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Message-ID: <20070910233503.19058.29051.stgit@localhost.localdomain>
Date: Mon, 10 Sep 2007 16:35:03 -0700
From: Auke Kok <auke-jan.h.kok@...el.com>
To: akpm@...ux-foundation.org, davem@...emloft.net
Cc: netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
jirislaby@...il.com, Robert.Olsson@...a.slu.se, jeff@...zik.org
Subject: [PATCH] [-MM,
FIX V4] e1000e: incorporate napi_struct changes from net-2.6.24.git
This incorporates the new napi_struct changes into e1000e. Included
bugfix for ifdown hang from Krishna Kumar for e1000.
Disabling polling is no longer needed at init time, so remove
napi_disable() call from _probe().
This also fixes an endless polling loop where the driver signalled
"polling done" improperly back to the stack.
Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
---
drivers/net/e1000e/e1000.h | 2 ++
drivers/net/e1000e/netdev.c | 40 ++++++++++++++++------------------------
2 files changed, 18 insertions(+), 24 deletions(-)
diff --git a/drivers/net/e1000e/e1000.h b/drivers/net/e1000e/e1000.h
index c57e35a..d2499bb 100644
--- a/drivers/net/e1000e/e1000.h
+++ b/drivers/net/e1000e/e1000.h
@@ -187,6 +187,8 @@ struct e1000_adapter {
struct e1000_ring *tx_ring /* One per active queue */
____cacheline_aligned_in_smp;
+ struct napi_struct napi;
+
unsigned long tx_queue_len;
unsigned int restart_queue;
u32 txd_cmd;
diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index 372da46..eeb40cc 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -1149,12 +1149,12 @@ static irqreturn_t e1000_intr_msi(int irq, void *data)
mod_timer(&adapter->watchdog_timer, jiffies + 1);
}
- if (netif_rx_schedule_prep(netdev)) {
+ if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
adapter->total_tx_bytes = 0;
adapter->total_tx_packets = 0;
adapter->total_rx_bytes = 0;
adapter->total_rx_packets = 0;
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
} else {
atomic_dec(&adapter->irq_sem);
}
@@ -1212,12 +1212,12 @@ static irqreturn_t e1000_intr(int irq, void *data)
mod_timer(&adapter->watchdog_timer, jiffies + 1);
}
- if (netif_rx_schedule_prep(netdev)) {
+ if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
adapter->total_tx_bytes = 0;
adapter->total_tx_packets = 0;
adapter->total_rx_bytes = 0;
adapter->total_rx_packets = 0;
- __netif_rx_schedule(netdev);
+ __netif_rx_schedule(netdev, &adapter->napi);
} else {
atomic_dec(&adapter->irq_sem);
}
@@ -1662,10 +1662,10 @@ set_itr_now:
* e1000_clean - NAPI Rx polling callback
* @adapter: board private structure
**/
-static int e1000_clean(struct net_device *poll_dev, int *budget)
+static int e1000_clean(struct napi_struct *napi, int budget)
{
- struct e1000_adapter *adapter;
- int work_to_do = min(*budget, poll_dev->quota);
+ struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
+ struct net_device *poll_dev = adapter->netdev;
int tx_cleaned = 0, work_done = 0;
/* Must NOT use netdev_priv macro here. */
@@ -1684,25 +1684,19 @@ static int e1000_clean(struct net_device *poll_dev, int *budget)
spin_unlock(&adapter->tx_queue_lock);
}
- adapter->clean_rx(adapter, &work_done, work_to_do);
- *budget -= work_done;
- poll_dev->quota -= work_done;
+ adapter->clean_rx(adapter, &work_done, budget);
/* If no Tx and not enough Rx work done, exit the polling mode */
- if ((!tx_cleaned && (work_done == 0)) ||
+ if ((!tx_cleaned && (work_done < budget)) ||
!netif_running(poll_dev)) {
quit_polling:
if (adapter->itr_setting & 3)
e1000_set_itr(adapter);
- netif_rx_complete(poll_dev);
- if (test_bit(__E1000_DOWN, &adapter->state))
- atomic_dec(&adapter->irq_sem);
- else
- e1000_irq_enable(adapter);
- return 0;
+ netif_rx_complete(poll_dev, napi);
+ e1000_irq_enable(adapter);
}
- return 1;
+ return work_done;
}
static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
@@ -2439,7 +2433,7 @@ int e1000e_up(struct e1000_adapter *adapter)
clear_bit(__E1000_DOWN, &adapter->state);
- netif_poll_enable(adapter->netdev);
+ napi_enable(&adapter->napi);
e1000_irq_enable(adapter);
/* fire a link change interrupt to start the watchdog */
@@ -2472,7 +2466,7 @@ void e1000e_down(struct e1000_adapter *adapter)
e1e_flush();
msleep(10);
- netif_poll_disable(netdev);
+ napi_disable(&adapter->napi);
e1000_irq_disable(adapter);
del_timer_sync(&adapter->watchdog_timer);
@@ -2605,7 +2599,7 @@ static int e1000_open(struct net_device *netdev)
/* From here on the code is the same as e1000e_up() */
clear_bit(__E1000_DOWN, &adapter->state);
- netif_poll_enable(netdev);
+ napi_enable(&adapter->napi);
e1000_irq_enable(adapter);
@@ -4090,8 +4084,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
e1000e_set_ethtool_ops(netdev);
netdev->tx_timeout = &e1000_tx_timeout;
netdev->watchdog_timeo = 5 * HZ;
- netdev->poll = &e1000_clean;
- netdev->weight = 64;
+ netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
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;
@@ -4260,7 +4253,6 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
/* tell the stack to leave us alone until e1000_open() is called */
netif_carrier_off(netdev);
netif_stop_queue(netdev);
- netif_poll_disable(netdev);
strcpy(netdev->name, "eth%d");
err = register_netdev(netdev);
-
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