xprtrdma.h 2.9 KB

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  1. /*
  2. * Copyright (c) 2003-2007 Network Appliance, Inc. All rights reserved.
  3. *
  4. * This software is available to you under a choice of one of two
  5. * licenses. You may choose to be licensed under the terms of the GNU
  6. * General Public License (GPL) Version 2, available from the file
  7. * COPYING in the main directory of this source tree, or the BSD-type
  8. * license below:
  9. *
  10. * Redistribution and use in source and binary forms, with or without
  11. * modification, are permitted provided that the following conditions
  12. * are met:
  13. *
  14. * Redistributions of source code must retain the above copyright
  15. * notice, this list of conditions and the following disclaimer.
  16. *
  17. * Redistributions in binary form must reproduce the above
  18. * copyright notice, this list of conditions and the following
  19. * disclaimer in the documentation and/or other materials provided
  20. * with the distribution.
  21. *
  22. * Neither the name of the Network Appliance, Inc. nor the names of
  23. * its contributors may be used to endorse or promote products
  24. * derived from this software without specific prior written
  25. * permission.
  26. *
  27. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  30. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  32. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  33. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  34. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  35. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  36. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  37. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  38. */
  39. #ifndef _LINUX_SUNRPC_XPRTRDMA_H
  40. #define _LINUX_SUNRPC_XPRTRDMA_H
  41. /*
  42. * Constants. Max RPC/NFS header is big enough to account for
  43. * additional marshaling buffers passed down by Linux client.
  44. *
  45. * RDMA header is currently fixed max size, and is big enough for a
  46. * fully-chunked NFS message (read chunks are the largest). Note only
  47. * a single chunk type per message is supported currently.
  48. */
  49. #define RPCRDMA_MIN_SLOT_TABLE (2U)
  50. #define RPCRDMA_DEF_SLOT_TABLE (128U)
  51. #define RPCRDMA_MAX_SLOT_TABLE (256U)
  52. #define RPCRDMA_DEF_INLINE (1024) /* default inline max */
  53. #define RPCRDMA_INLINE_PAD_THRESH (512)/* payload threshold to pad (bytes) */
  54. /* Memory registration strategies, by number.
  55. * This is part of a kernel / user space API. Do not remove. */
  56. enum rpcrdma_memreg {
  57. RPCRDMA_BOUNCEBUFFERS = 0,
  58. RPCRDMA_REGISTER,
  59. RPCRDMA_MEMWINDOWS,
  60. RPCRDMA_MEMWINDOWS_ASYNC,
  61. RPCRDMA_MTHCAFMR,
  62. RPCRDMA_FRMR,
  63. RPCRDMA_ALLPHYSICAL,
  64. RPCRDMA_LAST
  65. };
  66. #endif /* _LINUX_SUNRPC_XPRTRDMA_H */