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 #define SMC_CONN_PER_LGR_MIN	16	/* min. # of connections per link group */
26 #define SMC_CONN_PER_LGR_MAX	255	/* max. # of connections per link group,
27 					 * also is the default value for SMC-R v1 and v2.0
28 					 */
29 #define SMC_CONN_PER_LGR_PREFER	255	/* Preferred connections per link group used for
30 					 * SMC-R v2.1 and later negotiation, vendors or
31 					 * distrubutions may modify it to a value between
32 					 * 16-255 as needed.
33 					 */
34 
35 struct smc_lgr_list {			/* list of link group definition */
36 	struct list_head	list;
37 	spinlock_t		lock;	/* protects list of link groups */
38 	u32			num;	/* unique link group number */
39 };
40 
41 enum smc_lgr_role {		/* possible roles of a link group */
42 	SMC_CLNT,	/* client */
43 	SMC_SERV	/* server */
44 };
45 
46 enum smc_link_state {			/* possible states of a link */
47 	SMC_LNK_UNUSED,		/* link is unused */
48 	SMC_LNK_INACTIVE,	/* link is inactive */
49 	SMC_LNK_ACTIVATING,	/* link is being activated */
50 	SMC_LNK_ACTIVE,		/* link is active */
51 };
52 
53 #define SMC_WR_BUF_SIZE		48	/* size of work request buffer */
54 #define SMC_WR_BUF_V2_SIZE	8192	/* size of v2 work request buffer */
55 
56 struct smc_wr_buf {
57 	u8	raw[SMC_WR_BUF_SIZE];
58 };
59 
60 struct smc_wr_v2_buf {
61 	u8	raw[SMC_WR_BUF_V2_SIZE];
62 };
63 
64 #define SMC_WR_REG_MR_WAIT_TIME	(5 * HZ)/* wait time for ib_wr_reg_mr result */
65 
66 enum smc_wr_reg_state {
67 	POSTED,		/* ib_wr_reg_mr request posted */
68 	CONFIRMED,	/* ib_wr_reg_mr response: successful */
69 	FAILED		/* ib_wr_reg_mr response: failure */
70 };
71 
72 struct smc_rdma_sge {				/* sges for RDMA writes */
73 	struct ib_sge		wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE];
74 };
75 
76 #define SMC_MAX_RDMA_WRITES	2		/* max. # of RDMA writes per
77 						 * message send
78 						 */
79 
80 struct smc_rdma_sges {				/* sges per message send */
81 	struct smc_rdma_sge	tx_rdma_sge[SMC_MAX_RDMA_WRITES];
82 };
83 
84 struct smc_rdma_wr {				/* work requests per message
85 						 * send
86 						 */
87 	struct ib_rdma_wr	wr_tx_rdma[SMC_MAX_RDMA_WRITES];
88 };
89 
90 #define SMC_LGR_ID_SIZE		4
91 
92 struct smc_link {
93 	struct smc_ib_device	*smcibdev;	/* ib-device */
94 	u8			ibport;		/* port - values 1 | 2 */
95 	struct ib_pd		*roce_pd;	/* IB protection domain,
96 						 * unique for every RoCE QP
97 						 */
98 	struct ib_qp		*roce_qp;	/* IB queue pair */
99 	struct ib_qp_attr	qp_attr;	/* IB queue pair attributes */
100 
101 	struct smc_wr_buf	*wr_tx_bufs;	/* WR send payload buffers */
102 	struct ib_send_wr	*wr_tx_ibs;	/* WR send meta data */
103 	struct ib_sge		*wr_tx_sges;	/* WR send gather meta data */
104 	struct smc_rdma_sges	*wr_tx_rdma_sges;/*RDMA WRITE gather meta data*/
105 	struct smc_rdma_wr	*wr_tx_rdmas;	/* WR RDMA WRITE */
106 	struct smc_wr_tx_pend	*wr_tx_pends;	/* WR send waiting for CQE */
107 	struct completion	*wr_tx_compl;	/* WR send CQE completion */
108 	/* above four vectors have wr_tx_cnt elements and use the same index */
109 	struct ib_send_wr	*wr_tx_v2_ib;	/* WR send v2 meta data */
110 	struct ib_sge		*wr_tx_v2_sge;	/* WR send v2 gather meta data*/
111 	struct smc_wr_tx_pend	*wr_tx_v2_pend;	/* WR send v2 waiting for CQE */
112 	dma_addr_t		wr_tx_dma_addr;	/* DMA address of wr_tx_bufs */
113 	dma_addr_t		wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/
114 	atomic_long_t		wr_tx_id;	/* seq # of last sent WR */
115 	unsigned long		*wr_tx_mask;	/* bit mask of used indexes */
116 	u32			wr_tx_cnt;	/* number of WR send buffers */
117 	wait_queue_head_t	wr_tx_wait;	/* wait for free WR send buf */
118 	struct {
119 		struct percpu_ref	wr_tx_refs;
120 	} ____cacheline_aligned_in_smp;
121 	struct completion	tx_ref_comp;
122 
123 	struct smc_wr_buf	*wr_rx_bufs;	/* WR recv payload buffers */
124 	struct ib_recv_wr	*wr_rx_ibs;	/* WR recv meta data */
125 	struct ib_sge		*wr_rx_sges;	/* WR recv scatter meta data */
126 	/* above three vectors have wr_rx_cnt elements and use the same index */
127 	dma_addr_t		wr_rx_dma_addr;	/* DMA address of wr_rx_bufs */
128 	dma_addr_t		wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/
129 	u64			wr_rx_id;	/* seq # of last recv WR */
130 	u64			wr_rx_id_compl; /* seq # of last completed WR */
131 	u32			wr_rx_cnt;	/* number of WR recv buffers */
132 	unsigned long		wr_rx_tstamp;	/* jiffies when last buf rx */
133 	wait_queue_head_t       wr_rx_empty_wait; /* wait for RQ empty */
134 
135 	struct ib_reg_wr	wr_reg;		/* WR register memory region */
136 	wait_queue_head_t	wr_reg_wait;	/* wait for wr_reg result */
137 	struct {
138 		struct percpu_ref	wr_reg_refs;
139 	} ____cacheline_aligned_in_smp;
140 	struct completion	reg_ref_comp;
141 	enum smc_wr_reg_state	wr_reg_state;	/* state of wr_reg request */
142 
143 	u8			gid[SMC_GID_SIZE];/* gid matching used vlan id*/
144 	u8			sgid_index;	/* gid index for vlan id      */
145 	u32			peer_qpn;	/* QP number of peer */
146 	enum ib_mtu		path_mtu;	/* used mtu */
147 	enum ib_mtu		peer_mtu;	/* mtu size of peer */
148 	u32			psn_initial;	/* QP tx initial packet seqno */
149 	u32			peer_psn;	/* QP rx initial packet seqno */
150 	u8			peer_mac[ETH_ALEN];	/* = gid[8:10||13:15] */
151 	u8			peer_gid[SMC_GID_SIZE];	/* gid of peer*/
152 	u8			link_id;	/* unique # within link group */
153 	u8			link_uid[SMC_LGR_ID_SIZE]; /* unique lnk id */
154 	u8			peer_link_uid[SMC_LGR_ID_SIZE]; /* peer uid */
155 	u8			link_idx;	/* index in lgr link array */
156 	u8			link_is_asym;	/* is link asymmetric? */
157 	u8			clearing : 1;	/* link is being cleared */
158 	refcount_t		refcnt;		/* link reference count */
159 	struct smc_link_group	*lgr;		/* parent link group */
160 	struct work_struct	link_down_wrk;	/* wrk to bring link down */
161 	char			ibname[IB_DEVICE_NAME_MAX]; /* ib device name */
162 	int			ndev_ifidx; /* network device ifindex */
163 
164 	enum smc_link_state	state;		/* state of link */
165 	struct delayed_work	llc_testlink_wrk; /* testlink worker */
166 	struct completion	llc_testlink_resp; /* wait for rx of testlink */
167 	int			llc_testlink_time; /* testlink interval */
168 	atomic_t		conn_cnt; /* connections on this link */
169 };
170 
171 /* For now we just allow one parallel link per link group. The SMC protocol
172  * allows more (up to 8).
173  */
174 #define SMC_LINKS_PER_LGR_MAX	3
175 #define SMC_SINGLE_LINK		0
176 #define SMC_LINKS_ADD_LNK_MIN	1	/* min. # of links per link group */
177 #define SMC_LINKS_ADD_LNK_MAX	2	/* max. # of links per link group, also is the
178 					 * default value for smc-r v1.0 and v2.0
179 					 */
180 #define SMC_LINKS_PER_LGR_MAX_PREFER	2	/* Preferred max links per link group used for
181 						 * SMC-R v2.1 and later negotiation, vendors or
182 						 * distrubutions may modify it to a value between
183 						 * 1-2 as needed.
184 						 */
185 
186 /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */
187 struct smc_buf_desc {
188 	struct list_head	list;
189 	void			*cpu_addr;	/* virtual address of buffer */
190 	struct page		*pages;
191 	int			len;		/* length of buffer */
192 	u32			used;		/* currently used / unused */
193 	union {
194 		struct { /* SMC-R */
195 			struct sg_table	sgt[SMC_LINKS_PER_LGR_MAX];
196 					/* virtual buffer */
197 			struct ib_mr	*mr[SMC_LINKS_PER_LGR_MAX];
198 					/* memory region: for rmb and
199 					 * vzalloced sndbuf
200 					 * incl. rkey provided to peer
201 					 * and lkey provided to local
202 					 */
203 			u32		order;	/* allocation order */
204 
205 			u8		is_conf_rkey;
206 					/* confirm_rkey done */
207 			u8		is_reg_mr[SMC_LINKS_PER_LGR_MAX];
208 					/* mem region registered */
209 			u8		is_map_ib[SMC_LINKS_PER_LGR_MAX];
210 					/* mem region mapped to lnk */
211 			u8		is_dma_need_sync;
212 			u8		is_reg_err;
213 					/* buffer registration err */
214 			u8		is_vm;
215 					/* virtually contiguous */
216 		};
217 		struct { /* SMC-D */
218 			unsigned short	sba_idx;
219 					/* SBA index number */
220 			u64		token;
221 					/* DMB token number */
222 			dma_addr_t	dma_addr;
223 					/* DMA address */
224 		};
225 	};
226 };
227 
228 struct smc_rtoken {				/* address/key of remote RMB */
229 	u64			dma_addr;
230 	u32			rkey;
231 };
232 
233 #define SMC_BUF_MIN_SIZE	16384	/* minimum size of an RMB */
234 #define SMC_RMBE_SIZES		16	/* number of distinct RMBE sizes */
235 /* theoretically, the RFC states that largest size would be 512K,
236  * i.e. compressed 5 and thus 6 sizes (0..5), despite
237  * struct smc_clc_msg_accept_confirm.rmbe_size being a 4 bit value (0..15)
238  */
239 
240 struct smcd_dev;
241 
242 enum smc_lgr_type {				/* redundancy state of lgr */
243 	SMC_LGR_NONE,			/* no active links, lgr to be deleted */
244 	SMC_LGR_SINGLE,			/* 1 active RNIC on each peer */
245 	SMC_LGR_SYMMETRIC,		/* 2 active RNICs on each peer */
246 	SMC_LGR_ASYMMETRIC_PEER,	/* local has 2, peer 1 active RNICs */
247 	SMC_LGR_ASYMMETRIC_LOCAL,	/* local has 1, peer 2 active RNICs */
248 };
249 
250 enum smcr_buf_type {		/* types of SMC-R sndbufs and RMBs */
251 	SMCR_PHYS_CONT_BUFS	= 0,
252 	SMCR_VIRT_CONT_BUFS	= 1,
253 	SMCR_MIXED_BUFS		= 2,
254 };
255 
256 enum smc_llc_flowtype {
257 	SMC_LLC_FLOW_NONE	= 0,
258 	SMC_LLC_FLOW_ADD_LINK	= 2,
259 	SMC_LLC_FLOW_DEL_LINK	= 4,
260 	SMC_LLC_FLOW_REQ_ADD_LINK = 5,
261 	SMC_LLC_FLOW_RKEY	= 6,
262 };
263 
264 struct smc_llc_qentry;
265 
266 struct smc_llc_flow {
267 	enum smc_llc_flowtype type;
268 	struct smc_llc_qentry *qentry;
269 };
270 
271 struct smc_link_group {
272 	struct list_head	list;
273 	struct rb_root		conns_all;	/* connection tree */
274 	rwlock_t		conns_lock;	/* protects conns_all */
275 	unsigned int		conns_num;	/* current # of connections */
276 	unsigned short		vlan_id;	/* vlan id of link group */
277 
278 	struct list_head	sndbufs[SMC_RMBE_SIZES];/* tx buffers */
279 	struct rw_semaphore	sndbufs_lock;	/* protects tx buffers */
280 	struct list_head	rmbs[SMC_RMBE_SIZES];	/* rx buffers */
281 	struct rw_semaphore	rmbs_lock;	/* protects rx buffers */
282 
283 	u8			id[SMC_LGR_ID_SIZE];	/* unique lgr id */
284 	struct delayed_work	free_work;	/* delayed freeing of an lgr */
285 	struct work_struct	terminate_work;	/* abnormal lgr termination */
286 	struct workqueue_struct	*tx_wq;		/* wq for conn. tx workers */
287 	u8			sync_err : 1;	/* lgr no longer fits to peer */
288 	u8			terminating : 1;/* lgr is terminating */
289 	u8			freeing : 1;	/* lgr is being freed */
290 
291 	refcount_t		refcnt;		/* lgr reference count */
292 	bool			is_smcd;	/* SMC-R or SMC-D */
293 	u8			smc_version;
294 	u8			negotiated_eid[SMC_MAX_EID_LEN];
295 	u8			peer_os;	/* peer operating system */
296 	u8			peer_smc_release;
297 	u8			peer_hostname[SMC_MAX_HOSTNAME_LEN];
298 	union {
299 		struct { /* SMC-R */
300 			enum smc_lgr_role	role;
301 						/* client or server */
302 			struct smc_link		lnk[SMC_LINKS_PER_LGR_MAX];
303 						/* smc link */
304 			struct smc_wr_v2_buf	*wr_rx_buf_v2;
305 						/* WR v2 recv payload buffer */
306 			struct smc_wr_v2_buf	*wr_tx_buf_v2;
307 						/* WR v2 send payload buffer */
308 			char			peer_systemid[SMC_SYSTEMID_LEN];
309 						/* unique system_id of peer */
310 			struct smc_rtoken	rtokens[SMC_RMBS_PER_LGR_MAX]
311 						[SMC_LINKS_PER_LGR_MAX];
312 						/* remote addr/key pairs */
313 			DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX);
314 						/* used rtoken elements */
315 			u8			next_link_id;
316 			enum smc_lgr_type	type;
317 			enum smcr_buf_type	buf_type;
318 						/* redundancy state */
319 			u8			pnet_id[SMC_MAX_PNETID_LEN + 1];
320 						/* pnet id of this lgr */
321 			struct list_head	llc_event_q;
322 						/* queue for llc events */
323 			spinlock_t		llc_event_q_lock;
324 						/* protects llc_event_q */
325 			struct rw_semaphore	llc_conf_mutex;
326 						/* protects lgr reconfig. */
327 			struct work_struct	llc_add_link_work;
328 			struct work_struct	llc_del_link_work;
329 			struct work_struct	llc_event_work;
330 						/* llc event worker */
331 			wait_queue_head_t	llc_flow_waiter;
332 						/* w4 next llc event */
333 			wait_queue_head_t	llc_msg_waiter;
334 						/* w4 next llc msg */
335 			struct smc_llc_flow	llc_flow_lcl;
336 						/* llc local control field */
337 			struct smc_llc_flow	llc_flow_rmt;
338 						/* llc remote control field */
339 			struct smc_llc_qentry	*delayed_event;
340 						/* arrived when flow active */
341 			spinlock_t		llc_flow_lock;
342 						/* protects llc flow */
343 			int			llc_testlink_time;
344 						/* link keep alive time */
345 			u32			llc_termination_rsn;
346 						/* rsn code for termination */
347 			u8			nexthop_mac[ETH_ALEN];
348 			u8			uses_gateway;
349 			__be32			saddr;
350 						/* net namespace */
351 			struct net		*net;
352 			u8			max_conns;
353 						/* max conn can be assigned to lgr */
354 			u8			max_links;
355 						/* max links can be added in lgr */
356 		};
357 		struct { /* SMC-D */
358 			u64			peer_gid;
359 						/* Peer GID (remote) */
360 			struct smcd_dev		*smcd;
361 						/* ISM device for VLAN reg. */
362 			u8			peer_shutdown : 1;
363 						/* peer triggered shutdownn */
364 		};
365 	};
366 };
367 
368 struct smc_clc_msg_local;
369 
370 #define GID_LIST_SIZE	2
371 
372 struct smc_gidlist {
373 	u8			len;
374 	u8			list[GID_LIST_SIZE][SMC_GID_SIZE];
375 };
376 
377 struct smc_init_info_smcrv2 {
378 	/* Input fields */
379 	__be32			saddr;
380 	struct sock		*clc_sk;
381 	__be32			daddr;
382 
383 	/* Output fields when saddr is set */
384 	struct smc_ib_device	*ib_dev_v2;
385 	u8			ib_port_v2;
386 	u8			ib_gid_v2[SMC_GID_SIZE];
387 
388 	/* Additional output fields when clc_sk and daddr is set as well */
389 	u8			uses_gateway;
390 	u8			nexthop_mac[ETH_ALEN];
391 
392 	struct smc_gidlist	gidlist;
393 };
394 
395 struct smc_init_info {
396 	u8			is_smcd;
397 	u8			smc_type_v1;
398 	u8			smc_type_v2;
399 	u8			release_nr;
400 	u8			max_conns;
401 	u8			max_links;
402 	u8			first_contact_peer;
403 	u8			first_contact_local;
404 	unsigned short		vlan_id;
405 	u32			rc;
406 	u8			negotiated_eid[SMC_MAX_EID_LEN];
407 	/* SMC-R */
408 	u8			smcr_version;
409 	u8			check_smcrv2;
410 	u8			peer_gid[SMC_GID_SIZE];
411 	u8			peer_mac[ETH_ALEN];
412 	u8			peer_systemid[SMC_SYSTEMID_LEN];
413 	struct smc_ib_device	*ib_dev;
414 	u8			ib_gid[SMC_GID_SIZE];
415 	u8			ib_port;
416 	u32			ib_clcqpn;
417 	struct smc_init_info_smcrv2 smcrv2;
418 	/* SMC-D */
419 	u64			ism_peer_gid[SMC_MAX_ISM_DEVS + 1];
420 	struct smcd_dev		*ism_dev[SMC_MAX_ISM_DEVS + 1];
421 	u16			ism_chid[SMC_MAX_ISM_DEVS + 1];
422 	u8			ism_offered_cnt; /* # of ISM devices offered */
423 	u8			ism_selected;    /* index of selected ISM dev*/
424 	u8			smcd_version;
425 };
426 
427 /* Find the connection associated with the given alert token in the link group.
428  * To use rbtrees we have to implement our own search core.
429  * Requires @conns_lock
430  * @token	alert token to search for
431  * @lgr		 link group to search in
432  * Returns connection associated with token if found, NULL otherwise.
433  */
smc_lgr_find_conn(u32 token,struct smc_link_group * lgr)434 static inline struct smc_connection *smc_lgr_find_conn(
435 	u32 token, struct smc_link_group *lgr)
436 {
437 	struct smc_connection *res = NULL;
438 	struct rb_node *node;
439 
440 	node = lgr->conns_all.rb_node;
441 	while (node) {
442 		struct smc_connection *cur = rb_entry(node,
443 					struct smc_connection, alert_node);
444 
445 		if (cur->alert_token_local > token) {
446 			node = node->rb_left;
447 		} else {
448 			if (cur->alert_token_local < token) {
449 				node = node->rb_right;
450 			} else {
451 				res = cur;
452 				break;
453 			}
454 		}
455 	}
456 
457 	return res;
458 }
459 
smc_conn_lgr_valid(struct smc_connection * conn)460 static inline bool smc_conn_lgr_valid(struct smc_connection *conn)
461 {
462 	return conn->lgr && conn->alert_token_local;
463 }
464 
465 /*
466  * Returns true if the specified link is usable.
467  *
468  * usable means the link is ready to receive RDMA messages, map memory
469  * on the link, etc. This doesn't ensure we are able to send RDMA messages
470  * on this link, if sending RDMA messages is needed, use smc_link_sendable()
471  */
smc_link_usable(struct smc_link * lnk)472 static inline bool smc_link_usable(struct smc_link *lnk)
473 {
474 	if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE)
475 		return false;
476 	return true;
477 }
478 
479 /*
480  * Returns true if the specified link is ready to receive AND send RDMA
481  * messages.
482  *
483  * For the client side in first contact, the underlying QP may still in
484  * RESET or RTR when the link state is ACTIVATING, checks in smc_link_usable()
485  * is not strong enough. For those places that need to send any CDC or LLC
486  * messages, use smc_link_sendable(), otherwise, use smc_link_usable() instead
487  */
smc_link_sendable(struct smc_link * lnk)488 static inline bool smc_link_sendable(struct smc_link *lnk)
489 {
490 	return smc_link_usable(lnk) &&
491 		lnk->qp_attr.cur_qp_state == IB_QPS_RTS;
492 }
493 
smc_link_active(struct smc_link * lnk)494 static inline bool smc_link_active(struct smc_link *lnk)
495 {
496 	return lnk->state == SMC_LNK_ACTIVE;
497 }
498 
smc_gid_be16_convert(__u8 * buf,u8 * gid_raw)499 static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
500 {
501 	sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
502 		be16_to_cpu(((__be16 *)gid_raw)[0]),
503 		be16_to_cpu(((__be16 *)gid_raw)[1]),
504 		be16_to_cpu(((__be16 *)gid_raw)[2]),
505 		be16_to_cpu(((__be16 *)gid_raw)[3]),
506 		be16_to_cpu(((__be16 *)gid_raw)[4]),
507 		be16_to_cpu(((__be16 *)gid_raw)[5]),
508 		be16_to_cpu(((__be16 *)gid_raw)[6]),
509 		be16_to_cpu(((__be16 *)gid_raw)[7]));
510 }
511 
512 struct smc_pci_dev {
513 	__u32		pci_fid;
514 	__u16		pci_pchid;
515 	__u16		pci_vendor;
516 	__u16		pci_device;
517 	__u8		pci_id[SMC_PCI_ID_STR_LEN];
518 };
519 
smc_set_pci_values(struct pci_dev * pci_dev,struct smc_pci_dev * smc_dev)520 static inline void smc_set_pci_values(struct pci_dev *pci_dev,
521 				      struct smc_pci_dev *smc_dev)
522 {
523 	smc_dev->pci_vendor = pci_dev->vendor;
524 	smc_dev->pci_device = pci_dev->device;
525 	snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s",
526 		 pci_name(pci_dev));
527 #if IS_ENABLED(CONFIG_S390)
528 	{ /* Set s390 specific PCI information */
529 	struct zpci_dev *zdev;
530 
531 	zdev = to_zpci(pci_dev);
532 	smc_dev->pci_fid = zdev->fid;
533 	smc_dev->pci_pchid = zdev->pchid;
534 	}
535 #endif
536 }
537 
538 struct smc_sock;
539 struct smc_clc_msg_accept_confirm;
540 
541 void smc_lgr_cleanup_early(struct smc_link_group *lgr);
542 void smc_lgr_terminate_sched(struct smc_link_group *lgr);
543 void smc_lgr_hold(struct smc_link_group *lgr);
544 void smc_lgr_put(struct smc_link_group *lgr);
545 void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport);
546 void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport);
547 void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid,
548 			unsigned short vlan);
549 void smc_smcd_terminate_all(struct smcd_dev *dev);
550 void smc_smcr_terminate_all(struct smc_ib_device *smcibdev);
551 int smc_buf_create(struct smc_sock *smc, bool is_smcd);
552 int smc_uncompress_bufsize(u8 compressed);
553 int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link,
554 			    struct smc_clc_msg_accept_confirm *clc);
555 int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey);
556 int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey);
557 void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new,
558 		    __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey);
559 void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id,
560 		     __be64 nw_vaddr, __be32 nw_rkey);
561 void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn);
562 void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn);
563 int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini);
564 
565 void smc_conn_free(struct smc_connection *conn);
566 int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini);
567 int smc_core_init(void);
568 void smc_core_exit(void);
569 
570 int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
571 		   u8 link_idx, struct smc_init_info *ini);
572 void smcr_link_clear(struct smc_link *lnk, bool log);
573 void smcr_link_hold(struct smc_link *lnk);
574 void smcr_link_put(struct smc_link *lnk);
575 void smc_switch_link_and_count(struct smc_connection *conn,
576 			       struct smc_link *to_lnk);
577 int smcr_buf_map_lgr(struct smc_link *lnk);
578 int smcr_buf_reg_lgr(struct smc_link *lnk);
579 void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type);
580 void smcr_lgr_set_type_asym(struct smc_link_group *lgr,
581 			    enum smc_lgr_type new_type, int asym_lnk_idx);
582 int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc);
583 struct smc_link *smc_switch_conns(struct smc_link_group *lgr,
584 				  struct smc_link *from_lnk, bool is_dev_err);
585 void smcr_link_down_cond(struct smc_link *lnk);
586 void smcr_link_down_cond_sched(struct smc_link *lnk);
587 int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb);
588 int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
589 int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb);
590 int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb);
591 
smc_get_lgr(struct smc_link * link)592 static inline struct smc_link_group *smc_get_lgr(struct smc_link *link)
593 {
594 	return link->lgr;
595 }
596 #endif
597