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/types.h> 17 #include <linux/smc.h> 18 #include <linux/pci.h> 19 #include <rdma/ib_verbs.h> 20 #include <net/genetlink.h> 21 #include <net/smc.h> 22 23 #include "smc.h" 24 #include "smc_ib.h" 25 #include "smc_clc.h" 26 27 #define SMC_RMBS_PER_LGR_MAX 255 /* max. # of RMBs per link group */ 28 #define SMC_CONN_PER_LGR_MIN 16 /* min. # of connections per link group */ 29 #define SMC_CONN_PER_LGR_MAX 255 /* max. # of connections per link group, 30 * also is the default value for SMC-R v1 and v2.0 31 */ 32 #define SMC_CONN_PER_LGR_PREFER 255 /* Preferred connections per link group used for 33 * SMC-R v2.1 and later negotiation, vendors or 34 * distributions may modify it to a value between 35 * 16-255 as needed. 36 */ 37 38 struct smc_lgr_list { /* list of link group definition */ 39 struct list_head list; 40 spinlock_t lock; /* protects list of link groups */ 41 u32 num; /* unique link group number */ 42 }; 43 44 enum smc_lgr_role { /* possible roles of a link group */ 45 SMC_CLNT, /* client */ 46 SMC_SERV /* server */ 47 }; 48 49 enum smc_link_state { /* possible states of a link */ 50 SMC_LNK_UNUSED, /* link is unused */ 51 SMC_LNK_INACTIVE, /* link is inactive */ 52 SMC_LNK_ACTIVATING, /* link is being activated */ 53 SMC_LNK_ACTIVE, /* link is active */ 54 }; 55 56 #define SMC_WR_BUF_SIZE 48 /* size of work request buffer */ 57 #define SMC_WR_BUF_V2_SIZE 8192 /* size of v2 work request buffer */ 58 59 struct smc_wr_buf { 60 u8 raw[SMC_WR_BUF_SIZE]; 61 }; 62 63 struct smc_wr_v2_buf { 64 u8 raw[SMC_WR_BUF_V2_SIZE]; 65 }; 66 67 #define SMC_WR_REG_MR_WAIT_TIME (5 * HZ)/* wait time for ib_wr_reg_mr result */ 68 69 enum smc_wr_reg_state { 70 POSTED, /* ib_wr_reg_mr request posted */ 71 CONFIRMED, /* ib_wr_reg_mr response: successful */ 72 FAILED /* ib_wr_reg_mr response: failure */ 73 }; 74 75 struct smc_rdma_sge { /* sges for RDMA writes */ 76 struct ib_sge wr_tx_rdma_sge[SMC_IB_MAX_SEND_SGE]; 77 }; 78 79 #define SMC_MAX_RDMA_WRITES 2 /* max. # of RDMA writes per 80 * message send 81 */ 82 83 struct smc_rdma_sges { /* sges per message send */ 84 struct smc_rdma_sge tx_rdma_sge[SMC_MAX_RDMA_WRITES]; 85 }; 86 87 struct smc_rdma_wr { /* work requests per message 88 * send 89 */ 90 struct ib_rdma_wr wr_tx_rdma[SMC_MAX_RDMA_WRITES]; 91 }; 92 93 #define SMC_LGR_ID_SIZE 4 94 95 struct smc_link { 96 struct smc_ib_device *smcibdev; /* ib-device */ 97 u8 ibport; /* port - values 1 | 2 */ 98 struct ib_pd *roce_pd; /* IB protection domain, 99 * unique for every RoCE QP 100 */ 101 struct ib_qp *roce_qp; /* IB queue pair */ 102 struct ib_qp_attr qp_attr; /* IB queue pair attributes */ 103 104 struct smc_wr_buf *wr_tx_bufs; /* WR send payload buffers */ 105 struct ib_send_wr *wr_tx_ibs; /* WR send meta data */ 106 struct ib_sge *wr_tx_sges; /* WR send gather meta data */ 107 struct smc_rdma_sges *wr_tx_rdma_sges;/*RDMA WRITE gather meta data*/ 108 struct smc_rdma_wr *wr_tx_rdmas; /* WR RDMA WRITE */ 109 struct smc_wr_tx_pend *wr_tx_pends; /* WR send waiting for CQE */ 110 struct completion *wr_tx_compl; /* WR send CQE completion */ 111 /* above four vectors have wr_tx_cnt elements and use the same index */ 112 struct ib_send_wr *wr_tx_v2_ib; /* WR send v2 meta data */ 113 struct ib_sge *wr_tx_v2_sge; /* WR send v2 gather meta data*/ 114 struct smc_wr_tx_pend *wr_tx_v2_pend; /* WR send v2 waiting for CQE */ 115 dma_addr_t wr_tx_dma_addr; /* DMA address of wr_tx_bufs */ 116 dma_addr_t wr_tx_v2_dma_addr; /* DMA address of v2 tx buf*/ 117 atomic_long_t wr_tx_id; /* seq # of last sent WR */ 118 unsigned long *wr_tx_mask; /* bit mask of used indexes */ 119 u32 wr_tx_cnt; /* number of WR send buffers */ 120 wait_queue_head_t wr_tx_wait; /* wait for free WR send buf */ 121 struct { 122 struct percpu_ref wr_tx_refs; 123 } ____cacheline_aligned_in_smp; 124 struct completion tx_ref_comp; 125 126 u8 *wr_rx_bufs; /* WR recv payload buffers */ 127 struct ib_recv_wr *wr_rx_ibs; /* WR recv meta data */ 128 struct ib_sge *wr_rx_sges; /* WR recv scatter meta data */ 129 /* above three vectors have wr_rx_cnt elements and use the same index */ 130 int wr_rx_sge_cnt; /* rx sge, V1 is 1, V2 is either 2 or 1 */ 131 int wr_rx_buflen; /* buffer len for the first sge, len for the 132 * second sge is lgr shared if rx sge is 2. 133 */ 134 dma_addr_t wr_rx_dma_addr; /* DMA address of wr_rx_bufs */ 135 dma_addr_t wr_rx_v2_dma_addr; /* DMA address of v2 rx buf*/ 136 u64 wr_rx_id; /* seq # of last recv WR */ 137 u64 wr_rx_id_compl; /* seq # of last completed WR */ 138 u32 wr_rx_cnt; /* number of WR recv buffers */ 139 unsigned long wr_rx_tstamp; /* jiffies when last buf rx */ 140 wait_queue_head_t wr_rx_empty_wait; /* wait for RQ empty */ 141 142 struct ib_reg_wr wr_reg; /* WR register memory region */ 143 wait_queue_head_t wr_reg_wait; /* wait for wr_reg result */ 144 struct { 145 struct percpu_ref wr_reg_refs; 146 } ____cacheline_aligned_in_smp; 147 struct completion reg_ref_comp; 148 enum smc_wr_reg_state wr_reg_state; /* state of wr_reg request */ 149 150 u8 gid[SMC_GID_SIZE];/* gid matching used vlan id*/ 151 u8 sgid_index; /* gid index for vlan id */ 152 u32 peer_qpn; /* QP number of peer */ 153 enum ib_mtu path_mtu; /* used mtu */ 154 enum ib_mtu peer_mtu; /* mtu size of peer */ 155 u32 psn_initial; /* QP tx initial packet seqno */ 156 u32 peer_psn; /* QP rx initial packet seqno */ 157 u8 peer_mac[ETH_ALEN]; /* = gid[8:10||13:15] */ 158 u8 peer_gid[SMC_GID_SIZE]; /* gid of peer*/ 159 u8 link_id; /* unique # within link group */ 160 u8 link_uid[SMC_LGR_ID_SIZE]; /* unique lnk id */ 161 u8 peer_link_uid[SMC_LGR_ID_SIZE]; /* peer uid */ 162 u8 link_idx; /* index in lgr link array */ 163 u8 link_is_asym; /* is link asymmetric? */ 164 u8 clearing : 1; /* link is being cleared */ 165 refcount_t refcnt; /* link reference count */ 166 struct smc_link_group *lgr; /* parent link group */ 167 struct work_struct link_down_wrk; /* wrk to bring link down */ 168 char ibname[IB_DEVICE_NAME_MAX]; /* ib device name */ 169 int ndev_ifidx; /* network device ifindex */ 170 171 enum smc_link_state state; /* state of link */ 172 struct delayed_work llc_testlink_wrk; /* testlink worker */ 173 struct completion llc_testlink_resp; /* wait for rx of testlink */ 174 int llc_testlink_time; /* testlink interval */ 175 atomic_t conn_cnt; /* connections on this link */ 176 }; 177 178 /* For now we just allow one parallel link per link group. The SMC protocol 179 * allows more (up to 8). 180 */ 181 #define SMC_LINKS_PER_LGR_MAX 3 182 #define SMC_SINGLE_LINK 0 183 #define SMC_LINKS_ADD_LNK_MIN 1 /* min. # of links per link group */ 184 #define SMC_LINKS_ADD_LNK_MAX 2 /* max. # of links per link group, also is the 185 * default value for smc-r v1.0 and v2.0 186 */ 187 #define SMC_LINKS_PER_LGR_MAX_PREFER 2 /* Preferred max links per link group used for 188 * SMC-R v2.1 and later negotiation, vendors or 189 * distributions may modify it to a value between 190 * 1-2 as needed. 191 */ 192 193 /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */ 194 struct smc_buf_desc { 195 struct list_head list; 196 void *cpu_addr; /* virtual address of buffer */ 197 struct page *pages; 198 int len; /* length of buffer */ 199 u32 used; /* currently used / unused */ 200 union { 201 struct { /* SMC-R */ 202 struct sg_table sgt[SMC_LINKS_PER_LGR_MAX]; 203 /* virtual buffer */ 204 struct ib_mr *mr[SMC_LINKS_PER_LGR_MAX]; 205 /* memory region: for rmb and 206 * vzalloced sndbuf 207 * incl. rkey provided to peer 208 * and lkey provided to local 209 */ 210 u32 order; /* allocation order */ 211 212 u8 is_conf_rkey; 213 /* confirm_rkey done */ 214 u8 is_reg_mr[SMC_LINKS_PER_LGR_MAX]; 215 /* mem region registered */ 216 u8 is_map_ib[SMC_LINKS_PER_LGR_MAX]; 217 /* mem region mapped to lnk */ 218 u8 is_dma_need_sync; 219 u8 is_reg_err; 220 /* buffer registration err */ 221 u8 is_vm; 222 /* virtually contiguous */ 223 }; 224 struct { /* SMC-D */ 225 /* SMC-D tx buffer */ 226 bool is_attached; 227 /* no need for explicit writes */ 228 /* SMC-D rx buffer: */ 229 unsigned short sba_idx; 230 /* SBA index number */ 231 u64 token; 232 /* DMB token number */ 233 dma_addr_t dma_addr; 234 /* DMA address */ 235 }; 236 }; 237 }; 238 239 struct smc_rtoken { /* address/key of remote RMB */ 240 u64 dma_addr; 241 u32 rkey; 242 }; 243 244 #define SMC_BUF_MIN_SIZE 16384 /* minimum size of an RMB */ 245 #define SMC_RMBE_SIZES 16 /* number of distinct RMBE sizes */ 246 /* theoretically, the RFC states that largest size would be 512K, 247 * i.e. compressed 5 and thus 6 sizes (0..5), despite 248 * struct smc_clc_msg_accept_confirm.rmbe_size being a 4 bit value (0..15) 249 */ 250 251 struct smcd_dev; 252 253 enum smc_lgr_type { /* redundancy state of lgr */ 254 SMC_LGR_NONE, /* no active links, lgr to be deleted */ 255 SMC_LGR_SINGLE, /* 1 active RNIC on each peer */ 256 SMC_LGR_SYMMETRIC, /* 2 active RNICs on each peer */ 257 SMC_LGR_ASYMMETRIC_PEER, /* local has 2, peer 1 active RNICs */ 258 SMC_LGR_ASYMMETRIC_LOCAL, /* local has 1, peer 2 active RNICs */ 259 }; 260 261 enum smcr_buf_type { /* types of SMC-R sndbufs and RMBs */ 262 SMCR_PHYS_CONT_BUFS = 0, 263 SMCR_VIRT_CONT_BUFS = 1, 264 SMCR_MIXED_BUFS = 2, 265 }; 266 267 enum smc_llc_flowtype { 268 SMC_LLC_FLOW_NONE = 0, 269 SMC_LLC_FLOW_ADD_LINK = 2, 270 SMC_LLC_FLOW_DEL_LINK = 4, 271 SMC_LLC_FLOW_REQ_ADD_LINK = 5, 272 SMC_LLC_FLOW_RKEY = 6, 273 }; 274 275 struct smc_llc_qentry; 276 277 struct smc_llc_flow { 278 enum smc_llc_flowtype type; 279 struct smc_llc_qentry *qentry; 280 }; 281 282 struct smc_link_group { 283 struct list_head list; 284 struct rb_root conns_all; /* connection tree */ 285 rwlock_t conns_lock; /* protects conns_all */ 286 unsigned int conns_num; /* current # of connections */ 287 unsigned short vlan_id; /* vlan id of link group */ 288 289 struct list_head sndbufs[SMC_RMBE_SIZES];/* tx buffers */ 290 struct rw_semaphore sndbufs_lock; /* protects tx buffers */ 291 struct list_head rmbs[SMC_RMBE_SIZES]; /* rx buffers */ 292 struct rw_semaphore rmbs_lock; /* protects rx buffers */ 293 u64 alloc_sndbufs; /* stats of tx buffers */ 294 u64 alloc_rmbs; /* stats of rx buffers */ 295 296 u8 id[SMC_LGR_ID_SIZE]; /* unique lgr id */ 297 struct delayed_work free_work; /* delayed freeing of an lgr */ 298 struct work_struct terminate_work; /* abnormal lgr termination */ 299 struct workqueue_struct *tx_wq; /* wq for conn. tx workers */ 300 u8 sync_err : 1; /* lgr no longer fits to peer */ 301 u8 terminating : 1;/* lgr is terminating */ 302 u8 freeing : 1; /* lgr is being freed */ 303 304 refcount_t refcnt; /* lgr reference count */ 305 bool is_smcd; /* SMC-R or SMC-D */ 306 u8 smc_version; 307 u8 negotiated_eid[SMC_MAX_EID_LEN]; 308 u8 peer_os; /* peer operating system */ 309 u8 peer_smc_release; 310 u8 peer_hostname[SMC_MAX_HOSTNAME_LEN]; 311 union { 312 struct { /* SMC-R */ 313 enum smc_lgr_role role; 314 /* client or server */ 315 struct smc_link lnk[SMC_LINKS_PER_LGR_MAX]; 316 /* smc link */ 317 struct smc_wr_v2_buf *wr_rx_buf_v2; 318 /* WR v2 recv payload buffer */ 319 struct smc_wr_v2_buf *wr_tx_buf_v2; 320 /* WR v2 send payload buffer */ 321 char peer_systemid[SMC_SYSTEMID_LEN]; 322 /* unique system_id of peer */ 323 struct smc_rtoken rtokens[SMC_RMBS_PER_LGR_MAX] 324 [SMC_LINKS_PER_LGR_MAX]; 325 /* remote addr/key pairs */ 326 DECLARE_BITMAP(rtokens_used_mask, SMC_RMBS_PER_LGR_MAX); 327 /* used rtoken elements */ 328 u8 next_link_id; 329 enum smc_lgr_type type; 330 enum smcr_buf_type buf_type; 331 /* redundancy state */ 332 u8 pnet_id[SMC_MAX_PNETID_LEN + 1]; 333 /* pnet id of this lgr */ 334 struct list_head llc_event_q; 335 /* queue for llc events */ 336 spinlock_t llc_event_q_lock; 337 /* protects llc_event_q */ 338 struct rw_semaphore llc_conf_mutex; 339 /* protects lgr reconfig. */ 340 struct work_struct llc_add_link_work; 341 struct work_struct llc_del_link_work; 342 struct work_struct llc_event_work; 343 /* llc event worker */ 344 wait_queue_head_t llc_flow_waiter; 345 /* w4 next llc event */ 346 wait_queue_head_t llc_msg_waiter; 347 /* w4 next llc msg */ 348 struct smc_llc_flow llc_flow_lcl; 349 /* llc local control field */ 350 struct smc_llc_flow llc_flow_rmt; 351 /* llc remote control field */ 352 struct smc_llc_qentry *delayed_event; 353 /* arrived when flow active */ 354 spinlock_t llc_flow_lock; 355 /* protects llc flow */ 356 int llc_testlink_time; 357 /* link keep alive time */ 358 u32 llc_termination_rsn; 359 /* rsn code for termination */ 360 u8 nexthop_mac[ETH_ALEN]; 361 u8 uses_gateway; 362 __be32 saddr; 363 /* net namespace */ 364 struct net *net; 365 u8 max_conns; 366 /* max conn can be assigned to lgr */ 367 u8 max_links; 368 /* max links can be added in lgr */ 369 }; 370 struct { /* SMC-D */ 371 struct smcd_gid peer_gid; 372 /* Peer GID (remote) */ 373 struct smcd_dev *smcd; 374 /* ISM device for VLAN reg. */ 375 u8 peer_shutdown : 1; 376 /* peer triggered shutdownn */ 377 }; 378 }; 379 }; 380 381 struct smc_clc_msg_local; 382 383 #define GID_LIST_SIZE 2 384 385 struct smc_gidlist { 386 u8 len; 387 u8 list[GID_LIST_SIZE][SMC_GID_SIZE]; 388 }; 389 390 struct smc_init_info_smcrv2 { 391 /* Input fields */ 392 __be32 saddr; 393 struct sock *clc_sk; 394 __be32 daddr; 395 396 /* Output fields when saddr is set */ 397 struct smc_ib_device *ib_dev_v2; 398 u8 ib_port_v2; 399 u8 ib_gid_v2[SMC_GID_SIZE]; 400 401 /* Additional output fields when clc_sk and daddr is set as well */ 402 u8 uses_gateway; 403 u8 nexthop_mac[ETH_ALEN]; 404 405 struct smc_gidlist gidlist; 406 }; 407 408 #define SMC_MAX_V2_ISM_DEVS SMCD_CLC_MAX_V2_GID_ENTRIES 409 /* max # of proposed non-native ISM devices, 410 * which can't exceed the max # of CHID-GID 411 * entries in CLC proposal SMC-Dv2 extension. 412 */ 413 struct smc_init_info { 414 u8 is_smcd; 415 u8 smc_type_v1; 416 u8 smc_type_v2; 417 u8 release_nr; 418 u8 max_conns; 419 u8 max_links; 420 u8 first_contact_peer; 421 u8 first_contact_local; 422 u16 feature_mask; 423 unsigned short vlan_id; 424 u32 rc; 425 u8 negotiated_eid[SMC_MAX_EID_LEN]; 426 /* SMC-R */ 427 u8 smcr_version; 428 u8 check_smcrv2; 429 u8 peer_gid[SMC_GID_SIZE]; 430 u8 peer_mac[ETH_ALEN]; 431 u8 peer_systemid[SMC_SYSTEMID_LEN]; 432 struct smc_ib_device *ib_dev; 433 u8 ib_gid[SMC_GID_SIZE]; 434 u8 ib_port; 435 u32 ib_clcqpn; 436 struct smc_init_info_smcrv2 smcrv2; 437 /* SMC-D */ 438 struct smcd_gid ism_peer_gid[SMC_MAX_V2_ISM_DEVS + 1]; 439 struct smcd_dev *ism_dev[SMC_MAX_V2_ISM_DEVS + 1]; 440 u16 ism_chid[SMC_MAX_V2_ISM_DEVS + 1]; 441 u8 ism_offered_cnt; /* # of ISM devices offered */ 442 u8 ism_selected; /* index of selected ISM dev*/ 443 u8 smcd_version; 444 }; 445 446 /* Find the connection associated with the given alert token in the link group. 447 * To use rbtrees we have to implement our own search core. 448 * Requires @conns_lock 449 * @token alert token to search for 450 * @lgr link group to search in 451 * Returns connection associated with token if found, NULL otherwise. 452 */ 453 static inline struct smc_connection *smc_lgr_find_conn( 454 u32 token, struct smc_link_group *lgr) 455 { 456 struct smc_connection *res = NULL; 457 struct rb_node *node; 458 459 node = lgr->conns_all.rb_node; 460 while (node) { 461 struct smc_connection *cur = rb_entry(node, 462 struct smc_connection, alert_node); 463 464 if (cur->alert_token_local > token) { 465 node = node->rb_left; 466 } else { 467 if (cur->alert_token_local < token) { 468 node = node->rb_right; 469 } else { 470 res = cur; 471 break; 472 } 473 } 474 } 475 476 return res; 477 } 478 479 static inline bool smc_conn_lgr_valid(struct smc_connection *conn) 480 { 481 return conn->lgr && conn->alert_token_local; 482 } 483 484 /* 485 * Returns true if the specified link is usable. 486 * 487 * usable means the link is ready to receive RDMA messages, map memory 488 * on the link, etc. This doesn't ensure we are able to send RDMA messages 489 * on this link, if sending RDMA messages is needed, use smc_link_sendable() 490 */ 491 static inline bool smc_link_usable(struct smc_link *lnk) 492 { 493 if (lnk->state == SMC_LNK_UNUSED || lnk->state == SMC_LNK_INACTIVE) 494 return false; 495 return true; 496 } 497 498 /* 499 * Returns true if the specified link is ready to receive AND send RDMA 500 * messages. 501 * 502 * For the client side in first contact, the underlying QP may still in 503 * RESET or RTR when the link state is ACTIVATING, checks in smc_link_usable() 504 * is not strong enough. For those places that need to send any CDC or LLC 505 * messages, use smc_link_sendable(), otherwise, use smc_link_usable() instead 506 */ 507 static inline bool smc_link_sendable(struct smc_link *lnk) 508 { 509 return smc_link_usable(lnk) && 510 lnk->qp_attr.cur_qp_state == IB_QPS_RTS; 511 } 512 513 static inline bool smc_link_active(struct smc_link *lnk) 514 { 515 return lnk->state == SMC_LNK_ACTIVE; 516 } 517 518 static inline bool smc_link_shared_v2_rxbuf(struct smc_link *lnk) 519 { 520 return lnk->wr_rx_sge_cnt > 1; 521 } 522 523 static inline void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw) 524 { 525 sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x", 526 be16_to_cpu(((__be16 *)gid_raw)[0]), 527 be16_to_cpu(((__be16 *)gid_raw)[1]), 528 be16_to_cpu(((__be16 *)gid_raw)[2]), 529 be16_to_cpu(((__be16 *)gid_raw)[3]), 530 be16_to_cpu(((__be16 *)gid_raw)[4]), 531 be16_to_cpu(((__be16 *)gid_raw)[5]), 532 be16_to_cpu(((__be16 *)gid_raw)[6]), 533 be16_to_cpu(((__be16 *)gid_raw)[7])); 534 } 535 536 struct smc_pci_dev { 537 __u32 pci_fid; 538 __u16 pci_pchid; 539 __u16 pci_vendor; 540 __u16 pci_device; 541 __u8 pci_id[SMC_PCI_ID_STR_LEN]; 542 }; 543 544 static inline void smc_set_pci_values(struct pci_dev *pci_dev, 545 struct smc_pci_dev *smc_dev) 546 { 547 smc_dev->pci_vendor = pci_dev->vendor; 548 smc_dev->pci_device = pci_dev->device; 549 snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s", 550 pci_name(pci_dev)); 551 #if IS_ENABLED(CONFIG_S390) 552 { /* Set s390 specific PCI information */ 553 struct zpci_dev *zdev; 554 555 zdev = to_zpci(pci_dev); 556 smc_dev->pci_fid = zdev->fid; 557 smc_dev->pci_pchid = zdev->pchid; 558 } 559 #endif 560 } 561 562 struct smc_sock; 563 struct smc_clc_msg_accept_confirm; 564 565 void smc_lgr_cleanup_early(struct smc_link_group *lgr); 566 void smc_lgr_terminate_sched(struct smc_link_group *lgr); 567 void smc_lgr_hold(struct smc_link_group *lgr); 568 void smc_lgr_put(struct smc_link_group *lgr); 569 void smcr_port_add(struct smc_ib_device *smcibdev, u8 ibport); 570 void smcr_port_err(struct smc_ib_device *smcibdev, u8 ibport); 571 void smc_smcd_terminate(struct smcd_dev *dev, struct smcd_gid *peer_gid, 572 unsigned short vlan); 573 void smc_smcd_terminate_all(struct smcd_dev *dev); 574 void smc_smcr_terminate_all(struct smc_ib_device *smcibdev); 575 int smc_buf_create(struct smc_sock *smc, bool is_smcd); 576 int smcd_buf_attach(struct smc_sock *smc); 577 int smc_uncompress_bufsize(u8 compressed); 578 int smc_rmb_rtoken_handling(struct smc_connection *conn, struct smc_link *link, 579 struct smc_clc_msg_accept_confirm *clc); 580 int smc_rtoken_add(struct smc_link *lnk, __be64 nw_vaddr, __be32 nw_rkey); 581 int smc_rtoken_delete(struct smc_link *lnk, __be32 nw_rkey); 582 void smc_rtoken_set(struct smc_link_group *lgr, int link_idx, int link_idx_new, 583 __be32 nw_rkey_known, __be64 nw_vaddr, __be32 nw_rkey); 584 void smc_rtoken_set2(struct smc_link_group *lgr, int rtok_idx, int link_id, 585 __be64 nw_vaddr, __be32 nw_rkey); 586 void smc_sndbuf_sync_sg_for_device(struct smc_connection *conn); 587 void smc_rmb_sync_sg_for_cpu(struct smc_connection *conn); 588 int smc_vlan_by_tcpsk(struct socket *clcsock, struct smc_init_info *ini); 589 590 void smc_conn_free(struct smc_connection *conn); 591 int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini); 592 int smc_core_init(void); 593 void smc_core_exit(void); 594 595 int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk, 596 u8 link_idx, struct smc_init_info *ini); 597 void smcr_link_clear(struct smc_link *lnk, bool log); 598 void smcr_link_hold(struct smc_link *lnk); 599 void smcr_link_put(struct smc_link *lnk); 600 void smc_switch_link_and_count(struct smc_connection *conn, 601 struct smc_link *to_lnk); 602 int smcr_buf_map_lgr(struct smc_link *lnk); 603 int smcr_buf_reg_lgr(struct smc_link *lnk); 604 void smcr_lgr_set_type(struct smc_link_group *lgr, enum smc_lgr_type new_type); 605 void smcr_lgr_set_type_asym(struct smc_link_group *lgr, 606 enum smc_lgr_type new_type, int asym_lnk_idx); 607 int smcr_link_reg_buf(struct smc_link *link, struct smc_buf_desc *rmb_desc); 608 struct smc_link *smc_switch_conns(struct smc_link_group *lgr, 609 struct smc_link *from_lnk, bool is_dev_err); 610 void smcr_link_down_cond(struct smc_link *lnk); 611 void smcr_link_down_cond_sched(struct smc_link *lnk); 612 int smc_nl_get_sys_info(struct sk_buff *skb, struct netlink_callback *cb); 613 int smcr_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); 614 int smcr_nl_get_link(struct sk_buff *skb, struct netlink_callback *cb); 615 int smcd_nl_get_lgr(struct sk_buff *skb, struct netlink_callback *cb); 616 617 static inline struct smc_link_group *smc_get_lgr(struct smc_link *link) 618 { 619 return link->lgr; 620 } 621 #endif 622