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#define SMC_LLC_WAIT_TIME		(2 * HZ)
22
23enum smc_llc_reqresp {
24	SMC_LLC_REQ,
25	SMC_LLC_RESP
26};
27
28enum smc_llc_msg_type {
29	SMC_LLC_CONFIRM_LINK		= 0x01,
30	SMC_LLC_ADD_LINK		= 0x02,
31	SMC_LLC_DELETE_LINK		= 0x04,
32	SMC_LLC_CONFIRM_RKEY		= 0x06,
33	SMC_LLC_TEST_LINK		= 0x07,
34	SMC_LLC_CONFIRM_RKEY_CONT	= 0x08,
35	SMC_LLC_DELETE_RKEY		= 0x09,
36};
37
38/* transmit */
39int smc_llc_send_confirm_link(struct smc_link *lnk,
40			      enum smc_llc_reqresp reqresp);
41int smc_llc_send_add_link(struct smc_link *link, u8 mac[], u8 gid[],
42			  enum smc_llc_reqresp reqresp);
43int smc_llc_send_delete_link(struct smc_link *link,
44			     enum smc_llc_reqresp reqresp, bool orderly);
45int smc_llc_link_init(struct smc_link *link);
46void smc_llc_link_active(struct smc_link *link, int testlink_time);
47void smc_llc_link_deleting(struct smc_link *link);
48void smc_llc_link_inactive(struct smc_link *link);
49void smc_llc_link_clear(struct smc_link *link);
50int smc_llc_do_confirm_rkey(struct smc_link *link,
51			    struct smc_buf_desc *rmb_desc);
52int smc_llc_do_delete_rkey(struct smc_link *link,
53			   struct smc_buf_desc *rmb_desc);
54int smc_llc_init(void) __init;
55
56#endif /* SMC_LLC_H */