netdev - Re: [PATCH v2 6/8] fwctl: Add documentation

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Message-ID: <20240726165021.000002d6@Huawei.com>
Date: Fri, 26 Jul 2024 16:50:21 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Jason Gunthorpe <jgg@...dia.com>
CC: Jonathan Corbet <corbet@....net>, Itay Avraham <itayavr@...dia.com>, Jakub
 Kicinski <kuba@...nel.org>, Leon Romanovsky <leon@...nel.org>,
	<linux-doc@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
	<netdev@...r.kernel.org>, Paolo Abeni <pabeni@...hat.com>, Saeed Mahameed
	<saeedm@...dia.com>, Tariq Toukan <tariqt@...dia.com>, Andy Gospodarek
	<andrew.gospodarek@...adcom.com>, Aron Silverton <aron.silverton@...cle.com>,
	Dan Williams <dan.j.williams@...el.com>, David Ahern <dsahern@...nel.org>,
	Christoph Hellwig <hch@...radead.org>, Jiri Pirko <jiri@...dia.com>, Leonid
 Bloch <lbloch@...dia.com>, "Leon Romanovsky" <leonro@...dia.com>,
	<linux-cxl@...r.kernel.org>, <patches@...ts.linux.dev>
Subject: Re: [PATCH v2 6/8] fwctl: Add documentation


> diff --git a/Documentation/userspace-api/fwctl.rst b/Documentation/userspace-api/fwctl.rst
> new file mode 100644
> index 00000000000000..ece2db2530502f
> --- /dev/null
> +++ b/Documentation/userspace-api/fwctl.rst
> @@ -0,0 +1,269 @@

> +Overview
> +========
> +
> +Modern devices contain extensive amounts of FW, and in many cases, are largely

FW and, in many cases, are

> +software-defined pieces of hardware. The evolution of this approach is largely a
> +reaction to Moore's Law where a chip tape out is now highly expensive, and the
> +chip design is extremely large. Replacing fixed HW logic with a flexible and
> +tightly coupled FW/HW combination is an effective risk mitigation against chip
> +respin. Problems in the HW design can be counteracted in device FW. This is
> +especially true for devices which present a stable and backwards compatible
> +interface to the operating system driver (such as NVMe).

...

The document lays out where this sits well.

Jonathan