Module Parameters

DRSS

Number of hardware queues for Default Queue (DEFQ) RSS.

Note: This parameter replaces the previously used “drss” parameter which is now obsolete.

• 2-16
• 0 - disabled

When this value is != 0, DEFQ RSS is enabled with 1 RSS Uplink queue that manages the 'drss' hardware queues.

Notes:

• The value must be a power of 2.
• The value must not exceed num. of CPU cores.
• Setting the DRSS value to 16, sets the Steering Mode to device RSS

ecn

Enables the ECN feature

• 1 - enabled
• 0 - disabled (Default)

enable_nmlx_debug

Enables debug prints for the core module.

• 1 - enabled
• 0 - disabled (Default)

max_vfs

max_vfs is an array of comma separated integer values, that represent the amount of VFs to open from each port.

For example: max_vfs = 1,1,2,2, will open a single VF per port on the first NIC and 2 VFs per port on second NIC. The order of the NICs is determined by pci SBDF number.

Note: VFs creation based on the system resources limitations.

• 0 - disabled (Default)

N number of VF to allocate over each port

Note: The amount of values provided in the max_vfs array should not exceed the supported_num_ports module parameter value.

mst_recovery

Enables recovery mode (only NMST module is loaded).

• 1 - enabled
• 0 - disabled (Default)

pfcrx

Priority based Flow Control policy on RX.

• 0-255
• 0 - default

It is an 8 bits bit mask, where each bit indicates a priority [0-7].

Bit values:

• 1 - respect incoming PFC pause frames for the specified priority.
• 0 - ignore incoming pause frames on the specified priority.

Note: The pfcrx and pfctx values must be identical.

pfctx

Priority based Flow Control policy on TX.

• 0-255
• 0 - default

It is an 8 bits bit mask, where each bit indicates a priority [0-7].

Bit values:

• 1 - generate pause frames according to the RX buffer threshold on the specified priority.
• 0 - never generate pause frames on the specified priority.

Note: The pfcrx and pfctx values must be identical.

rss

Number of hardware queues for NetQ RSS.

Note: This parameter replaces the previously used “rss” parameter which is now obsolete.

• 2-8
• 0 - disabled

When this value is != 0, NetQ RSS is enabled with 1 RSS uplink queue that manages the 'rss' hardware queues.

Notes:

• The value must be a power of 2
• The maximum value must be lower than the number of CPU cores.

supported_num_ports

Sets the maximum supported ports.

1-8

Default 1

Note: Before installing new cards, you must modify the maximum number of the supported ports to include the additional new ports.

Enable dropless RQ

When this feature is enabled, packets that are received while the software ring is full will not be immediately dropped.

The firmware will wait a certain period of time assuming the software will post new WQEs, otherwise the packets will be dropped.

• 1 - enabled
• 0 – disabled

• Default: 0