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Document the interrupt mitigation microcode option.

This commit is contained in:
thorpej 2002-04-05 20:01:41 +00:00
parent 60e2bbd09a
commit 09ebc46c6e
1 changed files with 37 additions and 9 deletions
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share/man/man4/fxp.4
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@ -1,6 +1,6 @@
.\" $NetBSD: fxp.4,v 1.9 2001/09/19 00:52:13 wiz Exp $
.\" $NetBSD: fxp.4,v 1.10 2002/04/05 20:01:41 thorpej Exp $
.\"
.\" Copyright (c) 1998 The NetBSD Foundation, Inc.
.\" Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
@ -35,28 +35,53 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd October 2, 1998
.Dd April 5, 2002
.Dt FXP 4
.Os
.Sh NAME
.Nm fxp
.Nd Intel i82557, i82558, and i82559 Ethernet interfaces device driver
.Nd Intel i8255x 10/100 Ethernet device driver
.Sh SYNOPSIS
.Cd "fxp* at cardbus? dev ? function ?"
.Cd "fxp* at pci? dev ? function ?"
.Sh DESCRIPTION
The
.Nm
device driver supports Ethernet interfaces based on the Intel i82557
and i82558 PCI Ethernet chips. The i82557 uses an external media
interface, whereas the i82558 includes a built-in Intel i82555 PHY.
The i82559 is an enhanced i82558.
device driver supports Ethernet interfaces based on the Intel i82557,
i82558, i82559, and i82550 10/100 PCI Ethernet chips.
.Pp
Certain versions of the i8255x support loading microcode which implements
a receive interrupt mitigation function, known as
.Dq CPUSaver .
Use of this option can improve performance in some situations by reducing
interrupt load on the host. This option is available on the following
chip versions:
.Pp
.Bl -bullet -compact
.It
i82558 step A4 (rev 4)
.It
i82558 step B0 (rev 5)
.It
i82559 step A0 (rev 8)
.It
i82559S step A (rev 9)
.It
i82550 (rev 12)
.It
i82550 step C (rev 13)
.El
.Pp
This option is enabled by setting the
.Dq link0
option with
.Xr ifconfig 8 .
.Sh HARDWARE
Cards supported by the
.Nm
driver include:
.Pp
.Bl -item -compact
.Bl -bullet -compact
.It
Intel EtherExpress Pro 10+
.It
@ -64,6 +89,8 @@ Intel EtherExpress Pro 100B
.It
Intel EtherExpress Pro 100+
.It
Intel InBusiness 10/100
.It
Intel PRO/100 S
.El
.Sh MEDIA SELECTION
@ -79,6 +106,7 @@ selection, as the 80c24 has no programming interface, and no
way to read link status. These boards claim a media of "manual"
since they self-configure based on the configuration of the link
partner (hub or switch).
.Pp
.Sh DIAGNOSTICS
.Bl -diag
.It "fxp0: WARNING: SCB timed out!"