
|
else {
|
|
/*
|
|
*
|
|
*/
|
|
bcopy((caddr_t)ina->x_host.c_host,
|
|
(caddr_t)sc->arpcom.ac_enaddr,
|
|
sizeof(sc->arpcom.ac_enaddr));
|
|
}
|
|
/*
|
|
* Set new address
|
|
*/
|
|
el_init(ifp->if_unit);
|
|
break;
|
|
}
|
|
#endif
|
|
#ifdef NS
|
|
/*
|
|
* XXX - This code is probably wrong
|
|
*/
|
|
case AF_NS:
|
|
{
|
|
register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
|
|
|
|
if (ns_nullhost(*ina))
|
|
ina->x_host =
|
|
*(union ns_host *)(sc->arpcom.ac_enaddr);
|
|
else {
|
|
/*
|
|
*
|
|
*/
|
|
bcopy((caddr_t)ina->x_host.c_host,
|
|
(caddr_t)sc->arpcom.ac_enaddr,
|
|
sizeof(sc->arpcom.ac_enaddr));
|
|
}
|
|
/*
|
|
* Set new address
|
|
*/
|
|
el_init(ifp->if_unit);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
el_init(ifp->if_unit);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case SIOCGIFADDR:
|
|
{
|
|
struct sockaddr *sa;
|
|
sa = (struct sockaddr *)&ifr->ifr_data;
|
|
bcopy((caddr_t)sc->arpcom.ac_enaddr,
|
|
(caddr_t) sa->sa_data, ETHER_ADDR_LEN);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFFLAGS:
|
|
/*
|
|
* If interface is marked down and it is running, then stop it
|
|
*/
|
|
if (((ifp->if_flags & IFF_UP) == 0) &&
|
|
(ifp->if_flags & IFF_RUNNING)) {
|
|
el_stop(ifp->if_unit);
|
|
ifp->if_flags &= ~IFF_RUNNING;
|
|
} else {
|
|
/*
|
|
* If interface is marked up and it is stopped, then start it
|
|
*/
|
|
if ((ifp->if_flags & IFF_UP) &&
|
|
((ifp->if_flags & IFF_RUNNING) == 0))
|
|
el_init(ifp->if_unit);
|
|
}
|
|
break;
|
|
|
|
case SIOCSIFMTU:
|
|
|
|
/*
|
|
* Set the interface MTU.
|
|
*/
|
|
if (ifr->ifr_mtu > ETHERMTU) {
|
|
error = EINVAL;
|
|
} else {
|
|
ifp->if_mtu = ifr->ifr_mtu;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
}
|
|
(void) splx(s);
|
|
return (error);
|
|
}
|
|
|
|
/* Device timeout routine */
|
|
static void
|
|
el_watchdog(struct ifnet *ifp)
|
|
{
|
|
log(LOG_ERR,"el%d: device timeout\n", ifp->if_unit);
|
|
ifp->if_oerrors++;
|
|
el_reset(ifp->if_unit);
|
|
}
|