Hello all, This v2 patch set introduces the Elastic RDMA Adapter (ERDMA) driver, which released in Apsara Conference 2021 by Alibaba. The PR of ERDMA userspace provider has already been created [1]. ERDMA enables large-scale RDMA acceleration capability in Alibaba ECS environment, initially offered in g7re instance. It can improve the efficiency of large-scale distributed computing and communication significantly and expand dynamically with the cluster scale of Alibaba Cloud. ERDMA is a RDMA networking adapter based on the Alibaba MOC hardware. It works in the VPC network environment (overlay network), and uses iWarp tranport protocol. ERDMA supports reliable connection (RC). ERDMA also supports both kernel space and user space verbs. Now we have already supported HPC/AI applications with libfabric, NoF and some other internal verbs libraries, such as xrdma, epsl, etc,. For the ECS instance with RDMA enabled, our MOC hardware generates two kinds of PCI devices: one for ERDMA, and one for the original net device (virtio-net). They are separated PCI devices, using "rdma link" command with a filter inside our rdma_link_ops.newlink implementation can bind them together properly. Fixed issues in v2: - No "extern" to function declarations. - No inline functions in .c files, no void casting for functions with return values. - Based on siw's newest kernel version, rewrite the code (mainly CM and CM related part) which originally based on an old siw version. version. - remove debugfs. - fix issues reported by kernel test rebot. - Using RDMA_NLDEV_CMD_NEWLINK instead of binding in net notifiers. [1] https://github.com/linux-rdma/rdma-core/pull/1126 Thanks, Cheng Xu Cheng Xu (11): RDMA: Add ERDMA to rdma_driver_id definition RDMA/erdma: Add the hardware related definitions RDMA/erdma: Add main include file RDMA/erdma: Add cmdq implementation RDMA/erdma: Add event queue implementation RDMA/erdma: Add verbs header file RDMA/erdma: Add verbs implementation RDMA/erdma: Add connection management (CM) support RDMA/erdma: Add the erdma module RDMA/erdma: Add the ABI definitions RDMA/erdma: Add driver to kernel build environment MAINTAINERS | 8 + drivers/infiniband/Kconfig | 1 + drivers/infiniband/hw/Makefile | 1 + drivers/infiniband/hw/erdma/Kconfig | 10 + drivers/infiniband/hw/erdma/Makefile | 4 + drivers/infiniband/hw/erdma/erdma.h | 392 ++++++ drivers/infiniband/hw/erdma/erdma_cm.c | 1382 ++++++++++++++++++++ drivers/infiniband/hw/erdma/erdma_cm.h | 196 +++ drivers/infiniband/hw/erdma/erdma_cmdq.c | 494 ++++++++ drivers/infiniband/hw/erdma/erdma_cq.c | 199 +++ drivers/infiniband/hw/erdma/erdma_eq.c | 341 +++++ drivers/infiniband/hw/erdma/erdma_hw.h | 476 +++++++ drivers/infiniband/hw/erdma/erdma_main.c | 707 +++++++++++ drivers/infiniband/hw/erdma/erdma_qp.c | 547 ++++++++ drivers/infiniband/hw/erdma/erdma_verbs.c | 1409 +++++++++++++++++++++ drivers/infiniband/hw/erdma/erdma_verbs.h | 339 +++++ include/uapi/rdma/erdma-abi.h | 49 + include/uapi/rdma/ib_user_ioctl_verbs.h | 1 + 18 files changed, 6556 insertions(+) create mode 100644 drivers/infiniband/hw/erdma/Kconfig create mode 100644 drivers/infiniband/hw/erdma/Makefile create mode 100644 drivers/infiniband/hw/erdma/erdma.h create mode 100644 drivers/infiniband/hw/erdma/erdma_cm.c create mode 100644 drivers/infiniband/hw/erdma/erdma_cm.h create mode 100644 drivers/infiniband/hw/erdma/erdma_cmdq.c create mode 100644 drivers/infiniband/hw/erdma/erdma_cq.c create mode 100644 drivers/infiniband/hw/erdma/erdma_eq.c create mode 100644 drivers/infiniband/hw/erdma/erdma_hw.h create mode 100644 drivers/infiniband/hw/erdma/erdma_main.c create mode 100644 drivers/infiniband/hw/erdma/erdma_qp.c create mode 100644 drivers/infiniband/hw/erdma/erdma_verbs.c create mode 100644 drivers/infiniband/hw/erdma/erdma_verbs.h create mode 100644 include/uapi/rdma/erdma-abi.h -- 2.27.0
