1 /* 2 * Shared Memory Communications over RDMA (SMC-R) and RoCE 3 * 4 * Definitions for LLC (link layer control) message handling 5 * 6 * Copyright IBM Corp. 2016 7 * 8 * Author(s): Klaus Wacker <Klaus.Wacker@de.ibm.com> 9 * Ursula Braun <ubraun@linux.vnet.ibm.com> 10 */ 11 12 #ifndef SMC_LLC_H 13 #define SMC_LLC_H 14 15 #include "smc_wr.h" 16 17 #define SMC_LLC_FLAG_RESP 0x80 18 19 #define SMC_LLC_WAIT_FIRST_TIME (5 * HZ) 20 21 enum smc_llc_reqresp { 22 SMC_LLC_REQ, 23 SMC_LLC_RESP 24 }; 25 26 enum smc_llc_msg_type { 27 SMC_LLC_CONFIRM_LINK = 0x01, 28 }; 29 30 #define SMC_LLC_DATA_LEN 40 31 32 struct smc_llc_hdr { 33 struct smc_wr_rx_hdr common; 34 u8 length; /* 44 */ 35 u8 reserved; 36 u8 flags; 37 }; 38 39 struct smc_llc_msg_confirm_link { /* type 0x01 */ 40 struct smc_llc_hdr hd; 41 u8 sender_mac[ETH_ALEN]; 42 u8 sender_gid[SMC_GID_SIZE]; 43 u8 sender_qp_num[3]; 44 u8 link_num; 45 u8 link_uid[SMC_LGR_ID_SIZE]; 46 u8 max_links; 47 u8 reserved[9]; 48 }; 49 50 union smc_llc_msg { 51 struct smc_llc_msg_confirm_link confirm_link; 52 struct { 53 struct smc_llc_hdr hdr; 54 u8 data[SMC_LLC_DATA_LEN]; 55 } raw; 56 }; 57 58 /* transmit */ 59 int smc_llc_send_confirm_link(struct smc_link *lnk, u8 mac[], union ib_gid *gid, 60 enum smc_llc_reqresp reqresp); 61 int smc_llc_init(void) __init; 62 63 #endif /* SMC_LLC_H */ 64