RE: [PATCH v2] vdpa/ifc: Match ANY subsystem IDs for modern virtio devices

["Pei, Andy" <andy.pei@intel.com>]

Hi Abhishek,

I agree with Xiao.
I think it will be better you just add subvendor and subdevice you want to be take care of by this vdpa driver.

> -----Original Message-----
> From: Wang, Xiao W <xiao.w.wang@intel.com>
> Sent: Thursday, December 8, 2022 9:09 PM
> To: Maheshwari, Abhishek <Abhishek.Maheshwari@intel.com>
> Cc: dev@dpdk.org; stable@dpdk.org; Xia, Chenbo <Chenbo.Xia@intel.com>;
> Mandal, Purna Chandra <Purna.Chandra.Mandal@intel.com>; Pei, Andy
> <andy.pei@intel.com>
> Subject: RE: [PATCH v2] vdpa/ifc: Match ANY subsystem IDs for modern virtio
> devices
> 
> Hi Abhishek,
> 
> Please see comments inline.
> 
> BRs,
> Xiao
> 
> > -----Original Message-----
> > From: Maheshwari, Abhishek <abhishek.maheshwari@intel.com>
> > Sent: Tuesday, December 6, 2022 8:55 PM
> > To: Wang, Xiao W <xiao.w.wang@intel.com>
> > Cc: dev@dpdk.org; stable@dpdk.org; Xia, Chenbo <chenbo.xia@intel.com>;
> > Mandal, Purna Chandra <purna.chandra.mandal@intel.com>; Maheshwari,
> > Abhishek <abhishek.maheshwari@intel.com>
> > Subject: [PATCH v2] vdpa/ifc: Match ANY subsystem IDs for modern
> > virtio devices
> >
> > Fixing the match table for vdpa/ifcvf driver because as per the Virtio
> > device specification, for modern virtio devices, drivers MAY match any
> > PCI Subsystem Vendor ID and any PCI Subsystem Device ID value.
> 
> Here the "drivers" refers to virtio driver, not vdpa driver.
> With below change, this vdpa/ifc driver would hit the standard virtio device
> which can't 100% match this driver.
> 
> >
> > Fixes: a60b747d0ad ("vdpa/ifc: support virtio block device")
> > Fixes: 5c806b94785 ("vdpa/ifc: add PCI ID for legacy network device")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Abhishek Maheshwari <abhishek.maheshwari@intel.com>
> > ---
> >  drivers/vdpa/ifc/ifcvf_vdpa.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/drivers/vdpa/ifc/ifcvf_vdpa.c
> > b/drivers/vdpa/ifc/ifcvf_vdpa.c index 49d68ad1b1..214d6e1f60 100644
> > --- a/drivers/vdpa/ifc/ifcvf_vdpa.c
> > +++ b/drivers/vdpa/ifc/ifcvf_vdpa.c
> > @@ -1824,8 +1824,8 @@ static const struct rte_pci_id pci_id_ifcvf_map[] = {
> >  	{ .class_id = RTE_CLASS_ANY_ID,
> >  	  .vendor_id = IFCVF_VENDOR_ID,
> >  	  .device_id = IFCVF_NET_MODERN_DEVICE_ID,
> > -	  .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
> > -	  .subsystem_device_id = IFCVF_SUBSYS_DEVICE_ID,
> > +	  .subsystem_vendor_id = RTE_PCI_ANY_ID,
> > +	  .subsystem_device_id = RTE_PCI_ANY_ID,
> >  	},
> >
> >  	{ .class_id = RTE_CLASS_ANY_ID,
> > @@ -1845,8 +1845,8 @@ static const struct rte_pci_id pci_id_ifcvf_map[] = {
> >  	{ .class_id = RTE_CLASS_ANY_ID,
> >  	  .vendor_id = IFCVF_VENDOR_ID,
> >  	  .device_id = IFCVF_BLK_MODERN_DEVICE_ID,
> > -	  .subsystem_vendor_id = IFCVF_SUBSYS_VENDOR_ID,
> > -	  .subsystem_device_id = IFCVF_SUBSYS_BLK_DEVICE_ID,
> > +	  .subsystem_vendor_id = RTE_PCI_ANY_ID,
> > +	  .subsystem_device_id = RTE_PCI_ANY_ID,
> >  	},
> >
> >  	{ .vendor_id = 0, /* sentinel */
> > --
> > 2.31.1