Re: [PATCH V3 1/2] vDPA/ifcvf: record virtio notify base

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在 2021/6/1 下午2:28, Zhu Lingshan 写道:
This commit records virtio notify base physical addr and
calculate doorbell physical address for vqs.

Signed-off-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxx>


Acked-by: Jason Wang <jasowang@xxxxxxxxxx>


---
  drivers/vdpa/ifcvf/ifcvf_base.c | 4 ++++
  drivers/vdpa/ifcvf/ifcvf_base.h | 2 ++
  2 files changed, 6 insertions(+)

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index 1a661ab45af5..6e197fe0fcf9 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/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];
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 0111bfdeb342..447f4ad9c0bf 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/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;




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