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

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Message-ID: <20240729161121.GA3625856@nvidia.com>
Date: Mon, 29 Jul 2024 13:11:21 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.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

On Fri, Jul 26, 2024 at 04:50:21PM +0100, Jonathan Cameron wrote:
> 
> > 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

Yep, Randy noted it too

> > +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.

Thanks!

Jason