linux-kernel - Re: [PATCH char-misc-next 04/13] misc: mic: SCIF Peer Bus

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Message-ID: <20150109230726.GC3614@kroah.com>
Date:	Fri, 9 Jan 2015 15:07:26 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Sudeep Dutt <sudeep.dutt@...el.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Jonathan Corbet <corbet@....net>,
	linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
	Dave Jiang <dave.jiang@...el.com>,
	Nikhil Rao <nikhil.rao@...el.com>,
	Ashutosh Dixit <ashutosh.dixit@...el.com>
Subject: Re: [PATCH char-misc-next 04/13] misc: mic: SCIF Peer Bus

On Wed, Dec 10, 2014 at 11:47:44AM -0800, Sudeep Dutt wrote:
> The SCIF peer bus is used to register and unregister SCIF peer devices
> internally by the SCIF driver to signify the addition and removal of
> peer nodes respectively from the SCIF network. This simplifies remote node
> handling within SCIF and will also be used to support device probe/remove
> for SCIF client drivers (e.g. netdev over SCIF)
> 
> Reviewed-by: Nikhil Rao <nikhil.rao@...el.com>
> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@...el.com>
> Signed-off-by: Sudeep Dutt <sudeep.dutt@...el.com>
> ---
>  drivers/misc/mic/scif/scif_peer_bus.h |  63 +++++++++++++++++
>  drivers/misc/mic/scif/scif_peer_bus.c | 124 ++++++++++++++++++++++++++++++++++
>  2 files changed, 187 insertions(+)
>  create mode 100644 drivers/misc/mic/scif/scif_peer_bus.h
>  create mode 100644 drivers/misc/mic/scif/scif_peer_bus.c
> 
> diff --git a/drivers/misc/mic/scif/scif_peer_bus.h b/drivers/misc/mic/scif/scif_peer_bus.h
> new file mode 100644
> index 0000000..27ed508
> --- /dev/null
> +++ b/drivers/misc/mic/scif/scif_peer_bus.h
> @@ -0,0 +1,63 @@
> +/*
> + * Intel MIC Platform Software Stack (MPSS)
> + *
> + * Copyright(c) 2014 Intel Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License, version 2, as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * Intel SCIF driver.
> + */
> +#ifndef _SCIF_PEER_BUS_H_
> +#define _SCIF_PEER_BUS_H_
> +
> +#include <linux/device.h>
> +#include <linux/mic_common.h>
> +
> +/*
> + * Peer devices show up as PCIe devices for the mgmt node but not the cards.
> + * The mgmt node discovers all the cards on the PCIe bus and informs the other
> + * cards about their peers. Upon notification of a peer a node adds a peer
> + * device to the peer bus to maintain symmetry in the way devices are
> + * discovered across all nodes in the SCIF network.
> + */
> +/**
> + * scif_peer_dev - representation of a peer SCIF device
> + * @dev: underlying device
> + * @dnode - The destination node which this device will communicate with.
> + */
> +struct scif_peer_dev {
> +	struct device dev;
> +	u8 dnode;
> +};
> +
> +/**
> + * scif_peer_driver - operations for a scif_peer I/O driver
> + * @driver: underlying device driver (populate name and owner).
> + * @id_table: the ids serviced by this driver.
> + * @probe: the function to call when a device is found.  Returns 0 or -errno.
> + * @remove: the function to call when a device is removed.
> + */
> +struct scif_peer_driver {
> +	struct device_driver driver;
> +	const struct scif_peer_dev_id *id_table;
> +
> +	int (*probe)(struct scif_peer_dev *dev);
> +	void (*remove)(struct scif_peer_dev *dev);
> +};
> +
> +int scif_peer_register_driver(struct scif_peer_driver *driver);
> +void scif_peer_unregister_driver(struct scif_peer_driver *driver);
> +struct scif_dev;
> +struct scif_peer_dev *
> +scif_peer_register_device(struct scif_dev *sdev);

Odd formatting, don't you think?

Please put your "predeclare scif_dev" on an earlier line by itself, as
this is a mess.

thanks,

greg k-h
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