linux-kernel - Re: [PATCH 3/5] ipmi:ipmb: Add initial support for IPMI over IPMB

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Date:   Tue, 5 Oct 2021 06:43:44 -0500
From:   Corey Minyard <minyard@....org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     openipmi-developer@...ts.sourceforge.net,
        Andrew Manley <andrew.manley@...lingtech.com>,
        linux-kernel@...r.kernel.org, Corey Minyard <cminyard@...sta.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 3/5] ipmi:ipmb: Add initial support for IPMI over IPMB

On Mon, Oct 04, 2021 at 06:27:34PM -0700, Randy Dunlap wrote:
> Hi,

Thanks, all issues addressed.

-corey

> 
> On 10/4/21 5:40 PM, minyard@....org wrote:
> > From: Corey Minyard <cminyard@...sta.com>
> > 
> > This provides access to the management controllers on an IPMB bus to a
> > device sitting on the IPMB bus.  It also provides slave capability to
> > respond to received messages on the bus.
> > 
> > Signed-off-by: Corey Minyard <minyard@....org>
> > Tested-by: Andrew Manley <andrew.manley@...lingtech.com>
> > Reviewed-by: Andrew Manley <andrew.manley@...lingtech.com>
> > ---
> >   drivers/char/ipmi/Kconfig     |   9 +
> >   drivers/char/ipmi/Makefile    |   1 +
> >   drivers/char/ipmi/ipmi_ipmb.c | 510 ++++++++++++++++++++++++++++++++++
> >   3 files changed, 520 insertions(+)
> >   create mode 100644 drivers/char/ipmi/ipmi_ipmb.c
> > 
> > diff --git a/drivers/char/ipmi/Kconfig b/drivers/char/ipmi/Kconfig
> > index 249b31197eea..1c92209f023b 100644
> > --- a/drivers/char/ipmi/Kconfig
> > +++ b/drivers/char/ipmi/Kconfig
> > @@ -75,6 +75,15 @@ config IPMI_SSIF
> >   	  have a driver that must be accessed over an I2C bus instead of a
> >   	  standard interface.  This module requires I2C support.
> > +config IPMI_IPMB
> > +       tristate 'IPMI IPMB interface'
> > +       select I2C
> 
> How can this select I2C unconditionally? At this point we don't
> even know if this platform has/supports I2C.
> 
> Ditto for IPMI_SSIF in the current Kconfig file, while
> IPMB_DEVICE_INTERFACE depends on I2C (as it should IMO).
> 
> 
> 
> > +       help
> > +	 Provides a driver for a system running right on the IPMB bus.
> > +	 It supports normal system interface messages to a BMC on the IPMB
> > +	 bus, and it also supports direct messaging on the bus using
> > +	 IPMB direct messages.  This module requires I2C support.
> 
> <form-letter-bot>
> 
> Please follow coding-style for Kconfig files:
> 
> (from Documentation/process/coding-style.rst, section 10):
> 
> For all of the Kconfig* configuration files throughout the source tree,
> the indentation is somewhat different.  Lines under a ``config`` definition
> are indented with one tab, while help text is indented an additional two
> spaces.
> 
> > +
> >   config IPMI_POWERNV
> >   	depends on PPC_POWERNV
> >   	tristate 'POWERNV (OPAL firmware) IPMI interface'
> 
> 
> > diff --git a/drivers/char/ipmi/ipmi_ipmb.c b/drivers/char/ipmi/ipmi_ipmb.c
> > new file mode 100644
> > index 000000000000..b10a1fd9c563
> > --- /dev/null
> > +++ b/drivers/char/ipmi/ipmi_ipmb.c
> > @@ -0,0 +1,510 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +
> > +/*
> > + * Driver to talk to a remote management controller on IPMB.
> > + */
> > +
> 
> [...]
> 
> > +
> > +static int ipmi_ipmb_start_processing(void            *send_info,
> 
> Odd spacing/formatting above.
> 
> > +				      struct ipmi_smi *new_intf)
> > +{
> > +	struct ipmi_ipmb_dev *iidev = send_info;
> > +
> > +	iidev->intf = new_intf;
> > +	iidev->ready = true;
> > +	return 0;
> > +}
> > +
> > +
> > +static void ipmi_ipmb_sender(void                *send_info,
> 
> Ditto.
> 
> > +			     struct ipmi_smi_msg *msg)
> > +{
> 
> 
> -- 
> ~Randy