net/smc/smc_core.h

   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