From: Jesse Huang <[email protected]>
IP1000A on some motherboard when running at PCI 66MHz will cause transmit
hold. I had change three functions to solve this problem. Sorry for lot of
modify.
Change Logs:
For compatible at 66MHz issue
rewrite init_tfdlist()
rewrite ipg_nic_hard_start_xmit()
rewrite ipg_nic_txfree()
in ipg.h add:
long LastTFDHoldAddr;
int LastTFDHoldCnt;
int ResetCurrentTFD;
---
drivers/net/ipg.c | 40 +++++++++++++++++++++++++++++++---------
drivers/net/ipg.h | 4 +++-
2 files changed, 34 insertions(+), 10 deletions(-)
152a32c3d36ec4ce1eee72429aa5956274bb0e6a
diff --git a/drivers/net/ipg.c b/drivers/net/ipg.c
index ae22fa8..8127f2c 100644
--- a/drivers/net/ipg.c
+++ b/drivers/net/ipg.c
@@ -886,10 +886,7 @@ static int init_tfdlist(struct net_devic
IPG_DEBUG_MSG("_init_tfdlist\n");
for (i = 0; i < IPG_TFDLIST_LENGTH; i++) {
- sp->TFDList[i].TFDNextPtr = cpu_to_le64(sp->TFDListDMAhandle +
- ((sizeof(struct TFD)) *
- ((i + 1) %
- IPG_TFDLIST_LENGTH)));
+ sp->TFDList[i].TFDNextPtr = 0;
sp->TFDList[i].TFC = cpu_to_le64(IPG_TFC_TFDDONE);
if (sp->TxBuff[i] != NULL)
@@ -907,6 +904,7 @@ static int init_tfdlist(struct net_devic
iowrite32((u32) (sp->TFDListDMAhandle), ioaddr + TFD_LIST_PTR_0);
iowrite32(0x00000000, ioaddr + TFD_LIST_PTR_1);
+ sp->ResetCurrentTFD=1;
return 0;
}
@@ -919,6 +917,7 @@ static void ipg_nic_txfree(struct net_de
struct ipg_nic_private *sp = netdev_priv(dev);
int NextToFree;
int maxtfdcount;
+ long CurrentTxTFDPtr=(ioread32(ipg_ioaddr(dev)+TFD_LIST_PTR_0)-(long)sp->TFDListDMAhandle)/(long)sizeof(struct TFD);
IPG_DEBUG_MSG("_nic_txfree\n");
@@ -941,8 +940,10 @@ static void ipg_nic_txfree(struct net_de
* If the TFDDone bit is set, free the associated
* buffer.
*/
- if ((le64_to_cpu(sp->TFDList[NextToFree].TFC) &
- IPG_TFC_TFDDONE) && (NextToFree != sp->CurrentTFD)) {
+ if((NextToFree != sp->CurrentTFD)&&(NextToFree!=CurrentTxTFDPtr))
+ {
+ //JesseAdd: setup TFDDONE for compatible issue.
+ sp->TFDList[NextToFree].TFC = cpu_to_le64(sp->TFDList[NextToFree].TFC|IPG_TFC_TFDDONE);
/* Free the transmit buffer. */
if (sp->TxBuff[NextToFree] != NULL) {
pci_unmap_single(sp->pdev,
@@ -965,6 +966,15 @@ static void ipg_nic_txfree(struct net_de
maxtfdcount--;
} while (maxtfdcount != 0);
+ if(sp->LastTFDHoldCnt>1000) {
+ sp->LastTFDHoldCnt=0;
+ ipg_reset(dev, IPG_AC_TX_RESET | IPG_AC_DMA | IPG_AC_NETWORK | IPG_AC_FIFO);
+ // Re-configure after DMA reset.
+ if ((ipg_io_config(dev) < 0) ||(init_tfdlist(dev) < 0)) {
+ printk(KERN_INFO"%s: Error during re-configuration.\n",dev->name);
+ }
+ iowrite32(IPG_MC_RSVD_MASK & (ioread32(ipg_ioaddr(dev) + MAC_CTRL) | IPG_MC_TX_ENABLE),ipg_ioaddr(dev) + MAC_CTRL);
+ }
}
/*
@@ -2041,10 +2051,17 @@ static int ipg_nic_hard_start_xmit(struc
* counter, modulus the length of the TFDList.
*/
NextTFD = (sp->CurrentTFD + 1) % IPG_TFDLIST_LENGTH;
+ if(sp->ResetCurrentTFD!=0)
+ {
+ sp->ResetCurrentTFD=0;
+ NextTFD=0;
+ }
+ /* Check for availability of next TFD. Reserve 1 for not become ring*/
+ if (NextTFD == sp->LastFreedTxBuff) {
+
+ if(sp->LastTFDHoldAddr==sp->CurrentTFD) sp->LastTFDHoldCnt++;
+ else {sp->LastTFDHoldAddr=sp->CurrentTFD;sp->LastTFDHoldCnt=0;}
- /* Check for availability of next TFD. */
- if (!(le64_to_cpu(sp->TFDList[NextTFD].TFC) &
- IPG_TFC_TFDDONE) || (NextTFD == sp->LastFreedTxBuff)) {
IPG_DEBUG_MSG("Next TFD not available.\n");
/* Attempt to free any used TFDs. */
@@ -2058,8 +2075,11 @@ #ifdef IPG_DEBUG
sp->TFDunavailCount++;
#endif
+ iowrite32(IPG_DC_RSVD_MASK & (IPG_DC_TX_DMA_POLL_NOW),ioaddr + DMA_CTRL);
return -ENOMEM;
}
+
+ sp->TFDList[NextTFD].TFDNextPtr=0;
sp->TxBuffDMAhandle[NextTFD].len = skb->len;
sp->TxBuffDMAhandle[NextTFD].dmahandle =
@@ -2151,6 +2171,8 @@ #endif
* for transfer to the IPG.
*/
sp->TFDList[NextTFD].TFC &= cpu_to_le64(~IPG_TFC_TFDDONE);
+ sp->TFDList[sp->CurrentTFD].TFDNextPtr=cpu_to_le64(sp->TFDListDMAhandle+
+sizeof(struct TFD)*NextTFD);
/* Record frame transmit start time (jiffies = Linux
* kernel current time stamp).
diff --git a/drivers/net/ipg.h b/drivers/net/ipg.h
index 818a677..9688483 100644
--- a/drivers/net/ipg.h
+++ b/drivers/net/ipg.h
@@ -834,7 +834,9 @@ #endif
struct mutex mii_mutex;
struct mii_if_info mii_if;
-
+ long LastTFDHoldAddr;
+ int LastTFDHoldCnt;
+ int ResetCurrentTFD;
#ifdef IPG_DEBUG
int TFDunavailCount;
int RFDlistendCount;
--
1.3.GIT
-
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