Commit 168fbe85 authored by Scott Feldman's avatar Scott Feldman Committed by Jeff Garzik

e1000 net driver 6/6:

o Feature: Merged NAPI support from Robert Olsson
parent 84c335b0
......@@ -226,6 +226,7 @@ if [ "$CONFIG_ACENIC" != "n" ]; then
fi
dep_tristate 'D-Link DL2000-based Gigabit Ethernet support' CONFIG_DL2K $CONFIG_PCI
dep_tristate 'Intel(R) PRO/1000 Gigabit Ethernet support' CONFIG_E1000 $CONFIG_PCI
dep_mbool ' Use Rx Polling (NAPI) (EXPERIMENTAL)' CONFIG_E1000_NAPI $CONFIG_E1000 $CONFIG_EXPERIMENTAL
dep_tristate 'MyriCOM Gigabit Ethernet support' CONFIG_MYRI_SBUS $CONFIG_SBUS
dep_tristate 'National Semiconduct DP83820 support' CONFIG_NS83820 $CONFIG_PCI
dep_tristate 'Packet Engines Hamachi GNIC-II support' CONFIG_HAMACHI $CONFIG_PCI
......
......@@ -30,6 +30,9 @@
#include "e1000.h"
/* Change Log
*
* o Feature: merged in modified NAPI patch from Robert Olsson
* <Robert.Olsson@its.uu.se> Uppsala Univeristy, Sweden.
*
* 4.3.15 8/9/02
* o Converted from Dual BSD/GPL license to GPL license.
......@@ -156,7 +159,11 @@ static inline void e1000_irq_disable(struct e1000_adapter *adapter);
static inline void e1000_irq_enable(struct e1000_adapter *adapter);
static void e1000_intr(int irq, void *data, struct pt_regs *regs);
static void e1000_clean_tx_irq(struct e1000_adapter *adapter);
#ifdef CONFIG_E1000_NAPI
static int e1000_poll(struct net_device *netdev, int *budget);
#else
static void e1000_clean_rx_irq(struct e1000_adapter *adapter);
#endif
static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter);
static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd);
static void e1000_enter_82542_rst(struct e1000_adapter *adapter);
......@@ -391,6 +398,10 @@ e1000_probe(struct pci_dev *pdev,
netdev->do_ioctl = &e1000_ioctl;
netdev->tx_timeout = &e1000_tx_timeout;
netdev->watchdog_timeo = HZ;
#ifdef CONFIG_E1000_NAPI
netdev->poll = &e1000_poll;
netdev->weight = 64;
#endif
netdev->vlan_rx_register = e1000_vlan_rx_register;
netdev->vlan_rx_add_vid = e1000_vlan_rx_add_vid;
netdev->vlan_rx_kill_vid = e1000_vlan_rx_kill_vid;
......@@ -1715,6 +1726,13 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
{
struct net_device *netdev = data;
struct e1000_adapter *adapter = netdev->priv;
#ifdef CONFIG_E1000_NAPI
if (netif_rx_schedule_prep(netdev)) {
e1000_irq_disable(adapter);
__netif_rx_schedule(netdev);
}
#else
uint32_t icr;
int i = E1000_MAX_INTR;
......@@ -1730,8 +1748,38 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
i--;
}
#endif
}
#ifdef CONFIG_E1000_NAPI
static int
e1000_process_intr(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev->priv;
uint32_t icr;
int i = E1000_MAX_INTR;
int hasReceived = 0;
while(i && (icr = E1000_READ_REG(&adapter->hw, ICR))) {
if (icr & E1000_ICR_RXT0)
hasReceived = 1;
if (!(icr & ~(E1000_ICR_RXT0)))
break;
if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
adapter->hw.get_link_status = 1;
mod_timer(&adapter->watchdog_timer, jiffies);
}
e1000_clean_tx_irq(adapter);
i--;
}
return hasReceived;
}
#endif
/**
* e1000_clean_tx_irq - Reclaim resources after transmit completes
* @adapter: board private structure
......@@ -1783,6 +1831,136 @@ e1000_clean_tx_irq(struct e1000_adapter *adapter)
}
}
#ifdef CONFIG_E1000_NAPI
static int
e1000_poll(struct net_device *netdev, int *budget)
{
struct e1000_adapter *adapter = netdev->priv;
struct e1000_desc_ring *rx_ring = &adapter->rx_ring;
struct pci_dev *pdev = adapter->pdev;
struct e1000_rx_desc *rx_desc;
struct sk_buff *skb;
unsigned long flags;
uint32_t length;
uint8_t last_byte;
int i;
int received = 0;
int rx_work_limit = *budget;
if(rx_work_limit > netdev->quota)
rx_work_limit = netdev->quota;
e1000_process_intr(netdev);
i = rx_ring->next_to_clean;
rx_desc = E1000_RX_DESC(*rx_ring, i);
while(rx_desc->status & E1000_RXD_STAT_DD) {
if(--rx_work_limit < 0)
goto not_done;
pci_unmap_single(pdev,
rx_ring->buffer_info[i].dma,
rx_ring->buffer_info[i].length,
PCI_DMA_FROMDEVICE);
skb = rx_ring->buffer_info[i].skb;
length = le16_to_cpu(rx_desc->length);
if(!(rx_desc->status & E1000_RXD_STAT_EOP)) {
/* All receives must fit into a single buffer */
E1000_DBG("Receive packet consumed multiple buffers\n");
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = E1000_RX_DESC(*rx_ring, i);
continue;
}
if(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
last_byte = *(skb->data + length - 1);
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,
length, skb->data);
spin_unlock_irqrestore(&adapter->stats_lock,
flags);
length--;
} else {
dev_kfree_skb_irq(skb);
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = E1000_RX_DESC(*rx_ring, i);
continue;
}
}
/* Good Receive */
skb_put(skb, length - ETHERNET_FCS_SIZE);
/* Receive Checksum Offload */
e1000_rx_checksum(adapter, rx_desc, skb);
skb->protocol = eth_type_trans(skb, netdev);
if(adapter->vlgrp && (rx_desc->status & E1000_RXD_STAT_VP)) {
vlan_hwaccel_rx(skb, adapter->vlgrp,
(rx_desc->special & E1000_RXD_SPC_VLAN_MASK));
} else {
netif_receive_skb(skb);
}
netdev->last_rx = jiffies;
rx_desc->status = 0;
rx_ring->buffer_info[i].skb = NULL;
i = (i + 1) % rx_ring->count;
rx_desc = E1000_RX_DESC(*rx_ring, i);
received++;
}
if(!received)
received = 1;
e1000_alloc_rx_buffers(adapter);
rx_ring->next_to_clean = i;
netdev->quota -= received;
*budget -= received;
netif_rx_complete(netdev);
e1000_irq_enable(adapter);
return 0;
not_done:
e1000_alloc_rx_buffers(adapter);
rx_ring->next_to_clean = i;
netdev->quota -= received;
*budget -= received;
return 1;
}
#else
/**
* e1000_clean_rx_irq - Send received data up the network stack,
* @adapter: board private structure
......@@ -1886,6 +2064,7 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter)
e1000_alloc_rx_buffers(adapter);
}
#endif
/**
* e1000_alloc_rx_buffers - Replace used receive buffers
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment