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

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Date:   Tue, 3 Aug 2021 05:58:08 +0000
From:   "Wasim Khan (OSS)" <wasim.khan@....nxp.com>
To:     Bjorn Helgaas <helgaas@...nel.org>,
        "Wasim Khan (OSS)" <wasim.khan@....nxp.com>
CC:     "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Varun Sethi <V.Sethi@....com>
Subject: RE: [PATCH v2] PCI: Add ACS quirk for NXP LX2160 and LX2162 C/E/N
 platforms



> -----Original Message-----
> From: Bjorn Helgaas <helgaas@...nel.org>
> Sent: Monday, August 2, 2021 9:35 PM
> To: Wasim Khan (OSS) <wasim.khan@....nxp.com>
> Cc: bhelgaas@...gle.com; linux-pci@...r.kernel.org; linux-
> kernel@...r.kernel.org; Varun Sethi <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.

Thank you for the review.
Sure, I will associate them with device IDs and send updated version.

> 
> > 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
> >