| Message ID | 20210308083525.382514-3-lingshan.zhu@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vDPA/ifcvf: enables Intel C5000X-PL virtio-net | expand |
On 2021/3/8 4:35 下午, Zhu Lingshan wrote: > This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-net > for vDPA > > Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> > --- > drivers/vdpa/ifcvf/ifcvf_base.h | 5 +++++ > drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++ > 2 files changed, 10 insertions(+) > > diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h > index 64696d63fe07..75d9a8052039 100644 > --- a/drivers/vdpa/ifcvf/ifcvf_base.h > +++ b/drivers/vdpa/ifcvf/ifcvf_base.h > @@ -23,6 +23,11 @@ > #define IFCVF_SUBSYS_VENDOR_ID 0x8086 > #define IFCVF_SUBSYS_DEVICE_ID 0x001A > > +#define C5000X_PL_VENDOR_ID 0x1AF4 > +#define C5000X_PL_DEVICE_ID 0x1000 > +#define C5000X_PL_SUBSYS_VENDOR_ID 0x8086 > +#define C5000X_PL_SUBSYS_DEVICE_ID 0x0001 I just notice that the device is a transtitional one. Any reason for doing this? Note that IFCVF is a moden device anyhow (0x1041). Supporting legacy drive may bring many issues (e.g the definition is non-nomartive). One example is the support of VIRTIO_F_IOMMU_PLATFORM, legacy driver may assume the device can bypass IOMMU. Thanks > + > #define IFCVF_SUPPORTED_FEATURES \ > ((1ULL << VIRTIO_NET_F_MAC) | \ > (1ULL << VIRTIO_F_ANY_LAYOUT) | \ > diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c > index e501ee07de17..26a2dab7ca66 100644 > --- a/drivers/vdpa/ifcvf/ifcvf_main.c > +++ b/drivers/vdpa/ifcvf/ifcvf_main.c > @@ -484,6 +484,11 @@ static struct pci_device_id ifcvf_pci_ids[] = { > IFCVF_DEVICE_ID, > IFCVF_SUBSYS_VENDOR_ID, > IFCVF_SUBSYS_DEVICE_ID) }, > + { PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID, > + C5000X_PL_DEVICE_ID, > + C5000X_PL_SUBSYS_VENDOR_ID, > + C5000X_PL_SUBSYS_DEVICE_ID) }, > + > { 0 }, > }; > MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
On 3/9/2021 10:23 AM, Jason Wang wrote: > > On 2021/3/8 4:35 下午, Zhu Lingshan wrote: >> This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-net >> for vDPA >> >> Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> >> --- >> drivers/vdpa/ifcvf/ifcvf_base.h | 5 +++++ >> drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++ >> 2 files changed, 10 insertions(+) >> >> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h >> b/drivers/vdpa/ifcvf/ifcvf_base.h >> index 64696d63fe07..75d9a8052039 100644 >> --- a/drivers/vdpa/ifcvf/ifcvf_base.h >> +++ b/drivers/vdpa/ifcvf/ifcvf_base.h >> @@ -23,6 +23,11 @@ >> #define IFCVF_SUBSYS_VENDOR_ID 0x8086 >> #define IFCVF_SUBSYS_DEVICE_ID 0x001A >> +#define C5000X_PL_VENDOR_ID 0x1AF4 >> +#define C5000X_PL_DEVICE_ID 0x1000 >> +#define C5000X_PL_SUBSYS_VENDOR_ID 0x8086 >> +#define C5000X_PL_SUBSYS_DEVICE_ID 0x0001 > > > I just notice that the device is a transtitional one. Any reason for > doing this? > > Note that IFCVF is a moden device anyhow (0x1041). Supporting legacy > drive may bring many issues (e.g the definition is non-nomartive). One > example is the support of VIRTIO_F_IOMMU_PLATFORM, legacy driver may > assume the device can bypass IOMMU. > > Thanks Hi Jason, This device will support virtio1.0 by default, so has VIRTIO_F_IOMMU_PLATFORM by default. Transitional device gives the software a chance to fall back to virtio 0.95. ifcvf drives this device in virtio 1.0 mode, set features VIRTIO_F_IOMMU_PLATFORM successfully. Thanks, Zhu Lingshan > > >> + >> #define IFCVF_SUPPORTED_FEATURES \ >> ((1ULL << VIRTIO_NET_F_MAC) | \ >> (1ULL << VIRTIO_F_ANY_LAYOUT) | \ >> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c >> b/drivers/vdpa/ifcvf/ifcvf_main.c >> index e501ee07de17..26a2dab7ca66 100644 >> --- a/drivers/vdpa/ifcvf/ifcvf_main.c >> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c >> @@ -484,6 +484,11 @@ static struct pci_device_id ifcvf_pci_ids[] = { >> IFCVF_DEVICE_ID, >> IFCVF_SUBSYS_VENDOR_ID, >> IFCVF_SUBSYS_DEVICE_ID) }, >> + { PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID, >> + C5000X_PL_DEVICE_ID, >> + C5000X_PL_SUBSYS_VENDOR_ID, >> + C5000X_PL_SUBSYS_DEVICE_ID) }, >> + >> { 0 }, >> }; >> MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids); >
On 2021/3/9 10:28 上午, Zhu, Lingshan wrote: > > > On 3/9/2021 10:23 AM, Jason Wang wrote: >> >> On 2021/3/8 4:35 下午, Zhu Lingshan wrote: >>> This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-net >>> for vDPA >>> >>> Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> >>> --- >>> drivers/vdpa/ifcvf/ifcvf_base.h | 5 +++++ >>> drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++ >>> 2 files changed, 10 insertions(+) >>> >>> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h >>> b/drivers/vdpa/ifcvf/ifcvf_base.h >>> index 64696d63fe07..75d9a8052039 100644 >>> --- a/drivers/vdpa/ifcvf/ifcvf_base.h >>> +++ b/drivers/vdpa/ifcvf/ifcvf_base.h >>> @@ -23,6 +23,11 @@ >>> #define IFCVF_SUBSYS_VENDOR_ID 0x8086 >>> #define IFCVF_SUBSYS_DEVICE_ID 0x001A >>> +#define C5000X_PL_VENDOR_ID 0x1AF4 >>> +#define C5000X_PL_DEVICE_ID 0x1000 >>> +#define C5000X_PL_SUBSYS_VENDOR_ID 0x8086 >>> +#define C5000X_PL_SUBSYS_DEVICE_ID 0x0001 >> >> >> I just notice that the device is a transtitional one. Any reason for >> doing this? >> >> Note that IFCVF is a moden device anyhow (0x1041). Supporting legacy >> drive may bring many issues (e.g the definition is non-nomartive). >> One example is the support of VIRTIO_F_IOMMU_PLATFORM, legacy driver >> may assume the device can bypass IOMMU. >> >> Thanks > Hi Jason, > > This device will support virtio1.0 by default, so has > VIRTIO_F_IOMMU_PLATFORM by default. If you device want to force VIRTIO_F_IOMMU_PLATFORM you probably need to do what has been done by mlx5 (verify_min_features). According to the spec, if VIRTIO_F_IOMMU_PLATFORM is not mandatory, when it's not negotiated, device needs to disable or bypass IOMMU: " If this feature bit is set to 0, then the device has same access to memory addresses supplied to it as the driver has. In particular, the device will always use physical addresses matching addresses used by the driver (typically meaning physical addresses used by the CPU) and not translated further, and can access any address supplied to it by the driver. " > Transitional device gives the software a chance to fall back to virtio > 0.95. This only applies if you want to passthrough the card to guest directly without the help of vDPA. If we go with vDPA, it doesn't hlep. For virtio-vdpa, we know it will negotiated IOMMU_PLATFORM. For vhost-vdpa, Qemu can provide a legacy or transitional device on top of a modern vDPA device. Thanks > ifcvf drives this device in virtio 1.0 mode, set features > VIRTIO_F_IOMMU_PLATFORM successfully. > > Thanks, > Zhu Lingshan >> >> >>> + >>> #define IFCVF_SUPPORTED_FEATURES \ >>> ((1ULL << VIRTIO_NET_F_MAC) | \ >>> (1ULL << VIRTIO_F_ANY_LAYOUT) | \ >>> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c >>> b/drivers/vdpa/ifcvf/ifcvf_main.c >>> index e501ee07de17..26a2dab7ca66 100644 >>> --- a/drivers/vdpa/ifcvf/ifcvf_main.c >>> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c >>> @@ -484,6 +484,11 @@ static struct pci_device_id ifcvf_pci_ids[] = { >>> IFCVF_DEVICE_ID, >>> IFCVF_SUBSYS_VENDOR_ID, >>> IFCVF_SUBSYS_DEVICE_ID) }, >>> + { PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID, >>> + C5000X_PL_DEVICE_ID, >>> + C5000X_PL_SUBSYS_VENDOR_ID, >>> + C5000X_PL_SUBSYS_DEVICE_ID) }, >>> + >>> { 0 }, >>> }; >>> MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids); >> >
On 3/9/2021 10:42 AM, Jason Wang wrote: > > On 2021/3/9 10:28 上午, Zhu, Lingshan wrote: >> >> >> On 3/9/2021 10:23 AM, Jason Wang wrote: >>> >>> On 2021/3/8 4:35 下午, Zhu Lingshan wrote: >>>> This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-net >>>> for vDPA >>>> >>>> Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> >>>> --- >>>> drivers/vdpa/ifcvf/ifcvf_base.h | 5 +++++ >>>> drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++ >>>> 2 files changed, 10 insertions(+) >>>> >>>> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h >>>> b/drivers/vdpa/ifcvf/ifcvf_base.h >>>> index 64696d63fe07..75d9a8052039 100644 >>>> --- a/drivers/vdpa/ifcvf/ifcvf_base.h >>>> +++ b/drivers/vdpa/ifcvf/ifcvf_base.h >>>> @@ -23,6 +23,11 @@ >>>> #define IFCVF_SUBSYS_VENDOR_ID 0x8086 >>>> #define IFCVF_SUBSYS_DEVICE_ID 0x001A >>>> +#define C5000X_PL_VENDOR_ID 0x1AF4 >>>> +#define C5000X_PL_DEVICE_ID 0x1000 >>>> +#define C5000X_PL_SUBSYS_VENDOR_ID 0x8086 >>>> +#define C5000X_PL_SUBSYS_DEVICE_ID 0x0001 >>> >>> >>> I just notice that the device is a transtitional one. Any reason for >>> doing this? >>> >>> Note that IFCVF is a moden device anyhow (0x1041). Supporting legacy >>> drive may bring many issues (e.g the definition is non-nomartive). >>> One example is the support of VIRTIO_F_IOMMU_PLATFORM, legacy driver >>> may assume the device can bypass IOMMU. >>> >>> Thanks >> Hi Jason, >> >> This device will support virtio1.0 by default, so has >> VIRTIO_F_IOMMU_PLATFORM by default. > > > If you device want to force VIRTIO_F_IOMMU_PLATFORM you probably need > to do what has been done by mlx5 (verify_min_features). > > According to the spec, if VIRTIO_F_IOMMU_PLATFORM is not mandatory, > when it's not negotiated, device needs to disable or bypass IOMMU: > > > " > > If this feature bit is set to 0, then the device has same access to > memory addresses supplied to it as the driver has. In particular, the > device will always use physical addresses matching addresses used by > the driver (typically meaning physical addresses used by the CPU) and > not translated further, and can access any address supplied to it by > the driver. > > " sure, I can implement code to check the feature bits. > > >> Transitional device gives the software a chance to fall back to >> virtio 0.95. > > > This only applies if you want to passthrough the card to guest > directly without the help of vDPA. > > If we go with vDPA, it doesn't hlep. For virtio-vdpa, we know it will > negotiated IOMMU_PLATFORM. For vhost-vdpa, Qemu can provide a legacy > or transitional device on top of a modern vDPA device. > > Thanks For some cases, users may run quite out of date OS does not have vDPA nor virtio 1.0 support, transitional characters give them a chance to use the devices. Thanks Zhu Lingshan > > >> ifcvf drives this device in virtio 1.0 mode, set features >> VIRTIO_F_IOMMU_PLATFORM successfully. >> >> Thanks, >> Zhu Lingshan >>> >>> >>>> + >>>> #define IFCVF_SUPPORTED_FEATURES \ >>>> ((1ULL << VIRTIO_NET_F_MAC) | \ >>>> (1ULL << VIRTIO_F_ANY_LAYOUT) | \ >>>> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c >>>> b/drivers/vdpa/ifcvf/ifcvf_main.c >>>> index e501ee07de17..26a2dab7ca66 100644 >>>> --- a/drivers/vdpa/ifcvf/ifcvf_main.c >>>> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c >>>> @@ -484,6 +484,11 @@ static struct pci_device_id ifcvf_pci_ids[] = { >>>> IFCVF_DEVICE_ID, >>>> IFCVF_SUBSYS_VENDOR_ID, >>>> IFCVF_SUBSYS_DEVICE_ID) }, >>>> + { PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID, >>>> + C5000X_PL_DEVICE_ID, >>>> + C5000X_PL_SUBSYS_VENDOR_ID, >>>> + C5000X_PL_SUBSYS_DEVICE_ID) }, >>>> + >>>> { 0 }, >>>> }; >>>> MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids); >>> >> >
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h index 64696d63fe07..75d9a8052039 100644 --- a/drivers/vdpa/ifcvf/ifcvf_base.h +++ b/drivers/vdpa/ifcvf/ifcvf_base.h @@ -23,6 +23,11 @@ #define IFCVF_SUBSYS_VENDOR_ID 0x8086 #define IFCVF_SUBSYS_DEVICE_ID 0x001A +#define C5000X_PL_VENDOR_ID 0x1AF4 +#define C5000X_PL_DEVICE_ID 0x1000 +#define C5000X_PL_SUBSYS_VENDOR_ID 0x8086 +#define C5000X_PL_SUBSYS_DEVICE_ID 0x0001 + #define IFCVF_SUPPORTED_FEATURES \ ((1ULL << VIRTIO_NET_F_MAC) | \ (1ULL << VIRTIO_F_ANY_LAYOUT) | \ diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index e501ee07de17..26a2dab7ca66 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -484,6 +484,11 @@ static struct pci_device_id ifcvf_pci_ids[] = { IFCVF_DEVICE_ID, IFCVF_SUBSYS_VENDOR_ID, IFCVF_SUBSYS_DEVICE_ID) }, + { PCI_DEVICE_SUB(C5000X_PL_VENDOR_ID, + C5000X_PL_DEVICE_ID, + C5000X_PL_SUBSYS_VENDOR_ID, + C5000X_PL_SUBSYS_DEVICE_ID) }, + { 0 }, }; MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-net for vDPA Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> --- drivers/vdpa/ifcvf/ifcvf_base.h | 5 +++++ drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++++ 2 files changed, 10 insertions(+)