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This patch implements a software vDPA networking device. The datapath is implemented through vringh and workqueue. The device has an on-chip IOMMU which translates IOVA to PA. For kernel virtio drivers, vDPA simulator driver provides dma_ops. For vhost driers, set_map() methods of vdpa_config_ops is implemented to accept mappings from vhost. Currently, vDPA device simulator will loopback TX traffic to RX. So the main use case for the device is vDPA feature testing, prototyping and development. Note, there's no management API implemented, a vDPA device will be registered once the module is probed. We need to handle this in the future development. Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200326140125.19794-9-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
26 lines
583 B
Text
26 lines
583 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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config VDPA
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tristate
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help
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Enable this module to support vDPA device that uses a
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datapath which complies with virtio specifications with
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vendor specific control path.
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menuconfig VDPA_MENU
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bool "VDPA drivers"
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default n
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if VDPA_MENU
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config VDPA_SIM
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tristate "vDPA device simulator"
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depends on RUNTIME_TESTING_MENU
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select VDPA
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select VHOST_RING
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default n
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help
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vDPA networking device simulator which loop TX traffic back
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to RX. This device is used for testing, prototyping and
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development of vDPA.
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endif # VDPA_MENU
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