Users Guide

7–Linux Driver Software
Setting Values for Optional Properties
45 BC0054508-00 M
bnx2x Driver Parameters
Parameters for the bnx2x driver are described in the following sections.
int_mode
Use the optional parameter int_mode to force using an interrupt mode other
than MSI-X. By default, the driver tries to enable MSI-X if it is supported by the
kernel. If MSI-X is not attainable, the driver tries to enable MSI if it is supported by
the kernel. If MSI is not attainable, the driver uses the legacy INTx mode.
To force using the legacy INTx mode on all BCM57xx and BCM57xxx network
adapters in the system, set the int_mode parameter to 1 as shown in the
following:
vmkload_mod bnx2x int_mode=1
To force using MSI mode on all BCM57xx and BCM57xxx network adapters in the
system, set the int_mode parameter to 2 as shown in the following:
vmkload_mod bnx2x int_mode=2
disable_tpa
Use the optional parameter disable_tpa to disable the transparent packet
aggregation (TPA) feature. By default, the driver aggregates TCP packets.
To disable the TPA feature on all BCM57xx and BCM57xxx network adapters in
the system, set the disable_tpa parameter to 1:
insmod bnx2x.ko disable_tpa=1
or
modprobe bnx2x disable_tpa=1
dropless_fc
The dropless_fc parameter is set to 1 (by default) to enable a complementary
flow control mechanism on BCM57xxx adapters. The normal flow control
mechanism is to send pause frames when the on-chip buffer (BRB) is reaching a
specific level of occupancy, which is a performance-targeted flow control
mechanism. On BCM57xxx adapters, you can enable a complementary flow
control mechanism to send pause frames when one or more of the host receive
buffers are exhausted.
dropless_fc is a “zero packet drop” targeted flow control mechanism.
Set the dropless_fc parameter to 1 to enable the drop-less flow control
mechanism feature on all BCM57xxx adapters in the system.
insmod bnx2x.ko dropless_fc=1