1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Shared Memory Communications over RDMA (SMC-R) and RoCE
4  *
5  *  Definitions for SMC Connections, Link Groups and Links
6  *
7  *  Copyright IBM Corp. 2016
8  *
9  *  Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
10  */
11 
12 #ifndef _SMC_CORE_H
13 #define _SMC_CORE_H
14 
15 #include <linux/atomic.h>
16 #include <linux/smc.h>
17 #include <linux/pci.h>
18 #include <rdma/ib_verbs.h>
19 #include <net/genetlink.h>
20 
21 #include "smc.h"
22 #include "smc_ib.h"
23 
24 #define SMC_RMBS_PER_LGR_MAX	255	/* max. # of RMBs per link group */
25 
26 struct smc_lgr_list {			/* list of link group definition */
27 	struct list_head	list;
28 	spinlock_t		lock;	/* protects list of link groups */
29 	u32			num;	/* unique link group number */
30 };
31 
32 enum smc_lgr_role {		/* possible roles of a link group */
33 	SMC_CLNT,	/* client */
34 	SMC_SERV	/* server */
35 };
36 
37 enum smc_link_state {			/* possible states of a link */
38 	SMC_LNK_UNUSED,		/* link is unused */
39 	SMC_LNK_INACTIVE,	/* link is inactive */
40 	SMC_LNK_ACTIVATING,	/* link is being activated */
41 	SMC_LNK_ACTIVE,		/* link is active */
42 };
43 
44 #define SMC_WR_BUF_SIZE		48	/* size of work request buffer */
45 #define SMC_WR_BUF_V2_SIZE	8192	/* size of v2 work request buffer */
46 
47 struct smc_wr_buf {
48 	u8	raw[SMC_WR_BUF_SIZE];
49 };
50 
51 struct smc_wr_v2_buf {
52 	u8	raw[SMC_WR_BUF_V2_SIZE];
53 };
54 
55 #define SMC_WR_REG_MR_WAIT_TIME	(5 * HZ)/* wait time for ib_wr_reg_mr result */
56 
57 enum smc_wr_reg_state {
58 	POSTED,		/* ib_wr_reg_mr request posted */
59 	CONFIRMED,	/* ib_wr_reg_mr response: successful */
60 	FAILED		/* ib_wr_reg_mr response: failure */
61 };
62 
63 struct smc_rdma_sge {				/* sges for RDMA writes */
64 	struct ib_sge		wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE];
65 };
66 
67 #define SMC_MAX_RDMA_WRITES	2		/* max. # of RDMA writes per
68 						 * message send
69 						 */
70 
71 struct smc_rdma_sges {				/* sges per message send */
72 	struct smc_rdma_sge	tx_rdma_sge[SMC_MAX_RDMA_WRITES];
73 };
74 
75 struct smc_rdma_wr {				/* work requests per message
76 						 * send
77 						 */
78 	struct ib_rdma_wr	wr_tx_rdma[SMC_MAX_RDMA_WRITES];
79 };
80 
81 #define SMC_LGR_ID_SIZE		4
82 
83 struct smc_link {
84 	struct smc_ib_device	*smcibdev;	/* ib-device */
85 	u8			ibport;		/* port - values 1 | 2 */
86 	struct ib_pd		*roce_pd;	/* IB protection domain,
87 						 * unique for every RoCE QP
88 						 */
89 	struct ib_qp		*roce_qp;	/* IB queue pair */
90 	struct ib_qp_attr	qp_attr;	/* IB queue pair attributes */
91 
92 	struct smc_wr_buf	*wr_tx_bufs;	/* WR send payload buffers */
93 	struct ib_send_wr	*wr_tx_ibs;	/* WR send meta data */
94 	struct ib_sge		*wr_tx_sges;	/* WR send gather meta data */
95 	struct smc_rdma_sges	*wr_tx_rdma_sges;/*RDMA WRITE gather meta data*/
96 	struct smc_rdma_wr	*wr_tx_rdmas;	/* WR RDMA WRITE */
97 	struct smc_wr_tx_pend	*wr_tx_pends;	/* WR send waiting for CQE */
98 	struct completion	*wr_tx_compl;	/* WR send CQE completion */
99 	/* above four vectors have wr_tx_cnt elements and use the same index */
100 	struct ib_send_wr	*wr_tx_v2_ib;	/* WR send v2 meta data */
101 	struct ib_sge		*wr_tx_v2_sge;	/* WR send v2 gather meta data*/
102 	struct smc_wr_tx_pend	*wr_tx_v2_pend;	/* WR send v2 waiting for CQE */
103 	dma_addr_t		wr_tx_dma_addr;	/* DMA address of wr_tx_bufs */
104 	dma_addr_t		wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/
105 	atomic_long_t		wr_tx_id;	/* seq # of last sent WR */
106 	unsigned long		*wr_tx_mask;	/* bit mask of used indexes */
107 	u32			wr_tx_cnt;	/* number of WR send buffers */
108 	wait_queue_head_t	wr_tx_wait;	/* wait for free WR send buf */
109 	atomic_t		wr_tx_refcnt;	/* tx refs to link */
110 
111 	struct smc_wr_buf	*wr_rx_bufs;	/* WR recv payload buffers */
112 	struct ib_recv_wr	*wr_rx_ibs;	/* WR recv meta data */
113 	struct ib_sge		*wr_rx_sges;	/* WR recv scatter meta data */
114 	/* above three vectors have wr_rx_cnt elements and use the same index */
115 	dma_addr_t		wr_rx_dma_addr;	/* DMA address of wr_rx_bufs */
116 	dma_addr_t		wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/
117 	u64			wr_rx_id;	/* seq # of last recv WR */
118 	u64			wr_rx_id_compl; /* seq # of last completed WR */
119 	u32			wr_rx_cnt;	/* number of WR recv buffers */
120 	unsigned long		wr_rx_tstamp;	/* jiffies when last buf rx */
121 	wait_queue_head_t       wr_rx_empty_wait; /* wait for RQ empty */
122 
123 	struct ib_reg_wr	wr_reg;		/* WR register memory region */
124 	wait_queue_head_t	wr_reg_wait;	/* wait for wr_reg result */
125 	atomic_t		wr_reg_refcnt;	/* reg refs to link */
126 	enum smc_wr_reg_state	wr_reg_state;	/* state of wr_reg request */
127 
128 	u8			gid[SMC_GID_SIZE];/* gid matching used vlan id*/
129 	u8			sgid_index;	/* gid index for vlan id      */
130 	u32			peer_qpn;	/* QP number of peer */
131 	enum ib_mtu		path_mtu;	/* used mtu */
132 	enum ib_mtu		peer_mtu;	/* mtu size of peer */
133 	u32			psn_initial;	/* QP tx initial packet seqno */
134 	u32			peer_psn;	/* QP rx initial packet seqno */
135 	u8			peer_mac[ETH_ALEN];	/* = gid[8:10||13:15] */
136 	u8			peer_gid[SMC_GID_SIZE];	/* gid of peer*/
137 	u8			link_id;	/* unique # within link group */
138 	u8			link_uid[SMC_LGR_ID_SIZE]; /* unique lnk id */
139 	u8			peer_link_uid[SMC_LGR_ID_SIZE]; /* peer uid */
140 	u8			link_idx;	/* index in lgr link array */
141 	u8			link_is_asym;	/* is link asymmetric? */
142 	u8			clearing : 1;	/* link is being cleared */
143 	refcount_t		refcnt;		/* link reference count */
144 	struct smc_link_group	*lgr;		/* parent link group */
145 	struct work_struct	link_down_wrk;	/* wrk to bring link down */
146 	char			ibname[IB_DEVICE_NAME_MAX]; /* ib device name */
147 	int			ndev_ifidx; /* network device ifindex */
148 
149 	enum smc_link_state	state;		/* state of link */
150 	struct delayed_work	llc_testlink_wrk; /* testlink worker */
151 	struct completion	llc_testlink_resp; /* wait for rx of testlink */
152 	int			llc_testlink_time; /* testlink interval */
153 	atomic_t		conn_cnt; /* connections on this link */
154 };
155 
156 /* For now we just allow one parallel link per link group. The SMC protocol
157  * allows more (up to 8).
158  */
159 #define SMC_LINKS_PER_LGR_MAX	3
160 #define SMC_SINGLE_LINK		0
161 
162 /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */
163 struct smc_buf_desc {
164 	struct list_head	list;
165 	void			*cpu_addr;	/* virtual address of buffer */
166 	struct page		*pages;
167 	int			len;		/* length of buffer */
168 	u32			used;		/* currently used / unused */
169 	union {
170 		struct { /* SMC-R */
171 			struct sg_table	sgt[SMC_LINKS_PER_LGR_MAX];
172 					/* virtual buffer */
173 			struct ib_mr	*mr[SMC_LINKS_PER_LGR_MAX];
174 					/* memory region: for rmb and
175 					 * vzalloced sndbuf
176 					 * incl. rkey provided to peer
177 					 * and lkey provided to local
178 					 */
179 			u32		order;	/* allocation order */
180 
181 			u8		is_conf_rkey;
182 					/* confirm_rkey done */
183 			u8		is_reg_mr[SMC_LINKS_PER_LGR_MAX];
184 					/* mem region registered */
185 			u8		is_map_ib[SMC_LINKS_PER_LGR_MAX];
186 					/* mem region mapped to lnk */
187 			u8		is_dma_need_sync;
188 			u8		is_reg_err;
189 					/* buffer registration err */
190 			u8		is_vm;
191 					/* virtually contiguous */
192 		};
193 		struct { /* SMC-D */
194 			unsigned short	sba_idx;
195 					/* SBA index number */
196 			u64		token;
197 					/* DMB token number */
198 			dma_addr_t	dma_addr;
199 					/* DMA address */
200 		};
201 	};
202 };
203 
204 struct smc_rtoken {				/* address/key of remote RMB */
205 	u64			dma_addr;
206 	u32			rkey;
207 };
208 
209 #define SMC_BUF_MIN_SIZE	16384	/* minimum size of an RMB */
210 #define SMC_RMBE_SIZES		16	/* number of distinct RMBE sizes */
211 /* theoretically, the RFC states that largest size would be 512K,
212  * i.e. compressed 5 and thus 6 sizes (0..5), despite
213  * struct smc_clc_msg_accept_confirm.rmbe_size being a 4 bit value (0..15)
214  */
215 
216 struct smcd_dev;
217 
218 enum smc_lgr_type {				/* redundancy state of lgr */
219 	SMC_LGR_NONE,			/* no active links, lgr to be deleted */
220 	SMC_LGR_SINGLE,			/* 1 active RNIC on each peer */
221 	SMC_LGR_SYMMETRIC,		/* 2 active RNICs on each peer */
222 	SMC_LGR_ASYMMETRIC_PEER,	/* local has 2, peer 1 active RNICs */
223 	SMC_LGR_ASYMMETRIC_LOCAL,	/* local has 1, peer 2 active RNICs */
224 };
225 
226 enum smcr_buf_type {		/* types of SMC-R sndbufs and RMBs */
227 	SMCR_PHYS_CONT_BUFS	= 0,
228 	SMCR_VIRT_CONT_BUFS	= 1,
229 	SMCR_MIXED_BUFS		= 2,
230 };
231 
232 enum smc_llc_flowtype {
233 	SMC_LLC_FLOW_NONE	= 0,
234 	SMC_LLC_FLOW_ADD_LINK	= 2,
235 	SMC_LLC_FLOW_DEL_LINK	= 4,
236 	SMC_LLC_FLOW_REQ_ADD_LINK = 5,
237 	SMC_LLC_FLOW_RKEY	= 6,
238 };
239 
240 struct smc_llc_qentry;
241 
242 struct smc_llc_flow {
243 	enum smc_llc_flowtype type;
244 	struct smc_llc_qentry *qentry;
245 };
246 
247 struct smc_link_group {
248 	struct list_head	list;
249 	struct rb_root		conns_all;	/* connection tree */
250 	rwlock_t		conns_lock;	/* protects conns_all */
251 	unsigned int		conns_num;	/* current # of connections */
252 	unsigned short		vlan_id;	/* vlan id of link group */
253 
254 	struct list_head	sndbufs[SMC_RMBE_SIZES];/* tx buffers */
255 	struct mutex		sndbufs_lock;	/* protects tx buffers */
256 	struct list_head	rmbs[SMC_RMBE_SIZES];	/* rx buffers */
257 	struct mutex		rmbs_lock;	/* protects rx buffers */
258 
259 	u8			id[SMC_LGR_ID_SIZE];	/* unique lgr id */
260 	struct delayed_work	free_work;	/* delayed freeing of an lgr */
261 	struct work_struct	terminate_work;	/* abnormal lgr termination */
262 	struct workqueue_struct	*tx_wq;		/* wq for conn. tx workers */
263 	u8			sync_err : 1;	/* lgr no longer fits to peer */
264 	u8			terminating : 1;/* lgr is terminating */
265 	u8			freeing : 1;	/* lgr is being freed */
266 
267 	refcount_t		refcnt;		/* lgr reference count */
268 	bool			is_smcd;	/* SMC-R or SMC-D */
269 	u8			smc_version;
270 	u8			negotiated_eid[SMC_MAX_EID_LEN];
271 	u8			peer_os;	/* peer operating system */
272 	u8			peer_smc_release;
273 	u8			peer_hostname[SMC_MAX_HOSTNAME_LEN];
274 	union {
275 		struct { /* SMC-R */
276 			enum smc_lgr_role	role;
277 						/* client or server */
278 			struct smc_link		lnk[SMC_LINKS_PER_LGR_MAX];
279 						/* smc link */
280 			struct smc_wr_v2_buf	*wr_rx_buf_v2;
281 						/* WR v2 recv payload buffer */
282 			struct smc_wr_v2_buf	*wr_tx_buf_v2;
283 						/* WR v2 send payload buffer */
284 			char			peer_systemid[SMC_SYSTEMID_LEN];
285 						/* unique system_id of peer */
286 			struct smc_rtoken	rtokens[SMC_RMBS_PER_LGR_MAX]
287 						[SMC_LINKS_PER_LGR_MAX];
288 						/* remote addr/key pairs */
289 			DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX);
290 						/* used rtoken elements */
291 			u8			next_link_id;
292 			enum smc_lgr_type	type;
293 			enum smcr_buf_type	buf_type;
294 						/* redundancy state */
295 			u8			pnet_id[SMC_MAX_PNETID_LEN + 1];
296 						/* pnet id of this lgr */
297 			struct list_head	llc_event_q;
298 						/* queue for llc events */
299 			spinlock_t		llc_event_q_lock;
300 						/* protects llc_event_q */
301 			struct mutex		llc_conf_mutex;
302 						/* protects lgr reconfig. */
303 			struct work_struct	llc_add_link_work;
304 			struct work_struct	llc_del_link_work;
305 			struct work_struct	llc_event_work;
306 						/* llc event worker */
307 			wait_queue_head_t	llc_flow_waiter;
308 						/* w4 next llc event */
309 			wait_queue_head_t	llc_msg_waiter;
310 						/* w4 next llc msg */
311 			struct smc_llc_flow	llc_flow_lcl;
312 						/* llc local control field */
313 			struct smc_llc_flow	llc_flow_rmt;
314 						/* llc remote control field */
315 			struct smc_llc_qentry	*delayed_event;
316 						/* arrived when flow active */
317 			spinlock_t		llc_flow_lock;
318 						/* protects llc flow */
319 			int			llc_testlink_time;
320 						/* link keep alive time */
321 			u32			llc_termination_rsn;
322 						/* rsn code for termination */
323 			u8			nexthop_mac[ETH_ALEN];
324 			u8			uses_gateway;
325 			__be32			saddr;
326 						/* net namespace */
327 			struct net		*net;
328 		};
329 		struct { /* SMC-D */
330 			u64			peer_gid;
331 						/* Peer GID (remote) */
332 			struct smcd_dev		*smcd;
333 						/* ISM device for VLAN reg. */
334 			u8			peer_shutdown : 1;
335 						/* peer triggered shutdownn */
336 		};
337 	};
338 };
339 
340 struct smc_clc_msg_local;
341 
342 #define GID_LIST_SIZE	2
343 
344 struct smc_gidlist {
345 	u8			len;
346 	u8			list[GID_LIST_SIZE][SMC_GID_SIZE];
347 };
348 
349 struct smc_init_info_smcrv2 {
350 	/* Input fields */
351 	__be32			saddr;
352 	struct sock		*clc_sk;
353 	__be32			daddr;
354 
355 	/* Output fields when saddr is set */
356 	struct smc_ib_device	*ib_dev_v2;
357 	u8			ib_port_v2;
358 	u8			ib_gid_v2[SMC_GID_SIZE];
359 
360 	/* Additional output fields when clc_sk and daddr is set as well */
361 	u8			uses_gateway;
362 	u8			nexthop_mac[ETH_ALEN];
363 
364 	struct smc_gidlist	gidlist;
365 };
366 
367 struct smc_init_info {
368 	u8			is_smcd;
369 	u8			smc_type_v1;
370 	u8			smc_type_v2;
371 	u8			first_contact_peer;
372 	u8			first_contact_local;
373 	unsigned short		vlan_id;
374 	u32			rc;
375 	u8			negotiated_eid[SMC_MAX_EID_LEN];
376 	/* SMC-R */
377 	u8			smcr_version;
378 	u8			check_smcrv2;
379 	u8			peer_gid[SMC_GID_SIZE];
380 	u8			peer_mac[ETH_ALEN];
381 	u8			peer_systemid[SMC_SYSTEMID_LEN];
382 	struct smc_ib_device	*ib_dev;
383 	u8			ib_gid[SMC_GID_SIZE];
384 	u8			ib_port;
385 	u32			ib_clcqpn;
386 	struct smc_init_info_smcrv2 smcrv2;
387 	/* SMC-D */
388 	u64			ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
389 	struct smcd_dev		*ism_dev[SMC_MAX_ISM_DEVS + 1];
390 	u16			ism_chid[SMC_MAX_ISM_DEVS + 1];
391 	u8			ism_offered_cnt; /* # of ISM devices offered */
392 	u8			ism_selected;    /* index of selected ISM dev*/
393 	u8			smcd_version;
394 };
395 
396 /* Find the connection associated with the given alert token in the link group.
397  * To use rbtrees we have to implement our own search core.
398  * Requires @conns_lock
399  * @token	alert token to search for
400  * @lgr		 link group to search in
401  * Returns connection associated with token if found, NULL otherwise.
402  */
smc_lgr_find_conn(u32 token,struct smc_link_group * lgr)403 static inline struct smc_connection *smc_lgr_find_conn(
404 	u32 token, struct smc_link_group *lgr)
405 {
406 	struct smc_connection *res = NULL;
407 	struct rb_node *node;
408 
409 	node = lgr->conns_all.rb_node;
410 	while (node) {
411 		struct smc_connection *cur = rb_entry(node,
412 					struct smc_connection, alert_node);
413 
414 		if (cur->alert_token_local > token) {
415 			node = node->rb_left;
416 		} else {
417 			if (cur->alert_token_local < token) {
418 				node = node->rb_right;
419 			} else {
420 				res = cur;
421 				break;
422 			}
423 		}
424 	}
425 
426 	return res;
427 }
428 
smc_conn_lgr_valid(struct smc_connection * conn)429 static inline bool smc_conn_lgr_valid(struct smc_connection *conn)
430 {
431 	return conn->lgr && conn->alert_token_local;
432 }
433 
434 /*
435  * Returns true if the specified link is usable.
436  *
437  * usable means the link is ready to receive RDMA messages, map memory
438  * on the link, etc. This doesn't ensure we are able to send RDMA messages
439  * on this link, if sending RDMA messages is needed, use smc_link_sendable()
440  */
smc_link_usable(struct smc_link * lnk)441 static inline bool smc_link_usable(struct smc_link *lnk)
442 {
443 	if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE)
444 		return false;
445 	return true;
446 }
447 
448 /*
449  * Returns true if the specified link is ready to receive AND send RDMA
450  * messages.
451  *
452  * For the client side in first contact, the underlying QP may still in
453  * RESET or RTR when the link state is ACTIVATING, checks in smc_link_usable()
454  * is not strong enough. For those places that need to send any CDC or LLC
455  * messages, use smc_link_sendable(), otherwise, use smc_link_usable() instead
456  */
smc_link_sendable(struct smc_link * lnk)457 static inline bool smc_link_sendable(struct smc_link *lnk)
458 {
459 	return smc_link_usable(lnk) &&
460 		lnk->qp_attr.cur_qp_state == IB_QPS_RTS;
461 }
462 
smc_link_active(struct smc_link * lnk)463 static inline bool smc_link_active(struct smc_link *lnk)
464 {
465 	return lnk->state == SMC_LNK_ACTIVE;
466 }
467 
smc_gid_be16_convert(__u8 * buf,u8 * gid_raw)468 static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
469 {
470 	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
471 		be16_to_cpu(((__be16 *)gid_raw)[0]),
472 		be16_to_cpu(((__be16 *)gid_raw)[1]),
473 		be16_to_cpu(((__be16 *)gid_raw)[2]),
474 		be16_to_cpu(((__be16 *)gid_raw)[3]),
475 		be16_to_cpu(((__be16 *)gid_raw)[4]),
476 		be16_to_cpu(((__be16 *)gid_raw)[5]),
477 		be16_to_cpu(((__be16 *)gid_raw)[6]),
478 		be16_to_cpu(((__be16 *)gid_raw)[7]));
479 }
480 
481 struct smc_pci_dev {
482 	__u32		pci_fid;
483 	__u16		pci_pchid;
484 	__u16		pci_vendor;
485 	__u16		pci_device;
486 	__u8		pci_id[SMC_PCI_ID_STR_LEN];
487 };
488 
smc_set_pci_values(struct pci_dev * pci_dev,struct smc_pci_dev * smc_dev)489 static inline void smc_set_pci_values(struct pci_dev *pci_dev,
490 				      struct smc_pci_dev *smc_dev)
491 {
492 	smc_dev->pci_vendor = pci_dev->vendor;
493 	smc_dev->pci_device = pci_dev->device;
494 	snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s",
495 		 pci_name(pci_dev));
496 #if IS_ENABLED(CONFIG_S390)
497 	{ /* Set s390 specific PCI information */
498 	struct zpci_dev *zdev;
499 
500 	zdev = to_zpci(pci_dev);
501 	smc_dev->pci_fid = zdev->fid;
502 	smc_dev->pci_pchid = zdev->pchid;
503 	}
504 #endif
505 }
506 
507 struct smc_sock;
508 struct smc_clc_msg_accept_confirm;
509 
510 void smc_lgr_cleanup_early(struct smc_link_group *lgr);
511 void smc_lgr_terminate_sched(struct smc_link_group *lgr);
512 void smc_lgr_hold(struct smc_link_group *lgr);
513 void smc_lgr_put(struct smc_link_group *lgr);
514 void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport);
515 void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport);
516 void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,
517 			unsigned short vlan);
518 void smc_smcd_terminate_all(struct smcd_dev *dev);
519 void smc_smcr_terminate_all(struct smc_ib_device *smcibdev);
520 int smc_buf_create(struct smc_sock *smc, bool is_smcd);
521 int smc_uncompress_bufsize(u8 compressed);
522 int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link,
523 			    struct smc_clc_msg_accept_confirm *clc);
524 int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey);
525 int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey);
526 void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new,
527 		    __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey);
528 void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id,
529 		     __be64 nw_vaddr, __be32 nw_rkey);
530 void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn);
531 void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn);
532 int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini);
533 
534 void smc_conn_free(struct smc_connection *conn);
535 int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini);
536 void smc_lgr_schedule_free_work_fast(struct smc_link_group *lgr);
537 int smc_core_init(void);
538 void smc_core_exit(void);
539 
540 int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
541 		   u8 link_idx, struct smc_init_info *ini);
542 void smcr_link_clear(struct smc_link *lnk, bool log);
543 void smcr_link_hold(struct smc_link *lnk);
544 void smcr_link_put(struct smc_link *lnk);
545 void smc_switch_link_and_count(struct smc_connection *conn,
546 			       struct smc_link *to_lnk);
547 int smcr_buf_map_lgr(struct smc_link *lnk);
548 int smcr_buf_reg_lgr(struct smc_link *lnk);
549 void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);
550 void smcr_lgr_set_type_asym(struct smc_link_group *lgr,
551 			    enum smc_lgr_type new_type, int asym_lnk_idx);
552 int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc);
553 struct smc_link *smc_switch_conns(struct smc_link_group *lgr,
554 				  struct smc_link *from_lnk, bool is_dev_err);
555 void smcr_link_down_cond(struct smc_link *lnk);
556 void smcr_link_down_cond_sched(struct smc_link *lnk);
557 int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb);
558 int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
559 int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb);
560 int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
561 
smc_get_lgr(struct smc_link * link)562 static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)
563 {
564 	return link->lgr;
565 }
566 #endif
567