From 72d64a436724da72f876c85a73895a622da6a673 Mon Sep 17 00:00:00 2001 From: Jeff Kirsher Date: Thu, 12 Jan 2006 16:51:19 -0800 Subject: [PATCH] [PATCH] e1000: Added cleaned_count to RX buffer allocation Signed-off-by: Jeff Kirsher Signed-off-by: Jesse Brandeburg Signed-off-by: John Ronciak Signed-off-by: Jeff Garzik --- drivers/net/e1000/e1000.h | 9 +++-- drivers/net/e1000/e1000_main.c | 68 +++++++++++++++++++++++----------- 2 files changed, 51 insertions(+), 26 deletions(-) diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h index d95a5f88181..27c77306193 100644 --- a/drivers/net/e1000/e1000.h +++ b/drivers/net/e1000/e1000.h @@ -304,14 +304,15 @@ struct e1000_adapter { /* RX */ #ifdef CONFIG_E1000_NAPI boolean_t (*clean_rx) (struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring, - int *work_done, int work_to_do); + struct e1000_rx_ring *rx_ring, + int *work_done, int work_to_do); #else boolean_t (*clean_rx) (struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring); + struct e1000_rx_ring *rx_ring); #endif void (*alloc_rx_buf) (struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring); + struct e1000_rx_ring *rx_ring, + int cleaned_count); struct e1000_rx_ring *rx_ring; /* One per active queue */ #ifdef CONFIG_E1000_NAPI struct net_device *polling_netdev; /* One per active queue */ diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 53f87fe511c..72a80099f4a 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -171,9 +171,11 @@ static boolean_t e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, struct e1000_rx_ring *rx_ring); #endif static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring); + struct e1000_rx_ring *rx_ring, + int cleaned_count); static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring); + struct e1000_rx_ring *rx_ring, + int cleaned_count); static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); @@ -411,8 +413,12 @@ e1000_up(struct e1000_adapter *adapter) e1000_configure_tx(adapter); e1000_setup_rctl(adapter); e1000_configure_rx(adapter); + /* call E1000_DESC_UNUSED which always leaves + * at least 1 descriptor unused to make sure + * next_to_use != next_to_clean */ for (i = 0; i < adapter->num_rx_queues; i++) { - adapter->alloc_rx_buf(adapter, &adapter->rx_ring[i]); + struct e1000_rx_ring *ring = &adapter->rx_ring[i]; + adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); } #ifdef CONFIG_PCI_MSI @@ -2119,7 +2125,9 @@ e1000_leave_82542_rst(struct e1000_adapter *adapter) if(netif_running(netdev)) { e1000_configure_rx(adapter); - e1000_alloc_rx_buffers(adapter, &adapter->rx_ring[0]); + /* No need to loop, because 82542 supports only 1 queue */ + struct e1000_rx_ring *ring = &adapter->rx_ring[0]; + adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); } } @@ -3539,6 +3547,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, uint8_t last_byte; unsigned int i; boolean_t cleaned = FALSE; + int cleaned_count = 0; i = rx_ring->next_to_clean; rx_desc = E1000_RX_DESC(*rx_ring, i); @@ -3550,11 +3559,10 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, break; (*work_done)++; #endif - cleaned = TRUE; - pci_unmap_single(pdev, - buffer_info->dma, - buffer_info->length, + cleaned = TRUE; + cleaned_count++; + pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); skb = buffer_info->skb; @@ -3573,8 +3581,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, if(TBI_ACCEPT(&adapter->hw, rx_desc->status, rx_desc->errors, length, last_byte)) { spin_lock_irqsave(&adapter->stats_lock, flags); - e1000_tbi_adjust_stats(&adapter->hw, - &adapter->stats, + e1000_tbi_adjust_stats(&adapter->hw, &adapter->stats, length, skb->data); spin_unlock_irqrestore(&adapter->stats_lock, flags); @@ -3589,8 +3596,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, skb_put(skb, length - ETHERNET_FCS_SIZE); /* Receive Checksum Offload */ - e1000_rx_checksum(adapter, - (uint32_t)(rx_desc->status) | + e1000_rx_checksum(adapter, (uint32_t)(rx_desc->status) | ((uint32_t)(rx_desc->errors) << 24), rx_desc->csum, skb); skb->protocol = eth_type_trans(skb, netdev); @@ -3621,13 +3627,19 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter, next_desc: rx_desc->status = 0; - buffer_info->skb = NULL; - if(unlikely(++i == rx_ring->count)) i = 0; - rx_desc = E1000_RX_DESC(*rx_ring, i); + /* return some buffers to hardware, one at a time is too slow */ + if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + cleaned_count = 0; + } + } rx_ring->next_to_clean = i; - adapter->alloc_rx_buf(adapter, rx_ring); + + cleaned_count = E1000_DESC_UNUSED(rx_ring); + if (cleaned_count) + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); return cleaned; } @@ -3656,6 +3668,7 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, struct sk_buff *skb; unsigned int i, j; uint32_t length, staterr; + int cleaned_count = 0; boolean_t cleaned = FALSE; i = rx_ring->next_to_clean; @@ -3672,6 +3685,7 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, (*work_done)++; #endif cleaned = TRUE; + cleaned_count++; pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, PCI_DMA_FROMDEVICE); @@ -3756,13 +3770,20 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter, next_desc: rx_desc->wb.middle.status_error &= ~0xFF; buffer_info->skb = NULL; - if(unlikely(++i == rx_ring->count)) i = 0; - rx_desc = E1000_RX_DESC_PS(*rx_ring, i); + /* return some buffers to hardware, one at a time is too slow */ + if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); + cleaned_count = 0; + } + staterr = le32_to_cpu(rx_desc->wb.middle.status_error); } rx_ring->next_to_clean = i; - adapter->alloc_rx_buf(adapter, rx_ring); + + cleaned_count = E1000_DESC_UNUSED(rx_ring); + if (cleaned_count) + adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); return cleaned; } @@ -3774,7 +3795,8 @@ next_desc: static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring) + struct e1000_rx_ring *rx_ring, + int cleaned_count) { struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; @@ -3792,6 +3814,7 @@ e1000_alloc_rx_buffers(struct e1000_adapter *adapter, if(unlikely(!skb)) { /* Better luck next round */ + adapter->alloc_rx_buff_failed++; break; } @@ -3876,7 +3899,8 @@ e1000_alloc_rx_buffers(struct e1000_adapter *adapter, static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter, - struct e1000_rx_ring *rx_ring) + struct e1000_rx_ring *rx_ring, + int cleaned_count) { struct net_device *netdev = adapter->netdev; struct pci_dev *pdev = adapter->pdev; @@ -3892,7 +3916,7 @@ e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter, ps_page = &rx_ring->ps_page[i]; ps_page_dma = &rx_ring->ps_page_dma[i]; - while(!buffer_info->skb) { + while (cleaned_count--) { rx_desc = E1000_RX_DESC_PS(*rx_ring, i); for(j = 0; j < PS_PAGE_BUFFERS; j++) { -- 2.20.1