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