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smc_llc.h

smc_llc.h 1.2 KB
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  1. /*
    2. 

  2.  *  Shared Memory Communications over RDMA (SMC-R) and RoCE
    3. 

  3.  *
    4. 

  4.  *  Definitions for LLC (link layer control) message handling
    5. 

  5.  *
    6. 

  6.  *  Copyright IBM Corp. 2016
    7. 

  7.  *
    8. 

  8.  *  Author(s):  Klaus Wacker <Klaus.Wacker@de.ibm.com>
    9. 

  9.  *              Ursula Braun <ubraun@linux.vnet.ibm.com>
    10. 

  10.  */
    11. 

  11. 

  12. #ifndef SMC_LLC_H
    13. 

  13. #define SMC_LLC_H
    14. 

  14. 

  15. #include "smc_wr.h"
    16. 

  16. 

  17. #define SMC_LLC_FLAG_RESP		0x80
    18. 

  18. 

  19. #define SMC_LLC_WAIT_FIRST_TIME		(5 * HZ)
    20. 

  20. 

  21. enum smc_llc_reqresp {
    22. 

  22. 	SMC_LLC_REQ,
    23. 

  23. 	SMC_LLC_RESP
    24. 

  24. };
    25. 

  25. 

  26. enum smc_llc_msg_type {
    27. 

  27. 	SMC_LLC_CONFIRM_LINK		= 0x01,
    28. 

  28. };
    29. 

  29. 

  30. #define SMC_LLC_DATA_LEN		40
    31. 

  31. 

  32. struct smc_llc_hdr {
    33. 

  33. 	struct smc_wr_rx_hdr common;
    34. 

  34. 	u8 length;	/* 44 */
    35. 

  35. 	u8 reserved;
    36. 

  36. 	u8 flags;
    37. 

  37. };
    38. 

  38. 

  39. struct smc_llc_msg_confirm_link {	/* type 0x01 */
    40. 

  40. 	struct smc_llc_hdr hd;
    41. 

  41. 	u8 sender_mac[ETH_ALEN];
    42. 

  42. 	u8 sender_gid[SMC_GID_SIZE];
    43. 

  43. 	u8 sender_qp_num[3];
    44. 

  44. 	u8 link_num;
    45. 

  45. 	u8 link_uid[SMC_LGR_ID_SIZE];
    46. 

  46. 	u8 max_links;
    47. 

  47. 	u8 reserved[9];
    48. 

  48. };
    49. 

  49. 

  50. union smc_llc_msg {
    51. 

  51. 	struct smc_llc_msg_confirm_link confirm_link;
    52. 

  52. 	struct {
    53. 

  53. 		struct smc_llc_hdr hdr;
    54. 

  54. 		u8 data[SMC_LLC_DATA_LEN];
    55. 

  55. 	} raw;
    56. 

  56. };
    57. 

  57. 

  58. /* transmit */
    59. 

  59. int smc_llc_send_confirm_link(struct smc_link *lnk, u8 mac[], union ib_gid *gid,
    60. 

  60. 			      enum smc_llc_reqresp reqresp);
    61. 

  61. int smc_llc_init(void) __init;
    62. 

  62. 

  63. #endif /* SMC_LLC_H */
    64.