@@ -128,6 +128,7 @@ int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
break;
case VIRTIO_PCI_CAP_DEVICE_CFG:
hw->dev_cfg = get_cap_addr(hw, &cap);
+ hw->cap_dev_config_size = le32_to_cpu(cap.length);
IFCVF_DBG(pdev, "hw->dev_cfg = %p\n", hw->dev_cfg);
break;
}
@@ -233,15 +234,18 @@ 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);
switch (hw->dev_type) {
case VIRTIO_ID_NET:
- config_size = sizeof(struct virtio_net_config);
+ config_size = cap_size >= net_config_size ? net_config_size : cap_size;
break;
case VIRTIO_ID_BLOCK:
- config_size = sizeof(struct virtio_blk_config);
+ config_size = cap_size >= blk_config_size ? blk_config_size : cap_size;
break;
default:
config_size = 0;
@@ -87,6 +87,8 @@ struct ifcvf_hw {
int config_irq;
int vqs_reused_irq;
u16 nr_vring;
+ /* VIRTIO_PCI_CAP_DEVICE_CFG size */
+ u32 cap_dev_config_size;
};
struct ifcvf_adapter {
ifcvf_get_config_size() should return a virtio device type specific value, however the ret_value should not be greater than the onboard size of the device implementation. E.g., for virtio_net, config_size should be the minimum value of sizeof(struct virtio_net_config) and the onboard cap size. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> --- drivers/vdpa/ifcvf/ifcvf_base.c | 8 ++++++-- drivers/vdpa/ifcvf/ifcvf_base.h | 2 ++ 2 files changed, 8 insertions(+), 2 deletions(-)