This commit deduces VIRTIO device ID as device type when probe, then ifcvf_vdpa_get_device_id() can simply return the ID. ifcvf_vdpa_get_features() and ifcvf_vdpa_get_config_size() can work properly based on the device ID.
Signed-off-by: Zhu Lingshan <lingshan....@intel.com> --- drivers/vdpa/ifcvf/ifcvf_base.h | 1 + drivers/vdpa/ifcvf/ifcvf_main.c | 30 ++++++++++++++++++------------ 2 files changed, 19 insertions(+), 12 deletions(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h index b2eeb16b9c2c..1c04cd256fa7 100644 --- a/drivers/vdpa/ifcvf/ifcvf_base.h +++ b/drivers/vdpa/ifcvf/ifcvf_base.h @@ -84,6 +84,7 @@ struct ifcvf_hw { u32 notify_off_multiplier; u64 req_features; u64 hw_features; + u32 dev_type; struct virtio_pci_common_cfg __iomem *common_cfg; void __iomem *net_cfg; struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2]; diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 44d7586019da..469a9b5737b7 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -323,19 +323,9 @@ static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev) static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev) { - struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev); - struct pci_dev *pdev = adapter->pdev; - u32 ret = -ENODEV; - - if (pdev->device < 0x1000 || pdev->device > 0x107f) - return ret; - - if (pdev->device < 0x1040) - ret = pdev->subsystem_device; - else - ret = pdev->device - 0x1040; + struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev); - return ret; + return vf->dev_type; } static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev) @@ -466,6 +456,22 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_drvdata(pdev, adapter); vf = &adapter->vf; + + /* This drirver drives both modern virtio devices and transitional + * devices in modern mode. + * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM, + * so legacy devices and transitional devices in legacy + * mode will not work for vDPA, this driver will not + * drive devices with legacy interface. + */ + if (pdev->device < 0x1000 || pdev->device > 0x107f) + return -EOPNOTSUPP; + + if (pdev->device < 0x1040) + vf->dev_type = pdev->subsystem_device; + else + vf->dev_type = pdev->device - 0x1040; + vf->base = pcim_iomap_table(pdev); adapter->pdev = pdev; -- 2.27.0