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40 #ifndef _LINUX_SUNRPC_XPRTRDMA_H
41 #define _LINUX_SUNRPC_XPRTRDMA_H
44 * RPC transport identifier for RDMA
46 #define XPRT_TRANSPORT_RDMA 256
49 * rpcbind (v3+) RDMA netid.
51 #define RPCBIND_NETID_RDMA "rdma"
54 * Constants. Max RPC/NFS header is big enough to account for
55 * additional marshaling buffers passed down by Linux client.
57 * RDMA header is currently fixed max size, and is big enough for a
58 * fully-chunked NFS message (read chunks are the largest). Note only
59 * a single chunk type per message is supported currently.
61 #define RPCRDMA_MIN_SLOT_TABLE (2U)
62 #define RPCRDMA_DEF_SLOT_TABLE (32U)
63 #define RPCRDMA_MAX_SLOT_TABLE (256U)
65 #define RPCRDMA_DEF_INLINE (1024) /* default inline max */
67 #define RPCRDMA_INLINE_PAD_THRESH (512)/* payload threshold to pad (bytes) */
69 #define RDMA_RESOLVE_TIMEOUT (5*HZ) /* TBD 5 seconds */
70 #define RDMA_CONNECT_RETRY_MAX (2) /* retries if no listener backlog */
72 /* memory registration strategies */
73 #define RPCRDMA_PERSISTENT_REGISTRATION (1)
76 RPCRDMA_BOUNCEBUFFERS = 0,
79 RPCRDMA_MEMWINDOWS_ASYNC,
85 #endif /* _LINUX_SUNRPC_XPRTRDMA_H */