vDPA/ifcvf: record virtio notify base

This commit records virtio notify base physical addr and
calculate doorbell physical address for vqs.
Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210602084550.289599-2-lingshan.zhu@intel.comSigned-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vdpa/ifcvf/ifcvf_base.c

@@ -133,6 +133,8 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
 					      &hw->notify_off_multiplier);
 			hw->notify_bar = cap.bar;
 			hw->notify_base = get_cap_addr(hw, &cap);
+			hw->notify_base_pa = pci_resource_start(pdev, cap.bar) +
+					le32_to_cpu(cap.offset);
 			IFCVF_DBG(pdev, "hw->notify_base = %p\n",
 				  hw->notify_base);
 			break;
@@ -161,6 +163,8 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
 		notify_off = ifc_ioread16(&hw->common_cfg->queue_notify_off);
 		hw->vring[i].notify_addr = hw->notify_base +
 			notify_off * hw->notify_off_multiplier;
+		hw->vring[i].notify_pa = hw->notify_base_pa +
+			notify_off * hw->notify_off_multiplier;
 	}
 
 	hw->lm_cfg = hw->base[IFCVF_LM_BAR];

drivers/vdpa/ifcvf/ifcvf_base.h

@@ -73,6 +73,7 @@ struct vring_info {
 	u16 last_avail_idx;
 	bool ready;
 	void __iomem *notify_addr;
+	phys_addr_t notify_pa;
 	u32 irq;
 	struct vdpa_callback cb;
 	char msix_name[256];
@@ -87,6 +88,7 @@ struct ifcvf_hw {
 	u8 notify_bar;
 	/* Notificaiton bar address */
 	void __iomem *notify_base;
+	phys_addr_t notify_base_pa;
 	u32 notify_off_multiplier;
 	u64 req_features;
 	u64 hw_features;