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