linux-kernel - RE: [EXTERNAL] Re: [PATCH v4 1/1] misc: mrvl-cn10k-dpi: add Octeon CN10K DPI administrative driver

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Date: Fri, 12 Apr 2024 06:34:10 +0000
From: Vamsi Krishna Attunuru <vattunuru@...vell.com>
To: Greg KH <gregkh@...uxfoundation.org>
CC: "arnd@...db.de" <arnd@...db.de>,
        "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [EXTERNAL] Re: [PATCH v4 1/1] misc: mrvl-cn10k-dpi: add Octeon
 CN10K DPI administrative driver



> -----Original Message-----
> From: Greg KH <gregkh@...uxfoundation.org>
> Sent: Thursday, April 11, 2024 6:32 PM
> To: Vamsi Krishna Attunuru <vattunuru@...vell.com>
> Cc: arnd@...db.de; linux-kernel@...r.kernel.org
> Subject: [EXTERNAL] Re: [PATCH v4 1/1] misc: mrvl-cn10k-dpi: add Octeon
> CN10K DPI administrative driver
> 
> Prioritize security for external emails: Confirm sender and content safety
> before clicking links or opening attachments
> 
> ----------------------------------------------------------------------
> On Tue, Mar 12, 2024 at 03:56:57AM -0700, Vamsi Attunuru wrote:
> > --- /dev/null
> > +++ b/include/uapi/misc/mrvl_cn10k_dpi.h
> > @@ -0,0 +1,35 @@
> > +// SPDX-License-Identifier: GPL-2.0
> 
> Wrong license for a uapi file, right?  Please work with your lawyers to figure
> out the correct one if you have any questions.
> 

No concerns in using general licensing for uapi file, will fix in next version.

> > +/* Marvell Octeon CN10K DPI driver
> > + *
> > + * Copyright (C) 2024 Marvell.
> > + *
> > + */
> > +
> > +#ifndef __MRVL_CN10K_DPI_H__
> > +#define __MRVL_CN10K_DPI_H__
> > +
> > +#include <linux/types.h>
> > +
> > +#define DPI_MAX_ENGINES 6
> > +
> > +struct dpi_mps_mrrs_cfg {
> > +	u64 mrrs; /* Max read request size */
> > +	u64 mps;  /* Max packet size */
> > +	u64 port; /* Ebus port */
> > +};
> > +
> > +struct dpi_engine_cfg {
> > +	u64 fifo_mask; /* FIFO size mask in KBytes */
> > +	u64 molr[DPI_MAX_ENGINES];
> > +	u64 update_molr; /* '1' to update engine MOLR */
> 
> This is not how you create an ioctl, please read the kernel documentation for
> how to do it properly please.  (hint, wrong data
> types.)
Sure, will send next version with the fixes( u64 --> __u64). Thanks.

> 
> Also, a pointer to the userspace code that is going to use this new api you are
> creating would be apprecaited.
> 
> thanks,
> 
> greg k-h