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Message-ID: <20080711221738.3255.6056.stgit@localhost.localdomain>
Date: Fri, 11 Jul 2008 15:17:38 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: jeff@...zik.org
Cc: davem@...emloft.net, netdev@...r.kernel.org,
Francois Romieu <romieu@...zoreil.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [NET-NEXT PATCH 8/9] e1000: delete non NAPI code from the driver
From: Francois Romieu <romieu@...zoreil.com>
Compile-tested only.
Signed-off-by: Francois Romieu <romieu@...zoreil.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
Documentation/networking/e1000.txt | 14 ---
drivers/net/Kconfig | 14 ---
drivers/net/e1000/e1000.h | 10 --
drivers/net/e1000/e1000_main.c | 151 +++---------------------------------
4 files changed, 16 insertions(+), 173 deletions(-)
diff --git a/Documentation/networking/e1000.txt b/Documentation/networking/e1000.txt
index 61b171c..2df7186 100644
--- a/Documentation/networking/e1000.txt
+++ b/Documentation/networking/e1000.txt
@@ -513,21 +513,11 @@ Additional Configurations
Intel(R) PRO/1000 PT Dual Port Server Connection
Intel(R) PRO/1000 PT Dual Port Server Adapter
Intel(R) PRO/1000 PF Dual Port Server Adapter
- Intel(R) PRO/1000 PT Quad Port Server Adapter
+ Intel(R) PRO/1000 PT Quad Port Server Adapter
NAPI
----
- NAPI (Rx polling mode) is supported in the e1000 driver. NAPI is enabled
- or disabled based on the configuration of the kernel. To override
- the default, use the following compile-time flags.
-
- To enable NAPI, compile the driver module, passing in a configuration option:
-
- make CFLAGS_EXTRA=-DE1000_NAPI install
-
- To disable NAPI, compile the driver module, passing in a configuration option:
-
- make CFLAGS_EXTRA=-DE1000_NO_NAPI install
+ NAPI (Rx polling mode) is enabled in the e1000 driver.
See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI.
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index ef733ab..0d39cb3 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -1964,20 +1964,6 @@ config E1000
To compile this driver as a module, choose M here. The module
will be called e1000.
-config E1000_NAPI
- bool "Use Rx Polling (NAPI)"
- depends on E1000
- help
- NAPI is a new driver API designed to reduce CPU and interrupt load
- when the driver is receiving lots of packets from the card. It is
- still somewhat experimental and thus not yet enabled by default.
-
- If your estimated Rx load is 10kpps or more, or if the card will be
- deployed on potentially unfriendly networks (e.g. in a firewall),
- then say Y here.
-
- If in doubt, say N.
-
config E1000_DISABLE_PACKET_SPLIT
bool "Disable Packet Split for PCI express adapters"
depends on E1000
diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 3aeba93..583b823 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -253,9 +253,7 @@ struct e1000_adapter {
u16 link_speed;
u16 link_duplex;
spinlock_t stats_lock;
-#ifdef CONFIG_E1000_NAPI
spinlock_t tx_queue_lock;
-#endif
unsigned int total_tx_bytes;
unsigned int total_tx_packets;
unsigned int total_rx_bytes;
@@ -293,22 +291,16 @@ struct e1000_adapter {
bool detect_tx_hung;
/* RX */
-#ifdef CONFIG_E1000_NAPI
bool (*clean_rx)(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do);
-#else
- bool (*clean_rx)(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
-#endif
void (*alloc_rx_buf)(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int cleaned_count);
struct e1000_rx_ring *rx_ring; /* One per active queue */
-#ifdef CONFIG_E1000_NAPI
struct napi_struct napi;
struct net_device *polling_netdev; /* One per active queue */
-#endif
+
int num_tx_queues;
int num_rx_queues;
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 28d14ae..19ac606 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -31,12 +31,7 @@
char e1000_driver_name[] = "e1000";
static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
-#ifndef CONFIG_E1000_NAPI
-#define DRIVERNAPI
-#else
-#define DRIVERNAPI "-NAPI"
-#endif
-#define DRV_VERSION "7.3.20-k2"DRIVERNAPI
+#define DRV_VERSION "7.3.20-k3-NAPI"
const char e1000_driver_version[] = DRV_VERSION;
static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
@@ -138,7 +133,6 @@ static irqreturn_t e1000_intr(int irq, void *data);
static irqreturn_t e1000_intr_msi(int irq, void *data);
static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring);
-#ifdef CONFIG_E1000_NAPI
static int e1000_clean(struct napi_struct *napi, int budget);
static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
@@ -146,12 +140,6 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do);
-#else
-static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring);
-static bool 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,
int cleaned_count);
@@ -512,9 +500,8 @@ int e1000_up(struct e1000_adapter *adapter)
clear_bit(__E1000_DOWN, &adapter->flags);
-#ifdef CONFIG_E1000_NAPI
napi_enable(&adapter->napi);
-#endif
+
e1000_irq_enable(adapter);
/* fire a link change interrupt to start the watchdog */
@@ -602,9 +589,8 @@ void e1000_down(struct e1000_adapter *adapter)
* reschedule our watchdog timer */
set_bit(__E1000_DOWN, &adapter->flags);
-#ifdef CONFIG_E1000_NAPI
napi_disable(&adapter->napi);
-#endif
+
e1000_irq_disable(adapter);
del_timer_sync(&adapter->tx_fifo_stall_timer);
@@ -966,9 +952,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
e1000_set_ethtool_ops(netdev);
netdev->tx_timeout = &e1000_tx_timeout;
netdev->watchdog_timeo = 5 * HZ;
-#ifdef CONFIG_E1000_NAPI
netif_napi_add(netdev, &adapter->napi, e1000_clean, 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;
@@ -1207,16 +1191,12 @@ err_eeprom:
if (hw->flash_address)
iounmap(hw->flash_address);
err_flashmap:
-#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++)
dev_put(&adapter->polling_netdev[i]);
-#endif
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
-#ifdef CONFIG_E1000_NAPI
kfree(adapter->polling_netdev);
-#endif
err_sw_init:
iounmap(hw->hw_addr);
err_ioremap:
@@ -1244,9 +1224,7 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
struct net_device *netdev = pci_get_drvdata(pdev);
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
-#ifdef CONFIG_E1000_NAPI
int i;
-#endif
cancel_work_sync(&adapter->reset_task);
@@ -1256,10 +1234,8 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
* would have already happened in close and is redundant. */
e1000_release_hw_control(adapter);
-#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++)
dev_put(&adapter->polling_netdev[i]);
-#endif
unregister_netdev(netdev);
@@ -1268,9 +1244,7 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
kfree(adapter->tx_ring);
kfree(adapter->rx_ring);
-#ifdef CONFIG_E1000_NAPI
kfree(adapter->polling_netdev);
-#endif
iounmap(hw->hw_addr);
if (hw->flash_address)
@@ -1296,9 +1270,7 @@ static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
struct e1000_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
struct pci_dev *pdev = adapter->pdev;
-#ifdef CONFIG_E1000_NAPI
int i;
-#endif
/* PCI config space info */
@@ -1356,14 +1328,12 @@ static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
return -ENOMEM;
}
-#ifdef CONFIG_E1000_NAPI
for (i = 0; i < adapter->num_rx_queues; i++) {
adapter->polling_netdev[i].priv = adapter;
dev_hold(&adapter->polling_netdev[i]);
set_bit(__LINK_STATE_START, &adapter->polling_netdev[i].state);
}
spin_lock_init(&adapter->tx_queue_lock);
-#endif
/* Explicitly disable IRQ since the NIC can be in any state. */
e1000_irq_disable(adapter);
@@ -1398,7 +1368,6 @@ static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
return -ENOMEM;
}
-#ifdef CONFIG_E1000_NAPI
adapter->polling_netdev = kcalloc(adapter->num_rx_queues,
sizeof(struct net_device),
GFP_KERNEL);
@@ -1407,7 +1376,6 @@ static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
kfree(adapter->rx_ring);
return -ENOMEM;
}
-#endif
return E1000_SUCCESS;
}
@@ -1472,9 +1440,7 @@ static int e1000_open(struct net_device *netdev)
/* From here on the code is the same as e1000_up() */
clear_bit(__E1000_DOWN, &adapter->flags);
-#ifdef CONFIG_E1000_NAPI
napi_enable(&adapter->napi);
-#endif
e1000_irq_enable(adapter);
@@ -2067,11 +2033,9 @@ static void e1000_configure_rx(struct e1000_adapter *adapter)
ctrl_ext = er32(CTRL_EXT);
/* Reset delay timers after every interrupt */
ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
-#ifdef CONFIG_E1000_NAPI
/* Auto-Mask interrupts upon ICR access */
ctrl_ext |= E1000_CTRL_EXT_IAME;
ew32(IAM, 0xffffffff);
-#endif
ew32(CTRL_EXT, ctrl_ext);
E1000_WRITE_FLUSH();
}
@@ -3770,9 +3734,6 @@ static irqreturn_t e1000_intr_msi(int irq, void *data)
struct net_device *netdev = data;
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
-#ifndef CONFIG_E1000_NAPI
- int i;
-#endif
u32 icr = er32(ICR);
/* in NAPI mode read ICR disables interrupts using IAM */
@@ -3793,7 +3754,6 @@ static irqreturn_t e1000_intr_msi(int irq, void *data)
mod_timer(&adapter->watchdog_timer, jiffies + 1);
}
-#ifdef CONFIG_E1000_NAPI
if (likely(netif_rx_schedule_prep(netdev, &adapter->napi))) {
adapter->total_tx_bytes = 0;
adapter->total_tx_packets = 0;
@@ -3802,20 +3762,6 @@ static irqreturn_t e1000_intr_msi(int irq, void *data)
__netif_rx_schedule(netdev, &adapter->napi);
} else
e1000_irq_enable(adapter);
-#else
- adapter->total_tx_bytes = 0;
- adapter->total_rx_bytes = 0;
- adapter->total_tx_packets = 0;
- adapter->total_rx_packets = 0;
-
- for (i = 0; i < E1000_MAX_INTR; i++)
- if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
- !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
- break;
-
- if (likely(adapter->itr_setting & 3))
- e1000_set_itr(adapter);
-#endif
return IRQ_HANDLED;
}
@@ -3832,13 +3778,10 @@ static irqreturn_t e1000_intr(int irq, void *data)
struct e1000_adapter *adapter = netdev_priv(netdev);
struct e1000_hw *hw = &adapter->hw;
u32 rctl, icr = er32(ICR);
-#ifndef CONFIG_E1000_NAPI
- int i;
-#endif
+
if (unlikely(!icr))
return IRQ_NONE; /* Not our interrupt */
-#ifdef CONFIG_E1000_NAPI
/* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
* not set, then the adapter didn't send an interrupt */
if (unlikely(hw->mac_type >= e1000_82571 &&
@@ -3847,7 +3790,6 @@ static irqreturn_t e1000_intr(int irq, void *data)
/* Interrupt Auto-Mask...upon reading ICR, interrupts are masked. No
* need for the IMC write */
-#endif
if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) {
hw->get_link_status = 1;
@@ -3867,7 +3809,6 @@ static irqreturn_t e1000_intr(int irq, void *data)
mod_timer(&adapter->watchdog_timer, jiffies + 1);
}
-#ifdef CONFIG_E1000_NAPI
if (unlikely(hw->mac_type < e1000_82571)) {
/* disable interrupts, without the synchronize_irq bit */
ew32(IMC, ~0);
@@ -3883,46 +3824,14 @@ static irqreturn_t e1000_intr(int irq, void *data)
/* this really should not happen! if it does it is basically a
* bug, but not a hard error, so enable ints and continue */
e1000_irq_enable(adapter);
-#else
- /* Writing IMC and IMS is needed for 82547.
- * Due to Hub Link bus being occupied, an interrupt
- * de-assertion message is not able to be sent.
- * When an interrupt assertion message is generated later,
- * two messages are re-ordered and sent out.
- * That causes APIC to think 82547 is in de-assertion
- * state, while 82547 is in assertion state, resulting
- * in dead lock. Writing IMC forces 82547 into
- * de-assertion state.
- */
- if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
- ew32(IMC, ~0);
-
- adapter->total_tx_bytes = 0;
- adapter->total_rx_bytes = 0;
- adapter->total_tx_packets = 0;
- adapter->total_rx_packets = 0;
-
- for (i = 0; i < E1000_MAX_INTR; i++)
- if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring) &
- !e1000_clean_tx_irq(adapter, adapter->tx_ring)))
- break;
- if (likely(adapter->itr_setting & 3))
- e1000_set_itr(adapter);
-
- if (hw->mac_type == e1000_82547 || hw->mac_type == e1000_82547_rev_2)
- e1000_irq_enable(adapter);
-
-#endif
return IRQ_HANDLED;
}
-#ifdef CONFIG_E1000_NAPI
/**
* e1000_clean - NAPI Rx polling callback
* @adapter: board private structure
**/
-
static int e1000_clean(struct napi_struct *napi, int budget)
{
struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
@@ -3959,12 +3868,10 @@ static int e1000_clean(struct napi_struct *napi, int budget)
return work_done;
}
-#endif
/**
* e1000_clean_tx_irq - Reclaim resources after transmit completes
* @adapter: board private structure
**/
-
static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_ring *tx_ring)
{
@@ -3973,9 +3880,7 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
struct e1000_tx_desc *tx_desc, *eop_desc;
struct e1000_buffer *buffer_info;
unsigned int i, eop;
-#ifdef CONFIG_E1000_NAPI
unsigned int count = 0;
-#endif
bool cleaned = false;
unsigned int total_tx_bytes=0, total_tx_packets=0;
@@ -4007,11 +3912,10 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter,
eop = tx_ring->buffer_info[i].next_to_watch;
eop_desc = E1000_TX_DESC(*tx_ring, eop);
-#ifdef CONFIG_E1000_NAPI
#define E1000_TX_WEIGHT 64
/* weight of a sort for tx, to avoid endless transmit cleanup */
- if (count++ == E1000_TX_WEIGHT) break;
-#endif
+ if (count++ == E1000_TX_WEIGHT)
+ break;
}
tx_ring->next_to_clean = i;
@@ -4124,14 +4028,9 @@ static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
* e1000_clean_rx_irq - Send received data up the network stack; legacy
* @adapter: board private structure
**/
-#ifdef CONFIG_E1000_NAPI
static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do)
-#else
-static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
-#endif
{
struct e1000_hw *hw = &adapter->hw;
struct net_device *netdev = adapter->netdev;
@@ -4154,11 +4053,10 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
struct sk_buff *skb;
u8 status;
-#ifdef CONFIG_E1000_NAPI
if (*work_done >= work_to_do)
break;
(*work_done)++;
-#endif
+
status = rx_desc->status;
skb = buffer_info->skb;
buffer_info->skb = NULL;
@@ -4244,7 +4142,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
le16_to_cpu(rx_desc->csum), skb);
skb->protocol = eth_type_trans(skb, netdev);
-#ifdef CONFIG_E1000_NAPI
+
if (unlikely(adapter->vlgrp &&
(status & E1000_RXD_STAT_VP))) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
@@ -4252,15 +4150,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
} else {
netif_receive_skb(skb);
}
-#else /* CONFIG_E1000_NAPI */
- if (unlikely(adapter->vlgrp &&
- (status & E1000_RXD_STAT_VP))) {
- vlan_hwaccel_rx(skb, adapter->vlgrp,
- le16_to_cpu(rx_desc->special));
- } else {
- netif_rx(skb);
- }
-#endif /* CONFIG_E1000_NAPI */
+
netdev->last_rx = jiffies;
next_desc:
@@ -4294,14 +4184,9 @@ next_desc:
* @adapter: board private structure
**/
-#ifdef CONFIG_E1000_NAPI
static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
struct e1000_rx_ring *rx_ring,
int *work_done, int work_to_do)
-#else
-static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
- struct e1000_rx_ring *rx_ring)
-#endif
{
union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
struct net_device *netdev = adapter->netdev;
@@ -4324,11 +4209,11 @@ static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
while (staterr & E1000_RXD_STAT_DD) {
ps_page = &rx_ring->ps_page[i];
ps_page_dma = &rx_ring->ps_page_dma[i];
-#ifdef CONFIG_E1000_NAPI
+
if (unlikely(*work_done >= work_to_do))
break;
(*work_done)++;
-#endif
+
skb = buffer_info->skb;
/* in the packet split case this is header only */
@@ -4430,21 +4315,14 @@ copydone:
if (likely(rx_desc->wb.upper.header_status &
cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP)))
adapter->rx_hdr_split++;
-#ifdef CONFIG_E1000_NAPI
+
if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
le16_to_cpu(rx_desc->wb.middle.vlan));
} else {
netif_receive_skb(skb);
}
-#else /* CONFIG_E1000_NAPI */
- if (unlikely(adapter->vlgrp && (staterr & E1000_RXD_STAT_VP))) {
- vlan_hwaccel_rx(skb, adapter->vlgrp,
- le16_to_cpu(rx_desc->wb.middle.vlan));
- } else {
- netif_rx(skb);
- }
-#endif /* CONFIG_E1000_NAPI */
+
netdev->last_rx = jiffies;
next_desc:
@@ -5216,9 +5094,6 @@ static void e1000_netpoll(struct net_device *netdev)
disable_irq(adapter->pdev->irq);
e1000_intr(adapter->pdev->irq, netdev);
-#ifndef CONFIG_E1000_NAPI
- adapter->clean_rx(adapter, adapter->rx_ring);
-#endif
enable_irq(adapter->pdev->irq);
}
#endif
--
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