On Tue, Jan 26, 2021 at 4:19 PM Jason Wang <jasowang@xxxxxxxxxx> wrote: > > > On 2021/1/19 下午1:07, Xie Yongji wrote: > > This VDUSE driver enables implementing vDPA devices in userspace. > > Both control path and data path of vDPA devices will be able to > > be handled in userspace. > > > > In the control path, the VDUSE driver will make use of message > > mechnism to forward the config operation from vdpa bus driver > > to userspace. Userspace can use read()/write() to receive/reply > > those control messages. > > > > In the data path, VDUSE_IOTLB_GET_FD ioctl will be used to get > > the file descriptors referring to vDPA device's iova regions. Then > > userspace can use mmap() to access those iova regions. Besides, > > the eventfd mechanism is used to trigger interrupt callbacks and > > receive virtqueue kicks in userspace. > > > > Signed-off-by: Xie Yongji<xieyongji@xxxxxxxxxxxxx> > > --- > > Documentation/driver-api/vduse.rst | 85 ++ > > Documentation/userspace-api/ioctl/ioctl-number.rst | 1 + > > drivers/vdpa/Kconfig | 7 + > > drivers/vdpa/Makefile | 1 + > > drivers/vdpa/vdpa_user/Makefile | 5 + > > drivers/vdpa/vdpa_user/eventfd.c | 221 ++++ > > drivers/vdpa/vdpa_user/eventfd.h | 48 + > > drivers/vdpa/vdpa_user/iova_domain.c | 426 +++++++ > > drivers/vdpa/vdpa_user/iova_domain.h | 68 ++ > > drivers/vdpa/vdpa_user/vduse.h | 62 + > > drivers/vdpa/vdpa_user/vduse_dev.c | 1217 ++++++++++++++++++++ > > include/uapi/linux/vdpa.h | 1 + > > include/uapi/linux/vduse.h | 125 ++ > > 13 files changed, 2267 insertions(+) > > create mode 100644 Documentation/driver-api/vduse.rst > > create mode 100644 drivers/vdpa/vdpa_user/Makefile > > create mode 100644 drivers/vdpa/vdpa_user/eventfd.c > > create mode 100644 drivers/vdpa/vdpa_user/eventfd.h > > create mode 100644 drivers/vdpa/vdpa_user/iova_domain.c > > create mode 100644 drivers/vdpa/vdpa_user/iova_domain.h > > create mode 100644 drivers/vdpa/vdpa_user/vduse.h > > create mode 100644 drivers/vdpa/vdpa_user/vduse_dev.c > > create mode 100644 include/uapi/linux/vduse.h > > > Btw, if you could split this into three parts: > > 1) iova domain > 2) vduse device > 3) doc > > It would be more easier for the reviewers. > Make sense to me. Will do it in v4. Thanks, Yongji
