1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Shared Memory Communications over RDMA (SMC-R) and RoCE 4 * 5 * Definitions for LLC (link layer control) message handling 6 * 7 * Copyright IBM Corp. 2016 8 * 9 * Author(s): Klaus Wacker <Klaus.Wacker@de.ibm.com> 10 * Ursula Braun <ubraun@linux.vnet.ibm.com> 11 */ 12 13 #ifndef SMC_LLC_H 14 #define SMC_LLC_H 15 16 #include "smc_wr.h" 17 18 #define SMC_LLC_FLAG_RESP 0x80 19 20 #define SMC_LLC_WAIT_FIRST_TIME (5 * HZ) 21 22 enum smc_llc_reqresp { 23 SMC_LLC_REQ, 24 SMC_LLC_RESP 25 }; 26 27 enum smc_llc_msg_type { 28 SMC_LLC_CONFIRM_LINK = 0x01, 29 }; 30 31 #define SMC_LLC_DATA_LEN 40 32 33 struct smc_llc_hdr { 34 struct smc_wr_rx_hdr common; 35 u8 length; /* 44 */ 36 u8 reserved; 37 u8 flags; 38 }; 39 40 struct smc_llc_msg_confirm_link { /* type 0x01 */ 41 struct smc_llc_hdr hd; 42 u8 sender_mac[ETH_ALEN]; 43 u8 sender_gid[SMC_GID_SIZE]; 44 u8 sender_qp_num[3]; 45 u8 link_num; 46 u8 link_uid[SMC_LGR_ID_SIZE]; 47 u8 max_links; 48 u8 reserved[9]; 49 }; 50 51 union smc_llc_msg { 52 struct smc_llc_msg_confirm_link confirm_link; 53 struct { 54 struct smc_llc_hdr hdr; 55 u8 data[SMC_LLC_DATA_LEN]; 56 } raw; 57 }; 58 59 /* transmit */ 60 int smc_llc_send_confirm_link(struct smc_link *lnk, u8 mac[], union ib_gid *gid, 61 enum smc_llc_reqresp reqresp); 62 int smc_llc_init(void) __init; 63 64 #endif /* SMC_LLC_H */ 65