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1042 lines
30 KiB
1042 lines
30 KiB
20 years ago
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/*
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** -----------------------------------------------------------------------------
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**
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** Perle Specialix driver for Linux
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** ported from the existing SCO driver source
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**
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*
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* (C) 1990 - 2000 Specialix International Ltd., Byfleet, Surrey, UK.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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**
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** Module : riocmd.c
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** SID : 1.2
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** Last Modified : 11/6/98 10:33:41
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** Retrieved : 11/6/98 10:33:49
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**
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** ident @(#)riocmd.c 1.2
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**
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** -----------------------------------------------------------------------------
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*/
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#ifdef SCCS_LABELS
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static char *_riocmd_c_sccs_ = "@(#)riocmd.c 1.2";
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#endif
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/tty.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/string.h>
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#include <asm/semaphore.h>
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#include <linux/termios.h>
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#include <linux/serial.h>
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#include <linux/generic_serial.h>
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#include "linux_compat.h"
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#include "rio_linux.h"
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#include "typdef.h"
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#include "pkt.h"
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#include "daemon.h"
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#include "rio.h"
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#include "riospace.h"
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#include "top.h"
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#include "cmdpkt.h"
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#include "map.h"
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#include "riotypes.h"
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#include "rup.h"
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#include "port.h"
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#include "riodrvr.h"
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#include "rioinfo.h"
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#include "func.h"
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#include "errors.h"
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#include "pci.h"
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#include "parmmap.h"
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#include "unixrup.h"
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#include "board.h"
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#include "host.h"
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#include "error.h"
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#include "phb.h"
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#include "link.h"
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#include "cmdblk.h"
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#include "route.h"
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#include "control.h"
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#include "cirrus.h"
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static struct IdentifyRta IdRta;
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static struct KillNeighbour KillUnit;
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int
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RIOFoadRta(struct Host *HostP, struct Map *MapP)
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{
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struct CmdBlk *CmdBlkP;
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rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA\n");
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CmdBlkP = RIOGetCmdBlk();
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if ( !CmdBlkP ) {
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rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: GetCmdBlk failed\n");
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return -ENXIO;
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}
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CmdBlkP->Packet.dest_unit = MapP->ID;
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CmdBlkP->Packet.dest_port = BOOT_RUP;
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CmdBlkP->Packet.src_unit = 0;
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CmdBlkP->Packet.src_port = BOOT_RUP;
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CmdBlkP->Packet.len = 0x84;
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CmdBlkP->Packet.data[0] = IFOAD;
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CmdBlkP->Packet.data[1] = 0;
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CmdBlkP->Packet.data[2] = IFOAD_MAGIC & 0xFF;
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CmdBlkP->Packet.data[3] = (IFOAD_MAGIC >> 8) & 0xFF;
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if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
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rio_dprintk (RIO_DEBUG_CMD, "FOAD RTA: Failed to queue foad command\n");
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return -EIO;
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}
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return 0;
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}
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int
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RIOZombieRta(struct Host *HostP, struct Map *MapP)
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{
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struct CmdBlk *CmdBlkP;
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rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA\n");
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CmdBlkP = RIOGetCmdBlk();
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if ( !CmdBlkP ) {
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rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: GetCmdBlk failed\n");
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return -ENXIO;
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}
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CmdBlkP->Packet.dest_unit = MapP->ID;
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CmdBlkP->Packet.dest_port = BOOT_RUP;
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CmdBlkP->Packet.src_unit = 0;
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CmdBlkP->Packet.src_port = BOOT_RUP;
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CmdBlkP->Packet.len = 0x84;
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CmdBlkP->Packet.data[0] = ZOMBIE;
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CmdBlkP->Packet.data[1] = 0;
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CmdBlkP->Packet.data[2] = ZOMBIE_MAGIC & 0xFF;
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CmdBlkP->Packet.data[3] = (ZOMBIE_MAGIC >> 8) & 0xFF;
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if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
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rio_dprintk (RIO_DEBUG_CMD, "ZOMBIE RTA: Failed to queue zombie command\n");
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return -EIO;
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}
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return 0;
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}
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int
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RIOCommandRta(struct rio_info *p, uint RtaUnique,
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int (* func)(struct Host *HostP, struct Map *MapP))
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{
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uint Host;
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rio_dprintk (RIO_DEBUG_CMD, "Command RTA 0x%x func 0x%x\n", RtaUnique, (int)func);
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if ( !RtaUnique )
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return(0);
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for ( Host = 0; Host < p->RIONumHosts; Host++ ) {
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uint Rta;
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struct Host *HostP = &p->RIOHosts[Host];
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for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) {
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struct Map *MapP = &HostP->Mapping[Rta];
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if ( MapP->RtaUniqueNum == RtaUnique ) {
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uint Link;
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/*
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** now, lets just check we have a route to it...
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** IF the routing stuff is working, then one of the
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** topology entries for this unit will have a legit
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** route *somewhere*. We care not where - if its got
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** any connections, we can get to it.
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*/
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for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) {
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if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) {
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/*
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** Its worth trying the operation...
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*/
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return (*func)( HostP, MapP );
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}
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}
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}
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}
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}
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return -ENXIO;
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}
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int
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RIOIdentifyRta(struct rio_info *p, caddr_t arg)
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{
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uint Host;
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if ( copyin( (int)arg, (caddr_t)&IdRta, sizeof(IdRta) ) == COPYFAIL ) {
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rio_dprintk (RIO_DEBUG_CMD, "RIO_IDENTIFY_RTA copy failed\n");
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p->RIOError.Error = COPYIN_FAILED;
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return -EFAULT;
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}
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for ( Host = 0 ; Host < p->RIONumHosts; Host++ ) {
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uint Rta;
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struct Host *HostP = &p->RIOHosts[Host];
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for ( Rta = 0; Rta < RTAS_PER_HOST; Rta++ ) {
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struct Map *MapP = &HostP->Mapping[Rta];
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if ( MapP->RtaUniqueNum == IdRta.RtaUnique ) {
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uint Link;
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/*
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** now, lets just check we have a route to it...
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||
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** IF the routing stuff is working, then one of the
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||
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** topology entries for this unit will have a legit
|
||
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** route *somewhere*. We care not where - if its got
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** any connections, we can get to it.
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*/
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for ( Link = 0; Link < LINKS_PER_UNIT; Link++ ) {
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if ( MapP->Topology[Link].Unit <= (uchar)MAX_RUP ) {
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/*
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** Its worth trying the operation...
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*/
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struct CmdBlk *CmdBlkP;
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rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA\n");
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CmdBlkP = RIOGetCmdBlk();
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if ( !CmdBlkP ) {
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rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: GetCmdBlk failed\n");
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return -ENXIO;
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}
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CmdBlkP->Packet.dest_unit = MapP->ID;
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CmdBlkP->Packet.dest_port = BOOT_RUP;
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CmdBlkP->Packet.src_unit = 0;
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CmdBlkP->Packet.src_port = BOOT_RUP;
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CmdBlkP->Packet.len = 0x84;
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CmdBlkP->Packet.data[0] = IDENTIFY;
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CmdBlkP->Packet.data[1] = 0;
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CmdBlkP->Packet.data[2] = IdRta.ID;
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if ( RIOQueueCmdBlk( HostP, MapP->ID-1, CmdBlkP) == RIO_FAIL ) {
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rio_dprintk (RIO_DEBUG_CMD, "IDENTIFY RTA: Failed to queue command\n");
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return -EIO;
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||
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}
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||
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return 0;
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||
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}
|
||
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}
|
||
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}
|
||
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}
|
||
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}
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||
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return -ENOENT;
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||
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}
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||
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||
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int
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RIOKillNeighbour(struct rio_info *p, caddr_t arg)
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{
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uint Host;
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uint ID;
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||
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struct Host *HostP;
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struct CmdBlk *CmdBlkP;
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rio_dprintk (RIO_DEBUG_CMD, "KILL HOST NEIGHBOUR\n");
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if ( copyin( (int)arg, (caddr_t)&KillUnit, sizeof(KillUnit) ) == COPYFAIL ) {
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rio_dprintk (RIO_DEBUG_CMD, "RIO_KILL_NEIGHBOUR copy failed\n");
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p->RIOError.Error = COPYIN_FAILED;
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return -EFAULT;
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||
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}
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||
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||
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if ( KillUnit.Link > 3 )
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||
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return -ENXIO;
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||
|
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|
||
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CmdBlkP = RIOGetCmdBlk();
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||
|
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|
||
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if ( !CmdBlkP ) {
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||
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rio_dprintk (RIO_DEBUG_CMD, "UFOAD: GetCmdBlk failed\n");
|
||
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return -ENXIO;
|
||
|
|
}
|
||
|
|
|
||
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CmdBlkP->Packet.dest_unit = 0;
|
||
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CmdBlkP->Packet.src_unit = 0;
|
||
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CmdBlkP->Packet.dest_port = BOOT_RUP;
|
||
|
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CmdBlkP->Packet.src_port = BOOT_RUP;
|
||
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CmdBlkP->Packet.len = 0x84;
|
||
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CmdBlkP->Packet.data[0] = UFOAD;
|
||
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CmdBlkP->Packet.data[1] = KillUnit.Link;
|
||
|
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CmdBlkP->Packet.data[2] = UFOAD_MAGIC & 0xFF;
|
||
|
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CmdBlkP->Packet.data[3] = (UFOAD_MAGIC >> 8) & 0xFF;
|
||
|
|
|
||
|
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for ( Host = 0; Host < p->RIONumHosts; Host++ ) {
|
||
|
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ID = 0;
|
||
|
|
HostP = &p->RIOHosts[Host];
|
||
|
|
|
||
|
|
if ( HostP->UniqueNum == KillUnit.UniqueNum ) {
|
||
|
|
if ( RIOQueueCmdBlk( HostP, RTAS_PER_HOST+KillUnit.Link,
|
||
|
|
CmdBlkP) == RIO_FAIL ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( ID=0; ID < RTAS_PER_HOST; ID++ ) {
|
||
|
|
if ( HostP->Mapping[ID].RtaUniqueNum == KillUnit.UniqueNum ) {
|
||
|
|
CmdBlkP->Packet.dest_unit = ID+1;
|
||
|
|
if ( RIOQueueCmdBlk( HostP, ID, CmdBlkP) == RIO_FAIL ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "UFOAD: Failed queue command\n");
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
RIOFreeCmdBlk( CmdBlkP );
|
||
|
|
return -ENXIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
RIOSuspendBootRta(struct Host *HostP, int ID, int Link)
|
||
|
|
{
|
||
|
|
struct CmdBlk *CmdBlkP;
|
||
|
|
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA ID %d, link %c\n", ID, 'A' + Link);
|
||
|
|
|
||
|
|
CmdBlkP = RIOGetCmdBlk();
|
||
|
|
|
||
|
|
if ( !CmdBlkP ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: GetCmdBlk failed\n");
|
||
|
|
return -ENXIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
CmdBlkP->Packet.dest_unit = ID;
|
||
|
|
CmdBlkP->Packet.dest_port = BOOT_RUP;
|
||
|
|
CmdBlkP->Packet.src_unit = 0;
|
||
|
|
CmdBlkP->Packet.src_port = BOOT_RUP;
|
||
|
|
CmdBlkP->Packet.len = 0x84;
|
||
|
|
CmdBlkP->Packet.data[0] = IWAIT;
|
||
|
|
CmdBlkP->Packet.data[1] = Link;
|
||
|
|
CmdBlkP->Packet.data[2] = IWAIT_MAGIC & 0xFF;
|
||
|
|
CmdBlkP->Packet.data[3] = (IWAIT_MAGIC >> 8) & 0xFF;
|
||
|
|
|
||
|
|
if ( RIOQueueCmdBlk( HostP, ID - 1, CmdBlkP) == RIO_FAIL ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "SUSPEND BOOT ON RTA: Failed to queue iwait command\n");
|
||
|
|
return -EIO;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
RIOFoadWakeup(struct rio_info *p)
|
||
|
|
{
|
||
|
|
int port;
|
||
|
|
register struct Port *PortP;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
for ( port=0; port<RIO_PORTS; port++) {
|
||
|
|
PortP = p->RIOPortp[port];
|
||
|
|
|
||
|
|
rio_spin_lock_irqsave(&PortP->portSem, flags);
|
||
|
|
PortP->Config = 0;
|
||
|
|
PortP->State = 0;
|
||
|
|
PortP->InUse = NOT_INUSE;
|
||
|
|
PortP->PortState = 0;
|
||
|
|
PortP->FlushCmdBodge = 0;
|
||
|
|
PortP->ModemLines = 0;
|
||
|
|
PortP->ModemState = 0;
|
||
|
|
PortP->CookMode = 0;
|
||
|
|
PortP->ParamSem = 0;
|
||
|
|
PortP->Mapped = 0;
|
||
|
|
PortP->WflushFlag = 0;
|
||
|
|
PortP->MagicFlags = 0;
|
||
|
|
PortP->RxDataStart = 0;
|
||
|
|
PortP->TxBufferIn = 0;
|
||
|
|
PortP->TxBufferOut = 0;
|
||
|
|
rio_spin_unlock_irqrestore(&PortP->portSem, flags);
|
||
|
|
}
|
||
|
|
return(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Incoming command on the COMMAND_RUP to be processed.
|
||
|
|
*/
|
||
|
|
static int
|
||
|
|
RIOCommandRup(struct rio_info *p, uint Rup, struct Host *HostP, PKT *PacketP)
|
||
|
|
{
|
||
|
|
struct PktCmd *PktCmdP = (struct PktCmd *)PacketP->data;
|
||
|
|
struct Port *PortP;
|
||
|
|
struct UnixRup *UnixRupP;
|
||
|
|
ushort SysPort;
|
||
|
|
ushort ReportedModemStatus;
|
||
|
|
ushort rup;
|
||
|
|
ushort subCommand;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
func_enter ();
|
||
|
|
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckHost( Host );
|
||
|
|
CheckHostP( HostP );
|
||
|
|
CheckPacketP( PacketP );
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
** 16 port RTA note:
|
||
|
|
** Command rup packets coming from the RTA will have pkt->data[1] (which
|
||
|
|
** translates to PktCmdP->PhbNum) set to the host port number for the
|
||
|
|
** particular unit. To access the correct BaseSysPort for a 16 port RTA,
|
||
|
|
** we can use PhbNum to get the rup number for the appropriate 8 port
|
||
|
|
** block (for the first block, this should be equal to 'Rup').
|
||
|
|
*/
|
||
|
|
rup = RBYTE(PktCmdP->PhbNum) / (ushort)PORTS_PER_RTA;
|
||
|
|
UnixRupP = &HostP->UnixRups[rup];
|
||
|
|
SysPort = UnixRupP->BaseSysPort +
|
||
|
|
(RBYTE(PktCmdP->PhbNum) % (ushort)PORTS_PER_RTA);
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Command on rup %d, port %d\n", rup, SysPort);
|
||
|
|
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckRup( rup );
|
||
|
|
CheckUnixRupP( UnixRupP );
|
||
|
|
#endif
|
||
|
|
if ( UnixRupP->BaseSysPort == NO_PORT ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "OBSCURE ERROR!\n");
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Diagnostics follow. Please WRITE THESE DOWN and report them to Specialix Technical Support\n");
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Host number %d, name ``%s''\n",
|
||
|
|
HostP-p->RIOHosts, HostP->Name );
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: Rup number 0x%x\n", rup);
|
||
|
|
|
||
|
|
if ( Rup >= (ushort)MAX_RUP ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for RTA ``%s''\n",
|
||
|
|
HostP->Mapping[Rup].Name);
|
||
|
|
} else
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "CONTROL information: This is the RUP for link ``%c'' of host ``%s''\n",
|
||
|
|
('A' + Rup - MAX_RUP), HostP->Name);
|
||
|
|
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Destination 0x%x:0x%x\n",
|
||
|
|
PacketP->dest_unit, PacketP->dest_port );
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Source 0x%x:0x%x\n",
|
||
|
|
PacketP->src_unit, PacketP->src_port );
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Length 0x%x (%d)\n", PacketP->len,PacketP->len );
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Control 0x%x (%d)\n", PacketP->control, PacketP->control);
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "PACKET information: Check 0x%x (%d)\n", PacketP->csum, PacketP->csum );
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "COMMAND information: Host Port Number 0x%x, "
|
||
|
|
"Command Code 0x%x\n", PktCmdP->PhbNum, PktCmdP->Command );
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckSysPort( SysPort );
|
||
|
|
#endif
|
||
|
|
PortP = p->RIOPortp[ SysPort ];
|
||
|
|
rio_spin_lock_irqsave(&PortP->portSem, flags);
|
||
|
|
switch( RBYTE(PktCmdP->Command) ) {
|
||
|
|
case BREAK_RECEIVED:
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Received a break!\n");
|
||
|
|
/* If the current line disc. is not multi-threading and
|
||
|
|
the current processor is not the default, reset rup_intr
|
||
|
|
and return FALSE to ensure that the command packet is
|
||
|
|
not freed. */
|
||
|
|
/* Call tmgr HANGUP HERE */
|
||
|
|
/* Fix this later when every thing works !!!! RAMRAJ */
|
||
|
|
gs_got_break (&PortP->gs);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case COMPLETE:
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Command complete on phb %d host %d\n",
|
||
|
|
RBYTE(PktCmdP->PhbNum), HostP-p->RIOHosts);
|
||
|
|
subCommand = 1;
|
||
|
|
switch (RBYTE(PktCmdP->SubCommand)) {
|
||
|
|
case MEMDUMP :
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Memory dump cmd (0x%x) from addr 0x%x\n",
|
||
|
|
RBYTE(PktCmdP->SubCommand), RWORD(PktCmdP->SubAddr));
|
||
|
|
break;
|
||
|
|
case READ_REGISTER :
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Read register (0x%x)\n", RWORD(PktCmdP->SubAddr));
|
||
|
|
p->CdRegister = (RBYTE(PktCmdP->ModemStatus) & MSVR1_HOST);
|
||
|
|
break;
|
||
|
|
default :
|
||
|
|
subCommand = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (subCommand)
|
||
|
|
break;
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "New status is 0x%x was 0x%x\n",
|
||
|
|
RBYTE(PktCmdP->PortStatus),PortP->PortState);
|
||
|
|
if (PortP->PortState != RBYTE(PktCmdP->PortStatus)) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Mark status & wakeup\n");
|
||
|
|
PortP->PortState = RBYTE(PktCmdP->PortStatus);
|
||
|
|
/* What should we do here ...
|
||
|
|
wakeup( &PortP->PortState );
|
||
|
|
*/
|
||
|
|
} else
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "No change\n");
|
||
|
|
|
||
|
|
/* FALLTHROUGH */
|
||
|
|
case MODEM_STATUS:
|
||
|
|
/*
|
||
|
|
** Knock out the tbusy and tstop bits, as these are not relevant
|
||
|
|
** to the check for modem status change (they're just there because
|
||
|
|
** it's a convenient place to put them!).
|
||
|
|
*/
|
||
|
|
ReportedModemStatus = RBYTE(PktCmdP->ModemStatus);
|
||
|
|
if ((PortP->ModemState & MSVR1_HOST) ==
|
||
|
|
(ReportedModemStatus & MSVR1_HOST)) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Modem status unchanged 0x%x\n", PortP->ModemState);
|
||
|
|
/*
|
||
|
|
** Update ModemState just in case tbusy or tstop states have
|
||
|
|
** changed.
|
||
|
|
*/
|
||
|
|
PortP->ModemState = ReportedModemStatus;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Modem status change from 0x%x to 0x%x\n",
|
||
|
|
PortP->ModemState, ReportedModemStatus);
|
||
|
|
PortP->ModemState = ReportedModemStatus;
|
||
|
|
#ifdef MODEM_SUPPORT
|
||
|
|
if ( PortP->Mapped ) {
|
||
|
|
/***********************************************************\
|
||
|
|
*************************************************************
|
||
|
|
*** ***
|
||
|
|
*** M O D E M S T A T E C H A N G E ***
|
||
|
|
*** ***
|
||
|
|
*************************************************************
|
||
|
|
\***********************************************************/
|
||
|
|
/*
|
||
|
|
** If the device is a modem, then check the modem
|
||
|
|
** carrier.
|
||
|
|
*/
|
||
|
|
if (PortP->gs.tty == NULL)
|
||
|
|
break;
|
||
|
|
if (PortP->gs.tty->termios == NULL)
|
||
|
|
break;
|
||
|
|
|
||
|
|
if (!(PortP->gs.tty->termios->c_cflag & CLOCAL) &&
|
||
|
|
((PortP->State & (RIO_MOPEN|RIO_WOPEN)))) {
|
||
|
|
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Is there a Carrier?\n");
|
||
|
|
/*
|
||
|
|
** Is there a carrier?
|
||
|
|
*/
|
||
|
|
if ( PortP->ModemState & MSVR1_CD ) {
|
||
|
|
/*
|
||
|
|
** Has carrier just appeared?
|
||
|
|
*/
|
||
|
|
if (!(PortP->State & RIO_CARR_ON)) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Carrier just came up.\n");
|
||
|
|
PortP->State |= RIO_CARR_ON;
|
||
|
|
/*
|
||
|
|
** wakeup anyone in WOPEN
|
||
|
|
*/
|
||
|
|
if (PortP->State & (PORT_ISOPEN | RIO_WOPEN) )
|
||
|
|
wake_up_interruptible (&PortP->gs.open_wait);
|
||
|
|
#ifdef STATS
|
||
|
|
PortP->Stat.ModemOnCnt++;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
** Has carrier just dropped?
|
||
|
|
*/
|
||
|
|
if (PortP->State & RIO_CARR_ON) {
|
||
|
|
if (PortP->State & (PORT_ISOPEN|RIO_WOPEN|RIO_MOPEN))
|
||
|
|
tty_hangup (PortP->gs.tty);
|
||
|
|
PortP->State &= ~RIO_CARR_ON;
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Carrirer just went down\n");
|
||
|
|
#ifdef STATS
|
||
|
|
PortP->Stat.ModemOffCnt++;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Unknown command %d on CMD_RUP of host %d\n",
|
||
|
|
RBYTE(PktCmdP->Command),HostP-p->RIOHosts);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
rio_spin_unlock_irqrestore(&PortP->portSem, flags);
|
||
|
|
|
||
|
|
func_exit ();
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
** The command mechanism:
|
||
|
|
** Each rup has a chain of commands associated with it.
|
||
|
|
** This chain is maintained by routines in this file.
|
||
|
|
** Periodically we are called and we run a quick check of all the
|
||
|
|
** active chains to determine if there is a command to be executed,
|
||
|
|
** and if the rup is ready to accept it.
|
||
|
|
**
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Allocate an empty command block.
|
||
|
|
*/
|
||
|
|
struct CmdBlk *
|
||
|
|
RIOGetCmdBlk(void)
|
||
|
|
{
|
||
|
|
struct CmdBlk *CmdBlkP;
|
||
|
|
|
||
|
|
CmdBlkP = (struct CmdBlk *)sysbrk(sizeof(struct CmdBlk));
|
||
|
|
if (CmdBlkP)
|
||
|
|
bzero(CmdBlkP, sizeof(struct CmdBlk));
|
||
|
|
|
||
|
|
return CmdBlkP;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Return a block to the head of the free list.
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
RIOFreeCmdBlk(struct CmdBlk *CmdBlkP)
|
||
|
|
{
|
||
|
|
sysfree((void *)CmdBlkP, sizeof(struct CmdBlk));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** attach a command block to the list of commands to be performed for
|
||
|
|
** a given rup.
|
||
|
|
*/
|
||
|
|
int
|
||
|
|
RIOQueueCmdBlk(struct Host *HostP, uint Rup, struct CmdBlk *CmdBlkP)
|
||
|
|
{
|
||
|
|
struct CmdBlk **Base;
|
||
|
|
struct UnixRup *UnixRupP;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckHostP( HostP );
|
||
|
|
CheckRup( Rup );
|
||
|
|
CheckCmdBlkP( CmdBlkP );
|
||
|
|
#endif
|
||
|
|
if ( Rup >= (ushort)(MAX_RUP+LINKS_PER_UNIT) ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Illegal rup number %d in RIOQueueCmdBlk\n",Rup);
|
||
|
|
RIOFreeCmdBlk( CmdBlkP );
|
||
|
|
return RIO_FAIL;
|
||
|
|
}
|
||
|
|
|
||
|
|
UnixRupP = &HostP->UnixRups[Rup];
|
||
|
|
|
||
|
|
rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
|
||
|
|
|
||
|
|
/*
|
||
|
|
** If the RUP is currently inactive, then put the request
|
||
|
|
** straight on the RUP....
|
||
|
|
*/
|
||
|
|
if ( (UnixRupP->CmdsWaitingP == NULL) && (UnixRupP->CmdPendingP == NULL) &&
|
||
|
|
(RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE ) &&
|
||
|
|
(CmdBlkP->PreFuncP ? (*CmdBlkP->PreFuncP)(CmdBlkP->PreArg,CmdBlkP)
|
||
|
|
:TRUE)) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "RUP inactive-placing command straight on. Cmd byte is 0x%x\n",
|
||
|
|
CmdBlkP->Packet.data[0]);
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Whammy! blat that pack!
|
||
|
|
*/
|
||
|
|
HostP->Copy( (caddr_t)&CmdBlkP->Packet,
|
||
|
|
RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt ), sizeof(PKT) );
|
||
|
|
|
||
|
|
/*
|
||
|
|
** place command packet on the pending position.
|
||
|
|
*/
|
||
|
|
UnixRupP->CmdPendingP = CmdBlkP;
|
||
|
|
|
||
|
|
/*
|
||
|
|
** set the command register
|
||
|
|
*/
|
||
|
|
WWORD(UnixRupP->RupP->txcontrol , TX_PACKET_READY);
|
||
|
|
|
||
|
|
rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
|
||
|
|
|
||
|
|
return RIO_SUCCESS;
|
||
|
|
}
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "RUP active - en-queing\n");
|
||
|
|
|
||
|
|
if ( UnixRupP->CmdsWaitingP != NULL)
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Rup active - command waiting\n");
|
||
|
|
if ( UnixRupP->CmdPendingP != NULL )
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Rup active - command pending\n");
|
||
|
|
if ( RWORD(UnixRupP->RupP->txcontrol) != TX_RUP_INACTIVE )
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Rup active - command rup not ready\n");
|
||
|
|
|
||
|
|
Base = &UnixRupP->CmdsWaitingP;
|
||
|
|
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "First try to queue cmdblk 0x%x at 0x%x\n", (int)CmdBlkP,(int)Base);
|
||
|
|
|
||
|
|
while ( *Base ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Command cmdblk 0x%x here\n", (int)(*Base));
|
||
|
|
Base = &((*Base)->NextP);
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Now try to queue cmd cmdblk 0x%x at 0x%x\n",
|
||
|
|
(int)CmdBlkP,(int)Base);
|
||
|
|
}
|
||
|
|
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Will queue cmdblk 0x%x at 0x%x\n",(int)CmdBlkP,(int)Base);
|
||
|
|
|
||
|
|
*Base = CmdBlkP;
|
||
|
|
|
||
|
|
CmdBlkP->NextP = NULL;
|
||
|
|
|
||
|
|
rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
|
||
|
|
|
||
|
|
return RIO_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Here we go - if there is an empty rup, fill it!
|
||
|
|
** must be called at splrio() or higher.
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
RIOPollHostCommands(struct rio_info *p, struct Host *HostP)
|
||
|
|
{
|
||
|
|
register struct CmdBlk *CmdBlkP;
|
||
|
|
register struct UnixRup *UnixRupP;
|
||
|
|
struct PKT *PacketP;
|
||
|
|
ushort Rup;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
|
||
|
|
Rup = MAX_RUP+LINKS_PER_UNIT;
|
||
|
|
|
||
|
|
do { /* do this loop for each RUP */
|
||
|
|
/*
|
||
|
|
** locate the rup we are processing & lock it
|
||
|
|
*/
|
||
|
|
UnixRupP = &HostP->UnixRups[--Rup];
|
||
|
|
|
||
|
|
spin_lock_irqsave(&UnixRupP->RupLock, flags);
|
||
|
|
|
||
|
|
/*
|
||
|
|
** First check for incoming commands:
|
||
|
|
*/
|
||
|
|
if ( RWORD(UnixRupP->RupP->rxcontrol) != RX_RUP_INACTIVE ) {
|
||
|
|
int FreeMe;
|
||
|
|
|
||
|
|
PacketP =(PKT *)RIO_PTR(HostP->Caddr,RWORD(UnixRupP->RupP->rxpkt));
|
||
|
|
|
||
|
|
ShowPacket( DBG_CMD, PacketP );
|
||
|
|
|
||
|
|
switch ( RBYTE(PacketP->dest_port) ) {
|
||
|
|
case BOOT_RUP:
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Incoming Boot %s packet '%x'\n",
|
||
|
|
RBYTE(PacketP->len) & 0x80 ? "Command":"Data",
|
||
|
|
RBYTE(PacketP->data[0]));
|
||
|
|
rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
|
||
|
|
FreeMe= RIOBootRup(p, Rup,HostP,PacketP);
|
||
|
|
rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case COMMAND_RUP:
|
||
|
|
/*
|
||
|
|
** Free the RUP lock as loss of carrier causes a
|
||
|
|
** ttyflush which will (eventually) call another
|
||
|
|
** routine that uses the RUP lock.
|
||
|
|
*/
|
||
|
|
rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
|
||
|
|
FreeMe= RIOCommandRup(p, Rup,HostP,PacketP);
|
||
|
|
if (PacketP->data[5] == MEMDUMP) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Memdump from 0x%x complete\n",
|
||
|
|
*(ushort *) &(PacketP->data[6]));
|
||
|
|
HostP->Copy( (caddr_t)&(PacketP->data[8]),
|
||
|
|
(caddr_t)p->RIOMemDump, 32 );
|
||
|
|
}
|
||
|
|
rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ROUTE_RUP:
|
||
|
|
rio_spin_unlock_irqrestore( &UnixRupP->RupLock, flags);
|
||
|
|
FreeMe = RIORouteRup(p, Rup, HostP, PacketP );
|
||
|
|
rio_spin_lock_irqsave( &UnixRupP->RupLock, flags );
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Unknown RUP %d\n", RBYTE(PacketP->dest_port));
|
||
|
|
FreeMe = 1;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( FreeMe ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Free processed incoming command packet\n");
|
||
|
|
put_free_end(HostP,PacketP);
|
||
|
|
|
||
|
|
WWORD(UnixRupP->RupP->rxcontrol , RX_RUP_INACTIVE);
|
||
|
|
|
||
|
|
if ( RWORD(UnixRupP->RupP->handshake)==PHB_HANDSHAKE_SET ) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Handshake rup %d\n",Rup);
|
||
|
|
WWORD(UnixRupP->RupP->handshake,
|
||
|
|
PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** IF a command was running on the port,
|
||
|
|
** and it has completed, then tidy it up.
|
||
|
|
*/
|
||
|
|
if ( (CmdBlkP = UnixRupP->CmdPendingP) && /* ASSIGN! */
|
||
|
|
(RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
|
||
|
|
/*
|
||
|
|
** we are idle.
|
||
|
|
** there is a command in pending.
|
||
|
|
** Therefore, this command has finished.
|
||
|
|
** So, wakeup whoever is waiting for it (and tell them
|
||
|
|
** what happened).
|
||
|
|
*/
|
||
|
|
if ( CmdBlkP->Packet.dest_port == BOOT_RUP )
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Free Boot %s Command Block '%x'\n",
|
||
|
|
CmdBlkP->Packet.len & 0x80 ? "Command":"Data",
|
||
|
|
CmdBlkP->Packet.data[0]);
|
||
|
|
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Command 0x%x completed\n",(int)CmdBlkP);
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Clear the Rup lock to prevent mutual exclusion.
|
||
|
|
*/
|
||
|
|
if ( CmdBlkP->PostFuncP ) {
|
||
|
|
rio_spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
|
||
|
|
(*CmdBlkP->PostFuncP) (CmdBlkP->PostArg,CmdBlkP);
|
||
|
|
rio_spin_lock_irqsave(&UnixRupP->RupLock, flags);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** ....clear the pending flag....
|
||
|
|
*/
|
||
|
|
UnixRupP->CmdPendingP = NULL;
|
||
|
|
|
||
|
|
/*
|
||
|
|
** ....and return the command block to the freelist.
|
||
|
|
*/
|
||
|
|
RIOFreeCmdBlk( CmdBlkP );
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** If there is a command for this rup, and the rup
|
||
|
|
** is idle, then process the command
|
||
|
|
*/
|
||
|
|
if ( (CmdBlkP = UnixRupP->CmdsWaitingP) && /* ASSIGN! */
|
||
|
|
(UnixRupP->CmdPendingP == NULL) &&
|
||
|
|
(RWORD(UnixRupP->RupP->txcontrol) == TX_RUP_INACTIVE)) {
|
||
|
|
/*
|
||
|
|
** if the pre-function is non-zero, call it.
|
||
|
|
** If it returns RIO_FAIL then don't
|
||
|
|
** send this command yet!
|
||
|
|
*/
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckCmdBlkP (CmdBlkP);
|
||
|
|
#endif
|
||
|
|
if ( !(CmdBlkP->PreFuncP ?
|
||
|
|
(*CmdBlkP->PreFuncP)(CmdBlkP->PreArg, CmdBlkP) : TRUE)) {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Not ready to start command 0x%x\n",(int)CmdBlkP);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Start new command 0x%x Cmd byte is 0x%x\n",
|
||
|
|
(int)CmdBlkP, CmdBlkP->Packet.data[0]);
|
||
|
|
/*
|
||
|
|
** Whammy! blat that pack!
|
||
|
|
*/
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckPacketP ((PKT *)RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt));
|
||
|
|
#endif
|
||
|
|
HostP->Copy( (caddr_t)&CmdBlkP->Packet,
|
||
|
|
RIO_PTR(HostP->Caddr, UnixRupP->RupP->txpkt), sizeof(PKT));
|
||
|
|
|
||
|
|
/*
|
||
|
|
** remove the command from the rup command queue...
|
||
|
|
*/
|
||
|
|
UnixRupP->CmdsWaitingP = CmdBlkP->NextP;
|
||
|
|
|
||
|
|
/*
|
||
|
|
** ...and place it on the pending position.
|
||
|
|
*/
|
||
|
|
UnixRupP->CmdPendingP = CmdBlkP;
|
||
|
|
|
||
|
|
/*
|
||
|
|
** set the command register
|
||
|
|
*/
|
||
|
|
WWORD(UnixRupP->RupP->txcontrol,TX_PACKET_READY);
|
||
|
|
|
||
|
|
/*
|
||
|
|
** the command block will be freed
|
||
|
|
** when the command has been processed.
|
||
|
|
*/
|
||
|
|
}
|
||
|
|
}
|
||
|
|
spin_unlock_irqrestore(&UnixRupP->RupLock, flags);
|
||
|
|
} while ( Rup );
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
RIOWFlushMark(int iPortP, struct CmdBlk *CmdBlkP)
|
||
|
|
{
|
||
|
|
struct Port * PortP = (struct Port *)iPortP;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
rio_spin_lock_irqsave(&PortP->portSem, flags);
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckPortP( PortP );
|
||
|
|
#endif
|
||
|
|
PortP->WflushFlag++;
|
||
|
|
PortP->MagicFlags |= MAGIC_FLUSH;
|
||
|
|
rio_spin_unlock_irqrestore(&PortP->portSem, flags);
|
||
|
|
return RIOUnUse( iPortP, CmdBlkP );
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
RIORFlushEnable(int iPortP, struct CmdBlk *CmdBlkP)
|
||
|
|
{
|
||
|
|
struct Port * PortP = (struct Port *)iPortP;
|
||
|
|
PKT *PacketP;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
rio_spin_lock_irqsave(&PortP->portSem, flags);
|
||
|
|
|
||
|
|
while ( can_remove_receive(&PacketP, PortP) ) {
|
||
|
|
remove_receive(PortP);
|
||
|
|
ShowPacket(DBG_PROC, PacketP );
|
||
|
|
put_free_end( PortP->HostP, PacketP );
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( RWORD(PortP->PhbP->handshake)==PHB_HANDSHAKE_SET ) {
|
||
|
|
/*
|
||
|
|
** MAGIC! (Basically, handshake the RX buffer, so that
|
||
|
|
** the RTAs upstream can be re-enabled.)
|
||
|
|
*/
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Util: Set RX handshake bit\n");
|
||
|
|
WWORD(PortP->PhbP->handshake, PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET);
|
||
|
|
}
|
||
|
|
rio_spin_unlock_irqrestore(&PortP->portSem, flags);
|
||
|
|
return RIOUnUse( iPortP, CmdBlkP );
|
||
|
|
}
|
||
|
|
|
||
|
|
int
|
||
|
|
RIOUnUse(int iPortP, struct CmdBlk *CmdBlkP)
|
||
|
|
{
|
||
|
|
struct Port * PortP = (struct Port *)iPortP;
|
||
|
|
unsigned long flags;
|
||
|
|
|
||
|
|
rio_spin_lock_irqsave(&PortP->portSem, flags);
|
||
|
|
|
||
|
|
#ifdef CHECK
|
||
|
|
CheckPortP( PortP );
|
||
|
|
#endif
|
||
|
|
rio_dprintk (RIO_DEBUG_CMD, "Decrement in use count for port\n");
|
||
|
|
|
||
|
|
if (PortP->InUse) {
|
||
|
|
if ( --PortP->InUse != NOT_INUSE ) {
|
||
|
|
rio_spin_unlock_irqrestore(&PortP->portSem, flags);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
** While PortP->InUse is set (i.e. a preemptive command has been sent to
|
||
|
|
** the RTA and is awaiting completion), any transmit data is prevented from
|
||
|
|
** being transferred from the write queue into the transmit packets
|
||
|
|
** (add_transmit) and no furthur transmit interrupt will be sent for that
|
||
|
|
** data. The next interrupt will occur up to 500ms later (RIOIntr is called
|
||
|
|
** twice a second as a saftey measure). This was the case when kermit was
|
||
|
|
** used to send data into a RIO port. After each packet was sent, TCFLSH
|
||
|
|
** was called to flush the read queue preemptively. PortP->InUse was
|
||
|
|
** incremented, thereby blocking the 6 byte acknowledgement packet
|
||
|
|
** transmitted back. This acknowledgment hung around for 500ms before
|
||
|
|
** being sent, thus reducing input performance substantially!.
|
||
|
|
** When PortP->InUse becomes NOT_INUSE, we must ensure that any data
|
||
|
|
** hanging around in the transmit buffer is sent immediately.
|
||
|
|
*/
|
||
|
|
WWORD(PortP->HostP->ParmMapP->tx_intr, 1);
|
||
|
|
/* What to do here ..
|
||
|
|
wakeup( (caddr_t)&(PortP->InUse) );
|
||
|
|
*/
|
||
|
|
rio_spin_unlock_irqrestore(&PortP->portSem, flags);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void
|
||
|
|
ShowPacket(uint Flags, struct PKT *PacketP)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
**
|
||
|
|
** How to use this file:
|
||
|
|
**
|
||
|
|
** To send a command down a rup, you need to allocate a command block, fill
|
||
|
|
** in the packet information, fill in the command number, fill in the pre-
|
||
|
|
** and post- functions and arguments, and then add the command block to the
|
||
|
|
** queue of command blocks for the port in question. When the port is idle,
|
||
|
|
** then the pre-function will be called. If this returns RIO_FAIL then the
|
||
|
|
** command will be re-queued and tried again at a later date (probably in one
|
||
|
|
** clock tick). If the pre-function returns NOT RIO_FAIL, then the command
|
||
|
|
** packet will be queued on the RUP, and the txcontrol field set to the
|
||
|
|
** command number. When the txcontrol field has changed from being the
|
||
|
|
** command number, then the post-function will be called, with the argument
|
||
|
|
** specified earlier, a pointer to the command block, and the value of
|
||
|
|
** txcontrol.
|
||
|
|
**
|
||
|
|
** To allocate a command block, call RIOGetCmdBlk(). This returns a pointer
|
||
|
|
** to the command block structure allocated, or NULL if there aren't any.
|
||
|
|
** The block will have been zeroed for you.
|
||
|
|
**
|
||
|
|
** The structure has the following fields:
|
||
|
|
**
|
||
|
|
** struct CmdBlk
|
||
|
|
** {
|
||
|
|
** struct CmdBlk *NextP; ** Pointer to next command block **
|
||
|
|
** struct PKT Packet; ** A packet, to copy to the rup **
|
||
|
|
** int (*PreFuncP)(); ** The func to call to check if OK **
|
||
|
|
** int PreArg; ** The arg for the func **
|
||
|
|
** int (*PostFuncP)(); ** The func to call when completed **
|
||
|
|
** int PostArg; ** The arg for the func **
|
||
|
|
** };
|
||
|
|
**
|
||
|
|
** You need to fill in ALL fields EXCEPT NextP, which is used to link the
|
||
|
|
** blocks together either on the free list or on the Rup list.
|
||
|
|
**
|
||
|
|
** Packet is an actual packet structure to be filled in with the packet
|
||
|
|
** information associated with the command. You need to fill in everything,
|
||
|
|
** as the command processore doesn't process the command packet in any way.
|
||
|
|
**
|
||
|
|
** The PreFuncP is called before the packet is enqueued on the host rup.
|
||
|
|
** PreFuncP is called as (*PreFuncP)(PreArg, CmdBlkP);. PreFuncP must
|
||
|
|
** return !RIO_FAIL to have the packet queued on the rup, and RIO_FAIL
|
||
|
|
** if the packet is NOT to be queued.
|
||
|
|
**
|
||
|
|
** The PostFuncP is called when the command has completed. It is called
|
||
|
|
** as (*PostFuncP)(PostArg, CmdBlkP, txcontrol);. PostFuncP is not expected
|
||
|
|
** to return a value. PostFuncP does NOT need to free the command block,
|
||
|
|
** as this happens automatically after PostFuncP returns.
|
||
|
|
**
|
||
|
|
** Once the command block has been filled in, it is attached to the correct
|
||
|
|
** queue by calling RIOQueueCmdBlk( HostP, Rup, CmdBlkP ) where HostP is
|
||
|
|
** a pointer to the struct Host, Rup is the NUMBER of the rup (NOT a pointer
|
||
|
|
** to it!), and CmdBlkP is the pointer to the command block allocated using
|
||
|
|
** RIOGetCmdBlk().
|
||
|
|
**
|
||
|
|
*/
|