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 #include <net/smc.h> 21 22 #include "smc.h" 23 #include "smc_ib.h" 24 #include "smc_clc.h" 25 26 #define SMC_RMBS_PER_LGR_MAX 255 /* max. # of RMBs per link group */ 27 #define SMC_CONN_PER_LGR_MIN 16 /* min. # of connections per link group */ 28 #define SMC_CONN_PER_LGR_MAX 255 /* max. # of connections per link group, 29 * also is the default value for SMC-R v1 and v2.0 30 */ 31 #define SMC_CONN_PER_LGR_PREFER 255 /* Preferred connections per link group used for 32 * SMC-R v2.1 and later negotiation, vendors or 33 * distrubutions may modify it to a value between 34 * 16-255 as needed. 35 */ 36 37 struct smc_lgr_list { /* list of link group definition */ 38 struct list_head list; 39 spinlock_t lock; /* protects list of link groups */ 40 u32 num; /* unique link group number */ 41 }; 42 43 enum smc_lgr_role { /* possible roles of a link group */ 44 SMC_CLNT, /* client */ 45 SMC_SERV /* server */ 46 }; 47 48 enum smc_link_state { /* possible states of a link */ 49 SMC_LNK_UNUSED, /* link is unused */ 50 SMC_LNK_INACTIVE, /* link is inactive */ 51 SMC_LNK_ACTIVATING, /* link is being activated */ 52 SMC_LNK_ACTIVE, /* link is active */ 53 }; 54 55 #define SMC_WR_BUF_SIZE 48 /* size of work request buffer */ 56 #define SMC_WR_BUF_V2_SIZE 8192 /* size of v2 work request buffer */ 57 58 struct smc_wr_buf { 59 u8 raw[SMC_WR_BUF_SIZE]; 60 }; 61 62 struct smc_wr_v2_buf { 63 u8 raw[SMC_WR_BUF_V2_SIZE]; 64 }; 65 66 #define SMC_WR_REG_MR_WAIT_TIME (5 * HZ)/* wait time for ib_wr_reg_mr result */ 67 68 enum smc_wr_reg_state { 69 POSTED, /* ib_wr_reg_mr request posted */ 70 CONFIRMED, /* ib_wr_reg_mr response: successful */ 71 FAILED /* ib_wr_reg_mr response: failure */ 72 }; 73 74 struct smc_rdma_sge { /* sges for RDMA writes */ 75 struct ib_sge wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE]; 76 }; 77 78 #define SMC_MAX_RDMA_WRITES 2 /* max. # of RDMA writes per 79 * message send 80 */ 81 82 struct smc_rdma_sges { /* sges per message send */ 83 struct smc_rdma_sge tx_rdma_sge[SMC_MAX_RDMA_WRITES]; 84 }; 85 86 struct smc_rdma_wr { /* work requests per message 87 * send 88 */ 89 struct ib_rdma_wr wr_tx_rdma[SMC_MAX_RDMA_WRITES]; 90 }; 91 92 #define SMC_LGR_ID_SIZE 4 93 94 struct smc_link { 95 struct smc_ib_device *smcibdev; /* ib-device */ 96 u8 ibport; /* port - values 1 | 2 */ 97 struct ib_pd *roce_pd; /* IB protection domain, 98 * unique for every RoCE QP 99 */ 100 struct ib_qp *roce_qp; /* IB queue pair */ 101 struct ib_qp_attr qp_attr; /* IB queue pair attributes */ 102 103 struct smc_wr_buf *wr_tx_bufs; /* WR send payload buffers */ 104 struct ib_send_wr *wr_tx_ibs; /* WR send meta data */ 105 struct ib_sge *wr_tx_sges; /* WR send gather meta data */ 106 struct smc_rdma_sges *wr_tx_rdma_sges;/*RDMA WRITE gather meta data*/ 107 struct smc_rdma_wr *wr_tx_rdmas; /* WR RDMA WRITE */ 108 struct smc_wr_tx_pend *wr_tx_pends; /* WR send waiting for CQE */ 109 struct completion *wr_tx_compl; /* WR send CQE completion */ 110 /* above four vectors have wr_tx_cnt elements and use the same index */ 111 struct ib_send_wr *wr_tx_v2_ib; /* WR send v2 meta data */ 112 struct ib_sge *wr_tx_v2_sge; /* WR send v2 gather meta data*/ 113 struct smc_wr_tx_pend *wr_tx_v2_pend; /* WR send v2 waiting for CQE */ 114 dma_addr_t wr_tx_dma_addr; /* DMA address of wr_tx_bufs */ 115 dma_addr_t wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/ 116 atomic_long_t wr_tx_id; /* seq # of last sent WR */ 117 unsigned long *wr_tx_mask; /* bit mask of used indexes */ 118 u32 wr_tx_cnt; /* number of WR send buffers */ 119 wait_queue_head_t wr_tx_wait; /* wait for free WR send buf */ 120 struct { 121 struct percpu_ref wr_tx_refs; 122 } ____cacheline_aligned_in_smp; 123 struct completion tx_ref_comp; 124 125 struct smc_wr_buf *wr_rx_bufs; /* WR recv payload buffers */ 126 struct ib_recv_wr *wr_rx_ibs; /* WR recv meta data */ 127 struct ib_sge *wr_rx_sges; /* WR recv scatter meta data */ 128 /* above three vectors have wr_rx_cnt elements and use the same index */ 129 dma_addr_t wr_rx_dma_addr; /* DMA address of wr_rx_bufs */ 130 dma_addr_t wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/ 131 u64 wr_rx_id; /* seq # of last recv WR */ 132 u64 wr_rx_id_compl; /* seq # of last completed WR */ 133 u32 wr_rx_cnt; /* number of WR recv buffers */ 134 unsigned long wr_rx_tstamp; /* jiffies when last buf rx */ 135 wait_queue_head_t wr_rx_empty_wait; /* wait for RQ empty */ 136 137 struct ib_reg_wr wr_reg; /* WR register memory region */ 138 wait_queue_head_t wr_reg_wait; /* wait for wr_reg result */ 139 struct { 140 struct percpu_ref wr_reg_refs; 141 } ____cacheline_aligned_in_smp; 142 struct completion reg_ref_comp; 143 enum smc_wr_reg_state wr_reg_state; /* state of wr_reg request */ 144 145 u8 gid[SMC_GID_SIZE];/* gid matching used vlan id*/ 146 u8 sgid_index; /* gid index for vlan id */ 147 u32 peer_qpn; /* QP number of peer */ 148 enum ib_mtu path_mtu; /* used mtu */ 149 enum ib_mtu peer_mtu; /* mtu size of peer */ 150 u32 psn_initial; /* QP tx initial packet seqno */ 151 u32 peer_psn; /* QP rx initial packet seqno */ 152 u8 peer_mac[ETH_ALEN]; /* = gid[8:10||13:15] */ 153 u8 peer_gid[SMC_GID_SIZE]; /* gid of peer*/ 154 u8 link_id; /* unique # within link group */ 155 u8 link_uid[SMC_LGR_ID_SIZE]; /* unique lnk id */ 156 u8 peer_link_uid[SMC_LGR_ID_SIZE]; /* peer uid */ 157 u8 link_idx; /* index in lgr link array */ 158 u8 link_is_asym; /* is link asymmetric? */ 159 u8 clearing : 1; /* link is being cleared */ 160 refcount_t refcnt; /* link reference count */ 161 struct smc_link_group *lgr; /* parent link group */ 162 struct work_struct link_down_wrk; /* wrk to bring link down */ 163 char ibname[IB_DEVICE_NAME_MAX]; /* ib device name */ 164 int ndev_ifidx; /* network device ifindex */ 165 166 enum smc_link_state state; /* state of link */ 167 struct delayed_work llc_testlink_wrk; /* testlink worker */ 168 struct completion llc_testlink_resp; /* wait for rx of testlink */ 169 int llc_testlink_time; /* testlink interval */ 170 atomic_t conn_cnt; /* connections on this link */ 171 }; 172 173 /* For now we just allow one parallel link per link group. The SMC protocol 174 * allows more (up to 8). 175 */ 176 #define SMC_LINKS_PER_LGR_MAX 3 177 #define SMC_SINGLE_LINK 0 178 #define SMC_LINKS_ADD_LNK_MIN 1 /* min. # of links per link group */ 179 #define SMC_LINKS_ADD_LNK_MAX 2 /* max. # of links per link group, also is the 180 * default value for smc-r v1.0 and v2.0 181 */ 182 #define SMC_LINKS_PER_LGR_MAX_PREFER 2 /* Preferred max links per link group used for 183 * SMC-R v2.1 and later negotiation, vendors or 184 * distrubutions may modify it to a value between 185 * 1-2 as needed. 186 */ 187 188 /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */ 189 struct smc_buf_desc { 190 struct list_head list; 191 void *cpu_addr; /* virtual address of buffer */ 192 struct page *pages; 193 int len; /* length of buffer */ 194 u32 used; /* currently used / unused */ 195 union { 196 struct { /* SMC-R */ 197 struct sg_table sgt[SMC_LINKS_PER_LGR_MAX]; 198 /* virtual buffer */ 199 struct ib_mr *mr[SMC_LINKS_PER_LGR_MAX]; 200 /* memory region: for rmb and 201 * vzalloced sndbuf 202 * incl. rkey provided to peer 203 * and lkey provided to local 204 */ 205 u32 order; /* allocation order */ 206 207 u8 is_conf_rkey; 208 /* confirm_rkey done */ 209 u8 is_reg_mr[SMC_LINKS_PER_LGR_MAX]; 210 /* mem region registered */ 211 u8 is_map_ib[SMC_LINKS_PER_LGR_MAX]; 212 /* mem region mapped to lnk */ 213 u8 is_dma_need_sync; 214 u8 is_reg_err; 215 /* buffer registration err */ 216 u8 is_vm; 217 /* virtually contiguous */ 218 }; 219 struct { /* SMC-D */ 220 unsigned short sba_idx; 221 /* SBA index number */ 222 u64 token; 223 /* DMB token number */ 224 dma_addr_t dma_addr; 225 /* DMA address */ 226 }; 227 }; 228 }; 229 230 struct smc_rtoken { /* address/key of remote RMB */ 231 u64 dma_addr; 232 u32 rkey; 233 }; 234 235 #define SMC_BUF_MIN_SIZE 16384 /* minimum size of an RMB */ 236 #define SMC_RMBE_SIZES 16 /* number of distinct RMBE sizes */ 237 /* theoretically, the RFC states that largest size would be 512K, 238 * i.e. compressed 5 and thus 6 sizes (0..5), despite 239 * struct smc_clc_msg_accept_confirm.rmbe_size being a 4 bit value (0..15) 240 */ 241 242 struct smcd_dev; 243 244 enum smc_lgr_type { /* redundancy state of lgr */ 245 SMC_LGR_NONE, /* no active links, lgr to be deleted */ 246 SMC_LGR_SINGLE, /* 1 active RNIC on each peer */ 247 SMC_LGR_SYMMETRIC, /* 2 active RNICs on each peer */ 248 SMC_LGR_ASYMMETRIC_PEER, /* local has 2, peer 1 active RNICs */ 249 SMC_LGR_ASYMMETRIC_LOCAL, /* local has 1, peer 2 active RNICs */ 250 }; 251 252 enum smcr_buf_type { /* types of SMC-R sndbufs and RMBs */ 253 SMCR_PHYS_CONT_BUFS = 0, 254 SMCR_VIRT_CONT_BUFS = 1, 255 SMCR_MIXED_BUFS = 2, 256 }; 257 258 enum smc_llc_flowtype { 259 SMC_LLC_FLOW_NONE = 0, 260 SMC_LLC_FLOW_ADD_LINK = 2, 261 SMC_LLC_FLOW_DEL_LINK = 4, 262 SMC_LLC_FLOW_REQ_ADD_LINK = 5, 263 SMC_LLC_FLOW_RKEY = 6, 264 }; 265 266 struct smc_llc_qentry; 267 268 struct smc_llc_flow { 269 enum smc_llc_flowtype type; 270 struct smc_llc_qentry *qentry; 271 }; 272 273 struct smc_link_group { 274 struct list_head list; 275 struct rb_root conns_all; /* connection tree */ 276 rwlock_t conns_lock; /* protects conns_all */ 277 unsigned int conns_num; /* current # of connections */ 278 unsigned short vlan_id; /* vlan id of link group */ 279 280 struct list_head sndbufs[SMC_RMBE_SIZES];/* tx buffers */ 281 struct rw_semaphore sndbufs_lock; /* protects tx buffers */ 282 struct list_head rmbs[SMC_RMBE_SIZES]; /* rx buffers */ 283 struct rw_semaphore rmbs_lock; /* protects rx buffers */ 284 u64 alloc_sndbufs; /* stats of tx buffers */ 285 u64 alloc_rmbs; /* stats of rx buffers */ 286 287 u8 id[SMC_LGR_ID_SIZE]; /* unique lgr id */ 288 struct delayed_work free_work; /* delayed freeing of an lgr */ 289 struct work_struct terminate_work; /* abnormal lgr termination */ 290 struct workqueue_struct *tx_wq; /* wq for conn. tx workers */ 291 u8 sync_err : 1; /* lgr no longer fits to peer */ 292 u8 terminating : 1;/* lgr is terminating */ 293 u8 freeing : 1; /* lgr is being freed */ 294 295 refcount_t refcnt; /* lgr reference count */ 296 bool is_smcd; /* SMC-R or SMC-D */ 297 u8 smc_version; 298 u8 negotiated_eid[SMC_MAX_EID_LEN]; 299 u8 peer_os; /* peer operating system */ 300 u8 peer_smc_release; 301 u8 peer_hostname[SMC_MAX_HOSTNAME_LEN]; 302 union { 303 struct { /* SMC-R */ 304 enum smc_lgr_role role; 305 /* client or server */ 306 struct smc_link lnk[SMC_LINKS_PER_LGR_MAX]; 307 /* smc link */ 308 struct smc_wr_v2_buf *wr_rx_buf_v2; 309 /* WR v2 recv payload buffer */ 310 struct smc_wr_v2_buf *wr_tx_buf_v2; 311 /* WR v2 send payload buffer */ 312 char peer_systemid[SMC_SYSTEMID_LEN]; 313 /* unique system_id of peer */ 314 struct smc_rtoken rtokens[SMC_RMBS_PER_LGR_MAX] 315 [SMC_LINKS_PER_LGR_MAX]; 316 /* remote addr/key pairs */ 317 DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX); 318 /* used rtoken elements */ 319 u8 next_link_id; 320 enum smc_lgr_type type; 321 enum smcr_buf_type buf_type; 322 /* redundancy state */ 323 u8 pnet_id[SMC_MAX_PNETID_LEN + 1]; 324 /* pnet id of this lgr */ 325 struct list_head llc_event_q; 326 /* queue for llc events */ 327 spinlock_t llc_event_q_lock; 328 /* protects llc_event_q */ 329 struct rw_semaphore llc_conf_mutex; 330 /* protects lgr reconfig. */ 331 struct work_struct llc_add_link_work; 332 struct work_struct llc_del_link_work; 333 struct work_struct llc_event_work; 334 /* llc event worker */ 335 wait_queue_head_t llc_flow_waiter; 336 /* w4 next llc event */ 337 wait_queue_head_t llc_msg_waiter; 338 /* w4 next llc msg */ 339 struct smc_llc_flow llc_flow_lcl; 340 /* llc local control field */ 341 struct smc_llc_flow llc_flow_rmt; 342 /* llc remote control field */ 343 struct smc_llc_qentry *delayed_event; 344 /* arrived when flow active */ 345 spinlock_t llc_flow_lock; 346 /* protects llc flow */ 347 int llc_testlink_time; 348 /* link keep alive time */ 349 u32 llc_termination_rsn; 350 /* rsn code for termination */ 351 u8 nexthop_mac[ETH_ALEN]; 352 u8 uses_gateway; 353 __be32 saddr; 354 /* net namespace */ 355 struct net *net; 356 u8 max_conns; 357 /* max conn can be assigned to lgr */ 358 u8 max_links; 359 /* max links can be added in lgr */ 360 }; 361 struct { /* SMC-D */ 362 struct smcd_gid peer_gid; 363 /* Peer GID (remote) */ 364 struct smcd_dev *smcd; 365 /* ISM device for VLAN reg. */ 366 u8 peer_shutdown : 1; 367 /* peer triggered shutdownn */ 368 }; 369 }; 370 }; 371 372 struct smc_clc_msg_local; 373 374 #define GID_LIST_SIZE 2 375 376 struct smc_gidlist { 377 u8 len; 378 u8 list[GID_LIST_SIZE][SMC_GID_SIZE]; 379 }; 380 381 struct smc_init_info_smcrv2 { 382 /* Input fields */ 383 __be32 saddr; 384 struct sock *clc_sk; 385 __be32 daddr; 386 387 /* Output fields when saddr is set */ 388 struct smc_ib_device *ib_dev_v2; 389 u8 ib_port_v2; 390 u8 ib_gid_v2[SMC_GID_SIZE]; 391 392 /* Additional output fields when clc_sk and daddr is set as well */ 393 u8 uses_gateway; 394 u8 nexthop_mac[ETH_ALEN]; 395 396 struct smc_gidlist gidlist; 397 }; 398 399 #define SMC_MAX_V2_ISM_DEVS SMCD_CLC_MAX_V2_GID_ENTRIES 400 /* max # of proposed non-native ISM devices, 401 * which can't exceed the max # of CHID-GID 402 * entries in CLC proposal SMC-Dv2 extension. 403 */ 404 struct smc_init_info { 405 u8 is_smcd; 406 u8 smc_type_v1; 407 u8 smc_type_v2; 408 u8 release_nr; 409 u8 max_conns; 410 u8 max_links; 411 u8 first_contact_peer; 412 u8 first_contact_local; 413 u16 feature_mask; 414 unsigned short vlan_id; 415 u32 rc; 416 u8 negotiated_eid[SMC_MAX_EID_LEN]; 417 /* SMC-R */ 418 u8 smcr_version; 419 u8 check_smcrv2; 420 u8 peer_gid[SMC_GID_SIZE]; 421 u8 peer_mac[ETH_ALEN]; 422 u8 peer_systemid[SMC_SYSTEMID_LEN]; 423 struct smc_ib_device *ib_dev; 424 u8 ib_gid[SMC_GID_SIZE]; 425 u8 ib_port; 426 u32 ib_clcqpn; 427 struct smc_init_info_smcrv2 smcrv2; 428 /* SMC-D */ 429 struct smcd_gid ism_peer_gid[SMC_MAX_V2_ISM_DEVS + 1]; 430 struct smcd_dev *ism_dev[SMC_MAX_V2_ISM_DEVS + 1]; 431 u16 ism_chid[SMC_MAX_V2_ISM_DEVS + 1]; 432 u8 ism_offered_cnt; /* # of ISM devices offered */ 433 u8 ism_selected; /* index of selected ISM dev*/ 434 u8 smcd_version; 435 }; 436 437 /* Find the connection associated with the given alert token in the link group. 438 * To use rbtrees we have to implement our own search core. 439 * Requires @conns_lock 440 * @token alert token to search for 441 * @lgr link group to search in 442 * Returns connection associated with token if found, NULL otherwise. 443 */ 444 static inline struct smc_connection *smc_lgr_find_conn( 445 u32 token, struct smc_link_group *lgr) 446 { 447 struct smc_connection *res = NULL; 448 struct rb_node *node; 449 450 node = lgr->conns_all.rb_node; 451 while (node) { 452 struct smc_connection *cur = rb_entry(node, 453 struct smc_connection, alert_node); 454 455 if (cur->alert_token_local > token) { 456 node = node->rb_left; 457 } else { 458 if (cur->alert_token_local < token) { 459 node = node->rb_right; 460 } else { 461 res = cur; 462 break; 463 } 464 } 465 } 466 467 return res; 468 } 469 470 static inline bool smc_conn_lgr_valid(struct smc_connection *conn) 471 { 472 return conn->lgr && conn->alert_token_local; 473 } 474 475 /* 476 * Returns true if the specified link is usable. 477 * 478 * usable means the link is ready to receive RDMA messages, map memory 479 * on the link, etc. This doesn't ensure we are able to send RDMA messages 480 * on this link, if sending RDMA messages is needed, use smc_link_sendable() 481 */ 482 static inline bool smc_link_usable(struct smc_link *lnk) 483 { 484 if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE) 485 return false; 486 return true; 487 } 488 489 /* 490 * Returns true if the specified link is ready to receive AND send RDMA 491 * messages. 492 * 493 * For the client side in first contact, the underlying QP may still in 494 * RESET or RTR when the link state is ACTIVATING, checks in smc_link_usable() 495 * is not strong enough. For those places that need to send any CDC or LLC 496 * messages, use smc_link_sendable(), otherwise, use smc_link_usable() instead 497 */ 498 static inline bool smc_link_sendable(struct smc_link *lnk) 499 { 500 return smc_link_usable(lnk) && 501 lnk->qp_attr.cur_qp_state == IB_QPS_RTS; 502 } 503 504 static inline bool smc_link_active(struct smc_link *lnk) 505 { 506 return lnk->state == SMC_LNK_ACTIVE; 507 } 508 509 static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw) 510 { 511 sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", 512 be16_to_cpu(((__be16 *)gid_raw)[0]), 513 be16_to_cpu(((__be16 *)gid_raw)[1]), 514 be16_to_cpu(((__be16 *)gid_raw)[2]), 515 be16_to_cpu(((__be16 *)gid_raw)[3]), 516 be16_to_cpu(((__be16 *)gid_raw)[4]), 517 be16_to_cpu(((__be16 *)gid_raw)[5]), 518 be16_to_cpu(((__be16 *)gid_raw)[6]), 519 be16_to_cpu(((__be16 *)gid_raw)[7])); 520 } 521 522 struct smc_pci_dev { 523 __u32 pci_fid; 524 __u16 pci_pchid; 525 __u16 pci_vendor; 526 __u16 pci_device; 527 __u8 pci_id[SMC_PCI_ID_STR_LEN]; 528 }; 529 530 static inline void smc_set_pci_values(struct pci_dev *pci_dev, 531 struct smc_pci_dev *smc_dev) 532 { 533 smc_dev->pci_vendor = pci_dev->vendor; 534 smc_dev->pci_device = pci_dev->device; 535 snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s", 536 pci_name(pci_dev)); 537 #if IS_ENABLED(CONFIG_S390) 538 { /* Set s390 specific PCI information */ 539 struct zpci_dev *zdev; 540 541 zdev = to_zpci(pci_dev); 542 smc_dev->pci_fid = zdev->fid; 543 smc_dev->pci_pchid = zdev->pchid; 544 } 545 #endif 546 } 547 548 struct smc_sock; 549 struct smc_clc_msg_accept_confirm; 550 551 void smc_lgr_cleanup_early(struct smc_link_group *lgr); 552 void smc_lgr_terminate_sched(struct smc_link_group *lgr); 553 void smc_lgr_hold(struct smc_link_group *lgr); 554 void smc_lgr_put(struct smc_link_group *lgr); 555 void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport); 556 void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport); 557 void smc_smcd_terminate(struct smcd_dev *dev, struct smcd_gid *peer_gid, 558 unsigned short vlan); 559 void smc_smcd_terminate_all(struct smcd_dev *dev); 560 void smc_smcr_terminate_all(struct smc_ib_device *smcibdev); 561 int smc_buf_create(struct smc_sock *smc, bool is_smcd); 562 int smcd_buf_attach(struct smc_sock *smc); 563 int smc_uncompress_bufsize(u8 compressed); 564 int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link, 565 struct smc_clc_msg_accept_confirm *clc); 566 int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey); 567 int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey); 568 void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new, 569 __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey); 570 void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id, 571 __be64 nw_vaddr, __be32 nw_rkey); 572 void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn); 573 void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn); 574 int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini); 575 576 void smc_conn_free(struct smc_connection *conn); 577 int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini); 578 int smc_core_init(void); 579 void smc_core_exit(void); 580 581 int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk, 582 u8 link_idx, struct smc_init_info *ini); 583 void smcr_link_clear(struct smc_link *lnk, bool log); 584 void smcr_link_hold(struct smc_link *lnk); 585 void smcr_link_put(struct smc_link *lnk); 586 void smc_switch_link_and_count(struct smc_connection *conn, 587 struct smc_link *to_lnk); 588 int smcr_buf_map_lgr(struct smc_link *lnk); 589 int smcr_buf_reg_lgr(struct smc_link *lnk); 590 void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type); 591 void smcr_lgr_set_type_asym(struct smc_link_group *lgr, 592 enum smc_lgr_type new_type, int asym_lnk_idx); 593 int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc); 594 struct smc_link *smc_switch_conns(struct smc_link_group *lgr, 595 struct smc_link *from_lnk, bool is_dev_err); 596 void smcr_link_down_cond(struct smc_link *lnk); 597 void smcr_link_down_cond_sched(struct smc_link *lnk); 598 int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb); 599 int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); 600 int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb); 601 int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); 602 603 static inline struct smc_link_group *smc_get_lgr(struct smc_link *link) 604 { 605 return link->lgr; 606 } 607 #endif 608