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Message-ID: <aEqiQEMpbekiG6Hn@archie.me>
Date: Thu, 12 Jun 2025 16:47:44 +0700
From: Bagas Sanjaya <bagasdotme@...il.com>
To: Pankaj Gupta <pankaj.gupta@....com>, Jonathan Corbet <corbet@....net>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>
Cc: linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, imx@...ts.linux.dev,
linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v17 1/7] Documentation/firmware: add imx/se to
other_interfaces
On Sat, Apr 26, 2025 at 12:31:32AM +0530, Pankaj Gupta wrote:
> +Each 'se-if' comprise of twp layers:
> +- (C_DEV Layer) User-Space software-access interface.
> +- (Service Layer) OS-level software-access interface.
> +
> + +--------------------------------------------+
> + | Character Device(C_DEV) |
> + | |
> + | +---------+ +---------+ +---------+ |
> + | | misc #1 | | misc #2 | ... | misc #n | |
> + | | dev | | dev | | dev | |
> + | +---------+ +---------+ +---------+ |
> + | +-------------------------+ |
> + | | Misc. Dev Synchr. Logic | |
> + | +-------------------------+ |
> + | |
> + +--------------------------------------------+
> +
> + +--------------------------------------------+
> + | Service Layer |
> + | |
> + | +-----------------------------+ |
> + | | Message Serialization Logic | |
> + | +-----------------------------+ |
> + | +---------------+ |
> + | | imx-mailbox | |
> + | | mailbox.c | |
> + | +---------------+ |
> + | |
> + +--------------------------------------------+
> +
> <snipped>
> +
> + Misc-device(/dev/<se>_mux_chn) synchronization protocol:
> +
> + Non-Secure + Secure
> + |
> + |
> + +---------+ +-------------+ |
> + | se_fw.c +<---->+imx-mailbox.c| |
> + | | | mailbox.c +<-->+------+ +------+
> + +---+-----+ +-------------+ | MU X +<-->+ ELE |
> + | +------+ +------+
> + +----------------+ |
> + | | |
> + v v |
> + logical logical |
> + receiver waiter |
> + + + |
> + | | |
> + | | |
> + | +----+------+ |
> + | | | |
> + | | | |
> + device_ctx device_ctx device_ctx |
> + |
> + User 0 User 1 User Y |
> + +------+ +------+ +------+ |
> + |misc.c| |misc.c| |misc.c| |
> + kernel space +------+ +------+ +------+ |
> + |
> + +------------------------------------------------------ |
> + | | | |
> + userspace /dev/ele_muXch0 | | |
> + /dev/ele_muXch1 | |
> + /dev/ele_muXchY |
> + |
> +
Wrap both diagrams above in literal code block (use double-colon).
Thanks.
--
An old man doll... just what I always wanted! - Clara
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