Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.37 as permitted sender) client-ip=23.128.96.37;
Date:   Sun, 5 Nov 2023 18:39:46 +0100
From:   Lukas Wunner <lukas@wunner.de>
To:     Mario Limonciello <mario.limonciello@amd.com>
Cc:     Karol Herbst <kherbst@redhat.com>, Lyude Paul <lyude@redhat.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Christian =?iso-8859-1?Q?K=F6nig?= <christian.koenig@amd.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Hans de Goede <hdegoede@redhat.com>,
        Ilpo =?iso-8859-1?Q?J=E4rvinen?= <ilpo.jarvinen@linux.intel.com>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Danilo Krummrich <dakr@redhat.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Xinhui Pan <Xinhui.Pan@amd.com>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Mark Gross <markgross@kernel.org>,
        Andreas Noever <andreas.noever@gmail.com>,
        Michael Jamet <michael.jamet@intel.com>,
        Yehezkel Bernat <YehezkelShB@gmail.com>,
        Pali =?iso-8859-1?Q?Roh=E1r?= <pali@kernel.org>,
        Marek =?iso-8859-1?Q?Beh=FAn?= <kabel@kernel.org>,
        "Maciej W . Rozycki" <macro@orcam.me.uk>,
        Manivannan Sadhasivam <mani@kernel.org>,
        "open list:DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS" 
        <dri-devel@lists.freedesktop.org>,
        "open list:DRM DRIVER FOR NVIDIA GEFORCE/QUADRO GPUS" 
        <nouveau@lists.freedesktop.org>,
        open list <linux-kernel@vger.kernel.org>,
        "open list:RADEON and AMDGPU DRM DRIVERS" 
        <amd-gfx@lists.freedesktop.org>,
        "open list:PCI SUBSYSTEM" <linux-pci@vger.kernel.org>,
        "open list:ACPI" <linux-acpi@vger.kernel.org>,
        "open list:X86 PLATFORM DRIVERS" 
        <platform-driver-x86@vger.kernel.org>,
        "open list:THUNDERBOLT DRIVER" <linux-usb@vger.kernel.org>
Subject: Re: [PATCH v2 6/9] PCI: Rename is_thunderbolt to is_tunneled
Message-ID: <20231105173946.GA31955@wunner.de>
References: <20231103190758.82911-1-mario.limonciello@amd.com>
 <20231103190758.82911-7-mario.limonciello@amd.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20231103190758.82911-7-mario.limonciello@amd.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk

On Fri, Nov 03, 2023 at 02:07:55PM -0500, Mario Limonciello wrote:
> The `is_thunderbolt` bit has been used to indicate that a PCIe device
> contained the Intel VSEC which is used by various parts of the kernel
> to change behavior. To later allow usage with USB4 controllers as well,
> rename this to `is_tunneled`.

This doesn't seem to make sense.  is_thunderbolt indicates that a device
is part of a Thunderbolt controller.  See the code comment:

> -	unsigned int	is_thunderbolt:1;	/* Thunderbolt controller */

A Thunderbolt controller is not necessarily tunneled.  The PCIe switch,
NHI and XHCI of the Thunderbolt host controller are not tunneled at all.

Thanks,

Lukas