Re: [PATCH V4 2/3] vDPA/ifcvf: enable Intel C5000X-PL virtio-block for vDPA

["Zhu, Lingshan" <lingshan.zhu@xxxxxxxxx>]

On 5/3/2021 4:47 PM, Michael S. Tsirkin wrote:
> On Mon, Apr 19, 2021 at 02:33:25PM +0800, Zhu Lingshan wrote:
> > This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-block
> > for vDPA.
> >
> > Signed-off-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxx>
> > Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
> > Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
> > ---
> >   drivers/vdpa/ifcvf/ifcvf_base.h |  8 +++++++-
> >   drivers/vdpa/ifcvf/ifcvf_main.c | 19 ++++++++++++++++++-
> >   2 files changed, 25 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
> > index 1c04cd256fa7..0111bfdeb342 100644
> > --- a/drivers/vdpa/ifcvf/ifcvf_base.h
> > +++ b/drivers/vdpa/ifcvf/ifcvf_base.h
> > @@ -15,6 +15,7 @@
> >   #include <linux/pci_regs.h>
> >   #include <linux/vdpa.h>
> >   #include <uapi/linux/virtio_net.h>
> > +#include <uapi/linux/virtio_blk.h>
> >   #include <uapi/linux/virtio_config.h>
> >   #include <uapi/linux/virtio_pci.h>
> >   
> > @@ -28,7 +29,12 @@
> >   #define C5000X_PL_SUBSYS_VENDOR_ID	0x8086
> >   #define C5000X_PL_SUBSYS_DEVICE_ID	0x0001
> >   
> > -#define IFCVF_SUPPORTED_FEATURES \
> > +#define C5000X_PL_BLK_VENDOR_ID		0x1AF4
>
> Come on this is just PCI_VENDOR_ID_REDHAT_QUMRANET right?
Hi Michael,

I will re-use the predefined macro in next patches

#define C5000X_PL_BLK_VENDOR_ID	  PCI_VENDOR_ID_REDHAT_QUMRANET
#define C5000X_PL_BLK_SUBSYS_DEVICE_ID	VIRTIO_ID_BLOCK?

to keep the readabilities in probe().

> > +#define C5000X_PL_BLK_DEVICE_ID		0x1001
> 0x1001 is a transitional blk device from virtio spec too right? Let's add these to virtio_ids.h?
will update virtio_ids.h in next patchset.

Thanks
Zhu Lingshan
> > +#define C5000X_PL_BLK_SUBSYS_VENDOR_ID	0x8086
> > +#define C5000X_PL_BLK_SUBSYS_DEVICE_ID	0x0002
> VIRTIO_ID_BLOCK?
>
> > +
> > +#define IFCVF_NET_SUPPORTED_FEATURES \
> >   		((1ULL << VIRTIO_NET_F_MAC)			| \
> >   		 (1ULL << VIRTIO_F_ANY_LAYOUT)			| \
> >   		 (1ULL << VIRTIO_F_VERSION_1)			| \
> > diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
> > index 66927ec81fa5..9a4a6df91f08 100644
> > --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> > +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> > @@ -168,10 +168,23 @@ static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
> >   
> >   static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
> >   {
> > +	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
> >   	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
> > +	struct pci_dev *pdev = adapter->pdev;
> > +
> >   	u64 features;
> >   
> > -	features = ifcvf_get_features(vf) & IFCVF_SUPPORTED_FEATURES;
> > +	switch (vf->dev_type) {
> > +	case VIRTIO_ID_NET:
> > +		features = ifcvf_get_features(vf) & IFCVF_NET_SUPPORTED_FEATURES;
> > +		break;
> > +	case VIRTIO_ID_BLOCK:
> > +		features = ifcvf_get_features(vf);
> > +		break;
> > +	default:
> > +		features = 0;
> > +		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
> > +	}
> >   
> >   	return features;
> >   }
> > @@ -514,6 +527,10 @@ static struct pci_device_id ifcvf_pci_ids[] = {
> >   			 C5000X_PL_DEVICE_ID,
> >   			 C5000X_PL_SUBSYS_VENDOR_ID,
> >   			 C5000X_PL_SUBSYS_DEVICE_ID) },
> > +	{ PCI_DEVICE_SUB(C5000X_PL_BLK_VENDOR_ID,
> > +			 C5000X_PL_BLK_DEVICE_ID,
> > +			 C5000X_PL_BLK_SUBSYS_VENDOR_ID,
> > +			 C5000X_PL_BLK_SUBSYS_DEVICE_ID) },
> >   
> >   	{ 0 },
> >   };
> > --
> > 2.27.0