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 */ 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 } 428 429 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 */ 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 */ 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 } 462 463 static inline bool smc_link_active(struct smc_link *lnk) 464 { 465 return lnk->state == SMC_LNK_ACTIVE; 466 } 467 468 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 }; 488 489 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); 561 562 static inline struct smc_link_group *smc_get_lgr(struct smc_link *link) 563 { 564 return link->lgr; 565 } 566 #endif 567