summaryrefslogtreecommitdiff
path: root/dev/ns_gige.cc
diff options
context:
space:
mode:
Diffstat (limited to 'dev/ns_gige.cc')
-rw-r--r--dev/ns_gige.cc90
1 files changed, 46 insertions, 44 deletions
diff --git a/dev/ns_gige.cc b/dev/ns_gige.cc
index 27cda69da..331966f9c 100644
--- a/dev/ns_gige.cc
+++ b/dev/ns_gige.cc
@@ -108,10 +108,10 @@ NSGigE::NSGigE(const std::string &name, IntrControl *i, Tick intr_delay,
: PciDev(name, mmu, cf, cd, bus, dev, func), tsunami(t), ioEnable(false),
maxTxFifoSize(tx_fifo_size), maxRxFifoSize(rx_fifo_size),
txPacket(0), rxPacket(0), txPacketBufPtr(NULL), rxPacketBufPtr(NULL),
- txXferLen(0), rxXferLen(0), txState(txIdle), CTDD(false),
- txFifoAvail(tx_fifo_size), txHalt(false),
+ txXferLen(0), rxXferLen(0), txState(txIdle), txEnable(false),
+ CTDD(false), txFifoAvail(tx_fifo_size),
txFragPtr(0), txDescCnt(0), txDmaState(dmaIdle), rxState(rxIdle),
- CRDD(false), rxPktBytes(0), rxFifoCnt(0), rxHalt(false),
+ rxEnable(false), CRDD(false), rxPktBytes(0), rxFifoCnt(0),
rxFragPtr(0), rxDescCnt(0), rxDmaState(dmaIdle), extstsEnable(false),
rxDmaReadEvent(this), rxDmaWriteEvent(this),
txDmaReadEvent(this), txDmaWriteEvent(this),
@@ -586,24 +586,23 @@ NSGigE::write(MemReqPtr &req, const uint8_t *data)
switch (daddr) {
case CR:
regs.command = reg;
- if ((reg & (CR_TXE | CR_TXD)) == (CR_TXE | CR_TXD)) {
- txHalt = true;
+ if (reg & CR_TXD) {
+ txEnable = false;
} else if (reg & CR_TXE) {
- //the kernel is enabling the transmit machine
+ txEnable = true;
+
+ // the kernel is enabling the transmit machine
if (txState == txIdle)
txKick();
- } else if (reg & CR_TXD) {
- txHalt = true;
}
- if ((reg & (CR_RXE | CR_RXD)) == (CR_RXE | CR_RXD)) {
- rxHalt = true;
+ if (reg & CR_RXD) {
+ rxEnable = false;
} else if (reg & CR_RXE) {
- if (rxState == rxIdle) {
+ rxEnable = true;
+
+ if (rxState == rxIdle)
rxKick();
- }
- } else if (reg & CR_RXD) {
- rxHalt = true;
}
if (reg & CR_TXR)
@@ -777,6 +776,7 @@ NSGigE::write(MemReqPtr &req, const uint8_t *data)
case RXDP:
regs.rxdp = reg;
+ CRDD = false;
break;
case RXDP_HI:
@@ -1076,6 +1076,15 @@ NSGigE::cpuIntrPost(Tick when)
// schedule another.
// HOWEVER, must be sure that the scheduled intrTick is in the
// future (this was formerly the source of a bug)
+ /**
+ * @todo this warning should be removed and the intrTick code should
+ * be fixed.
+ */
+ if (intrTick < curTick && intrTick != 0) {
+ warn("intrTick < curTick !!! intrTick=%d curTick=%d\n",
+ intrTick, curTick);
+ intrTick = 0;
+ }
assert((intrTick >= curTick) || (intrTick == 0));
if (when > intrTick && intrTick != 0)
return;
@@ -1154,11 +1163,10 @@ NSGigE::txReset()
CTDD = false;
txFifoAvail = maxTxFifoSize;
- txHalt = false;
+ txEnable = false;;
txFragPtr = 0;
assert(txDescCnt == 0);
txFifo.clear();
- regs.command &= ~CR_TXE;
txState = txIdle;
assert(txDmaState == dmaIdle);
}
@@ -1171,12 +1179,11 @@ NSGigE::rxReset()
CRDD = false;
assert(rxPktBytes == 0);
rxFifoCnt = 0;
- rxHalt = false;
+ rxEnable = false;
rxFragPtr = 0;
assert(rxDescCnt == 0);
assert(rxDmaState == dmaIdle);
rxFifo.clear();
- regs.command &= ~CR_RXE;
rxState = rxIdle;
}
@@ -1340,7 +1347,7 @@ NSGigE::rxKick()
// an event and come back to this loop.
switch (rxState) {
case rxIdle:
- if (!regs.command & CR_RXE) {
+ if (!rxEnable) {
DPRINTF(EthernetSM, "Receive Disabled! Nothing to do.\n");
goto exit;
}
@@ -1395,7 +1402,9 @@ NSGigE::rxKick()
rxDescCache.extsts);
if (rxDescCache.cmdsts & CMDSTS_OWN) {
+ devIntrPost(ISR_RXIDLE);
rxState = rxIdle;
+ goto exit;
} else {
rxState = rxFifoBlock;
rxFragPtr = rxDescCache.bufptr;
@@ -1566,18 +1575,20 @@ NSGigE::rxKick()
if (rxDescCache.cmdsts & CMDSTS_INTR)
devIntrPost(ISR_RXDESC);
- if (rxHalt) {
+ if (!rxEnable) {
DPRINTF(EthernetSM, "Halting the RX state machine\n");
rxState = rxIdle;
- rxHalt = false;
+ goto exit;
} else
rxState = rxAdvance;
break;
case rxAdvance:
if (rxDescCache.link == 0) {
+ devIntrPost(ISR_RXIDLE);
rxState = rxIdle;
- return;
+ CRDD = true;
+ goto exit;
} else {
rxState = rxDescRead;
regs.rxdp = rxDescCache.link;
@@ -1601,12 +1612,6 @@ NSGigE::rxKick()
DPRINTF(EthernetSM, "entering next rx state = %s\n",
NsRxStateStrings[rxState]);
- if (rxState == rxIdle) {
- regs.command &= ~CR_RXE;
- devIntrPost(ISR_RXIDLE);
- return;
- }
-
goto next;
exit:
@@ -1805,7 +1810,7 @@ NSGigE::txKick()
switch (txState) {
case txIdle:
- if (!regs.command & CR_TXE) {
+ if (!txEnable) {
DPRINTF(EthernetSM, "Transmit disabled. Nothing to do.\n");
goto exit;
}
@@ -1865,7 +1870,9 @@ NSGigE::txKick()
txFragPtr = txDescCache.bufptr;
txDescCnt = txDescCache.cmdsts & CMDSTS_LEN_MASK;
} else {
+ devIntrPost(ISR_TXIDLE);
txState = txIdle;
+ goto exit;
}
break;
@@ -1948,10 +1955,10 @@ NSGigE::txKick()
transmit();
txPacket = 0;
- if (txHalt) {
+ if (!txEnable) {
DPRINTF(EthernetSM, "halting TX state machine\n");
txState = txIdle;
- txHalt = false;
+ goto exit;
} else
txState = txAdvance;
@@ -2004,16 +2011,17 @@ NSGigE::txKick()
if (txDmaState != dmaIdle)
goto exit;
- if (txDescCache.cmdsts & CMDSTS_INTR) {
+ if (txDescCache.cmdsts & CMDSTS_INTR)
devIntrPost(ISR_TXDESC);
- }
txState = txAdvance;
break;
case txAdvance:
if (txDescCache.link == 0) {
+ devIntrPost(ISR_TXIDLE);
txState = txIdle;
+ goto exit;
} else {
txState = txDescRead;
regs.txdp = txDescCache.link;
@@ -2036,12 +2044,6 @@ NSGigE::txKick()
DPRINTF(EthernetSM, "entering next tx state=%s\n",
NsTxStateStrings[txState]);
- if (txState == txIdle) {
- regs.command &= ~CR_TXE;
- devIntrPost(ISR_TXIDLE);
- return;
- }
-
goto next;
exit:
@@ -2123,7 +2125,7 @@ NSGigE::recvPacket(PacketPtr packet)
DPRINTF(Ethernet, "\n\nReceiving packet from wire, rxFifoAvail=%d\n",
maxRxFifoSize - rxFifoCnt);
- if (rxState == rxIdle) {
+ if (!rxEnable) {
DPRINTF(Ethernet, "receive disabled...packet dropped\n");
interface->recvDone();
return true;
@@ -2388,9 +2390,9 @@ NSGigE::serialize(ostream &os)
*/
int txState = this->txState;
SERIALIZE_SCALAR(txState);
+ SERIALIZE_SCALAR(txEnable);
SERIALIZE_SCALAR(CTDD);
SERIALIZE_SCALAR(txFifoAvail);
- SERIALIZE_SCALAR(txHalt);
SERIALIZE_SCALAR(txFragPtr);
SERIALIZE_SCALAR(txDescCnt);
int txDmaState = this->txDmaState;
@@ -2401,10 +2403,10 @@ NSGigE::serialize(ostream &os)
*/
int rxState = this->rxState;
SERIALIZE_SCALAR(rxState);
+ SERIALIZE_SCALAR(rxEnable);
SERIALIZE_SCALAR(CRDD);
SERIALIZE_SCALAR(rxPktBytes);
SERIALIZE_SCALAR(rxFifoCnt);
- SERIALIZE_SCALAR(rxHalt);
SERIALIZE_SCALAR(rxDescCnt);
int rxDmaState = this->rxDmaState;
SERIALIZE_SCALAR(rxDmaState);
@@ -2550,9 +2552,9 @@ NSGigE::unserialize(Checkpoint *cp, const std::string &section)
int txState;
UNSERIALIZE_SCALAR(txState);
this->txState = (TxState) txState;
+ UNSERIALIZE_SCALAR(txEnable);
UNSERIALIZE_SCALAR(CTDD);
UNSERIALIZE_SCALAR(txFifoAvail);
- UNSERIALIZE_SCALAR(txHalt);
UNSERIALIZE_SCALAR(txFragPtr);
UNSERIALIZE_SCALAR(txDescCnt);
int txDmaState;
@@ -2565,10 +2567,10 @@ NSGigE::unserialize(Checkpoint *cp, const std::string &section)
int rxState;
UNSERIALIZE_SCALAR(rxState);
this->rxState = (RxState) rxState;
+ UNSERIALIZE_SCALAR(rxEnable);
UNSERIALIZE_SCALAR(CRDD);
UNSERIALIZE_SCALAR(rxPktBytes);
UNSERIALIZE_SCALAR(rxFifoCnt);
- UNSERIALIZE_SCALAR(rxHalt);
UNSERIALIZE_SCALAR(rxDescCnt);
int rxDmaState;
UNSERIALIZE_SCALAR(rxDmaState);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-18 07:56:39 +0000