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 35struct 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 41enum smc_lgr_role { /* possible roles of a link group */ 42 SMC_CLNT, /* client */ 43 SMC_SERV /* server */ 44}; 45 46enum 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 56struct smc_wr_buf { 57 u8 raw[SMC_WR_BUF_SIZE]; 58}; 59 60struct 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 66enum 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 72struct 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 80struct smc_rdma_sges { /* sges per message send */ 81 struct smc_rdma_sge tx_rdma_sge[SMC_MAX_RDMA_WRITES]; 82}; 83 84struct 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 92struct 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 */ 187struct 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 228struct 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 240struct smcd_dev; 241 242enum 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 250enum 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 256enum 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 264struct smc_llc_qentry; 265 266struct smc_llc_flow { 267 enum smc_llc_flowtype type; 268 struct smc_llc_qentry *qentry; 269}; 270 271struct 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 368struct smc_clc_msg_local; 369 370#define GID_LIST_SIZE 2 371 372struct smc_gidlist { 373 u8 len; 374 u8 list[GID_LIST_SIZE][SMC_GID_SIZE]; 375}; 376 377struct 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 395struct 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 */ 434static 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 460static 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 */ 472static 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 */ 488static 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 494static inline bool smc_link_active(struct smc_link *lnk) 495{ 496 return lnk->state == SMC_LNK_ACTIVE; 497} 498 499static 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 512struct 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 520static 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 538struct smc_sock; 539struct smc_clc_msg_accept_confirm; 540 541void smc_lgr_cleanup_early(struct smc_link_group *lgr); 542void smc_lgr_terminate_sched(struct smc_link_group *lgr); 543void smc_lgr_hold(struct smc_link_group *lgr); 544void smc_lgr_put(struct smc_link_group *lgr); 545void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport); 546void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport); 547void smc_smcd_terminate(struct smcd_dev *dev, u64 peer_gid, 548 unsigned short vlan); 549void smc_smcd_terminate_all(struct smcd_dev *dev); 550void smc_smcr_terminate_all(struct smc_ib_device *smcibdev); 551int smc_buf_create(struct smc_sock *smc, bool is_smcd); 552int smc_uncompress_bufsize(u8 compressed); 553int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link, 554 struct smc_clc_msg_accept_confirm *clc); 555int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey); 556int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey); 557void 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); 559void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id, 560 __be64 nw_vaddr, __be32 nw_rkey); 561void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn); 562void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn); 563int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini); 564 565void smc_conn_free(struct smc_connection *conn); 566int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini); 567int smc_core_init(void); 568void smc_core_exit(void); 569 570int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk, 571 u8 link_idx, struct smc_init_info *ini); 572void smcr_link_clear(struct smc_link *lnk, bool log); 573void smcr_link_hold(struct smc_link *lnk); 574void smcr_link_put(struct smc_link *lnk); 575void smc_switch_link_and_count(struct smc_connection *conn, 576 struct smc_link *to_lnk); 577int smcr_buf_map_lgr(struct smc_link *lnk); 578int smcr_buf_reg_lgr(struct smc_link *lnk); 579void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type); 580void smcr_lgr_set_type_asym(struct smc_link_group *lgr, 581 enum smc_lgr_type new_type, int asym_lnk_idx); 582int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc); 583struct smc_link *smc_switch_conns(struct smc_link_group *lgr, 584 struct smc_link *from_lnk, bool is_dev_err); 585void smcr_link_down_cond(struct smc_link *lnk); 586void smcr_link_down_cond_sched(struct smc_link *lnk); 587int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb); 588int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); 589int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb); 590int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); 591 592static inline struct smc_link_group *smc_get_lgr(struct smc_link *link) 593{ 594 return link->lgr; 595} 596#endif 597