vDPA/ifcvf: decouple hw features manipulators from the adapter

This commit gets rid of ifcvf_adapter in hw features related
functions in ifcvf_base. Then these functions are more rubust
and de-coupling from the ifcvf_adapter layer. So these
functions could be invoded once the device is probed, even
before the adapter is allocaed.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Cc: stable@vger.kernel.org
Message-Id: <20221125145724.1129962-2-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vdpa/ifcvf/ifcvf_base.c

@@ -220,10 +220,8 @@ u64 ifcvf_get_features(struct ifcvf_hw *hw)
 
 int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features)
 {
-	struct ifcvf_adapter *ifcvf = vf_to_adapter(hw);
-
 	if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)) && features) {
-		IFCVF_ERR(ifcvf->pdev, "VIRTIO_F_ACCESS_PLATFORM is not negotiated\n");
+		IFCVF_ERR(hw->pdev, "VIRTIO_F_ACCESS_PLATFORM is not negotiated\n");
 		return -EINVAL;
 	}
 
@@ -301,14 +299,11 @@ static void ifcvf_set_features(struct ifcvf_hw *hw, u64 features)
 
 static int ifcvf_config_features(struct ifcvf_hw *hw)
 {
-	struct ifcvf_adapter *ifcvf;
-
-	ifcvf = vf_to_adapter(hw);
 	ifcvf_set_features(hw, hw->req_features);
 	ifcvf_add_status(hw, VIRTIO_CONFIG_S_FEATURES_OK);
 
 	if (!(ifcvf_get_status(hw) & VIRTIO_CONFIG_S_FEATURES_OK)) {
-		IFCVF_ERR(ifcvf->pdev, "Failed to set FEATURES_OK status\n");
+		IFCVF_ERR(hw->pdev, "Failed to set FEATURES_OK status\n");
 		return -EIO;
 	}
 

drivers/vdpa/ifcvf/ifcvf_base.h

@@ -89,6 +89,7 @@ struct ifcvf_hw {
 	u16 nr_vring;
 	/* VIRTIO_PCI_CAP_DEVICE_CFG size */
 	u32 cap_dev_config_size;
+	struct pci_dev *pdev;
 };
 
 struct ifcvf_adapter {

drivers/vdpa/ifcvf/ifcvf_main.c

@@ -842,6 +842,7 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	vf = &adapter->vf;
 	vf->dev_type = get_dev_type(pdev);
 	vf->base = pcim_iomap_table(pdev);
+	vf->pdev = pdev;
 
 	adapter->pdev = pdev;
 	adapter->vdpa.dma_dev = &pdev->dev;