Hi all: This is an updated version of kernel support for vDPA device. Various changes were made based on the feedback since last verion. One major change is to drop the sysfs API and leave the management interface for future development, and introudce the incremental DMA bus operations. Please see changelog for more information. The work on vhost, IFCVF (intel VF driver for vDPA) and qemu is ongoing. Please provide feedback. Thanks Change from V1: - drop sysfs API, leave the management interface to future development (Michael) - introduce incremental DMA ops (dma_map/dma_unmap) (Michael) - introduce dma_device and use it instead of parent device for doing IOMMU or DMA from bus driver (Michael, Jason, Ling Shan, Tiwei) - accept parent device and dma device when register vdpa device - coding style and compile fixes (Randy) - using vdpa_xxx instead of xxx_vdpa (Jason) - ove vDPA accessors to header and make it static inline (Jason) - split vdp_register_device() into two helpers vdpa_init_device() and vdpa_register_device() which allows intermediate step to be done (Jason) - warn on invalidate queue state when fail to creating virtqueue (Jason) - make to_virtio_vdpa_device() static (Jason) - use kmalloc/kfree instead of devres for virtio vdpa device (Jason) - avoid using cast in vdpa bus function (Jason) - introduce module_vdpa_driver and fix module refcnt (Jason) - fix returning freed address in vdapsim coherent DMA addr allocation (Dan) - various other fixes and tweaks V1: https://lkml.org/lkml/2020/1/16/353 Jason Wang (5): vhost: factor out IOTLB vringh: IOTLB support vDPA: introduce vDPA bus virtio: introduce a vDPA based transport vdpasim: vDPA device simulator MAINTAINERS | 2 + drivers/vhost/Kconfig | 7 + drivers/vhost/Kconfig.vringh | 1 + drivers/vhost/Makefile | 2 + drivers/vhost/net.c | 2 +- drivers/vhost/vhost.c | 221 ++++------- drivers/vhost/vhost.h | 36 +- drivers/vhost/vhost_iotlb.c | 171 +++++++++ drivers/vhost/vringh.c | 421 ++++++++++++++++++-- drivers/virtio/Kconfig | 15 + drivers/virtio/Makefile | 2 + drivers/virtio/vdpa/Kconfig | 26 ++ drivers/virtio/vdpa/Makefile | 3 + drivers/virtio/vdpa/vdpa.c | 160 ++++++++ drivers/virtio/vdpa/vdpa_sim.c | 678 +++++++++++++++++++++++++++++++++ drivers/virtio/virtio_vdpa.c | 392 +++++++++++++++++++ include/linux/vdpa.h | 233 +++++++++++ include/linux/vhost_iotlb.h | 45 +++ include/linux/vringh.h | 36 ++ 19 files changed, 2249 insertions(+), 204 deletions(-) create mode 100644 drivers/vhost/vhost_iotlb.c create mode 100644 drivers/virtio/vdpa/Kconfig create mode 100644 drivers/virtio/vdpa/Makefile create mode 100644 drivers/virtio/vdpa/vdpa.c create mode 100644 drivers/virtio/vdpa/vdpa_sim.c create mode 100644 drivers/virtio/virtio_vdpa.c create mode 100644 include/linux/vdpa.h create mode 100644 include/linux/vhost_iotlb.h -- 2.19.1
