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Diffstat (limited to 'include/linux/sunrpc/xprtrdma.h')
| -rw-r--r-- | include/linux/sunrpc/xprtrdma.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/include/linux/sunrpc/xprtrdma.h b/include/linux/sunrpc/xprtrdma.h new file mode 100644 index 000000000..16c239e0d --- /dev/null +++ b/include/linux/sunrpc/xprtrdma.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* + * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the BSD-type + * license below: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * + * Neither the name of the Network Appliance, Inc. nor the names of + * its contributors may be used to endorse or promote products + * derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _LINUX_SUNRPC_XPRTRDMA_H +#define _LINUX_SUNRPC_XPRTRDMA_H + +/* + * Constants. Max RPC/NFS header is big enough to account for + * additional marshaling buffers passed down by Linux client. + * + * RDMA header is currently fixed max size, and is big enough for a + * fully-chunked NFS message (read chunks are the largest). Note only + * a single chunk type per message is supported currently. + */ +#define RPCRDMA_MIN_SLOT_TABLE (4U) +#define RPCRDMA_DEF_SLOT_TABLE (128U) +#define RPCRDMA_MAX_SLOT_TABLE (16384U) + +#define RPCRDMA_MIN_INLINE (1024) /* min inline thresh */ +#define RPCRDMA_DEF_INLINE (4096) /* default inline thresh */ +#define RPCRDMA_MAX_INLINE (65536) /* max inline thresh */ + +/* Memory registration strategies, by number. + * This is part of a kernel / user space API. Do not remove. */ +enum rpcrdma_memreg { + RPCRDMA_BOUNCEBUFFERS = 0, + RPCRDMA_REGISTER, + RPCRDMA_MEMWINDOWS, + RPCRDMA_MEMWINDOWS_ASYNC, + RPCRDMA_MTHCAFMR, + RPCRDMA_FRWR, + RPCRDMA_ALLPHYSICAL, + RPCRDMA_LAST +}; + +#endif /* _LINUX_SUNRPC_XPRTRDMA_H */ |