linux-kernel - Re: [PATCH V5 1/9] drivers core: Add support for Wifi band RF mitigations

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Message-ID: <ZJ7a4pvrjJbU2qjJ@corigine.com>
Date:   Fri, 30 Jun 2023 15:38:42 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Evan Quan <evan.quan@....com>
Cc:     rafael@...nel.org, lenb@...nel.org, Alexander.Deucher@....com,
        Christian.Koenig@....com, Xinhui.Pan@....com, airlied@...il.com,
        daniel@...ll.ch, johannes@...solutions.net, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        Mario.Limonciello@....com, mdaenzer@...hat.com,
        maarten.lankhorst@...ux.intel.com, tzimmermann@...e.de,
        hdegoede@...hat.com, jingyuwang_vip@....com, Lijo.Lazar@....com,
        jim.cromie@...il.com, bellosilicio@...il.com,
        andrealmeid@...lia.com, trix@...hat.com, jsg@....id.au,
        arnd@...db.de, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH V5 1/9] drivers core: Add support for Wifi band RF
 mitigations

On Fri, Jun 30, 2023 at 06:32:32PM +0800, Evan Quan wrote:

...

> diff --git a/include/linux/wbrf.h b/include/linux/wbrf.h
> new file mode 100644
> index 000000000000..3ca95786cef5
> --- /dev/null
> +++ b/include/linux/wbrf.h
> @@ -0,0 +1,65 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Wifi Band Exclusion Interface
> + * Copyright (C) 2023 Advanced Micro Devices
> + */
> +
> +#ifndef _LINUX_WBRF_H
> +#define _LINUX_WBRF_H
> +
> +#include <linux/device.h>
> +
> +/* Maximum number of wbrf ranges */
> +#define MAX_NUM_OF_WBRF_RANGES		11
> +
> +struct exclusion_range {
> +	/* start and end point of the frequency range in Hz */
> +	uint64_t	start;
> +	uint64_t	end;
> +};
> +
> +struct exclusion_range_pool {
> +	struct exclusion_range	band_list[MAX_NUM_OF_WBRF_RANGES];
> +	uint64_t		ref_counter[MAX_NUM_OF_WBRF_RANGES];
> +};
> +
> +struct wbrf_ranges_in {
> +	/* valid entry: `start` and `end` filled with non-zero values */
> +	struct exclusion_range	band_list[MAX_NUM_OF_WBRF_RANGES];
> +};
> +
> +struct wbrf_ranges_out {
> +	uint32_t		num_of_ranges;
> +	struct exclusion_range	band_list[MAX_NUM_OF_WBRF_RANGES];
> +} __packed;
> +
> +enum wbrf_notifier_actions {
> +	WBRF_CHANGED,
> +};

Hi Evan,

checkpatch suggests that u64 and u32 might be more appropriate types here,
as they are Kernel types, whereas the ones use are user-space types.

...