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From: Arnd Bergmann <arnd@arndb.de>
To: Vitor Soares <Vitor.Soares@synopsys.com>
Cc: Joao Pinto <Joao.Pinto@synopsys.com>,
	Wolfram Sang <wsa@the-dreams.de>,
	gregkh <gregkh@linuxfoundation.org>,
	Boris Brezillon <bbrezillon@kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Mark Brown <broonie@kernel.org>,
	linux-i3c@lists.infradead.org
Subject: Re: [RFC 5/5] i3c: add i3cdev module to expose i3c dev in /dev
Date: Tue, 10 Dec 2019 18:51:14 +0100
Message-ID: <CAK8P3a1cwoTbT3zsa-tfApwewDT1-ksHZs6_vkBYpKbgptsfjw@mail.gmail.com> (raw)
In-Reply-To: <f9f20eaf900ed5629dd3d824bc1e90c7e6b4a371.1575977795.git.vitor.soares@synopsys.com>

On Tue, Dec 10, 2019 at 4:37 PM Vitor Soares <Vitor.Soares@synopsys.com> wrote:
>
> +/* IOCTL commands */
> +#define I3C_DEV_IOC_MAGIC      0x07
> +
> +struct i3c_ioc_priv_xfer {
> +       struct i3c_priv_xfer __user *xfers;     /* pointers to i3c_priv_xfer */
> +       __u32 nxfers;                           /* number of i3c_priv_xfer */
> +};
> +
> +#define I3C_IOC_PRIV_XFER      \
> +       _IOW(I3C_DEV_IOC_MAGIC, 30, struct i3c_ioc_priv_xfer)
> +
> +#define  I3C_IOC_PRIV_XFER_MAX_MSGS    42

This is not a great data structure for UAPI, please see
https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/tree/Documentation/core-api/ioctl.rst?h=compat-ioctl-endgame&id=927324b7900ee9b877691a8b237e272fabb21bf5

for some background. I'm planning to submit that documentation for
mainline integration soon.

     Arnd

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Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-10 15:37 [RFC 0/5] Introduce i3c device userspace interface Vitor Soares
2019-12-10 15:37 ` [RFC 1/5] i3c: master: export i3c_masterdev_type Vitor Soares
2019-12-10 15:37 ` [RFC 2/5] i3c: master: export i3c_bus_type symbol Vitor Soares
2019-12-10 15:37 ` [RFC 3/5] i3c: device: expose transfer strutures to uapi Vitor Soares
2019-12-12 14:42   ` Greg KH
2019-12-12 14:48     ` Vitor Soares
2019-12-10 15:37 ` [RFC 4/5] i3c: master: add i3c_for_each_dev helper Vitor Soares
2019-12-10 15:37 ` [RFC 5/5] i3c: add i3cdev module to expose i3c dev in /dev Vitor Soares
2019-12-10 17:51   ` Arnd Bergmann [this message]
2019-12-10 19:15     ` Vitor Soares
2019-12-10 19:37       ` Arnd Bergmann
2019-12-11 15:07         ` Vitor Soares
2019-12-11 15:33           ` Arnd Bergmann
2019-12-20 12:39     ` Vitor Soares
2019-12-12 14:44   ` Greg KH
2019-12-12 14:56     ` Vitor Soares
2019-12-12 16:00       ` Greg KH
2019-12-12 17:25         ` Vitor Soares
2019-12-12 17:32           ` Greg KH
2019-12-12 14:46   ` Greg KH

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