linux-kernel - Re: [PATCH v6 03/10] hisi_acc_qm: Move PCI device IDs to common header

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Message-ID: <20220228205537.GA520961@bhelgaas>
Date:   Mon, 28 Feb 2022 14:55:37 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Alex Williamson <alex.williamson@...hat.com>
Cc:     Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-crypto@...r.kernel.org, jgg@...dia.com, cohuck@...hat.com,
        mgurtovoy@...dia.com, yishaih@...dia.com, linuxarm@...wei.com,
        liulongfang@...wei.com, prime.zeng@...ilicon.com,
        jonathan.cameron@...wei.com, wangzhou1@...ilicon.com,
        bhelgaas@...gle.com, linux-pci@...r.kernel.org
Subject: Re: [PATCH v6 03/10] hisi_acc_qm: Move PCI device IDs to common
 header

On Mon, Feb 28, 2022 at 01:23:46PM -0700, Alex Williamson wrote:
> On Mon, 28 Feb 2022 14:12:59 -0600
> Bjorn Helgaas <helgaas@...nel.org> wrote:
> 
> > On Mon, Feb 28, 2022 at 10:33:38AM -0700, Alex Williamson wrote:
> > > [Cc+ Bjorn, linux-pci]
> > > 
> > > On Mon, 28 Feb 2022 09:01:14 +0000
> > > Shameer Kolothum <shameerali.kolothum.thodi@...wei.com> wrote:
> > >   
> > > > Move the PCI Device IDs of HiSilicon ACC devices to
> > > > a common header and use a uniform naming convention.  
> > 
> > > > --- a/include/linux/pci_ids.h
> > > > +++ b/include/linux/pci_ids.h
> > > > @@ -2529,6 +2529,12 @@
> > > >  #define PCI_DEVICE_ID_KORENIX_JETCARDF3	0x17ff
> > > >  
> > > >  #define PCI_VENDOR_ID_HUAWEI		0x19e5
> > > > +#define PCI_DEVICE_ID_HUAWEI_ZIP_PF	0xa250
> > > > +#define PCI_DEVICE_ID_HUAWEI_ZIP_VF	0xa251
> > > > +#define PCI_DEVICE_ID_HUAWEI_SEC_PF	0xa255
> > > > +#define PCI_DEVICE_ID_HUAWEI_SEC_VF	0xa256
> > > > +#define PCI_DEVICE_ID_HUAWEI_HPRE_PF	0xa258
> > > > +#define PCI_DEVICE_ID_HUAWEI_HPRE_VF	0xa259  
> > 
> > We usually don't add things to pci_ids.h unless they're used in more
> > than one place (see the comment at the top of the file).  AFAICT,
> > these device IDs are only used in one file, so you can leave the
> > #defines in the file that uses them or use bare hex values.
> 
> Later in this series the VF IDs are added to a vendor variant of the
> vfio-pci driver:
> 
> https://lore.kernel.org/all/20220228090121.1903-5-shameerali.kolothum.thodi@huawei.com/
> 
> diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> new file mode 100644
> index 000000000000..8129c3457b3b
> --- /dev/null
> +++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> ...
> +static const struct pci_device_id hisi_acc_vfio_pci_table[] = {
> +	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_SEC_VF) },
> +	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_HPRE_VF) },
> +	{ PCI_DRIVER_OVERRIDE_DEVICE_VFIO(PCI_VENDOR_ID_HUAWEI, PCI_DEVICE_ID_HUAWEI_ZIP_VF) },
> +	{ }
> +};
> 
> So I think the VFs IDs meet the requirements, but perhaps not the PF
> IDs.  Would it be ok if the PFs were dropped?  Thanks,

Sure :)

Bjorn