From b3818ea4ad1e2eff8472e8280daba0d2aabfe3c0 Mon Sep 17 00:00:00 2001 From: Michael Margolin Date: Wed, 22 Jul 2026 08:35:58 +0000 Subject: RDMA/core: Add Completion Counters support Add core infrastructure for Completion Counters, a light-weight alternative to polling CQ for tracking operation completions. Define the UVERBS_OBJECT_COMP_CNTR ioctl object with create, destroy, modify and read methods for both success and error counters. Add a QP attach method on the QP object to associate a completion counter with a queue pair. Add ib_comp_cntr struct, ib_comp_cntr_attach_attr, device ops, and DECLARE_RDMA_OBJ_SIZE for driver object allocation. Only userspace Completion Counters are supported at this stage. Reviewed-by: Yonatan Nachum Signed-off-by: Michael Margolin Link: https://patch.msgid.link/20260722083603.30334-2-mrgolin@amazon.com Signed-off-by: Leon Romanovsky --- include/uapi/rdma/ib_user_ioctl_cmds.h | 36 +++++++++++++++++++++++++++++++++ include/uapi/rdma/ib_user_ioctl_verbs.h | 19 +++++++++++++++++ 2 files changed, 55 insertions(+) (limited to 'include/uapi') diff --git a/include/uapi/rdma/ib_user_ioctl_cmds.h b/include/uapi/rdma/ib_user_ioctl_cmds.h index 839835bd4b23..19a94b91987e 100644 --- a/include/uapi/rdma/ib_user_ioctl_cmds.h +++ b/include/uapi/rdma/ib_user_ioctl_cmds.h @@ -57,6 +57,7 @@ enum uverbs_default_objects { UVERBS_OBJECT_ASYNC_EVENT, UVERBS_OBJECT_DMAH, UVERBS_OBJECT_DMABUF, + UVERBS_OBJECT_COMP_CNTR, }; enum { @@ -169,9 +170,16 @@ enum uverbs_attrs_destroy_qp_cmd_attr_ids { UVERBS_ATTR_DESTROY_QP_RESP, }; +enum uverbs_attrs_qp_attach_comp_cntr_cmd_attr_ids { + UVERBS_ATTR_QP_ATTACH_COMP_CNTR_HANDLE, + UVERBS_ATTR_QP_ATTACH_COMP_CNTR_CNTR_HANDLE, + UVERBS_ATTR_QP_ATTACH_COMP_CNTR_OP_MASK, +}; + enum uverbs_methods_qp { UVERBS_METHOD_QP_CREATE, UVERBS_METHOD_QP_DESTROY, + UVERBS_METHOD_QP_ATTACH_COMP_CNTR, }; enum uverbs_attrs_create_srq_cmd_attr_ids { @@ -438,4 +446,32 @@ enum uverbs_attrs_query_gid_entry_cmd_attr_ids { UVERBS_ATTR_QUERY_GID_ENTRY_RESP_ENTRY, }; +enum uverbs_methods_comp_cntr { + UVERBS_METHOD_COMP_CNTR_CREATE, + UVERBS_METHOD_COMP_CNTR_DESTROY, + UVERBS_METHOD_COMP_CNTR_MODIFY, + UVERBS_METHOD_COMP_CNTR_READ, +}; + +enum uverbs_attrs_create_comp_cntr_cmd_attr_ids { + UVERBS_ATTR_CREATE_COMP_CNTR_HANDLE, +}; + +enum uverbs_attrs_destroy_comp_cntr_cmd_attr_ids { + UVERBS_ATTR_DESTROY_COMP_CNTR_HANDLE, +}; + +enum uverbs_attrs_modify_comp_cntr_cmd_attr_ids { + UVERBS_ATTR_MODIFY_COMP_CNTR_HANDLE, + UVERBS_ATTR_MODIFY_COMP_CNTR_ENTRY, + UVERBS_ATTR_MODIFY_COMP_CNTR_OP, + UVERBS_ATTR_MODIFY_COMP_CNTR_VALUE, +}; + +enum uverbs_attrs_read_comp_cntr_cmd_attr_ids { + UVERBS_ATTR_READ_COMP_CNTR_HANDLE, + UVERBS_ATTR_READ_COMP_CNTR_ENTRY, + UVERBS_ATTR_READ_COMP_CNTR_RESP_VALUE, +}; + #endif diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h index 51030c27d479..21f86cc7bb1f 100644 --- a/include/uapi/rdma/ib_user_ioctl_verbs.h +++ b/include/uapi/rdma/ib_user_ioctl_verbs.h @@ -300,4 +300,23 @@ struct ib_uverbs_buffer_desc { __aligned_u64 length; }; +enum ib_uverbs_comp_cntr_entry { + IB_UVERBS_COMP_CNTR_ENTRY_COMP, + IB_UVERBS_COMP_CNTR_ENTRY_ERR, +}; + +enum ib_uverbs_comp_cntr_modify_op { + IB_UVERBS_COMP_CNTR_MODIFY_OP_SET, + IB_UVERBS_COMP_CNTR_MODIFY_OP_INC, +}; + +enum ib_uverbs_qp_attach_comp_cntr_op { + IB_UVERBS_QP_ATTACH_COMP_CNTR_OP_SEND = 1 << 0, + IB_UVERBS_QP_ATTACH_COMP_CNTR_OP_RECV = 1 << 1, + IB_UVERBS_QP_ATTACH_COMP_CNTR_OP_RDMA_READ = 1 << 2, + IB_UVERBS_QP_ATTACH_COMP_CNTR_OP_REMOTE_RDMA_READ = 1 << 3, + IB_UVERBS_QP_ATTACH_COMP_CNTR_OP_RDMA_WRITE = 1 << 4, + IB_UVERBS_QP_ATTACH_COMP_CNTR_OP_REMOTE_RDMA_WRITE = 1 << 5, +}; + #endif -- cgit v1.2.3