From: Keith Busch <keith.busch@intel.com>
To: Logan Gunthorpe <logang@deltatee.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Jonathan Corbet <corbet@lwn.net>,
"David S. Miller" <davem@davemloft.net>,
Andrew Morton <akpm@linux-foundation.org>,
Emil Velikov <emil.l.velikov@gmail.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Guenter Roeck <linux@roeck-us.net>,
linux-doc@vger.kernel.org, linux-pci@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org,
Stephen Bates <stephen.bates@microsemi.com>,
Kurt Schwemmer <kurt.schwemmer@microsemi.com>
Subject: Re: [RFC 1/1] MicroSemi Switchtec management interface driver
Date: Mon, 19 Dec 2016 12:02:02 -0500 [thread overview]
Message-ID: <20161219170201.GA1043@localhost.localdomain> (raw)
In-Reply-To: <1481994562-9283-2-git-send-email-logang@deltatee.com>
On Sat, Dec 17, 2016 at 10:09:22AM -0700, Logan Gunthorpe wrote:
> Microsemi's "Switchtec" line of PCI switch devices is already
> supported by the kernel with standard PCI switch drivers. However, the
> Switchtec device advertises a special management endpoint which
> enables some additional functionality. This includes:
>
> * Packet and Byte Counters
> * Firmware Upgrades
> * Event and Error logs
> * Querying port link status
> * Custom user firmware commands
>
> This patch introduces the switchtec kernel module which provides
> pci driver that exposes a char device. The char device provides
> userspace access to this interface through read, write and (optionally)
> poll calls. Currently no ioctls have been implemented but a couple
> may be added in a later revision.
>
> A short text file is provided which documents the switchtec driver
> and outlines the semantics of using the char device.
Some of this would be simplified if you use the managed device API's:
devm_request_irq, pcim_enable_device, pcim_iomap, etc...
next prev parent reply other threads:[~2016-12-19 17:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-17 17:09 [RFC 0/1] New PCI Switch Management Driver Logan Gunthorpe
2016-12-17 17:09 ` [RFC 1/1] MicroSemi Switchtec management interface driver Logan Gunthorpe
2016-12-18 7:51 ` Greg Kroah-Hartman
2016-12-18 17:20 ` Logan Gunthorpe
2016-12-19 6:35 ` Greg Kroah-Hartman
2016-12-19 17:02 ` Keith Busch [this message]
2016-12-19 17:07 ` Logan Gunthorpe
2016-12-19 16:09 ` [RFC 0/1] New PCI Switch Management Driver Myron Stowe
2016-12-19 17:06 ` Logan Gunthorpe
2016-12-19 17:29 ` Keith Busch
2016-12-19 17:26 ` Logan Gunthorpe
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