| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Ursula Braun | 9bf9abe | 2017-01-09 16:55:21 +0100 | [diff] [blame] | 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 */ |