ib_srp.h 4.2 KB

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  1. /*
  2. * Copyright (c) 2005 Cisco Systems. 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
  8. * OpenIB.org BSD license below:
  9. *
  10. * Redistribution and use in source and binary forms, with or
  11. * without modification, are permitted provided that the following
  12. * conditions are met:
  13. *
  14. * - Redistributions of source code must retain the above
  15. * copyright notice, this list of conditions and the following
  16. * disclaimer.
  17. *
  18. * - Redistributions in binary form must reproduce the above
  19. * copyright notice, this list of conditions and the following
  20. * disclaimer in the documentation and/or other materials
  21. * provided with the distribution.
  22. *
  23. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25. * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27. * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28. * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29. * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30. * SOFTWARE.
  31. *
  32. * $Id: ib_srp.h 3932 2005-11-01 17:19:29Z roland $
  33. */
  34. #ifndef IB_SRP_H
  35. #define IB_SRP_H
  36. #include <linux/types.h>
  37. #include <linux/list.h>
  38. #include <linux/mutex.h>
  39. #include <linux/scatterlist.h>
  40. #include <scsi/scsi_host.h>
  41. #include <scsi/scsi_cmnd.h>
  42. #include <rdma/ib_verbs.h>
  43. #include <rdma/ib_sa.h>
  44. #include <rdma/ib_cm.h>
  45. #include <rdma/ib_fmr_pool.h>
  46. enum {
  47. SRP_PATH_REC_TIMEOUT_MS = 1000,
  48. SRP_ABORT_TIMEOUT_MS = 5000,
  49. SRP_PORT_REDIRECT = 1,
  50. SRP_DLID_REDIRECT = 2,
  51. SRP_MAX_LUN = 512,
  52. SRP_MAX_IU_LEN = 256,
  53. SRP_RQ_SHIFT = 6,
  54. SRP_RQ_SIZE = 1 << SRP_RQ_SHIFT,
  55. SRP_SQ_SIZE = SRP_RQ_SIZE - 1,
  56. SRP_CQ_SIZE = SRP_SQ_SIZE + SRP_RQ_SIZE,
  57. SRP_TAG_TSK_MGMT = 1 << (SRP_RQ_SHIFT + 1),
  58. SRP_FMR_SIZE = 256,
  59. SRP_FMR_POOL_SIZE = 1024,
  60. SRP_FMR_DIRTY_SIZE = SRP_FMR_POOL_SIZE / 4
  61. };
  62. #define SRP_OP_RECV (1 << 31)
  63. #define SRP_MAX_INDIRECT ((SRP_MAX_IU_LEN - \
  64. sizeof (struct srp_cmd) - \
  65. sizeof (struct srp_indirect_buf)) / 16)
  66. enum srp_target_state {
  67. SRP_TARGET_LIVE,
  68. SRP_TARGET_CONNECTING,
  69. SRP_TARGET_DEAD,
  70. SRP_TARGET_REMOVED
  71. };
  72. struct srp_device {
  73. struct list_head dev_list;
  74. struct ib_device *dev;
  75. struct ib_pd *pd;
  76. struct ib_mr *mr;
  77. struct ib_fmr_pool *fmr_pool;
  78. int fmr_page_shift;
  79. int fmr_page_size;
  80. unsigned long fmr_page_mask;
  81. };
  82. struct srp_host {
  83. u8 initiator_port_id[16];
  84. struct srp_device *dev;
  85. u8 port;
  86. struct class_device class_dev;
  87. struct list_head target_list;
  88. spinlock_t target_lock;
  89. struct completion released;
  90. struct list_head list;
  91. };
  92. struct srp_request {
  93. struct list_head list;
  94. struct scsi_cmnd *scmnd;
  95. struct srp_iu *cmd;
  96. struct srp_iu *tsk_mgmt;
  97. struct ib_pool_fmr *fmr;
  98. /*
  99. * Fake scatterlist used when scmnd->use_sg==0. Can be killed
  100. * when the SCSI midlayer no longer generates non-SG commands.
  101. */
  102. struct scatterlist fake_sg;
  103. struct completion done;
  104. short index;
  105. u8 cmd_done;
  106. u8 tsk_status;
  107. };
  108. struct srp_target_port {
  109. __be64 id_ext;
  110. __be64 ioc_guid;
  111. __be64 service_id;
  112. struct srp_host *srp_host;
  113. struct Scsi_Host *scsi_host;
  114. char target_name[32];
  115. unsigned int scsi_id;
  116. struct ib_sa_path_rec path;
  117. struct ib_sa_query *path_query;
  118. int path_query_id;
  119. struct ib_cm_id *cm_id;
  120. struct ib_cq *cq;
  121. struct ib_qp *qp;
  122. int max_ti_iu_len;
  123. s32 req_lim;
  124. unsigned rx_head;
  125. struct srp_iu *rx_ring[SRP_RQ_SIZE];
  126. unsigned tx_head;
  127. unsigned tx_tail;
  128. struct srp_iu *tx_ring[SRP_SQ_SIZE + 1];
  129. struct list_head free_reqs;
  130. struct list_head req_queue;
  131. struct srp_request req_ring[SRP_SQ_SIZE];
  132. struct work_struct work;
  133. struct list_head list;
  134. struct completion done;
  135. int status;
  136. enum srp_target_state state;
  137. };
  138. struct srp_iu {
  139. dma_addr_t dma;
  140. void *buf;
  141. size_t size;
  142. enum dma_data_direction direction;
  143. };
  144. #endif /* IB_SRP_H */