diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c | 57 |
1 files changed, 44 insertions, 13 deletions
diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c index 99bba29e0553..1bb4cd14b149 100644 --- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c +++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c @@ -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; + tx_ring->next_to_clean = i; - pr_debug("next_to_clean : %d\n", tx_ring->next_to_clean); - spin_unlock(&tx_ring->tx_lock); + 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) { |