linux-kernel - Re: [PATCH v6] pci: loongson: Workaround MIPS firmware MRRS settings

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Date:   Fri, 8 Dec 2023 16:16:18 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Jiaxun Yang <jiaxun.yang@...goat.com>
Cc:     linux-pci@...r.kernel.org, lpieralisi@...nel.org, kw@...ux.com,
        robh@...nel.org, linux-kernel@...r.kernel.org,
        chenhuacai@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH v6] pci: loongson: Workaround MIPS firmware MRRS settings

On Fri, Dec 01, 2023 at 11:50:28AM +0000, Jiaxun Yang wrote:
> ...

> +		{ PCI_VDEVICE(LOONGSON, DEV_LS2K_PCIE_PORT0) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT0) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT1) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT2) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT3) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT4) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT5) },
> +		{ PCI_VDEVICE(LOONGSON, DEV_LS7A_PCIE_PORT6) },

P.S. I notice most of these Device IDs are not in the lspci database
at https://admin.pci-ids.ucw.cz/read/PC/0014.  It's easy to add them;
there's a link at the bottom of that page.

Some, e.g., 0x7a09 (DEV_LS7A_PCIE_PORT0), are described as "PCI-to-PCI
Bridge".  I had the impression these were Root Ports.  If so, the
description could be more specific.

Bjorn