Re: [PATCH 0/4] DPDK polling-mode driver for Amazon Elastic Network Adapters (ENA)

Hello Thomas,​
Regarding the documentation, we are going to add a description in doc/guides/nics in updated patch early on the upcoming week.

The full device spec still undergoes internal review, and will be released as soon as we have the approvals.

Best regards,
Alex
________________________________________
From: Thomas Monjalon <redacted>
Sent: Friday, January 29, 2016 6:04 PM
To: Jan Mędala
Cc: Matushevsky, Alexander; dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 0/4] DPDK polling-mode driver for Amazon Elastic Network Adapters (ENA)

2016-01-29 16:42, Jan Mędala:

Hello Thomas,

2016-01-28 16:40 GMT+01:00 Thomas Monjalon [off-list ref]:

quoted

quoted

 lib/librte_eal/linuxapp/ena_uio/ena_uio_driver.c   |  276 +++

Sorry the kernel module party is over.
One day, igb_uio will be removed.
I suggest to make a first version without interrupt support
and work with Linux community to fix your issues.

Rationale to deliver UIO kernel module is based on lack of legacy INTx
interrupts in ENA device. It's operating only on MSI-X.
Currently we do not implement interrupt support (yet) in PMD, but hardware
was unable to operate under uio_generic_pci driver - probe is failing.
It might be possible to use igb_uio kmod with ENA and I will do necessary
investigation+experiments to prove that.

Could you elaborate on the topic of kernel module removal - how would it
look like, is there going to be generic PCI driver dedicated for MSI-X
devices?

VFIO is the driver which should cover every needs for userspace drivers
requiring a generic kernel module. Another approach is used for mlx devices.
Thanks for checking how to improve your driver.

My other question was about documentation. I don't know your device.
Please any info or pointer?