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pch_gbe: add extra clean tx 

This adds extra cleaning to the pch_gbe_clean_tx routine to avoid
transmit timeouts on some BCM PHYs that have different timing.
Also update the DRV_VERSION to 1.01, and show it.

Signed-off-by: Andy Cress <andy.cress@us.kontron.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Cress 2012-07-26 06:00:11 +00:00 committed by David S. Miller
parent 913f53e4c8
commit f2c3166276
1 changed files with 45 additions and 14 deletions
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59
drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c
View File

@ -26,7 +26,7 @@
#include <linux/ptp_classify.h>
#endif
#define DRV_VERSION "1.00"
#define DRV_VERSION "1.01"
const char pch_driver_version[] = DRV_VERSION;
#define PCI_DEVICE_ID_INTEL_IOH1_GBE 0x8802 /* Pci device ID */
@ -1579,7 +1579,8 @@ pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
struct sk_buff *skb;
unsigned int i;
unsigned int cleaned_count = 0;
bool cleaned = true;
bool cleaned = false;
int unused, thresh;
pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
@ -1588,10 +1589,36 @@ pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
pr_debug("gbec_status:0x%04x dma_status:0x%04x\n",
tx_desc->gbec_status, tx_desc->dma_status);
unused = PCH_GBE_DESC_UNUSED(tx_ring);
thresh = tx_ring->count - PCH_GBE_TX_WEIGHT;
if ((tx_desc->gbec_status == DSC_INIT16) && (unused < thresh))
{ /* current marked clean, tx queue filling up, do extra clean */
int j, k;
if (unused < 8) { /* tx queue nearly full */
pr_debug("clean_tx: transmit queue warning (%x,%x) unused=%d\n",
tx_ring->next_to_clean,tx_ring->next_to_use,unused);
}
/* current marked clean, scan for more that need cleaning. */
k = i;
for (j = 0; j < PCH_GBE_TX_WEIGHT; j++)
{
tx_desc = PCH_GBE_TX_DESC(*tx_ring, k);
if (tx_desc->gbec_status != DSC_INIT16) break; /*found*/
if (++k >= tx_ring->count) k = 0; /*increment, wrap*/
}
if (j < PCH_GBE_TX_WEIGHT) {
pr_debug("clean_tx: unused=%d loops=%d found tx_desc[%x,%x:%x].gbec_status=%04x\n",
unused,j, i,k, tx_ring->next_to_use, tx_desc->gbec_status);
i = k; /*found one to clean, usu gbec_status==2000.*/
}
}
while ((tx_desc->gbec_status & DSC_INIT16) == 0x0000) {
pr_debug("gbec_status:0x%04x\n", tx_desc->gbec_status);
buffer_info = &tx_ring->buffer_info[i];
skb = buffer_info->skb;
cleaned = true;
if ((tx_desc->gbec_status & PCH_GBE_TXD_GMAC_STAT_ABT)) {
adapter->stats.tx_aborted_errors++;
@ -1639,18 +1666,21 @@ pch_gbe_clean_tx(struct pch_gbe_adapter *adapter,
}
pr_debug("called pch_gbe_unmap_and_free_tx_resource() %d count\n",
cleaned_count);
/* Recover from running out of Tx resources in xmit_frame */
spin_lock(&tx_ring->tx_lock);
if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev)))) {
netif_wake_queue(adapter->netdev);
adapter->stats.tx_restart_count++;
pr_debug("Tx wake queue\n");
if (cleaned_count > 0) { /*skip this if nothing cleaned*/
/* Recover from running out of Tx resources in xmit_frame */
spin_lock(&tx_ring->tx_lock);
if (unlikely(cleaned && (netif_queue_stopped(adapter->netdev))))
{
netif_wake_queue(adapter->netdev);
adapter->stats.tx_restart_count++;
pr_debug("Tx wake queue\n");
}
tx_ring->next_to_clean = i;
pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
spin_unlock(&tx_ring->tx_lock);
}
tx_ring->next_to_clean = i;
pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean);
spin_unlock(&tx_ring->tx_lock);
return cleaned;
}
@ -2389,7 +2419,7 @@ static int pch_gbe_napi_poll(struct napi_struct *napi, int budget)
pch_gbe_clean_rx(adapter, adapter->rx_ring, &work_done, budget);
cleaned = pch_gbe_clean_tx(adapter, adapter->tx_ring);
if (!cleaned)
if (cleaned)
work_done = budget;
/* If no Tx and not enough Rx work done,
* exit the polling mode
@ -2795,6 +2825,7 @@ static int __init pch_gbe_init_module(void)
{
int ret;
pr_info("EG20T PCH Gigabit Ethernet Driver - version %s\n",DRV_VERSION);
ret = pci_register_driver(&pch_gbe_driver);
if (copybreak != PCH_GBE_COPYBREAK_DEFAULT) {
if (copybreak == 0) {