1 /* SPDX-License-Identifier: GPL-2.0 */
3  *  Shared Memory Communications over RDMA (SMC-R) and RoCE
5  *  Definitions for the SMC module (socket related)
22 #define SMC_V1		1		/* SMC version V1 */
23 #define SMC_V2		2		/* SMC version V2 */
26 #define SMCPROTO_SMC		0	/* SMC protocol, IPv4 */
27 #define SMCPROTO_SMC6		1	/* SMC protocol, IPv6 */
29 #define SMC_MAX_ISM_DEVS	8	/* max # of proposed non-native ISM
41 enum smc_state {		/* possible states of an SMC socket */
110 union smc_host_cursor {	/* SMC cursor - an offset in an RMBE */
153 	struct smc_link		*lnk;		/* assigned SMC-R link */
154 	u32			alert_token_local; /* unique conn. id */
176 						/* prod crsr - confirmed by peer
178 	union smc_host_cursor	tx_curs_prep;	/* tx - prepared data
181 	union smc_host_cursor	tx_curs_sent;	/* tx - sent data
184 	union smc_host_cursor	tx_curs_fin;	/* tx - confirmed by peer
185 						 * snd-wnd-begin ?
189 	u16			tx_cdc_seq_fin;	/* sequence # - tx completed */
192 						 * - inc when post wqe,
193 						 * - dec on polled tx cqe
231 	struct tasklet_struct	rx_tsklet;	/* Receiver tasklet for SMC-D */
233 						 * 0 for SMC-R, 32 for SMC-D
235 	u64			peer_token;	/* SMC-D token of peer */
241 struct smc_sock {				/* smc sock container */
252 	struct smc_connection	conn;		/* smc connection */
254 	struct work_struct	connect_work;	/* handle non-blocking connect*/
263 	atomic_t                queued_smc_hs;  /* queued smc handshakes */
277 						/* non-blocking connect in
291 static inline void smc_init_saved_callbacks(struct smc_sock *smc)  in smc_init_saved_callbacks()  argument
293 	smc->clcsk_state_change	= NULL;  in smc_init_saved_callbacks()
294 	smc->clcsk_data_ready	= NULL;  in smc_init_saved_callbacks()
295 	smc->clcsk_write_space	= NULL;  in smc_init_saved_callbacks()
296 	smc->clcsk_error_report	= NULL;  in smc_init_saved_callbacks()
302 	       ((uintptr_t)clcsk->sk_user_data & ~SK_USER_DATA_NOCOPY);  in smc_clcsock_user_data()
355 static inline bool using_ipsec(struct smc_sock *smc)  in using_ipsec()  argument
357 	return (smc->clcsock->sk->sk_policy[0] ||  in using_ipsec()
358 		smc->clcsock->sk->sk_policy[1]) ? true : false;  in using_ipsec()
361 static inline bool using_ipsec(struct smc_sock *smc)  in using_ipsec()  argument
375 /* smc handshake limitation interface for netlink  */