linux-kernel - Re: [PATCH v2] PCI: Add ACS quirk for NXP LX2160 and LX2162 C/E/N platforms

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Message-ID: <20210802160434.GA1383714@bjorn-Precision-5520>
Date:   Mon, 2 Aug 2021 11:04:34 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Wasim Khan <wasim.khan@....nxp.com>
Cc:     bhelgaas@...gle.com, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, V.Sethi@....com,
        Wasim Khan <wasim.khan@....com>
Subject: Re: [PATCH v2] PCI: Add ACS quirk for NXP LX2160 and LX2162 C/E/N
 platforms

On Mon, Aug 02, 2021 at 05:56:44PM +0200, Wasim Khan wrote:
> From: Wasim Khan <wasim.khan@....com>
> 
> LX2160C : security features + CAN-FD
> LX2160E : security features + CAN
> LX2160N : without security features + CAN
> LX2162C : security features + CAN-FD
> LX2162E : security features + CAN
> LX2162N : without security features + CAN

Can you associate these with the device IDs, please?  Ideally a
one-line comment in the code, but if that doesn't fit nicely, at least
include the device ID for each here in the commit log.

> Root Ports in NXP LX2160 and LX2162 where each Root Port
> is a Root Complex with unique segment numbers do provide
> isolation features to disable peer transactions and
> validate bus numbers in requests, but do not provide an
> actual PCIe ACS capability.
> 
> Enable ACS quirk for NXP LX2160C/E/N and LX2162C/E/N platforms
> 
> Signed-off-by: Wasim Khan <wasim.khan@....com>
> ---
> Changes in v2:
> - removed duplicate entry of 0x8d80 and 0x8d88
> 
>  drivers/pci/quirks.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 24343a76c034..1ad158066d39 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -4787,6 +4787,23 @@ static const struct pci_dev_acs_enabled {
>  	{ PCI_VENDOR_ID_NXP, 0x8d80, pci_quirk_nxp_rp_acs },
>  	{ PCI_VENDOR_ID_NXP, 0x8d88, pci_quirk_nxp_rp_acs },
>  	{ PCI_VENDOR_ID_NXP, 0x8d89, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d90, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d91, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8da1, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8db0, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d92, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d82, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d93, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8da0, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8db1, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d99, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d8a, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d9b, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8da8, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8db9, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d98, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8db8, pci_quirk_nxp_rp_acs },
> +	{ PCI_VENDOR_ID_NXP, 0x8d9a, pci_quirk_nxp_rp_acs },

Sort these in order of device ID so it's easier to see duplicates and
to find the one you're looking for.

>  	/* Zhaoxin Root/Downstream Ports */
>  	{ PCI_VENDOR_ID_ZHAOXIN, PCI_ANY_ID, pci_quirk_zhaoxin_pcie_ports_acs },
>  	{ 0 }
> -- 
> 2.25.1
>