1 #ifndef _SDP_H_ 2 #define _SDP_H_ 3 4 #include "opt_ddb.h" 5 #include "opt_inet.h" 6 #include "opt_ofed.h" 7 8 #include <sys/param.h> 9 #include <sys/systm.h> 10 #include <sys/malloc.h> 11 #include <sys/kernel.h> 12 #include <sys/sysctl.h> 13 #include <sys/mbuf.h> 14 #include <sys/lock.h> 15 #include <sys/rwlock.h> 16 #include <sys/socket.h> 17 #include <sys/socketvar.h> 18 #include <sys/protosw.h> 19 #include <sys/proc.h> 20 #include <sys/jail.h> 21 #include <sys/domain.h> 22 23 #ifdef DDB 24 #include <ddb/ddb.h> 25 #endif 26 27 #include <net/if.h> 28 #include <net/route.h> 29 #include <net/vnet.h> 30 31 #include <netinet/in.h> 32 #include <netinet/in_systm.h> 33 #include <netinet/in_var.h> 34 #include <netinet/in_pcb.h> 35 #include <netinet/tcp.h> 36 #include <netinet/tcp_fsm.h> 37 #include <netinet/tcp_timer.h> 38 #include <netinet/tcp_var.h> 39 40 #include <linux/device.h> 41 #include <linux/err.h> 42 #include <linux/sched.h> 43 #include <linux/workqueue.h> 44 #include <linux/wait.h> 45 #include <linux/module.h> 46 #include <linux/moduleparam.h> 47 #include <linux/pci.h> 48 49 #include <rdma/ib_verbs.h> 50 #include <rdma/rdma_cm.h> 51 #include <rdma/ib_cm.h> 52 #include <rdma/sdp_socket.h> 53 #include <rdma/ib_fmr_pool.h> 54 55 #ifdef SDP_DEBUG 56 #define CONFIG_INFINIBAND_SDP_DEBUG 57 #endif 58 59 #include "sdp_dbg.h" 60 61 #undef LIST_HEAD 62 /* From sys/queue.h */ 63 #define LIST_HEAD(name, type) \ 64 struct name { \ 65 struct type *lh_first; /* first element */ \ 66 } 67 68 /* Interval between sucessive polls in the Tx routine when polling is used 69 instead of interrupts (in per-core Tx rings) - should be power of 2 */ 70 #define SDP_TX_POLL_MODER 16 71 #define SDP_TX_POLL_TIMEOUT (HZ / 20) 72 #define SDP_NAGLE_TIMEOUT (HZ / 10) 73 74 #define SDP_SRCAVAIL_CANCEL_TIMEOUT (HZ * 5) 75 #define SDP_SRCAVAIL_ADV_TIMEOUT (1 * HZ) 76 #define SDP_SRCAVAIL_PAYLOAD_LEN 1 77 78 #define SDP_RESOLVE_TIMEOUT 1000 79 #define SDP_ROUTE_TIMEOUT 1000 80 #define SDP_RETRY_COUNT 5 81 #define SDP_KEEPALIVE_TIME (120 * 60 * HZ) 82 #define SDP_FIN_WAIT_TIMEOUT (60 * HZ) /* like TCP_FIN_TIMEOUT */ 83 84 #define SDP_TX_SIZE 0x40 85 #define SDP_RX_SIZE 0x40 86 87 #define SDP_FMR_SIZE (MIN(0x1000, PAGE_SIZE) / sizeof(u64)) 88 #define SDP_FMR_POOL_SIZE 1024 89 #define SDP_FMR_DIRTY_SIZE ( SDP_FMR_POOL_SIZE / 4 ) 90 91 #define SDP_MAX_RDMA_READ_LEN (PAGE_SIZE * (SDP_FMR_SIZE - 2)) 92 93 /* mb inlined data len - rest will be rx'ed into frags */ 94 #define SDP_HEAD_SIZE (sizeof(struct sdp_bsdh)) 95 96 /* limit tx payload len, if the sink supports bigger buffers than the source 97 * can handle. 98 * or rx fragment size (limited by sge->length size) */ 99 #define SDP_MAX_PACKET (1 << 16) 100 #define SDP_MAX_PAYLOAD (SDP_MAX_PACKET - SDP_HEAD_SIZE) 101 102 #define SDP_MAX_RECV_SGES (SDP_MAX_PACKET / MCLBYTES) 103 #define SDP_MAX_SEND_SGES (SDP_MAX_PACKET / MCLBYTES) + 2 104 105 #define SDP_NUM_WC 4 106 107 #define SDP_DEF_ZCOPY_THRESH 64*1024 108 #define SDP_MIN_ZCOPY_THRESH PAGE_SIZE 109 #define SDP_MAX_ZCOPY_THRESH 1048576 110 111 #define SDP_OP_RECV 0x800000000LL 112 #define SDP_OP_SEND 0x400000000LL 113 #define SDP_OP_RDMA 0x200000000LL 114 #define SDP_OP_NOP 0x100000000LL 115 116 /* how long (in jiffies) to block sender till tx completion*/ 117 #define SDP_BZCOPY_POLL_TIMEOUT (HZ / 10) 118 119 #define SDP_AUTO_CONF 0xffff 120 #define AUTO_MOD_DELAY (HZ / 4) 121 122 struct sdp_mb_cb { 123 __u32 seq; /* Starting sequence number */ 124 struct bzcopy_state *bz; 125 struct rx_srcavail_state *rx_sa; 126 struct tx_srcavail_state *tx_sa; 127 }; 128 129 #define M_PUSH M_PROTO1 /* Do a 'push'. */ 130 #define M_URG M_PROTO2 /* Mark as urgent (oob). */ 131 132 #define SDP_SKB_CB(__mb) ((struct sdp_mb_cb *)&((__mb)->cb[0])) 133 #define BZCOPY_STATE(mb) (SDP_SKB_CB(mb)->bz) 134 #define RX_SRCAVAIL_STATE(mb) (SDP_SKB_CB(mb)->rx_sa) 135 #define TX_SRCAVAIL_STATE(mb) (SDP_SKB_CB(mb)->tx_sa) 136 137 #ifndef MIN 138 #define MIN(a, b) (a < b ? a : b) 139 #endif 140 141 #define ring_head(ring) (atomic_read(&(ring).head)) 142 #define ring_tail(ring) (atomic_read(&(ring).tail)) 143 #define ring_posted(ring) (ring_head(ring) - ring_tail(ring)) 144 145 #define rx_ring_posted(ssk) ring_posted(ssk->rx_ring) 146 #ifdef SDP_ZCOPY 147 #define tx_ring_posted(ssk) (ring_posted(ssk->tx_ring) + \ 148 (ssk->tx_ring.rdma_inflight ? ssk->tx_ring.rdma_inflight->busy : 0)) 149 #else 150 #define tx_ring_posted(ssk) ring_posted(ssk->tx_ring) 151 #endif 152 153 extern int sdp_zcopy_thresh; 154 extern int rcvbuf_initial_size; 155 extern struct workqueue_struct *rx_comp_wq; 156 extern struct ib_client sdp_client; 157 158 enum sdp_mid { 159 SDP_MID_HELLO = 0x0, 160 SDP_MID_HELLO_ACK = 0x1, 161 SDP_MID_DISCONN = 0x2, 162 SDP_MID_ABORT = 0x3, 163 SDP_MID_SENDSM = 0x4, 164 SDP_MID_RDMARDCOMPL = 0x6, 165 SDP_MID_SRCAVAIL_CANCEL = 0x8, 166 SDP_MID_CHRCVBUF = 0xB, 167 SDP_MID_CHRCVBUF_ACK = 0xC, 168 SDP_MID_SINKAVAIL = 0xFD, 169 SDP_MID_SRCAVAIL = 0xFE, 170 SDP_MID_DATA = 0xFF, 171 }; 172 173 enum sdp_flags { 174 SDP_OOB_PRES = 1 << 0, 175 SDP_OOB_PEND = 1 << 1, 176 }; 177 178 enum { 179 SDP_MIN_TX_CREDITS = 2 180 }; 181 182 enum { 183 SDP_ERR_ERROR = -4, 184 SDP_ERR_FAULT = -3, 185 SDP_NEW_SEG = -2, 186 SDP_DO_WAIT_MEM = -1 187 }; 188 189 struct sdp_bsdh { 190 u8 mid; 191 u8 flags; 192 __u16 bufs; 193 __u32 len; 194 __u32 mseq; 195 __u32 mseq_ack; 196 } __attribute__((__packed__)); 197 198 union cma_ip_addr { 199 struct in6_addr ip6; 200 struct { 201 __u32 pad[3]; 202 __u32 addr; 203 } ip4; 204 } __attribute__((__packed__)); 205 206 /* TODO: too much? Can I avoid having the src/dst and port here? */ 207 struct sdp_hh { 208 struct sdp_bsdh bsdh; 209 u8 majv_minv; 210 u8 ipv_cap; 211 u8 rsvd1; 212 u8 max_adverts; 213 __u32 desremrcvsz; 214 __u32 localrcvsz; 215 __u16 port; 216 __u16 rsvd2; 217 union cma_ip_addr src_addr; 218 union cma_ip_addr dst_addr; 219 u8 rsvd3[IB_CM_REQ_PRIVATE_DATA_SIZE - sizeof(struct sdp_bsdh) - 48]; 220 } __attribute__((__packed__)); 221 222 struct sdp_hah { 223 struct sdp_bsdh bsdh; 224 u8 majv_minv; 225 u8 ipv_cap; 226 u8 rsvd1; 227 u8 ext_max_adverts; 228 __u32 actrcvsz; 229 u8 rsvd2[IB_CM_REP_PRIVATE_DATA_SIZE - sizeof(struct sdp_bsdh) - 8]; 230 } __attribute__((__packed__)); 231 232 struct sdp_rrch { 233 __u32 len; 234 } __attribute__((__packed__)); 235 236 struct sdp_srcah { 237 __u32 len; 238 __u32 rkey; 239 __u64 vaddr; 240 } __attribute__((__packed__)); 241 242 struct sdp_buf { 243 struct mbuf *mb; 244 u64 mapping[SDP_MAX_SEND_SGES]; 245 } __attribute__((__packed__)); 246 247 struct sdp_chrecvbuf { 248 u32 size; 249 } __attribute__((__packed__)); 250 251 /* Context used for synchronous zero copy bcopy (BZCOPY) */ 252 struct bzcopy_state { 253 unsigned char __user *u_base; 254 int u_len; 255 int left; 256 int page_cnt; 257 int cur_page; 258 int cur_offset; 259 int busy; 260 struct sdp_sock *ssk; 261 struct page **pages; 262 }; 263 264 enum rx_sa_flag { 265 RX_SA_ABORTED = 2, 266 }; 267 268 enum tx_sa_flag { 269 TX_SA_SENDSM = 0x01, 270 TX_SA_CROSS_SEND = 0x02, 271 TX_SA_INTRRUPTED = 0x04, 272 TX_SA_TIMEDOUT = 0x08, 273 TX_SA_ERROR = 0x10, 274 }; 275 276 struct rx_srcavail_state { 277 /* Advertised buffer stuff */ 278 u32 mseq; 279 u32 used; 280 u32 reported; 281 u32 len; 282 u32 rkey; 283 u64 vaddr; 284 285 /* Dest buff info */ 286 struct ib_umem *umem; 287 struct ib_pool_fmr *fmr; 288 289 /* Utility */ 290 u8 busy; 291 enum rx_sa_flag flags; 292 }; 293 294 struct tx_srcavail_state { 295 /* Data below 'busy' will be reset */ 296 u8 busy; 297 298 struct ib_umem *umem; 299 struct ib_pool_fmr *fmr; 300 301 u32 bytes_sent; 302 u32 bytes_acked; 303 304 enum tx_sa_flag abort_flags; 305 u8 posted; 306 307 u32 mseq; 308 }; 309 310 struct sdp_tx_ring { 311 #ifdef SDP_ZCOPY 312 struct rx_srcavail_state *rdma_inflight; 313 #endif 314 struct sdp_buf *buffer; 315 atomic_t head; 316 atomic_t tail; 317 struct ib_cq *cq; 318 319 atomic_t credits; 320 #define tx_credits(ssk) (atomic_read(&ssk->tx_ring.credits)) 321 322 struct callout timer; 323 u16 poll_cnt; 324 }; 325 326 struct sdp_rx_ring { 327 struct sdp_buf *buffer; 328 atomic_t head; 329 atomic_t tail; 330 struct ib_cq *cq; 331 332 int destroyed; 333 struct rwlock destroyed_lock; 334 }; 335 336 struct sdp_device { 337 struct ib_pd *pd; 338 struct ib_mr *mr; 339 struct ib_fmr_pool *fmr_pool; 340 }; 341 342 struct sdp_moderation { 343 unsigned long last_moder_packets; 344 unsigned long last_moder_tx_packets; 345 unsigned long last_moder_bytes; 346 unsigned long last_moder_jiffies; 347 int last_moder_time; 348 u16 rx_usecs; 349 u16 rx_frames; 350 u16 tx_usecs; 351 u32 pkt_rate_low; 352 u16 rx_usecs_low; 353 u32 pkt_rate_high; 354 u16 rx_usecs_high; 355 u16 sample_interval; 356 u16 adaptive_rx_coal; 357 u32 msg_enable; 358 359 int moder_cnt; 360 int moder_time; 361 }; 362 363 /* These are flags fields. */ 364 #define SDP_TIMEWAIT 0x0001 /* In ssk timewait state. */ 365 #define SDP_DROPPED 0x0002 /* Socket has been dropped. */ 366 #define SDP_SOCKREF 0x0004 /* Holding a sockref for close. */ 367 #define SDP_NODELAY 0x0008 /* Disble nagle. */ 368 #define SDP_NEEDFIN 0x0010 /* Send a fin on the next tx. */ 369 #define SDP_DREQWAIT 0x0020 /* Waiting on DREQ. */ 370 #define SDP_DESTROY 0x0040 /* Being destroyed. */ 371 #define SDP_DISCON 0x0080 /* rdma_disconnect is owed. */ 372 373 /* These are oobflags */ 374 #define SDP_HADOOB 0x0001 /* Had OOB data. */ 375 #define SDP_HAVEOOB 0x0002 /* Have OOB data. */ 376 377 struct sdp_sock { 378 LIST_ENTRY(sdp_sock) list; 379 struct socket *socket; 380 struct rdma_cm_id *id; 381 struct ib_device *ib_device; 382 struct sdp_device *sdp_dev; 383 struct ib_qp *qp; 384 struct ucred *cred; 385 struct callout keep2msl; /* 2msl and keepalive timer. */ 386 struct callout nagle_timer; /* timeout waiting for ack */ 387 struct ib_ucontext context; 388 in_port_t lport; 389 in_addr_t laddr; 390 in_port_t fport; 391 in_addr_t faddr; 392 int flags; 393 int oobflags; /* protected by rx lock. */ 394 int state; 395 int softerror; 396 int recv_bytes; /* Bytes per recv. buf including header */ 397 int xmit_size_goal; 398 char iobc; 399 400 struct sdp_rx_ring rx_ring; 401 struct sdp_tx_ring tx_ring; 402 struct rwlock lock; 403 struct mbuf *rx_ctl_q; 404 struct mbuf *rx_ctl_tail; 405 406 int qp_active; /* XXX Flag. */ 407 int max_sge; 408 struct work_struct rx_comp_work; 409 #define rcv_nxt(ssk) atomic_read(&(ssk->rcv_nxt)) 410 atomic_t rcv_nxt; 411 412 /* SDP specific */ 413 atomic_t mseq_ack; 414 #define mseq_ack(ssk) (atomic_read(&ssk->mseq_ack)) 415 unsigned max_bufs; /* Initial buffers offered by other side */ 416 unsigned min_bufs; /* Low water mark to wake senders */ 417 418 unsigned long nagle_last_unacked; /* mseq of lastest unacked packet */ 419 420 atomic_t remote_credits; 421 #define remote_credits(ssk) (atomic_read(&ssk->remote_credits)) 422 int poll_cq; 423 424 /* SDP slow start */ 425 int recv_request_head; /* mark the rx_head when the resize request 426 was recieved */ 427 int recv_request; /* XXX flag if request to resize was recieved */ 428 429 unsigned long tx_packets; 430 unsigned long rx_packets; 431 unsigned long tx_bytes; 432 unsigned long rx_bytes; 433 struct sdp_moderation auto_mod; 434 struct task shutdown_task; 435 #ifdef SDP_ZCOPY 436 struct tx_srcavail_state *tx_sa; 437 struct rx_srcavail_state *rx_sa; 438 spinlock_t tx_sa_lock; 439 struct delayed_work srcavail_cancel_work; 440 int srcavail_cancel_mseq; 441 /* ZCOPY data: -1:use global; 0:disable zcopy; >0: zcopy threshold */ 442 int zcopy_thresh; 443 #endif 444 }; 445 446 #define sdp_sk(so) ((struct sdp_sock *)(so->so_pcb)) 447 448 #define SDP_RLOCK(ssk) rw_rlock(&(ssk)->lock) 449 #define SDP_WLOCK(ssk) rw_wlock(&(ssk)->lock) 450 #define SDP_RUNLOCK(ssk) rw_runlock(&(ssk)->lock) 451 #define SDP_WUNLOCK(ssk) rw_wunlock(&(ssk)->lock) 452 #define SDP_WLOCK_ASSERT(ssk) rw_assert(&(ssk)->lock, RA_WLOCKED) 453 #define SDP_RLOCK_ASSERT(ssk) rw_assert(&(ssk)->lock, RA_RLOCKED) 454 #define SDP_LOCK_ASSERT(ssk) rw_assert(&(ssk)->lock, RA_LOCKED) 455 456 static inline void tx_sa_reset(struct tx_srcavail_state *tx_sa) 457 { 458 memset((void *)&tx_sa->busy, 0, 459 sizeof(*tx_sa) - offsetof(typeof(*tx_sa), busy)); 460 } 461 462 static inline void rx_ring_unlock(struct sdp_rx_ring *rx_ring) 463 { 464 rw_runlock(&rx_ring->destroyed_lock); 465 } 466 467 static inline int rx_ring_trylock(struct sdp_rx_ring *rx_ring) 468 { 469 rw_rlock(&rx_ring->destroyed_lock); 470 if (rx_ring->destroyed) { 471 rx_ring_unlock(rx_ring); 472 return 0; 473 } 474 return 1; 475 } 476 477 static inline void rx_ring_destroy_lock(struct sdp_rx_ring *rx_ring) 478 { 479 rw_wlock(&rx_ring->destroyed_lock); 480 rx_ring->destroyed = 1; 481 rw_wunlock(&rx_ring->destroyed_lock); 482 } 483 484 static inline void sdp_arm_rx_cq(struct sdp_sock *ssk) 485 { 486 sdp_prf(ssk->socket, NULL, "Arming RX cq"); 487 sdp_dbg_data(ssk->socket, "Arming RX cq\n"); 488 489 ib_req_notify_cq(ssk->rx_ring.cq, IB_CQ_NEXT_COMP); 490 } 491 492 static inline void sdp_arm_tx_cq(struct sdp_sock *ssk) 493 { 494 sdp_prf(ssk->socket, NULL, "Arming TX cq"); 495 sdp_dbg_data(ssk->socket, "Arming TX cq. credits: %d, posted: %d\n", 496 tx_credits(ssk), tx_ring_posted(ssk)); 497 498 ib_req_notify_cq(ssk->tx_ring.cq, IB_CQ_NEXT_COMP); 499 } 500 501 /* return the min of: 502 * - tx credits 503 * - free slots in tx_ring (not including SDP_MIN_TX_CREDITS 504 */ 505 static inline int tx_slots_free(struct sdp_sock *ssk) 506 { 507 int min_free; 508 509 min_free = MIN(tx_credits(ssk), 510 SDP_TX_SIZE - tx_ring_posted(ssk)); 511 if (min_free < SDP_MIN_TX_CREDITS) 512 return 0; 513 514 return min_free - SDP_MIN_TX_CREDITS; 515 }; 516 517 /* utilities */ 518 static inline char *mid2str(int mid) 519 { 520 #define ENUM2STR(e) [e] = #e 521 static char *mid2str[] = { 522 ENUM2STR(SDP_MID_HELLO), 523 ENUM2STR(SDP_MID_HELLO_ACK), 524 ENUM2STR(SDP_MID_ABORT), 525 ENUM2STR(SDP_MID_DISCONN), 526 ENUM2STR(SDP_MID_SENDSM), 527 ENUM2STR(SDP_MID_RDMARDCOMPL), 528 ENUM2STR(SDP_MID_SRCAVAIL_CANCEL), 529 ENUM2STR(SDP_MID_CHRCVBUF), 530 ENUM2STR(SDP_MID_CHRCVBUF_ACK), 531 ENUM2STR(SDP_MID_DATA), 532 ENUM2STR(SDP_MID_SRCAVAIL), 533 ENUM2STR(SDP_MID_SINKAVAIL), 534 }; 535 536 if (mid >= ARRAY_SIZE(mid2str)) 537 return NULL; 538 539 return mid2str[mid]; 540 } 541 542 static inline struct mbuf * 543 sdp_alloc_mb(struct socket *sk, u8 mid, int size, int wait) 544 { 545 struct sdp_bsdh *h; 546 struct mbuf *mb; 547 548 MGETHDR(mb, wait, MT_DATA); 549 if (mb == NULL) 550 return (NULL); 551 mb->m_pkthdr.len = mb->m_len = sizeof(struct sdp_bsdh); 552 h = mtod(mb, struct sdp_bsdh *); 553 h->mid = mid; 554 555 return mb; 556 } 557 static inline struct mbuf * 558 sdp_alloc_mb_data(struct socket *sk, int wait) 559 { 560 return sdp_alloc_mb(sk, SDP_MID_DATA, 0, wait); 561 } 562 563 static inline struct mbuf * 564 sdp_alloc_mb_disconnect(struct socket *sk, int wait) 565 { 566 return sdp_alloc_mb(sk, SDP_MID_DISCONN, 0, wait); 567 } 568 569 static inline void * 570 mb_put(struct mbuf *mb, int len) 571 { 572 uint8_t *data; 573 574 data = mb->m_data; 575 data += mb->m_len; 576 mb->m_len += len; 577 return (void *)data; 578 } 579 580 static inline struct mbuf * 581 sdp_alloc_mb_chrcvbuf_ack(struct socket *sk, int size, int wait) 582 { 583 struct mbuf *mb; 584 struct sdp_chrecvbuf *resp_size; 585 586 mb = sdp_alloc_mb(sk, SDP_MID_CHRCVBUF_ACK, sizeof(*resp_size), wait); 587 if (mb == NULL) 588 return (NULL); 589 resp_size = (struct sdp_chrecvbuf *)mb_put(mb, sizeof *resp_size); 590 resp_size->size = htonl(size); 591 592 return mb; 593 } 594 595 static inline struct mbuf * 596 sdp_alloc_mb_srcavail(struct socket *sk, u32 len, u32 rkey, u64 vaddr, int wait) 597 { 598 struct mbuf *mb; 599 struct sdp_srcah *srcah; 600 601 mb = sdp_alloc_mb(sk, SDP_MID_SRCAVAIL, sizeof(*srcah), wait); 602 if (mb == NULL) 603 return (NULL); 604 srcah = (struct sdp_srcah *)mb_put(mb, sizeof(*srcah)); 605 srcah->len = htonl(len); 606 srcah->rkey = htonl(rkey); 607 srcah->vaddr = cpu_to_be64(vaddr); 608 609 return mb; 610 } 611 612 static inline struct mbuf * 613 sdp_alloc_mb_srcavail_cancel(struct socket *sk, int wait) 614 { 615 return sdp_alloc_mb(sk, SDP_MID_SRCAVAIL_CANCEL, 0, wait); 616 } 617 618 static inline struct mbuf * 619 sdp_alloc_mb_rdmardcompl(struct socket *sk, u32 len, int wait) 620 { 621 struct mbuf *mb; 622 struct sdp_rrch *rrch; 623 624 mb = sdp_alloc_mb(sk, SDP_MID_RDMARDCOMPL, sizeof(*rrch), wait); 625 if (mb == NULL) 626 return (NULL); 627 rrch = (struct sdp_rrch *)mb_put(mb, sizeof(*rrch)); 628 rrch->len = htonl(len); 629 630 return mb; 631 } 632 633 static inline struct mbuf * 634 sdp_alloc_mb_sendsm(struct socket *sk, int wait) 635 { 636 return sdp_alloc_mb(sk, SDP_MID_SENDSM, 0, wait); 637 } 638 static inline int sdp_tx_ring_slots_left(struct sdp_sock *ssk) 639 { 640 return SDP_TX_SIZE - tx_ring_posted(ssk); 641 } 642 643 static inline int credit_update_needed(struct sdp_sock *ssk) 644 { 645 int c; 646 647 c = remote_credits(ssk); 648 if (likely(c > SDP_MIN_TX_CREDITS)) 649 c += c/2; 650 return unlikely(c < rx_ring_posted(ssk)) && 651 likely(tx_credits(ssk) > 0) && 652 likely(sdp_tx_ring_slots_left(ssk)); 653 } 654 655 656 #define SDPSTATS_COUNTER_INC(stat) 657 #define SDPSTATS_COUNTER_ADD(stat, val) 658 #define SDPSTATS_COUNTER_MID_INC(stat, mid) 659 #define SDPSTATS_HIST_LINEAR(stat, size) 660 #define SDPSTATS_HIST(stat, size) 661 662 static inline void 663 sdp_cleanup_sdp_buf(struct sdp_sock *ssk, struct sdp_buf *sbuf, 664 enum dma_data_direction dir) 665 { 666 struct ib_device *dev; 667 struct mbuf *mb; 668 int i; 669 670 dev = ssk->ib_device; 671 for (i = 0, mb = sbuf->mb; mb != NULL; mb = mb->m_next, i++) 672 ib_dma_unmap_single(dev, sbuf->mapping[i], mb->m_len, dir); 673 } 674 675 /* sdp_main.c */ 676 void sdp_set_default_moderation(struct sdp_sock *ssk); 677 void sdp_start_keepalive_timer(struct socket *sk); 678 void sdp_urg(struct sdp_sock *ssk, struct mbuf *mb); 679 void sdp_cancel_dreq_wait_timeout(struct sdp_sock *ssk); 680 void sdp_abort(struct socket *sk); 681 struct sdp_sock *sdp_notify(struct sdp_sock *ssk, int error); 682 683 684 /* sdp_cma.c */ 685 int sdp_cma_handler(struct rdma_cm_id *, struct rdma_cm_event *); 686 687 /* sdp_tx.c */ 688 int sdp_tx_ring_create(struct sdp_sock *ssk, struct ib_device *device); 689 void sdp_tx_ring_destroy(struct sdp_sock *ssk); 690 int sdp_xmit_poll(struct sdp_sock *ssk, int force); 691 void sdp_post_send(struct sdp_sock *ssk, struct mbuf *mb); 692 void sdp_post_sends(struct sdp_sock *ssk, int wait); 693 void sdp_post_keepalive(struct sdp_sock *ssk); 694 695 /* sdp_rx.c */ 696 void sdp_rx_ring_init(struct sdp_sock *ssk); 697 int sdp_rx_ring_create(struct sdp_sock *ssk, struct ib_device *device); 698 void sdp_rx_ring_destroy(struct sdp_sock *ssk); 699 int sdp_resize_buffers(struct sdp_sock *ssk, u32 new_size); 700 int sdp_init_buffers(struct sdp_sock *ssk, u32 new_size); 701 void sdp_do_posts(struct sdp_sock *ssk); 702 void sdp_rx_comp_full(struct sdp_sock *ssk); 703 704 /* sdp_zcopy.c */ 705 int sdp_sendmsg_zcopy(struct kiocb *iocb, struct socket *sk, struct iovec *iov); 706 int sdp_handle_srcavail(struct sdp_sock *ssk, struct sdp_srcah *srcah); 707 void sdp_handle_sendsm(struct sdp_sock *ssk, u32 mseq_ack); 708 void sdp_handle_rdma_read_compl(struct sdp_sock *ssk, u32 mseq_ack, 709 u32 bytes_completed); 710 int sdp_handle_rdma_read_cqe(struct sdp_sock *ssk); 711 int sdp_rdma_to_iovec(struct socket *sk, struct iovec *iov, struct mbuf *mb, 712 unsigned long *used); 713 int sdp_post_rdma_rd_compl(struct sdp_sock *ssk, 714 struct rx_srcavail_state *rx_sa); 715 int sdp_post_sendsm(struct socket *sk); 716 void srcavail_cancel_timeout(struct work_struct *work); 717 void sdp_abort_srcavail(struct socket *sk); 718 void sdp_abort_rdma_read(struct socket *sk); 719 int sdp_process_rx(struct sdp_sock *ssk); 720 721 #endif 722