Re: [PATCH v12 04/16] baseband/acc: introduce PMD for ACC200

[Thomas Monjalon <thomas@monjalon.net>]

12/10/2022 19:59, Nicolas Chautru:
> +Bind PF UIO driver(s)
> +~~~~~~~~~~~~~~~~~~~~~
> +
> +Install the DPDK igb_uio driver, bind it with the PF PCI device ID and use
> +``lspci`` to confirm the PF device is under use by ``igb_uio`` DPDK UIO driver.

igb_uio is not recommended.
Please focus on VFIO first.

> +The igb_uio driver may be bound to the PF PCI device using one of two methods
> +for ACC200:
> +
> +
> +1. PCI functions (physical or virtual, depending on the use case) can be bound
> +to the UIO driver by repeating this command for every function.
> +
> +.. code-block:: console
> +
> +  cd <dpdk-top-level-directory>
> +  insmod ./build/kmod/igb_uio.ko
> +  echo "8086 57c0" > /sys/bus/pci/drivers/igb_uio/new_id
> +  lspci -vd8086:57c0
> +
> +
> +2. Another way to bind PF with DPDK UIO driver is by using the ``dpdk-devbind.py`` tool
> +
> +.. code-block:: console
> +
> +  cd <dpdk-top-level-directory>
> +  ./usertools/dpdk-devbind.py -b igb_uio 0000:f7:00.0
> +
> +where the PCI device ID (example: 0000:f7:00.0) is obtained using lspci -vd8086:57c0

This binding is not specific to the driver.
It would be better to refer to the Linux guide
instead of duplicating it again and again.

> +In a similar way the PF may be bound with vfio-pci as any PCIe device.

You could mention igb_uio here.
Is there any advantage in using igb_uio?