#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/tty.h>
+#include <linux/tty_flip.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/string.h>
#include "linux_compat.h"
#include "rio_linux.h"
-#include "typdef.h"
#include "pkt.h"
#include "daemon.h"
#include "rio.h"
#include "riospace.h"
-#include "top.h"
#include "cmdpkt.h"
#include "map.h"
-#include "riotypes.h"
#include "rup.h"
#include "port.h"
#include "riodrvr.h"
#include "unixrup.h"
#include "board.h"
#include "host.h"
-#include "error.h"
#include "phb.h"
#include "link.h"
#include "cmdblk.h"
#include "route.h"
-#include "control.h"
#include "cirrus.h"
#include "rioioctl.h"
static void RIOReceive(struct rio_info *, struct Port *);
-static char *firstchars (char *p, int nch)
+static char *firstchars(char *p, int nch)
{
- static char buf[2][128];
- static int t=0;
- t = ! t;
- memcpy (buf[t], p, nch);
- buf[t][nch] = 0;
- return buf[t];
+ static char buf[2][128];
+ static int t = 0;
+ t = !t;
+ memcpy(buf[t], p, nch);
+ buf[t][nch] = 0;
+ return buf[t];
}
#define INCR( P, I ) ((P) = (((P)+(I)) & p->RIOBufferMask))
/* Enable and start the transmission of packets */
-void
-RIOTxEnable(en)
-char * en;
+void RIOTxEnable(char *en)
{
- struct Port * PortP;
- struct rio_info *p;
- struct tty_struct* tty;
- int c;
- struct PKT * PacketP;
- unsigned long flags;
-
- PortP = (struct Port *)en;
- p = (struct rio_info *)PortP->p;
- tty = PortP->gs.tty;
-
-
- rio_dprintk (RIO_DEBUG_INTR, "tx port %d: %d chars queued.\n",
- PortP->PortNum, PortP->gs.xmit_cnt);
-
- if (!PortP->gs.xmit_cnt) return;
-
-
- /* This routine is an order of magnitude simpler than the specialix
- version. One of the disadvantages is that this version will send
- an incomplete packet (usually 64 bytes instead of 72) once for
- every 4k worth of data. Let's just say that this won't influence
- performance significantly..... */
-
- rio_spin_lock_irqsave(&PortP->portSem, flags);
-
- while (can_add_transmit( &PacketP, PortP )) {
- c = PortP->gs.xmit_cnt;
- if (c > PKT_MAX_DATA_LEN) c = PKT_MAX_DATA_LEN;
-
- /* Don't copy past the end of the source buffer */
- if (c > SERIAL_XMIT_SIZE - PortP->gs.xmit_tail)
- c = SERIAL_XMIT_SIZE - PortP->gs.xmit_tail;
-
- { int t;
- t = (c > 10)?10:c;
-
- rio_dprintk (RIO_DEBUG_INTR, "rio: tx port %d: copying %d chars: %s - %s\n",
- PortP->PortNum, c,
- firstchars (PortP->gs.xmit_buf + PortP->gs.xmit_tail , t),
- firstchars (PortP->gs.xmit_buf + PortP->gs.xmit_tail + c-t, t));
- }
- /* If for one reason or another, we can't copy more data,
- we're done! */
- if (c == 0) break;
-
- rio_memcpy_toio (PortP->HostP->Caddr, (caddr_t)PacketP->data,
- PortP->gs.xmit_buf + PortP->gs.xmit_tail, c);
- /* udelay (1); */
-
- writeb (c, &(PacketP->len));
- if (!( PortP->State & RIO_DELETED ) ) {
- add_transmit ( PortP );
- /*
- ** Count chars tx'd for port statistics reporting
- */
- if ( PortP->statsGather )
- PortP->txchars += c;
- }
- PortP->gs.xmit_tail = (PortP->gs.xmit_tail + c) & (SERIAL_XMIT_SIZE-1);
- PortP->gs.xmit_cnt -= c;
- }
-
- rio_spin_unlock_irqrestore(&PortP->portSem, flags);
-
- if (PortP->gs.xmit_cnt <= (PortP->gs.wakeup_chars + 2*PKT_MAX_DATA_LEN)) {
- rio_dprintk (RIO_DEBUG_INTR, "Waking up.... ldisc:%d (%d/%d)....",
- (int)(PortP->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)),
- PortP->gs.wakeup_chars, PortP->gs.xmit_cnt);
- if ((PortP->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- PortP->gs.tty->ldisc.write_wakeup)
- (PortP->gs.tty->ldisc.write_wakeup)(PortP->gs.tty);
- rio_dprintk (RIO_DEBUG_INTR, "(%d/%d)\n",
- PortP->gs.wakeup_chars, PortP->gs.xmit_cnt);
- wake_up_interruptible(&PortP->gs.tty->write_wait);
- }
+ struct Port *PortP;
+ struct rio_info *p;
+ struct tty_struct *tty;
+ int c;
+ struct PKT *PacketP;
+ unsigned long flags;
-}
+ PortP = (struct Port *) en;
+ p = (struct rio_info *) PortP->p;
+ tty = PortP->gs.tty;
-/*
-** RIO Host Service routine. Does all the work traditionally associated with an
-** interrupt.
-*/
-static int RupIntr;
-static int RxIntr;
-static int TxIntr;
-void
-RIOServiceHost(p, HostP, From)
-struct rio_info * p;
-struct Host *HostP;
-int From;
-{
- rio_spin_lock (&HostP->HostLock);
- if ( (HostP->Flags & RUN_STATE) != RC_RUNNING ) {
- static int t =0;
- rio_spin_unlock (&HostP->HostLock);
- if ((t++ % 200) == 0)
- rio_dprintk (RIO_DEBUG_INTR, "Interrupt but host not running. flags=%x.\n", (int)HostP->Flags);
- return;
- }
- rio_spin_unlock (&HostP->HostLock);
-
- if ( RWORD( HostP->ParmMapP->rup_intr ) ) {
- WWORD( HostP->ParmMapP->rup_intr , 0 );
- p->RIORupCount++;
- RupIntr++;
- rio_dprintk (RIO_DEBUG_INTR, "rio: RUP interrupt on host %d\n", HostP-p->RIOHosts);
- RIOPollHostCommands(p, HostP );
- }
-
- if ( RWORD( HostP->ParmMapP->rx_intr ) ) {
- int port;
-
- WWORD( HostP->ParmMapP->rx_intr , 0 );
- p->RIORxCount++;
- RxIntr++;
-
- rio_dprintk (RIO_DEBUG_INTR, "rio: RX interrupt on host %d\n", HostP-p->RIOHosts);
- /*
- ** Loop through every port. If the port is mapped into
- ** the system ( i.e. has /dev/ttyXXXX associated ) then it is
- ** worth checking. If the port isn't open, grab any packets
- ** hanging on its receive queue and stuff them on the free
- ** list; check for commands on the way.
- */
- for ( port=p->RIOFirstPortsBooted;
- port<p->RIOLastPortsBooted+PORTS_PER_RTA; port++ ) {
- struct Port *PortP = p->RIOPortp[port];
- struct tty_struct *ttyP;
- struct PKT *PacketP;
-
- /*
- ** not mapped in - most of the RIOPortp[] information
- ** has not been set up!
- ** Optimise: ports come in bundles of eight.
- */
- if ( !PortP->Mapped ) {
- port += 7;
- continue; /* with the next port */
- }
-
- /*
- ** If the host board isn't THIS host board, check the next one.
- ** optimise: ports come in bundles of eight.
- */
- if ( PortP->HostP != HostP ) {
- port += 7;
- continue;
- }
-
- /*
- ** Let us see - is the port open? If not, then don't service it.
- */
- if ( !( PortP->PortState & PORT_ISOPEN ) ) {
- continue;
- }
-
- /*
- ** find corresponding tty structure. The process of mapping
- ** the ports puts these here.
- */
- ttyP = PortP->gs.tty;
-
- /*
- ** Lock the port before we begin working on it.
- */
- rio_spin_lock(&PortP->portSem);
-
- /*
- ** Process received data if there is any.
- */
- if ( can_remove_receive( &PacketP, PortP ) )
- RIOReceive(p, PortP);
-
- /*
- ** If there is no data left to be read from the port, and
- ** it's handshake bit is set, then we must clear the handshake,
- ** so that that downstream RTA is re-enabled.
- */
- if ( !can_remove_receive( &PacketP, PortP ) &&
- ( 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_INTR, "Set RX handshake bit\n");
- WWORD( PortP->PhbP->handshake,
- PHB_HANDSHAKE_SET|PHB_HANDSHAKE_RESET );
- }
- rio_spin_unlock(&PortP->portSem);
- }
- }
-
- if ( RWORD( HostP->ParmMapP->tx_intr ) ) {
- int port;
-
- WWORD( HostP->ParmMapP->tx_intr , 0);
-
- p->RIOTxCount++;
- TxIntr++;
- rio_dprintk (RIO_DEBUG_INTR, "rio: TX interrupt on host %d\n", HostP-p->RIOHosts);
-
- /*
- ** Loop through every port.
- ** If the port is mapped into the system ( i.e. has /dev/ttyXXXX
- ** associated ) then it is worth checking.
- */
- for ( port=p->RIOFirstPortsBooted;
- port<p->RIOLastPortsBooted+PORTS_PER_RTA; port++ ) {
- struct Port *PortP = p->RIOPortp[port];
- struct tty_struct *ttyP;
- struct PKT *PacketP;
-
- /*
- ** not mapped in - most of the RIOPortp[] information
- ** has not been set up!
- */
- if ( !PortP->Mapped ) {
- port += 7;
- continue; /* with the next port */
- }
-
- /*
- ** If the host board isn't running, then its data structures
- ** are no use to us - continue quietly.
- */
- if ( PortP->HostP != HostP ) {
- port += 7;
- continue; /* with the next port */
- }
-
- /*
- ** Let us see - is the port open? If not, then don't service it.
- */
- if ( !( PortP->PortState & PORT_ISOPEN ) ) {
- continue;
- }
-
- rio_dprintk (RIO_DEBUG_INTR, "rio: Looking into port %d.\n", port);
- /*
- ** Lock the port before we begin working on it.
- */
- rio_spin_lock(&PortP->portSem);
-
- /*
- ** If we can't add anything to the transmit queue, then
- ** we need do none of this processing.
- */
- if ( !can_add_transmit( &PacketP, PortP ) ) {
- rio_dprintk (RIO_DEBUG_INTR, "Can't add to port, so skipping.\n");
- rio_spin_unlock(&PortP->portSem);
- continue;
- }
-
- /*
- ** find corresponding tty structure. The process of mapping
- ** the ports puts these here.
- */
- ttyP = PortP->gs.tty;
- /* If ttyP is NULL, the port is getting closed. Forget about it. */
- if (!ttyP) {
- rio_dprintk (RIO_DEBUG_INTR, "no tty, so skipping.\n");
- rio_spin_unlock(&PortP->portSem);
- continue;
- }
- /*
- ** If there is more room available we start up the transmit
- ** data process again. This can be direct I/O, if the cookmode
- ** is set to COOK_RAW or COOK_MEDIUM, or will be a call to the
- ** riotproc( T_OUTPUT ) if we are in COOK_WELL mode, to fetch
- ** characters via the line discipline. We must always call
- ** the line discipline,
- ** so that user input characters can be echoed correctly.
- **
- ** ++++ Update +++++
- ** With the advent of double buffering, we now see if
- ** TxBufferOut-In is non-zero. If so, then we copy a packet
- ** to the output place, and set it going. If this empties
- ** the buffer, then we must issue a wakeup( ) on OUT.
- ** If it frees space in the buffer then we must issue
- ** a wakeup( ) on IN.
- **
- ** ++++ Extra! Extra! If PortP->WflushFlag is set, then we
- ** have to send a WFLUSH command down the PHB, to mark the
- ** end point of a WFLUSH. We also need to clear out any
- ** data from the double buffer! ( note that WflushFlag is a
- ** *count* of the number of WFLUSH commands outstanding! )
- **
- ** ++++ And there's more!
- ** If an RTA is powered off, then on again, and rebooted,
- ** whilst it has ports open, then we need to re-open the ports.
- ** ( reasonable enough ). We can't do this when we spot the
- ** re-boot, in interrupt time, because the queue is probably
- ** full. So, when we come in here, we need to test if any
- ** ports are in this condition, and re-open the port before
- ** we try to send any more data to it. Now, the re-booted
- ** RTA will be discarding packets from the PHB until it
- ** receives this open packet, but don't worry tooo much
- ** about that. The one thing that is interesting is the
- ** combination of this effect and the WFLUSH effect!
- */
- /* For now don't handle RTA reboots. -- REW.
- Reenabled. Otherwise RTA reboots didn't work. Duh. -- REW */
- if ( PortP->MagicFlags ) {
-#if 1
- if ( PortP->MagicFlags & MAGIC_REBOOT ) {
- /*
- ** well, the RTA has been rebooted, and there is room
- ** on its queue to add the open packet that is required.
- **
- ** The messy part of this line is trying to decide if
- ** we need to call the Param function as a tty or as
- ** a modem.
- ** DONT USE CLOCAL AS A TEST FOR THIS!
- **
- ** If we can't param the port, then move on to the
- ** next port.
- */
- PortP->InUse = NOT_INUSE;
-
- rio_spin_unlock(&PortP->portSem);
- if ( RIOParam(PortP, OPEN, ((PortP->Cor2Copy &
- (COR2_RTSFLOW|COR2_CTSFLOW ) )==
- (COR2_RTSFLOW|COR2_CTSFLOW ) ) ?
- TRUE : FALSE, DONT_SLEEP ) == RIO_FAIL ) {
- continue; /* with next port */
- }
- rio_spin_lock(&PortP->portSem);
- PortP->MagicFlags &= ~MAGIC_REBOOT;
- }
-#endif
+ rio_dprintk(RIO_DEBUG_INTR, "tx port %d: %d chars queued.\n", PortP->PortNum, PortP->gs.xmit_cnt);
- /*
- ** As mentioned above, this is a tacky hack to cope
- ** with WFLUSH
- */
- if ( PortP->WflushFlag ) {
- rio_dprintk (RIO_DEBUG_INTR, "Want to WFLUSH mark this port\n");
-
- if ( PortP->InUse )
- rio_dprintk (RIO_DEBUG_INTR, "FAILS - PORT IS IN USE\n");
- }
-
- while ( PortP->WflushFlag &&
- can_add_transmit( &PacketP, PortP ) &&
- ( PortP->InUse == NOT_INUSE ) ) {
- int p;
- struct PktCmd *PktCmdP;
-
- rio_dprintk (RIO_DEBUG_INTR, "Add WFLUSH marker to data queue\n");
- /*
- ** make it look just like a WFLUSH command
- */
- PktCmdP = ( struct PktCmd * )&PacketP->data[0];
-
- WBYTE( PktCmdP->Command , WFLUSH );
-
- p = PortP->HostPort % ( ushort )PORTS_PER_RTA;
-
- /*
- ** If second block of ports for 16 port RTA, add 8
- ** to index 8-15.
- */
- if ( PortP->SecondBlock )
- p += PORTS_PER_RTA;
-
- WBYTE( PktCmdP->PhbNum, p );
-
- /*
- ** to make debuggery easier
- */
- WBYTE( PacketP->data[ 2], 'W' );
- WBYTE( PacketP->data[ 3], 'F' );
- WBYTE( PacketP->data[ 4], 'L' );
- WBYTE( PacketP->data[ 5], 'U' );
- WBYTE( PacketP->data[ 6], 'S' );
- WBYTE( PacketP->data[ 7], 'H' );
- WBYTE( PacketP->data[ 8], ' ' );
- WBYTE( PacketP->data[ 9], '0'+PortP->WflushFlag );
- WBYTE( PacketP->data[10], ' ' );
- WBYTE( PacketP->data[11], ' ' );
- WBYTE( PacketP->data[12], '\0' );
-
- /*
- ** its two bytes long!
- */
- WBYTE( PacketP->len , PKT_CMD_BIT | 2 );
-
- /*
- ** queue it!
- */
- if ( !( PortP->State & RIO_DELETED ) ) {
- add_transmit( PortP );
- /*
- ** Count chars tx'd for port statistics reporting
- */
- if ( PortP->statsGather )
- PortP->txchars += 2;
- }
-
- if ( --( PortP->WflushFlag ) == 0 ) {
- PortP->MagicFlags &= ~MAGIC_FLUSH;
- }
-
- rio_dprintk (RIO_DEBUG_INTR, "Wflush count now stands at %d\n",
- PortP->WflushFlag);
+ if (!PortP->gs.xmit_cnt)
+ return;
+
+
+ /* This routine is an order of magnitude simpler than the specialix
+ version. One of the disadvantages is that this version will send
+ an incomplete packet (usually 64 bytes instead of 72) once for
+ every 4k worth of data. Let's just say that this won't influence
+ performance significantly..... */
+
+ rio_spin_lock_irqsave(&PortP->portSem, flags);
+
+ while (can_add_transmit(&PacketP, PortP)) {
+ c = PortP->gs.xmit_cnt;
+ if (c > PKT_MAX_DATA_LEN)
+ c = PKT_MAX_DATA_LEN;
+
+ /* Don't copy past the end of the source buffer */
+ if (c > SERIAL_XMIT_SIZE - PortP->gs.xmit_tail)
+ c = SERIAL_XMIT_SIZE - PortP->gs.xmit_tail;
+
+ {
+ int t;
+ t = (c > 10) ? 10 : c;
+
+ rio_dprintk(RIO_DEBUG_INTR, "rio: tx port %d: copying %d chars: %s - %s\n", PortP->PortNum, c, firstchars(PortP->gs.xmit_buf + PortP->gs.xmit_tail, t), firstchars(PortP->gs.xmit_buf + PortP->gs.xmit_tail + c - t, t));
+ }
+ /* If for one reason or another, we can't copy more data,
+ we're done! */
+ if (c == 0)
+ break;
+
+ rio_memcpy_toio(PortP->HostP->Caddr, (caddr_t) PacketP->data, PortP->gs.xmit_buf + PortP->gs.xmit_tail, c);
+ /* udelay (1); */
+
+ writeb(c, &(PacketP->len));
+ if (!(PortP->State & RIO_DELETED)) {
+ add_transmit(PortP);
+ /*
+ ** Count chars tx'd for port statistics reporting
+ */
+ if (PortP->statsGather)
+ PortP->txchars += c;
+ }
+ PortP->gs.xmit_tail = (PortP->gs.xmit_tail + c) & (SERIAL_XMIT_SIZE - 1);
+ PortP->gs.xmit_cnt -= c;
}
- if ( PortP->MagicFlags & MORE_OUTPUT_EYGOR ) {
- if ( PortP->MagicFlags & MAGIC_FLUSH ) {
- PortP->MagicFlags |= MORE_OUTPUT_EYGOR;
- }
- else {
- if ( !can_add_transmit( &PacketP, PortP ) ) {
- rio_spin_unlock(&PortP->portSem);
- continue;
- }
- rio_spin_unlock(&PortP->portSem);
- RIOTxEnable((char *)PortP);
- rio_spin_lock(&PortP->portSem);
- PortP->MagicFlags &= ~MORE_OUTPUT_EYGOR;
- }
+
+ rio_spin_unlock_irqrestore(&PortP->portSem, flags);
+
+ if (PortP->gs.xmit_cnt <= (PortP->gs.wakeup_chars + 2 * PKT_MAX_DATA_LEN)) {
+ rio_dprintk(RIO_DEBUG_INTR, "Waking up.... ldisc:%d (%d/%d)....", (int) (PortP->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)), PortP->gs.wakeup_chars, PortP->gs.xmit_cnt);
+ if ((PortP->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && PortP->gs.tty->ldisc.write_wakeup)
+ (PortP->gs.tty->ldisc.write_wakeup) (PortP->gs.tty);
+ rio_dprintk(RIO_DEBUG_INTR, "(%d/%d)\n", PortP->gs.wakeup_chars, PortP->gs.xmit_cnt);
+ wake_up_interruptible(&PortP->gs.tty->write_wait);
}
- }
-
-
- /*
- ** If we can't add anything to the transmit queue, then
- ** we need do none of the remaining processing.
- */
- if (!can_add_transmit( &PacketP, PortP ) ) {
- rio_spin_unlock(&PortP->portSem);
- continue;
- }
-
- rio_spin_unlock(&PortP->portSem);
- RIOTxEnable((char *)PortP);
- }
- }
+
}
+
/*
-** Routine for handling received data for clist drivers.
-** NB: Called with the tty locked. The spl from the lockb( ) is passed.
-** we return the ttySpl level that we re-locked at.
+** RIO Host Service routine. Does all the work traditionally associated with an
+** interrupt.
*/
-static void
-RIOReceive(p, PortP)
-struct rio_info * p;
-struct Port * PortP;
+static int RupIntr;
+static int RxIntr;
+static int TxIntr;
+
+void RIOServiceHost(struct rio_info *p, struct Host *HostP, int From)
{
- struct tty_struct *TtyP;
- register ushort transCount;
- struct PKT *PacketP;
- register uint DataCnt;
- uchar * ptr;
- int copied =0;
-
- static int intCount, RxIntCnt;
-
- /*
- ** The receive data process is to remove packets from the
- ** PHB until there aren't any more or the current cblock
- ** is full. When this occurs, there will be some left over
- ** data in the packet, that we must do something with.
- ** As we haven't unhooked the packet from the read list
- ** yet, we can just leave the packet there, having first
- ** made a note of how far we got. This means that we need
- ** a pointer per port saying where we start taking the
- ** data from - this will normally be zero, but when we
- ** run out of space it will be set to the offset of the
- ** next byte to copy from the packet data area. The packet
- ** length field is decremented by the number of bytes that
- ** we succesfully removed from the packet. When this reaches
- ** zero, we reset the offset pointer to be zero, and free
- ** the packet from the front of the queue.
- */
-
- intCount++;
-
- TtyP = PortP->gs.tty;
- if (!TtyP) {
- rio_dprintk (RIO_DEBUG_INTR, "RIOReceive: tty is null. \n");
- return;
- }
-
- if (PortP->State & RIO_THROTTLE_RX) {
- rio_dprintk (RIO_DEBUG_INTR, "RIOReceive: Throttled. Can't handle more input.\n");
- return;
- }
-
- if ( PortP->State & RIO_DELETED )
- {
- while ( can_remove_receive( &PacketP, PortP ) )
- {
- remove_receive( PortP );
- put_free_end( PortP->HostP, PacketP );
+ rio_spin_lock(&HostP->HostLock);
+ if ((HostP->Flags & RUN_STATE) != RC_RUNNING) {
+ static int t = 0;
+ rio_spin_unlock(&HostP->HostLock);
+ if ((t++ % 200) == 0)
+ rio_dprintk(RIO_DEBUG_INTR, "Interrupt but host not running. flags=%x.\n", (int) HostP->Flags);
+ return;
+ }
+ rio_spin_unlock(&HostP->HostLock);
+
+ if (readw(&HostP->ParmMapP->rup_intr)) {
+ writew(0, &HostP->ParmMapP->rup_intr);
+ p->RIORupCount++;
+ RupIntr++;
+ rio_dprintk(RIO_DEBUG_INTR, "rio: RUP interrupt on host %Zd\n", HostP - p->RIOHosts);
+ RIOPollHostCommands(p, HostP);
}
- }
- else
- {
- /*
- ** loop, just so long as:
- ** i ) there's some data ( i.e. can_remove_receive )
- ** ii ) we haven't been blocked
- ** iii ) there's somewhere to put the data
- ** iv ) we haven't outstayed our welcome
- */
- transCount = 1;
- while ( can_remove_receive(&PacketP, PortP)
- && transCount)
- {
-#ifdef STATS
- PortP->Stat.RxIntCnt++;
-#endif /* STATS */
- RxIntCnt++;
-
- /*
- ** check that it is not a command!
- */
- if ( PacketP->len & PKT_CMD_BIT ) {
- rio_dprintk (RIO_DEBUG_INTR, "RIO: unexpected command packet received on PHB\n");
- /* rio_dprint(RIO_DEBUG_INTR, (" sysport = %d\n", p->RIOPortp->PortNum)); */
- rio_dprintk (RIO_DEBUG_INTR, " dest_unit = %d\n", PacketP->dest_unit);
- rio_dprintk (RIO_DEBUG_INTR, " dest_port = %d\n", PacketP->dest_port);
- rio_dprintk (RIO_DEBUG_INTR, " src_unit = %d\n", PacketP->src_unit);
- rio_dprintk (RIO_DEBUG_INTR, " src_port = %d\n", PacketP->src_port);
- rio_dprintk (RIO_DEBUG_INTR, " len = %d\n", PacketP->len);
- rio_dprintk (RIO_DEBUG_INTR, " control = %d\n", PacketP->control);
- rio_dprintk (RIO_DEBUG_INTR, " csum = %d\n", PacketP->csum);
- rio_dprintk (RIO_DEBUG_INTR, " data bytes: ");
- for ( DataCnt=0; DataCnt<PKT_MAX_DATA_LEN; DataCnt++ )
- rio_dprintk (RIO_DEBUG_INTR, "%d\n", PacketP->data[DataCnt]);
- remove_receive( PortP );
- put_free_end( PortP->HostP, PacketP );
- continue; /* with next packet */
- }
-
- /*
- ** How many characters can we move 'upstream' ?
- **
- ** Determine the minimum of the amount of data
- ** available and the amount of space in which to
- ** put it.
- **
- ** 1. Get the packet length by masking 'len'
- ** for only the length bits.
- ** 2. Available space is [buffer size] - [space used]
- **
- ** Transfer count is the minimum of packet length
- ** and available space.
- */
-
- transCount = min_t(unsigned int, PacketP->len & PKT_LEN_MASK,
- TTY_FLIPBUF_SIZE - TtyP->flip.count);
- rio_dprintk (RIO_DEBUG_REC, "port %d: Copy %d bytes\n",
- PortP->PortNum, transCount);
- /*
- ** To use the following 'kkprintfs' for debugging - change the '#undef'
- ** to '#define', (this is the only place ___DEBUG_IT___ occurs in the
- ** driver).
- */
-#undef ___DEBUG_IT___
-#ifdef ___DEBUG_IT___
- kkprintf("I:%d R:%d P:%d Q:%d C:%d F:%x ",
- intCount,
- RxIntCnt,
- PortP->PortNum,
- TtyP->rxqueue.count,
- transCount,
- TtyP->flags );
-#endif
- ptr = (uchar *) PacketP->data + PortP->RxDataStart;
- rio_memcpy_fromio (TtyP->flip.char_buf_ptr, ptr, transCount);
- memset(TtyP->flip.flag_buf_ptr, TTY_NORMAL, transCount);
+ if (readw(&HostP->ParmMapP->rx_intr)) {
+ int port;
+
+ writew(0, &HostP->ParmMapP->rx_intr);
+ p->RIORxCount++;
+ RxIntr++;
+
+ rio_dprintk(RIO_DEBUG_INTR, "rio: RX interrupt on host %Zd\n", HostP - p->RIOHosts);
+ /*
+ ** Loop through every port. If the port is mapped into
+ ** the system ( i.e. has /dev/ttyXXXX associated ) then it is
+ ** worth checking. If the port isn't open, grab any packets
+ ** hanging on its receive queue and stuff them on the free
+ ** list; check for commands on the way.
+ */
+ for (port = p->RIOFirstPortsBooted; port < p->RIOLastPortsBooted + PORTS_PER_RTA; port++) {
+ struct Port *PortP = p->RIOPortp[port];
+ struct tty_struct *ttyP;
+ struct PKT *PacketP;
-#ifdef STATS
- /*
- ** keep a count for statistical purposes
- */
- PortP->Stat.RxCharCnt += transCount;
-#endif
- PortP->RxDataStart += transCount;
- PacketP->len -= transCount;
- copied += transCount;
- TtyP->flip.count += transCount;
- TtyP->flip.char_buf_ptr += transCount;
- TtyP->flip.flag_buf_ptr += transCount;
+ /*
+ ** not mapped in - most of the RIOPortp[] information
+ ** has not been set up!
+ ** Optimise: ports come in bundles of eight.
+ */
+ if (!PortP->Mapped) {
+ port += 7;
+ continue; /* with the next port */
+ }
+ /*
+ ** If the host board isn't THIS host board, check the next one.
+ ** optimise: ports come in bundles of eight.
+ */
+ if (PortP->HostP != HostP) {
+ port += 7;
+ continue;
+ }
-#ifdef ___DEBUG_IT___
- kkprintf("T:%d L:%d\n", DataCnt, PacketP->len );
-#endif
+ /*
+ ** Let us see - is the port open? If not, then don't service it.
+ */
+ if (!(PortP->PortState & PORT_ISOPEN)) {
+ continue;
+ }
- if ( PacketP->len == 0 )
- {
- /*
- ** If we have emptied the packet, then we can
- ** free it, and reset the start pointer for
- ** the next packet.
- */
- remove_receive( PortP );
- put_free_end( PortP->HostP, PacketP );
- PortP->RxDataStart = 0;
-#ifdef STATS
+ /*
+ ** find corresponding tty structure. The process of mapping
+ ** the ports puts these here.
+ */
+ ttyP = PortP->gs.tty;
+
+ /*
+ ** Lock the port before we begin working on it.
+ */
+ rio_spin_lock(&PortP->portSem);
+
+ /*
+ ** Process received data if there is any.
+ */
+ if (can_remove_receive(&PacketP, PortP))
+ RIOReceive(p, PortP);
+
+ /*
+ ** If there is no data left to be read from the port, and
+ ** it's handshake bit is set, then we must clear the handshake,
+ ** so that that downstream RTA is re-enabled.
+ */
+ if (!can_remove_receive(&PacketP, PortP) && (readw(&PortP->PhbP->handshake) == PHB_HANDSHAKE_SET)) {
/*
- ** more lies ( oops, I mean statistics )
- */
- PortP->Stat.RxPktCnt++;
-#endif /* STATS */
- }
+ ** MAGIC! ( Basically, handshake the RX buffer, so that
+ ** the RTAs upstream can be re-enabled. )
+ */
+ rio_dprintk(RIO_DEBUG_INTR, "Set RX handshake bit\n");
+ writew(PHB_HANDSHAKE_SET | PHB_HANDSHAKE_RESET, &PortP->PhbP->handshake);
+ }
+ rio_spin_unlock(&PortP->portSem);
+ }
}
- }
- if (copied) {
- rio_dprintk (RIO_DEBUG_REC, "port %d: pushing tty flip buffer: %d total bytes copied.\n", PortP->PortNum, copied);
- tty_flip_buffer_push (TtyP);
- }
- return;
-}
+ if (readw(&HostP->ParmMapP->tx_intr)) {
+ int port;
-#ifdef FUTURE_RELEASE
-/*
-** The proc routine called by the line discipline to do the work for it.
-** The proc routine works hand in hand with the interrupt routine.
-*/
-int
-riotproc(p, tp, cmd, port)
-struct rio_info * p;
-register struct ttystatics *tp;
-int cmd;
-int port;
-{
- register struct Port *PortP;
- int SysPort;
- struct PKT *PacketP;
+ writew(0, &HostP->ParmMapP->tx_intr);
- SysPort = port; /* Believe me, it works. */
+ p->RIOTxCount++;
+ TxIntr++;
+ rio_dprintk(RIO_DEBUG_INTR, "rio: TX interrupt on host %Zd\n", HostP - p->RIOHosts);
- if ( SysPort < 0 || SysPort >= RIO_PORTS ) {
- rio_dprintk (RIO_DEBUG_INTR, "Illegal port %d derived from TTY in riotproc()\n",SysPort);
- return 0;
- }
- PortP = p->RIOPortp[SysPort];
-
- if ((uint)PortP->PhbP < (uint)PortP->Caddr ||
- (uint)PortP->PhbP >= (uint)PortP->Caddr+SIXTY_FOUR_K ) {
- rio_dprintk (RIO_DEBUG_INTR, "RIO: NULL or BAD PhbP on sys port %d in proc routine\n",
- SysPort);
- rio_dprintk (RIO_DEBUG_INTR, " PortP = 0x%x\n",PortP);
- rio_dprintk (RIO_DEBUG_INTR, " PortP->PhbP = 0x%x\n",PortP->PhbP);
- rio_dprintk (RIO_DEBUG_INTR, " PortP->Caddr = 0x%x\n",PortP->PhbP);
- rio_dprintk (RIO_DEBUG_INTR, " PortP->HostPort = 0x%x\n",PortP->HostPort);
- return 0;
- }
+ /*
+ ** Loop through every port.
+ ** If the port is mapped into the system ( i.e. has /dev/ttyXXXX
+ ** associated ) then it is worth checking.
+ */
+ for (port = p->RIOFirstPortsBooted; port < p->RIOLastPortsBooted + PORTS_PER_RTA; port++) {
+ struct Port *PortP = p->RIOPortp[port];
+ struct tty_struct *ttyP;
+ struct PKT *PacketP;
- switch(cmd) {
- case T_WFLUSH:
- rio_dprintk (RIO_DEBUG_INTR, "T_WFLUSH\n");
/*
- ** Because of the spooky way the RIO works, we don't need
- ** to issue a flush command on any of the SET*F commands,
- ** as that causes trouble with getty and login, which issue
- ** these commands to incur a READ flush, and rely on the fact
- ** that the line discipline does a wait for drain for them.
- ** As the rio doesn't wait for drain, the write flush would
- ** destroy the Password: prompt. This isn't very friendly, so
- ** here we only issue a WFLUSH command if we are in the interrupt
- ** routine, or we aren't executing a SET*F command.
- */
- if ( PortP->HostP->InIntr || !PortP->FlushCmdBodge ) {
- /*
- ** form a wflush packet - 1 byte long, no data
- */
- if ( PortP->State & RIO_DELETED ) {
- rio_dprintk (RIO_DEBUG_INTR, "WFLUSH on deleted RTA\n");
- }
- else {
- if ( RIOPreemptiveCmd(p, PortP, WFLUSH ) == RIO_FAIL ) {
- rio_dprintk (RIO_DEBUG_INTR, "T_WFLUSH Command failed\n");
- }
- else
- rio_dprintk (RIO_DEBUG_INTR, "T_WFLUSH Command\n");
- }
- /*
- ** WFLUSH operation - flush the data!
- */
- PortP->TxBufferIn = PortP->TxBufferOut = 0;
- }
- else {
- rio_dprintk (RIO_DEBUG_INTR, "T_WFLUSH Command ignored\n");
+ ** not mapped in - most of the RIOPortp[] information
+ ** has not been set up!
+ */
+ if (!PortP->Mapped) {
+ port += 7;
+ continue; /* with the next port */
}
+
/*
- ** sort out the line discipline
- */
- if (PortP->CookMode == COOK_WELL)
- goto start;
- break;
-
- case T_RESUME:
- rio_dprintk (RIO_DEBUG_INTR, "T_RESUME\n");
- /*
- ** send pre-emptive resume packet
- */
- if ( PortP->State & RIO_DELETED ) {
- rio_dprintk (RIO_DEBUG_INTR, "RESUME on deleted RTA\n");
- }
- else {
- if ( RIOPreemptiveCmd(p, PortP, RESUME ) == RIO_FAIL ) {
- rio_dprintk (RIO_DEBUG_INTR, "T_RESUME Command failed\n");
- }
+ ** If the host board isn't running, then its data structures
+ ** are no use to us - continue quietly.
+ */
+ if (PortP->HostP != HostP) {
+ port += 7;
+ continue; /* with the next port */
}
+
/*
- ** and re-start the sender software!
- */
- if (PortP->CookMode == COOK_WELL)
- goto start;
- break;
-
- case T_TIME:
- rio_dprintk (RIO_DEBUG_INTR, "T_TIME\n");
+ ** Let us see - is the port open? If not, then don't service it.
+ */
+ if (!(PortP->PortState & PORT_ISOPEN)) {
+ continue;
+ }
+
+ rio_dprintk(RIO_DEBUG_INTR, "rio: Looking into port %d.\n", port);
/*
- ** T_TIME is called when xDLY is set in oflags and
- ** the line discipline timeout has expired. It's
- ** function in life is to clear the TIMEOUT flag
- ** and to re-start output to the port.
- */
+ ** Lock the port before we begin working on it.
+ */
+ rio_spin_lock(&PortP->portSem);
+
/*
- ** Fall through and re-start output
- */
- case T_OUTPUT:
-start:
- if ( PortP->MagicFlags & MAGIC_FLUSH ) {
- PortP->MagicFlags |= MORE_OUTPUT_EYGOR;
- return 0;
+ ** If we can't add anything to the transmit queue, then
+ ** we need do none of this processing.
+ */
+ if (!can_add_transmit(&PacketP, PortP)) {
+ rio_dprintk(RIO_DEBUG_INTR, "Can't add to port, so skipping.\n");
+ rio_spin_unlock(&PortP->portSem);
+ continue;
}
- RIOTxEnable((char *)PortP);
- PortP->MagicFlags &= ~MORE_OUTPUT_EYGOR;
- /*rio_dprint(RIO_DEBUG_INTR, PortP,DBG_PROC,"T_OUTPUT finished\n");*/
- break;
-
- case T_SUSPEND:
- rio_dprintk (RIO_DEBUG_INTR, "T_SUSPEND\n");
+
/*
- ** send a suspend pre-emptive packet.
- */
- if ( PortP->State & RIO_DELETED ) {
- rio_dprintk (RIO_DEBUG_INTR, "SUSPEND deleted RTA\n");
- }
- else {
- if ( RIOPreemptiveCmd(p, PortP, SUSPEND ) == RIO_FAIL ) {
- rio_dprintk (RIO_DEBUG_INTR, "T_SUSPEND Command failed\n");
- }
+ ** find corresponding tty structure. The process of mapping
+ ** the ports puts these here.
+ */
+ ttyP = PortP->gs.tty;
+ /* If ttyP is NULL, the port is getting closed. Forget about it. */
+ if (!ttyP) {
+ rio_dprintk(RIO_DEBUG_INTR, "no tty, so skipping.\n");
+ rio_spin_unlock(&PortP->portSem);
+ continue;
}
/*
- ** done!
- */
- break;
-
- case T_BLOCK:
- rio_dprintk (RIO_DEBUG_INTR, "T_BLOCK\n");
- break;
-
- case T_RFLUSH:
- rio_dprintk (RIO_DEBUG_INTR, "T_RFLUSH\n");
- if ( PortP->State & RIO_DELETED ) {
- rio_dprintk (RIO_DEBUG_INTR, "RFLUSH on deleted RTA\n");
- PortP->RxDataStart = 0;
- }
- else {
- if ( RIOPreemptiveCmd( p, PortP, RFLUSH ) == RIO_FAIL ) {
- rio_dprintk (RIO_DEBUG_INTR, "T_RFLUSH Command failed\n");
- return 0;
+ ** If there is more room available we start up the transmit
+ ** data process again. This can be direct I/O, if the cookmode
+ ** is set to COOK_RAW or COOK_MEDIUM, or will be a call to the
+ ** riotproc( T_OUTPUT ) if we are in COOK_WELL mode, to fetch
+ ** characters via the line discipline. We must always call
+ ** the line discipline,
+ ** so that user input characters can be echoed correctly.
+ **
+ ** ++++ Update +++++
+ ** With the advent of double buffering, we now see if
+ ** TxBufferOut-In is non-zero. If so, then we copy a packet
+ ** to the output place, and set it going. If this empties
+ ** the buffer, then we must issue a wakeup( ) on OUT.
+ ** If it frees space in the buffer then we must issue
+ ** a wakeup( ) on IN.
+ **
+ ** ++++ Extra! Extra! If PortP->WflushFlag is set, then we
+ ** have to send a WFLUSH command down the PHB, to mark the
+ ** end point of a WFLUSH. We also need to clear out any
+ ** data from the double buffer! ( note that WflushFlag is a
+ ** *count* of the number of WFLUSH commands outstanding! )
+ **
+ ** ++++ And there's more!
+ ** If an RTA is powered off, then on again, and rebooted,
+ ** whilst it has ports open, then we need to re-open the ports.
+ ** ( reasonable enough ). We can't do this when we spot the
+ ** re-boot, in interrupt time, because the queue is probably
+ ** full. So, when we come in here, we need to test if any
+ ** ports are in this condition, and re-open the port before
+ ** we try to send any more data to it. Now, the re-booted
+ ** RTA will be discarding packets from the PHB until it
+ ** receives this open packet, but don't worry tooo much
+ ** about that. The one thing that is interesting is the
+ ** combination of this effect and the WFLUSH effect!
+ */
+ /* For now don't handle RTA reboots. -- REW.
+ Reenabled. Otherwise RTA reboots didn't work. Duh. -- REW */
+ if (PortP->MagicFlags) {
+ if (PortP->MagicFlags & MAGIC_REBOOT) {
+ /*
+ ** well, the RTA has been rebooted, and there is room
+ ** on its queue to add the open packet that is required.
+ **
+ ** The messy part of this line is trying to decide if
+ ** we need to call the Param function as a tty or as
+ ** a modem.
+ ** DONT USE CLOCAL AS A TEST FOR THIS!
+ **
+ ** If we can't param the port, then move on to the
+ ** next port.
+ */
+ PortP->InUse = NOT_INUSE;
+
+ rio_spin_unlock(&PortP->portSem);
+ if (RIOParam(PortP, OPEN, ((PortP->Cor2Copy & (COR2_RTSFLOW | COR2_CTSFLOW)) == (COR2_RTSFLOW | COR2_CTSFLOW)) ? 1 : 0, DONT_SLEEP) == RIO_FAIL) {
+ continue; /* with next port */
+ }
+ rio_spin_lock(&PortP->portSem);
+ PortP->MagicFlags &= ~MAGIC_REBOOT;
}
- PortP->RxDataStart = 0;
- while ( can_remove_receive(&PacketP, PortP) ) {
- remove_receive(PortP);
- ShowPacket(DBG_PROC, PacketP );
- put_free_end(PortP->HostP, PacketP );
+
+ /*
+ ** As mentioned above, this is a tacky hack to cope
+ ** with WFLUSH
+ */
+ if (PortP->WflushFlag) {
+ rio_dprintk(RIO_DEBUG_INTR, "Want to WFLUSH mark this port\n");
+
+ if (PortP->InUse)
+ rio_dprintk(RIO_DEBUG_INTR, "FAILS - PORT IS IN USE\n");
}
- if ( PortP->PhbP->handshake == PHB_HANDSHAKE_SET ) {
+
+ while (PortP->WflushFlag && can_add_transmit(&PacketP, PortP) && (PortP->InUse == NOT_INUSE)) {
+ int p;
+ struct PktCmd *PktCmdP;
+
+ rio_dprintk(RIO_DEBUG_INTR, "Add WFLUSH marker to data queue\n");
/*
- ** MAGIC!
- */
- rio_dprintk (RIO_DEBUG_INTR, "Set receive handshake bit\n");
- PortP->PhbP->handshake |= PHB_HANDSHAKE_RESET;
+ ** make it look just like a WFLUSH command
+ */
+ PktCmdP = (struct PktCmd *) &PacketP->data[0];
+
+ writeb(WFLUSH, &PktCmdP->Command);
+
+ p = PortP->HostPort % (u16) PORTS_PER_RTA;
+
+ /*
+ ** If second block of ports for 16 port RTA, add 8
+ ** to index 8-15.
+ */
+ if (PortP->SecondBlock)
+ p += PORTS_PER_RTA;
+
+ writeb(p, &PktCmdP->PhbNum);
+
+ /*
+ ** to make debuggery easier
+ */
+ writeb('W', &PacketP->data[2]);
+ writeb('F', &PacketP->data[3]);
+ writeb('L', &PacketP->data[4]);
+ writeb('U', &PacketP->data[5]);
+ writeb('S', &PacketP->data[6]);
+ writeb('H', &PacketP->data[7]);
+ writeb(' ', &PacketP->data[8]);
+ writeb('0' + PortP->WflushFlag, &PacketP->data[9]);
+ writeb(' ', &PacketP->data[10]);
+ writeb(' ', &PacketP->data[11]);
+ writeb('\0', &PacketP->data[12]);
+
+ /*
+ ** its two bytes long!
+ */
+ writeb(PKT_CMD_BIT | 2, &PacketP->len);
+
+ /*
+ ** queue it!
+ */
+ if (!(PortP->State & RIO_DELETED)) {
+ add_transmit(PortP);
+ /*
+ ** Count chars tx'd for port statistics reporting
+ */
+ if (PortP->statsGather)
+ PortP->txchars += 2;
+ }
+
+ if (--(PortP->WflushFlag) == 0) {
+ PortP->MagicFlags &= ~MAGIC_FLUSH;
+ }
+
+ rio_dprintk(RIO_DEBUG_INTR, "Wflush count now stands at %d\n", PortP->WflushFlag);
+ }
+ if (PortP->MagicFlags & MORE_OUTPUT_EYGOR) {
+ if (PortP->MagicFlags & MAGIC_FLUSH) {
+ PortP->MagicFlags |= MORE_OUTPUT_EYGOR;
+ } else {
+ if (!can_add_transmit(&PacketP, PortP)) {
+ rio_spin_unlock(&PortP->portSem);
+ continue;
+ }
+ rio_spin_unlock(&PortP->portSem);
+ RIOTxEnable((char *) PortP);
+ rio_spin_lock(&PortP->portSem);
+ PortP->MagicFlags &= ~MORE_OUTPUT_EYGOR;
+ }
}
}
- break;
- /* FALLTHROUGH */
- case T_UNBLOCK:
- rio_dprintk (RIO_DEBUG_INTR, "T_UNBLOCK\n");
- /*
- ** If there is any data to receive set a timeout to service it.
- */
- RIOReceive(p, PortP);
- break;
-
- case T_BREAK:
- rio_dprintk (RIO_DEBUG_INTR, "T_BREAK\n");
- /*
- ** Send a break command. For Sys V
- ** this is a timed break, so we
- ** send a SBREAK[time] packet
- */
+
+
/*
- ** Build a BREAK command
- */
- if ( PortP->State & RIO_DELETED ) {
- rio_dprintk (RIO_DEBUG_INTR, "BREAK on deleted RTA\n");
+ ** If we can't add anything to the transmit queue, then
+ ** we need do none of the remaining processing.
+ */
+ if (!can_add_transmit(&PacketP, PortP)) {
+ rio_spin_unlock(&PortP->portSem);
+ continue;
}
- else {
- if (RIOShortCommand(PortP,SBREAK,2,
- p->RIOConf.BreakInterval)==RIO_FAIL) {
- rio_dprintk (RIO_DEBUG_INTR, "SBREAK RIOShortCommand failed\n");
- }
+
+ rio_spin_unlock(&PortP->portSem);
+ RIOTxEnable((char *) PortP);
+ }
+ }
+}
+
+/*
+** Routine for handling received data for tty drivers
+*/
+static void RIOReceive(struct rio_info *p, struct Port *PortP)
+{
+ struct tty_struct *TtyP;
+ unsigned short transCount;
+ struct PKT *PacketP;
+ register unsigned int DataCnt;
+ unsigned char *ptr;
+ unsigned char *buf;
+ int copied = 0;
+
+ static int intCount, RxIntCnt;
+
+ /*
+ ** The receive data process is to remove packets from the
+ ** PHB until there aren't any more or the current cblock
+ ** is full. When this occurs, there will be some left over
+ ** data in the packet, that we must do something with.
+ ** As we haven't unhooked the packet from the read list
+ ** yet, we can just leave the packet there, having first
+ ** made a note of how far we got. This means that we need
+ ** a pointer per port saying where we start taking the
+ ** data from - this will normally be zero, but when we
+ ** run out of space it will be set to the offset of the
+ ** next byte to copy from the packet data area. The packet
+ ** length field is decremented by the number of bytes that
+ ** we succesfully removed from the packet. When this reaches
+ ** zero, we reset the offset pointer to be zero, and free
+ ** the packet from the front of the queue.
+ */
+
+ intCount++;
+
+ TtyP = PortP->gs.tty;
+ if (!TtyP) {
+ rio_dprintk(RIO_DEBUG_INTR, "RIOReceive: tty is null. \n");
+ return;
+ }
+
+ if (PortP->State & RIO_THROTTLE_RX) {
+ rio_dprintk(RIO_DEBUG_INTR, "RIOReceive: Throttled. Can't handle more input.\n");
+ return;
+ }
+
+ if (PortP->State & RIO_DELETED) {
+ while (can_remove_receive(&PacketP, PortP)) {
+ remove_receive(PortP);
+ put_free_end(PortP->HostP, PacketP);
+ }
+ } else {
+ /*
+ ** loop, just so long as:
+ ** i ) there's some data ( i.e. can_remove_receive )
+ ** ii ) we haven't been blocked
+ ** iii ) there's somewhere to put the data
+ ** iv ) we haven't outstayed our welcome
+ */
+ transCount = 1;
+ while (can_remove_receive(&PacketP, PortP)
+ && transCount) {
+ RxIntCnt++;
+
+ /*
+ ** check that it is not a command!
+ */
+ if (PacketP->len & PKT_CMD_BIT) {
+ rio_dprintk(RIO_DEBUG_INTR, "RIO: unexpected command packet received on PHB\n");
+ /* rio_dprint(RIO_DEBUG_INTR, (" sysport = %d\n", p->RIOPortp->PortNum)); */
+ rio_dprintk(RIO_DEBUG_INTR, " dest_unit = %d\n", PacketP->dest_unit);
+ rio_dprintk(RIO_DEBUG_INTR, " dest_port = %d\n", PacketP->dest_port);
+ rio_dprintk(RIO_DEBUG_INTR, " src_unit = %d\n", PacketP->src_unit);
+ rio_dprintk(RIO_DEBUG_INTR, " src_port = %d\n", PacketP->src_port);
+ rio_dprintk(RIO_DEBUG_INTR, " len = %d\n", PacketP->len);
+ rio_dprintk(RIO_DEBUG_INTR, " control = %d\n", PacketP->control);
+ rio_dprintk(RIO_DEBUG_INTR, " csum = %d\n", PacketP->csum);
+ rio_dprintk(RIO_DEBUG_INTR, " data bytes: ");
+ for (DataCnt = 0; DataCnt < PKT_MAX_DATA_LEN; DataCnt++)
+ rio_dprintk(RIO_DEBUG_INTR, "%d\n", PacketP->data[DataCnt]);
+ remove_receive(PortP);
+ put_free_end(PortP->HostP, PacketP);
+ continue; /* with next packet */
}
-
+
/*
- ** done!
- */
- break;
-
- case T_INPUT:
- rio_dprintk (RIO_DEBUG_INTR, "Proc T_INPUT called - I don't know what to do!\n");
- break;
- case T_PARM:
- rio_dprintk (RIO_DEBUG_INTR, "Proc T_PARM called - I don't know what to do!\n");
- break;
-
- case T_SWTCH:
- rio_dprintk (RIO_DEBUG_INTR, "Proc T_SWTCH called - I don't know what to do!\n");
- break;
-
- default:
- rio_dprintk (RIO_DEBUG_INTR, "Proc UNKNOWN command %d\n",cmd);
+ ** How many characters can we move 'upstream' ?
+ **
+ ** Determine the minimum of the amount of data
+ ** available and the amount of space in which to
+ ** put it.
+ **
+ ** 1. Get the packet length by masking 'len'
+ ** for only the length bits.
+ ** 2. Available space is [buffer size] - [space used]
+ **
+ ** Transfer count is the minimum of packet length
+ ** and available space.
+ */
+
+ transCount = tty_buffer_request_room(TtyP, PacketP->len & PKT_LEN_MASK);
+ rio_dprintk(RIO_DEBUG_REC, "port %d: Copy %d bytes\n", PortP->PortNum, transCount);
+ /*
+ ** To use the following 'kkprintfs' for debugging - change the '#undef'
+ ** to '#define', (this is the only place ___DEBUG_IT___ occurs in the
+ ** driver).
+ */
+ ptr = (unsigned char *) PacketP->data + PortP->RxDataStart;
+
+ tty_prepare_flip_string(TtyP, &buf, transCount);
+ rio_memcpy_fromio(buf, ptr, transCount);
+ PortP->RxDataStart += transCount;
+ PacketP->len -= transCount;
+ copied += transCount;
+
+
+
+ if (PacketP->len == 0) {
+ /*
+ ** If we have emptied the packet, then we can
+ ** free it, and reset the start pointer for
+ ** the next packet.
+ */
+ remove_receive(PortP);
+ put_free_end(PortP->HostP, PacketP);
+ PortP->RxDataStart = 0;
+ }
+ }
}
- /*
- ** T_OUTPUT returns without passing through this point!
- */
- /*rio_dprint(RIO_DEBUG_INTR, PortP,DBG_PROC,"riotproc done\n");*/
- return(0);
+ if (copied) {
+ rio_dprintk(RIO_DEBUG_REC, "port %d: pushing tty flip buffer: %d total bytes copied.\n", PortP->PortNum, copied);
+ tty_flip_buffer_push(TtyP);
+ }
+
+ return;
}
-#endif
+
git://git.onelab.eu / linux-2.6.git / blobdiff