在 2021/4/28 下午4:21, Zhu Lingshan 写道:
This commit records virtio notify base addr to implemente
doorbell mapping feature
Signed-off-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxx>
---
drivers/vdpa/ifcvf/ifcvf_base.c | 1 +
drivers/vdpa/ifcvf/ifcvf_base.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index 1a661ab45af5..cc61a5bfc5b1 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -133,6 +133,7 @@ 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_pa = pci_resource_start(pdev, cap.bar) + cap.offset;
To be more generic and avoid future changes, let's use the math defined
in the virtio spec.
You may refer how it is implemented in virtio_pci vdpa driver[1].
Thanks
[1]
https://lore.kernel.org/virtualization/20210415073147.19331-5-jasowang@xxxxxxxxxx/T/
IFCVF_DBG(pdev, "hw->notify_base = %p\n",
hw->notify_base);
break;
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 0111bfdeb342..bcca7c1669dd 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -98,6 +98,7 @@ struct ifcvf_hw {
char config_msix_name[256];
struct vdpa_callback config_cb;
unsigned int config_irq;
+ phys_addr_t notify_pa;
};
struct ifcvf_adapter {
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