RE: [PATCH v3 2/2] net/ice: increase the maximum of RX/TX descriptors

["Morten Brørup" <mb@smartsharesystems.com>]

> From: Lukas Sismis [mailto:sismis@cesnet.cz]
> Sent: Wednesday, 30 October 2024 16.43
> 
> Intel PMDs are capped by default to only 4096 RX/TX descriptors.
> This can be limiting for applications requiring a bigger buffer
> capabilities. By bufferring more packets with RX/TX
> descriptors, the applications can better handle the processing
> peaks.
> 
> Setting ice max descriptors to 8192 - 32 as per datasheet:
> Register name: QLEN (Rx-Queue)
> Description: Receive Queue Length
> Defines the size of the descriptor queue in descriptors units
> from eight descriptors (QLEN=0x8) up to 8K descriptors minus
> 32 (QLEN=0x1FE0).
> QLEN Restrictions: When the PXE_MODE flag in the
> GLLAN_RCTL_0 register is cleared, the QLEN must be whole
> number of 32 descriptors. When the PXE_MODE flag is set, the
> QLEN can be one of the following options:
> Up to 4 PFs, QLEN can be set to: 8, 16, 24 or 32 descriptors.
> Up to 8 PFs, QLEN can be set to: 8 or 16 descriptors
> 
> Signed-off-by: Lukas Sismis <sismis@cesnet.cz>
> ---

Drivers should reflect hardware capabilities; it's not up to the driver to impose artificial limits on applications. Thank you for fixing this, Lukas.

Acked-by: Morten Brørup <mb@smartsharesystems.com>