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[PATCH] e1000: made loopback test robust

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Added enhanced functionality to the loopback diags to wrap the descriptor rings.

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>
diff -up net-drivers-2.6/drivers/net/e1000/e1000_ethtool.c net-drivers-2.6/drivers/net/e1000.new/e1000_ethtool.c
This commit is contained in:
Malli Chilakala 2005-04-28 19:38:30 -07:00 committed by Jeff Garzik
parent 88d7bd8cb9
commit e4eff7291c
1 changed files with 57 additions and 22 deletions
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79
drivers/net/e1000/e1000_ethtool.c
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@ -919,7 +919,8 @@ e1000_setup_desc_rings(struct e1000_adapter *adapter)
/* Setup Tx descriptor ring and Tx buffers */
txdr->count = 80;
if(!txdr->count)
txdr->count = E1000_DEFAULT_TXD;
size = txdr->count * sizeof(struct e1000_buffer);
if(!(txdr->buffer_info = kmalloc(size, GFP_KERNEL))) {
@ -974,7 +975,8 @@ e1000_setup_desc_rings(struct e1000_adapter *adapter)
/* Setup Rx descriptor ring and Rx buffers */
rxdr->count = 80;
if(!rxdr->count)
rxdr->count = E1000_DEFAULT_RXD;
size = rxdr->count * sizeof(struct e1000_buffer);
if(!(rxdr->buffer_info = kmalloc(size, GFP_KERNEL))) {
@ -1310,31 +1312,62 @@ e1000_run_loopback_test(struct e1000_adapter *adapter)
struct e1000_desc_ring *txdr = &adapter->test_tx_ring;
struct e1000_desc_ring *rxdr = &adapter->test_rx_ring;
struct pci_dev *pdev = adapter->pdev;
int i, ret_val;
int i, j, k, l, lc, good_cnt, ret_val=0;
unsigned long time;
E1000_WRITE_REG(&adapter->hw, RDT, rxdr->count - 1);
for(i = 0; i < 64; i++) {
e1000_create_lbtest_frame(txdr->buffer_info[i].skb, 1024);
pci_dma_sync_single_for_device(pdev, txdr->buffer_info[i].dma,
txdr->buffer_info[i].length,
PCI_DMA_TODEVICE);
}
E1000_WRITE_REG(&adapter->hw, TDT, i);
/* Calculate the loop count based on the largest descriptor ring
* The idea is to wrap the largest ring a number of times using 64
* send/receive pairs during each loop
*/
msec_delay(200);
i = 0;
do {
pci_dma_sync_single_for_cpu(pdev, rxdr->buffer_info[i].dma,
rxdr->buffer_info[i].length,
PCI_DMA_FROMDEVICE);
ret_val = e1000_check_lbtest_frame(rxdr->buffer_info[i].skb,
1024);
i++;
} while (ret_val != 0 && i < 64);
if(rxdr->count <= txdr->count)
lc = ((txdr->count / 64) * 2) + 1;
else
lc = ((rxdr->count / 64) * 2) + 1;
k = l = 0;
for(j = 0; j <= lc; j++) { /* loop count loop */
for(i = 0; i < 64; i++) { /* send the packets */
e1000_create_lbtest_frame(txdr->buffer_info[i].skb,
1024);
pci_dma_sync_single_for_device(pdev,
txdr->buffer_info[k].dma,
txdr->buffer_info[k].length,
PCI_DMA_TODEVICE);
if(unlikely(++k == txdr->count)) k = 0;
}
E1000_WRITE_REG(&adapter->hw, TDT, k);
msec_delay(200);
time = jiffies; /* set the start time for the receive */
good_cnt = 0;
do { /* receive the sent packets */
pci_dma_sync_single_for_cpu(pdev,
rxdr->buffer_info[l].dma,
rxdr->buffer_info[l].length,
PCI_DMA_FROMDEVICE);
ret_val = e1000_check_lbtest_frame(
rxdr->buffer_info[l].skb,
1024);
if(!ret_val)
good_cnt++;
if(unlikely(++l == rxdr->count)) l = 0;
/* time + 20 msecs (200 msecs on 2.4) is more than
* enough time to complete the receives, if it's
* exceeded, break and error off
*/
} while (good_cnt < 64 && jiffies < (time + 20));
if(good_cnt != 64) {
ret_val = 13; /* ret_val is the same as mis-compare */
break;
}
if(jiffies >= (time + 2)) {
ret_val = 14; /* error code for time out error */
break;
}
} /* end loop count loop */
return ret_val;
}
@ -1371,6 +1404,8 @@ e1000_link_test(struct e1000_adapter *adapter, uint64_t *data)
*data = 1;
} else {
e1000_check_for_link(&adapter->hw);
if(adapter->hw.autoneg) /* if auto_neg is set wait for it */
msec_delay(4000);
if(!(E1000_READ_REG(&adapter->hw, STATUS) & E1000_STATUS_LU)) {
*data = 1;