Solarflare
Server
Adapter
User
Guide
Solarflare
Adapters
on
FreeBSD
Issue
20
©
Solarflare
Communications
2017
300
The
following
per
‐
adapter
parameters
in
are
used
to
control
the
configurable
parameters
for
the
Boot
ROM
driver
when
running
prior
to
the
operating
system
booting.
tx
‐
dc
‐
size=8|16|32|64
Specifies
the
size
of
the
descriptor
cache
for
each
transmit
queue.
This
is
for
SFN7000
and
SFN8000
series
adapters
only.
The
default
is:
•
32
if
the
port
‐
mode
supports
the
maximum
number
of
connectors
for
the
adapter.
•
64
if
the
port
‐
mode
supports
a
reduced
number
of
connectors.
vi
‐
count=<vi
count>
Sets
the
total
number
of
virtual
interfaces
that
will
be
available
on
the
NIC.
event
‐
merge
‐
timeout=
<timeout
in
nanoseconds>
Specifies
the
timeout
in
nanoseconds
for
RX
event
merging.
A
timeout
of
0
means
that
event
merging
is
disabled.
Table
71:
Sfboot
Global
Parameters
Parameter
Description
Table
72:
Sfboot
Per
‐
adapter
Parameters
Parameter
Description
link
‐
speed=auto|10g|1g|100m
Specifies
the
network
link
speed
of
the
adapter
used
by
the
Boot
ROM.
The
default
is
auto
.
On
the
10GBASE
‐
T
adapters,
auto
instructs
the
adapter
to
negotiate
the
highest
speed
supported
in
common
with
its
link
partner.
On
SFP+
adapters,
auto
instructs
the
adapter
to
use
the
highest
link
speed
supported
by
the
inserted
SFP+
module.
On
10GBASE
‐
T
and
SFP+
adapters,
any
other
value
specified
will
fix
the
link
at
that
speed,
regardless
of
the
capabilities
of
the
link
partner,
which
may
result
in
an
inability
to
establish
the
link.
auto
Auto
‐
negotiate
link
speed
(default)
10G
10G
bit/sec
1G
1G
bit/sec
100M
100M
bit/sec