smi.h 3.3 KB

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  1. /*
  2. * Copyright (c) 2004 Mellanox Technologies Ltd. All rights reserved.
  3. * Copyright (c) 2004 Infinicon Corporation. All rights reserved.
  4. * Copyright (c) 2004 Intel Corporation. All rights reserved.
  5. * Copyright (c) 2004 Topspin Corporation. All rights reserved.
  6. * Copyright (c) 2004-2007 Voltaire Corporation. All rights reserved.
  7. *
  8. * This software is available to you under a choice of one of two
  9. * licenses. You may choose to be licensed under the terms of the GNU
  10. * General Public License (GPL) Version 2, available from the file
  11. * COPYING in the main directory of this source tree, or the
  12. * OpenIB.org BSD license below:
  13. *
  14. * Redistribution and use in source and binary forms, with or
  15. * without modification, are permitted provided that the following
  16. * conditions are met:
  17. *
  18. * - Redistributions of source code must retain the above
  19. * copyright notice, this list of conditions and the following
  20. * disclaimer.
  21. *
  22. * - Redistributions in binary form must reproduce the above
  23. * copyright notice, this list of conditions and the following
  24. * disclaimer in the documentation and/or other materials
  25. * provided with the distribution.
  26. *
  27. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29. * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  31. * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  32. * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  33. * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  34. * SOFTWARE.
  35. *
  36. */
  37. #ifndef __SMI_H_
  38. #define __SMI_H_
  39. #include <rdma/ib_smi.h>
  40. enum smi_action {
  41. IB_SMI_DISCARD,
  42. IB_SMI_HANDLE
  43. };
  44. enum smi_forward_action {
  45. IB_SMI_LOCAL, /* SMP should be completed up the stack */
  46. IB_SMI_SEND, /* received DR SMP should be forwarded to the send queue */
  47. IB_SMI_FORWARD /* SMP should be forwarded (for switches only) */
  48. };
  49. enum smi_action smi_handle_dr_smp_recv(struct ib_smp *smp, bool is_switch,
  50. int port_num, int phys_port_cnt);
  51. int smi_get_fwd_port(struct ib_smp *smp);
  52. extern enum smi_forward_action smi_check_forward_dr_smp(struct ib_smp *smp);
  53. extern enum smi_action smi_handle_dr_smp_send(struct ib_smp *smp,
  54. bool is_switch, int port_num);
  55. /*
  56. * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
  57. * via process_mad
  58. */
  59. static inline enum smi_action smi_check_local_smp(struct ib_smp *smp,
  60. struct ib_device *device)
  61. {
  62. /* C14-9:3 -- We're at the end of the DR segment of path */
  63. /* C14-9:4 -- Hop Pointer = Hop Count + 1 -> give to SMA/SM */
  64. return ((device->ops.process_mad &&
  65. !ib_get_smp_direction(smp) &&
  66. (smp->hop_ptr == smp->hop_cnt + 1)) ?
  67. IB_SMI_HANDLE : IB_SMI_DISCARD);
  68. }
  69. /*
  70. * Return IB_SMI_HANDLE if the SMP should be handled by the local SMA/SM
  71. * via process_mad
  72. */
  73. static inline enum smi_action smi_check_local_returning_smp(struct ib_smp *smp,
  74. struct ib_device *device)
  75. {
  76. /* C14-13:3 -- We're at the end of the DR segment of path */
  77. /* C14-13:4 -- Hop Pointer == 0 -> give to SM */
  78. return ((device->ops.process_mad &&
  79. ib_get_smp_direction(smp) &&
  80. !smp->hop_ptr) ? IB_SMI_HANDLE : IB_SMI_DISCARD);
  81. }
  82. #endif /* __SMI_H_ */