vDPA/ifcvf: decouple config space ops from the adapter

This commit decopules the config space ops from the
adapter layer, so these functions can be invoked
once the device is probed.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Cc: stable@vger.kernel.org
Message-Id: <20221125145724.1129962-3-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vdpa/ifcvf/ifcvf_base.c

@@ -10,11 +10,6 @@
 
 #include "ifcvf_base.h"
 
-struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw)
-{
-	return container_of(hw, struct ifcvf_adapter, vf);
-}
-
 u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector)
 {
 	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
@@ -37,8 +32,6 @@ u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector)
 static void __iomem *get_cap_addr(struct ifcvf_hw *hw,
 				  struct virtio_pci_cap *cap)
 {
-	struct ifcvf_adapter *ifcvf;
-	struct pci_dev *pdev;
 	u32 length, offset;
 	u8 bar;
 
@@ -46,17 +39,14 @@ static void __iomem *get_cap_addr(struct ifcvf_hw *hw,
 	offset = le32_to_cpu(cap->offset);
 	bar = cap->bar;
 
-	ifcvf= vf_to_adapter(hw);
-	pdev = ifcvf->pdev;
-
 	if (bar >= IFCVF_PCI_MAX_RESOURCE) {
-		IFCVF_DBG(pdev,
+		IFCVF_DBG(hw->pdev,
 			  "Invalid bar number %u to get capabilities\n", bar);
 		return NULL;
 	}
 
-	if (offset + length > pci_resource_len(pdev, bar)) {
-		IFCVF_DBG(pdev,
+	if (offset + length > pci_resource_len(hw->pdev, bar)) {
+		IFCVF_DBG(hw->pdev,
 			  "offset(%u) + len(%u) overflows bar%u's capability\n",
 			  offset, length, bar);
 		return NULL;
@@ -92,6 +82,7 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
 		IFCVF_ERR(pdev, "Failed to read PCI capability list\n");
 		return -EIO;
 	}
+	hw->pdev = pdev;
 
 	while (pos) {
 		ret = ifcvf_read_config_range(pdev, (u32 *)&cap,
@@ -230,13 +221,11 @@ int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features)
 
 u32 ifcvf_get_config_size(struct ifcvf_hw *hw)
 {
-	struct ifcvf_adapter *adapter;
 	u32 net_config_size = sizeof(struct virtio_net_config);
 	u32 blk_config_size = sizeof(struct virtio_blk_config);
 	u32 cap_size = hw->cap_dev_config_size;
 	u32 config_size;
 
-	adapter = vf_to_adapter(hw);
 	/* If the onboard device config space size is greater than
 	 * the size of struct virtio_net/blk_config, only the spec
 	 * implementing contents size is returned, this is very
@@ -251,7 +240,7 @@ u32 ifcvf_get_config_size(struct ifcvf_hw *hw)
 		break;
 	default:
 		config_size = 0;
-		IFCVF_ERR(adapter->pdev, "VIRTIO ID %u not supported\n", hw->dev_type);
+		IFCVF_ERR(hw->pdev, "VIRTIO ID %u not supported\n", hw->dev_type);
 	}
 
 	return config_size;