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42 #ifndef _LINUX_SUNRPC_RPC_RDMA_H
43 #define _LINUX_SUNRPC_RPC_RDMA_H
45 #include <linux/types.h>
46 #include <linux/bitops.h>
48 #define RPCRDMA_VERSION 1
49 #define rpcrdma_version cpu_to_be32(RPCRDMA_VERSION)
52 RPCRDMA_V1_DEF_INLINE_SIZE = 1024,
59 rpcrdma_fixed_maxsz = 4,
60 rpcrdma_segment_maxsz = 4,
61 rpcrdma_readchunk_maxsz = 2 + rpcrdma_segment_maxsz,
65 * Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks
67 #define RPCRDMA_HDRLEN_MIN (sizeof(__be32) * 7)
68 #define RPCRDMA_HDRLEN_ERR (sizeof(__be32) * 5)
70 enum rpcrdma_errcode {
76 RDMA_MSG = 0, /* An RPC call or reply msg */
77 RDMA_NOMSG = 1, /* An RPC call or reply msg - separate body */
78 RDMA_MSGP = 2, /* An RPC call or reply msg with padding */
79 RDMA_DONE = 3, /* Client signals reply completion */
80 RDMA_ERROR = 4 /* An RPC RDMA encoding error */
83 #define rdma_msg cpu_to_be32(RDMA_MSG)
84 #define rdma_nomsg cpu_to_be32(RDMA_NOMSG)
85 #define rdma_msgp cpu_to_be32(RDMA_MSGP)
86 #define rdma_done cpu_to_be32(RDMA_DONE)
87 #define rdma_error cpu_to_be32(RDMA_ERROR)
89 #define err_vers cpu_to_be32(ERR_VERS)
90 #define err_chunk cpu_to_be32(ERR_CHUNK)
93 * Private extension to RPC-over-RDMA Version One.
94 * Message passed during RDMA-CM connection set-up.
96 * Add new fields at the end, and don't permute existing
99 struct rpcrdma_connect_private {
107 #define rpcrdma_cmp_magic __cpu_to_be32(0xf6ab0e18)
110 RPCRDMA_CMP_VERSION = 1,
111 RPCRDMA_CMP_F_SND_W_INV_OK = BIT(0),
115 rpcrdma_encode_buffer_size(unsigned int size)
117 return (size >> 10) - 1;
120 static inline unsigned int
121 rpcrdma_decode_buffer_size(u8 val)
123 return ((unsigned int)val + 1) << 10;
126 #endif /* _LINUX_SUNRPC_RPC_RDMA_H */