From 66a2b0a30fcc37876d3639ea375a9d24649b53bf Mon Sep 17 00:00:00 2001 From: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Date: Thu, 12 Jan 2006 16:50:53 -0800 Subject: [PATCH] e1000: Fix TX queue length based on link speed 10/100 speeds seem to have some problems reporting false tx timeouts especially at half duplex. Fixed by using a timeout factor to attempt to mitigate the false timeouts. Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: John Ronciak <john.ronciak@intel.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com> --- drivers/net/e1000/e1000.h | 1 + drivers/net/e1000/e1000_main.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) (limited to 'drivers') diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h index 0a084e915dd..d95a5f88181 100644 --- a/drivers/net/e1000/e1000.h +++ b/drivers/net/e1000/e1000.h @@ -296,6 +296,7 @@ struct e1000_adapter { uint32_t tx_fifo_head; uint32_t tx_head_addr; uint32_t tx_fifo_size; + uint8_t tx_timeout_factor; atomic_t tx_fifo_stall; boolean_t pcix_82544; boolean_t detect_tx_hung; diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index cefc7cc092a..cf4fc511703 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -2319,6 +2319,21 @@ e1000_watchdog_task(struct e1000_adapter *adapter) adapter->link_duplex == FULL_DUPLEX ? "Full Duplex" : "Half Duplex"); + /* tweak tx_queue_len according to speed/duplex */ + netdev->tx_queue_len = adapter->tx_queue_len; + adapter->tx_timeout_factor = 1; + if (adapter->link_duplex == HALF_DUPLEX) { + switch (adapter->link_speed) { + case SPEED_10: + netdev->tx_queue_len = 10; + adapter->tx_timeout_factor = 8; + break; + case SPEED_100: + netdev->tx_queue_len = 100; + break; + } + } + netif_carrier_on(netdev); netif_wake_queue(netdev); mod_timer(&adapter->phy_info_timer, jiffies + 2 * HZ); -- cgit v1.2.3