From e4eff7291c977308989b24fdfc7215a501302e6a Mon Sep 17 00:00:00 2001 From: Malli Chilakala Date: Thu, 28 Apr 2005 19:38:30 -0700 Subject: [PATCH] [PATCH] e1000: made loopback test robust Added enhanced functionality to the loopback diags to wrap the descriptor rings. Signed-off-by: Mallikarjuna R Chilakala Signed-off-by: Ganesh Venkatesan Signed-off-by: John Ronciak diff -up net-drivers-2.6/drivers/net/e1000/e1000_ethtool.c net-drivers-2.6/drivers/net/e1000.new/e1000_ethtool.c --- drivers/net/e1000/e1000_ethtool.c | 81 ++++++++++++++++++++++--------- 1 file changed, 58 insertions(+), 23 deletions(-) diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c index 0a2ca7c73a41..fae585453463 100644 --- a/drivers/net/e1000/e1000_ethtool.c +++ b/drivers/net/e1000/e1000_ethtool.c @@ -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); - - 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); + /* 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 + */ + 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; -- 2.20.1