ib_uverbs: Support for kernel implementation of XRC calls from user space

Extends the kernel/user space interface for work requests to also provide
the XRC shared receive queue number. Necessary to support
kernel level implementation of user verbs for XRC.

Requires a corresponding libibverbs change to support XRC.

Orabug: 20930262

Signed-off-by: Knut Omang <[email protected]>
Signed-off-by: Mukesh Kacker <[email protected]>

Author: Knut Omang

drivers/infiniband/core/uverbs_cmd.c

@@ -2246,6 +2246,8 @@ ssize_t ib_uverbs_post_send(struct ib_uverbs_file *file,
 				next->ex.imm_data =
 					(__be32 __force) user_wr->ex.imm_data;
 		} else {
+			if (qp->qp_type == IB_QPT_XRC_INI)
+				next->xrc_remote_srq_num = user_wr->xrc_remote_srq_num;
 			switch (next->opcode) {
 			case IB_WR_RDMA_WRITE_WITH_IMM:
 				next->ex.imm_data =

include/uapi/rdma/ib_user_verbs.h

@@ -664,6 +664,8 @@ struct ib_uverbs_send_wr {
 			__u32 reserved;
 		} ud;
 	} wr;
+	__u32 xrc_remote_srq_num;
+	__u32 reserved;
 };
 
 struct ib_uverbs_post_send {