linux-kernel - Re: [PATCH v7 01/12] firmware: qcom: add a dedicated TrustZone buffer allocator

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Date: Sat, 17 Feb 2024 21:22:31 -0600
From: Bjorn Andersson <andersson@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Andy Gross <agross@...nel.org>, 
	Konrad Dybcio <konrad.dybcio@...aro.org>, Elliot Berman <quic_eberman@...cinc.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, Guru Das Srinagesh <quic_gurus@...cinc.com>, 
	Andrew Halaney <ahalaney@...hat.com>, Maximilian Luz <luzmaximilian@...il.com>, 
	Alex Elder <elder@...aro.org>, Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
	Arnd Bergmann <arnd@...db.de>, linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, kernel@...cinc.com, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, Deepti Jaggi <quic_djaggi@...cinc.com>
Subject: Re: [PATCH v7 01/12] firmware: qcom: add a dedicated TrustZone
 buffer allocator

On Mon, Feb 05, 2024 at 07:27:59PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
[..]
> diff --git a/drivers/firmware/qcom/qcom_tzmem.c b/drivers/firmware/qcom/qcom_tzmem.c
> new file mode 100644
> index 000000000000..44a062f2abd4
> --- /dev/null
> +++ b/drivers/firmware/qcom/qcom_tzmem.c
> @@ -0,0 +1,302 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later

Could you please confirm that "-or-later" is intended?

> +/*
> + * Memory allocator for buffers shared with the TrustZone.
> + *
> + * Copyright (C) 2023 Linaro Ltd.
> + */
[..]
> +/**
> + * qcom_tzmem_pool_new() - Create a new TZ memory pool.
> + * @size: Size of the new pool in bytes.
> + *
> + * Create a new pool of memory suitable for sharing with the TrustZone.
> + *
> + * Must not be used in atomic context.

 * Context: Describes whether the function can sleep, what locks it takes,
 *          releases, or expects to be held. It can extend over multiple
 *          lines.

> + *
> + * Returns:
> + * New memory pool address or ERR_PTR() on error.

 * Return: Describe the return value of function_name.

both from:
https://docs.kernel.org/doc-guide/kernel-doc.html#function-documentation

Regards,
Bjorn