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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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36 * lnet/klnds/o2iblnd/o2iblnd.h
38 * Author: Eric Barton <eric@bartonsoftware.com>
41 #include <linux/version.h>
42 #include <linux/module.h>
43 #include <linux/kernel.h>
45 #include <linux/string.h>
46 #include <linux/stat.h>
47 #include <linux/errno.h>
48 #include <linux/unistd.h>
49 #include <linux/uio.h>
51 #include <asm/uaccess.h>
54 #include <linux/init.h>
56 #include <linux/file.h>
57 #include <linux/stat.h>
58 #include <linux/list.h>
59 #include <linux/kmod.h>
60 #include <linux/sysctl.h>
61 #include <linux/pci.h>
62 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,32)
63 #include <linux/pci-dma.h>
66 #ifdef HAVE_COMPAT_RDMA
67 #include <linux/compat-2.6.h>
73 #include <rdma/rdma_cm.h>
74 #include <rdma/ib_cm.h>
75 #include <rdma/ib_verbs.h>
76 #include <rdma/ib_fmr_pool.h>
78 #define DEBUG_SUBSYSTEM S_LND
80 #include <libcfs/libcfs.h>
81 #include <lnet/lnet.h>
82 #include <lnet/lib-lnet.h>
84 #define IBLND_PEER_HASH_SIZE 101 /* # peer lists */
85 /* # scheduler loops before reschedule */
86 #define IBLND_RESCHED 100
88 #define IBLND_N_SCHED 2
89 #define IBLND_N_SCHED_HIGH 4
93 int *kib_dev_failover; /* HCA failover */
94 unsigned int *kib_service; /* IB service number */
95 int *kib_min_reconnect_interval; /* first failed connection retry... */
96 int *kib_max_reconnect_interval; /* ...exponentially increasing to this */
97 int *kib_cksum; /* checksum kib_msg_t? */
98 int *kib_timeout; /* comms timeout (seconds) */
99 int *kib_keepalive; /* keepalive timeout (seconds) */
100 int *kib_ntx; /* # tx descs */
101 int *kib_credits; /* # concurrent sends */
102 int *kib_peertxcredits; /* # concurrent sends to 1 peer */
103 int *kib_peerrtrcredits; /* # per-peer router buffer credits */
104 int *kib_peercredits_hiw; /* # when eagerly to return credits */
105 int *kib_peertimeout; /* seconds to consider peer dead */
106 char **kib_default_ipif; /* default IPoIB interface */
107 int *kib_retry_count;
108 int *kib_rnr_retry_count;
109 int *kib_concurrent_sends; /* send work queue sizing */
110 int *kib_ib_mtu; /* IB MTU */
111 int *kib_map_on_demand; /* map-on-demand if RD has more fragments
112 * than this value, 0 disable map-on-demand */
113 int *kib_pmr_pool_size; /* # physical MR in pool */
114 int *kib_fmr_pool_size; /* # FMRs in pool */
115 int *kib_fmr_flush_trigger; /* When to trigger FMR flush */
116 int *kib_fmr_cache; /* enable FMR pool cache? */
117 #if defined(CONFIG_SYSCTL) && !CFS_SYSFS_MODULE_PARM
118 struct ctl_table_header *kib_sysctl; /* sysctl interface */
120 int *kib_require_priv_port;/* accept only privileged ports */
121 int *kib_use_priv_port; /* use privileged port for active connect */
122 /* # threads on each CPT */
126 extern kib_tunables_t kiblnd_tunables;
128 #define IBLND_MSG_QUEUE_SIZE_V1 8 /* V1 only : # messages/RDMAs in-flight */
129 #define IBLND_CREDIT_HIGHWATER_V1 7 /* V1 only : when eagerly to return credits */
131 #define IBLND_CREDITS_DEFAULT 8 /* default # of peer credits */
132 #define IBLND_CREDITS_MAX ((typeof(((kib_msg_t*) 0)->ibm_credits)) - 1) /* Max # of peer credits */
134 #define IBLND_MSG_QUEUE_SIZE(v) ((v) == IBLND_MSG_VERSION_1 ? \
135 IBLND_MSG_QUEUE_SIZE_V1 : \
136 *kiblnd_tunables.kib_peertxcredits) /* # messages/RDMAs in-flight */
137 #define IBLND_CREDITS_HIGHWATER(v) ((v) == IBLND_MSG_VERSION_1 ? \
138 IBLND_CREDIT_HIGHWATER_V1 : \
139 *kiblnd_tunables.kib_peercredits_hiw) /* when eagerly to return credits */
141 #ifdef HAVE_RDMA_CREATE_ID_4ARG
142 #define kiblnd_rdma_create_id(cb, dev, ps, qpt) rdma_create_id(cb, dev, ps, qpt)
144 #define kiblnd_rdma_create_id(cb, dev, ps, qpt) rdma_create_id(cb, dev, ps)
148 kiblnd_concurrent_sends_v1(void)
150 if (*kiblnd_tunables.kib_concurrent_sends > IBLND_MSG_QUEUE_SIZE_V1 * 2)
151 return IBLND_MSG_QUEUE_SIZE_V1 * 2;
153 if (*kiblnd_tunables.kib_concurrent_sends < IBLND_MSG_QUEUE_SIZE_V1 / 2)
154 return IBLND_MSG_QUEUE_SIZE_V1 / 2;
156 return *kiblnd_tunables.kib_concurrent_sends;
159 #define IBLND_CONCURRENT_SENDS(v) ((v) == IBLND_MSG_VERSION_1 ? \
160 kiblnd_concurrent_sends_v1() : \
161 *kiblnd_tunables.kib_concurrent_sends)
162 /* 2 OOB shall suffice for 1 keepalive and 1 returning credits */
163 #define IBLND_OOB_CAPABLE(v) ((v) != IBLND_MSG_VERSION_1)
164 #define IBLND_OOB_MSGS(v) (IBLND_OOB_CAPABLE(v) ? 2 : 0)
166 #define IBLND_MSG_SIZE (4<<10) /* max size of queued messages (inc hdr) */
167 #define IBLND_MAX_RDMA_FRAGS LNET_MAX_IOV /* max # of fragments supported */
168 #define IBLND_CFG_RDMA_FRAGS (*kiblnd_tunables.kib_map_on_demand != 0 ? \
169 *kiblnd_tunables.kib_map_on_demand : \
170 IBLND_MAX_RDMA_FRAGS) /* max # of fragments configured by user */
171 #define IBLND_RDMA_FRAGS(v) ((v) == IBLND_MSG_VERSION_1 ? \
172 IBLND_MAX_RDMA_FRAGS : IBLND_CFG_RDMA_FRAGS)
174 /************************/
175 /* derived constants... */
176 /* Pools (shared by connections on each CPT) */
177 /* These pools can grow at runtime, so don't need give a very large value */
178 #define IBLND_TX_POOL 256
179 #define IBLND_PMR_POOL 256
180 #define IBLND_FMR_POOL 256
181 #define IBLND_FMR_POOL_FLUSH 192
183 /* TX messages (shared by all connections) */
184 #define IBLND_TX_MSGS() (*kiblnd_tunables.kib_ntx)
186 /* RX messages (per connection) */
187 #define IBLND_RX_MSGS(v) (IBLND_MSG_QUEUE_SIZE(v) * 2 + IBLND_OOB_MSGS(v))
188 #define IBLND_RX_MSG_BYTES(v) (IBLND_RX_MSGS(v) * IBLND_MSG_SIZE)
189 #define IBLND_RX_MSG_PAGES(v) ((IBLND_RX_MSG_BYTES(v) + PAGE_SIZE - 1) / PAGE_SIZE)
191 /* WRs and CQEs (per connection) */
192 #define IBLND_RECV_WRS(v) IBLND_RX_MSGS(v)
193 #define IBLND_SEND_WRS(v) ((IBLND_RDMA_FRAGS(v) + 1) * IBLND_CONCURRENT_SENDS(v))
194 #define IBLND_CQ_ENTRIES(v) (IBLND_RECV_WRS(v) + IBLND_SEND_WRS(v))
198 /* o2iblnd can run over aliased interface */
200 #define KIB_IFNAME_SIZE IFALIASZ
202 #define KIB_IFNAME_SIZE 256
207 struct list_head ibd_list; /* chain on kib_devs */
208 struct list_head ibd_fail_list; /* chain on kib_failed_devs */
209 __u32 ibd_ifip; /* IPoIB interface IP */
210 /** IPoIB interface name */
211 char ibd_ifname[KIB_IFNAME_SIZE];
212 int ibd_nnets; /* # nets extant */
214 cfs_time_t ibd_next_failover;
215 /* # failover failures */
216 int ibd_failed_failover;
217 /* failover in progress */
218 unsigned int ibd_failover;
219 /* IPoIB interface is a bonding master */
220 unsigned int ibd_can_failover;
221 struct list_head ibd_nets;
222 struct kib_hca_dev *ibd_hdev;
225 typedef struct kib_hca_dev
227 struct rdma_cm_id *ibh_cmid; /* listener cmid */
228 struct ib_device *ibh_ibdev; /* IB device */
229 int ibh_page_shift; /* page shift of current HCA */
230 int ibh_page_size; /* page size of current HCA */
231 __u64 ibh_page_mask; /* page mask of current HCA */
232 int ibh_mr_shift; /* bits shift of max MR size */
233 __u64 ibh_mr_size; /* size of MR */
234 int ibh_nmrs; /* # of global MRs */
235 struct ib_mr **ibh_mrs; /* global MR */
236 struct ib_pd *ibh_pd; /* PD */
237 kib_dev_t *ibh_dev; /* owner */
238 atomic_t ibh_ref; /* refcount */
241 /** # of seconds to keep pool alive */
242 #define IBLND_POOL_DEADLINE 300
243 /** # of seconds to retry if allocation failed */
244 #define IBLND_POOL_RETRY 1
248 int ibp_npages; /* # pages */
249 struct page *ibp_pages[0]; /* page array */
255 struct list_head pmr_list; /* chain node */
256 struct ib_phys_buf *pmr_ipb; /* physical buffer */
257 struct ib_mr *pmr_mr; /* IB MR */
258 struct kib_pmr_pool *pmr_pool; /* owner of this MR */
259 __u64 pmr_iova; /* Virtual I/O address */
260 int pmr_refcount; /* reference count */
266 typedef int (*kib_ps_pool_create_t)(struct kib_poolset *ps,
267 int inc, struct kib_pool **pp_po);
268 typedef void (*kib_ps_pool_destroy_t)(struct kib_pool *po);
269 typedef void (*kib_ps_node_init_t)(struct kib_pool *po, struct list_head *node);
270 typedef void (*kib_ps_node_fini_t)(struct kib_pool *po, struct list_head *node);
274 #define IBLND_POOL_NAME_LEN 32
276 typedef struct kib_poolset
280 /* network it belongs to */
281 struct kib_net *ps_net;
283 char ps_name[IBLND_POOL_NAME_LEN];
285 struct list_head ps_pool_list;
286 /* failed pool list */
287 struct list_head ps_failed_pool_list;
288 /* time stamp for retry if failed to allocate */
289 cfs_time_t ps_next_retry;
290 /* is allocating new pool */
297 /* create a new pool */
298 kib_ps_pool_create_t ps_pool_create;
300 kib_ps_pool_destroy_t ps_pool_destroy;
301 /* initialize new allocated node */
302 kib_ps_node_init_t ps_node_init;
304 kib_ps_node_fini_t ps_node_fini;
307 typedef struct kib_pool
309 /* chain on pool list */
310 struct list_head po_list;
311 /* pre-allocated node */
312 struct list_head po_free_list;
313 /* pool_set of this pool */
314 kib_poolset_t *po_owner;
315 /* deadline of this pool */
316 cfs_time_t po_deadline;
317 /* # of elements in use */
319 /* pool is created on failed HCA */
321 /* # of pre-allocated elements */
326 kib_poolset_t tps_poolset; /* pool-set */
327 __u64 tps_next_tx_cookie; /* cookie of TX */
331 kib_pool_t tpo_pool; /* pool */
332 struct kib_hca_dev *tpo_hdev; /* device for this pool */
333 struct kib_tx *tpo_tx_descs; /* all the tx descriptors */
334 kib_pages_t *tpo_tx_pages; /* premapped tx msg pages */
338 kib_poolset_t pps_poolset; /* pool-set */
341 typedef struct kib_pmr_pool {
342 struct kib_hca_dev *ppo_hdev; /* device for this pool */
343 kib_pool_t ppo_pool; /* pool */
348 spinlock_t fps_lock; /* serialize */
349 struct kib_net *fps_net; /* IB network */
350 struct list_head fps_pool_list; /* FMR pool list */
351 struct list_head fps_failed_pool_list; /* FMR pool list */
352 __u64 fps_version; /* validity stamp */
353 int fps_cpt; /* CPT id */
355 int fps_flush_trigger;
356 /* is allocating new pool */
358 /* time stamp for retry if failed to allocate */
359 cfs_time_t fps_next_retry;
364 struct list_head fpo_list; /* chain on pool list */
365 struct kib_hca_dev *fpo_hdev; /* device for this pool */
366 kib_fmr_poolset_t *fpo_owner; /* owner of this pool */
367 struct ib_fmr_pool *fpo_fmr_pool; /* IB FMR pool */
368 cfs_time_t fpo_deadline; /* deadline of this pool */
369 int fpo_failed; /* fmr pool is failed */
370 int fpo_map_count; /* # of mapped FMR */
374 struct ib_pool_fmr *fmr_pfmr; /* IB pool fmr */
375 kib_fmr_pool_t *fmr_pool; /* pool of FMR */
378 typedef struct kib_net
380 /* chain on kib_dev_t::ibd_nets */
381 struct list_head ibn_list;
382 __u64 ibn_incarnation;/* my epoch */
383 int ibn_init; /* initialisation state */
384 int ibn_shutdown; /* shutting down? */
386 atomic_t ibn_npeers; /* # peers extant */
387 atomic_t ibn_nconns; /* # connections extant */
389 kib_tx_poolset_t **ibn_tx_ps; /* tx pool-set */
390 kib_fmr_poolset_t **ibn_fmr_ps; /* fmr pool-set */
391 kib_pmr_poolset_t **ibn_pmr_ps; /* pmr pool-set */
393 kib_dev_t *ibn_dev; /* underlying IB device */
396 #define KIB_THREAD_SHIFT 16
397 #define KIB_THREAD_ID(cpt, tid) ((cpt) << KIB_THREAD_SHIFT | (tid))
398 #define KIB_THREAD_CPT(id) ((id) >> KIB_THREAD_SHIFT)
399 #define KIB_THREAD_TID(id) ((id) & ((1UL << KIB_THREAD_SHIFT) - 1))
401 struct kib_sched_info {
404 /* schedulers sleep here */
405 wait_queue_head_t ibs_waitq;
406 /* conns to check for rx completions */
407 struct list_head ibs_conns;
408 /* number of scheduler threads */
410 /* max allowed scheduler threads */
411 int ibs_nthreads_max;
412 int ibs_cpt; /* CPT id */
417 int kib_init; /* initialisation state */
418 int kib_shutdown; /* shut down? */
419 struct list_head kib_devs; /* IB devices extant */
420 /* list head of failed devices */
421 struct list_head kib_failed_devs;
422 /* schedulers sleep here */
423 wait_queue_head_t kib_failover_waitq;
424 atomic_t kib_nthreads; /* # live threads */
425 /* stabilize net/dev/peer/conn ops */
426 rwlock_t kib_global_lock;
427 /* hash table of all my known peers */
428 struct list_head *kib_peers;
429 /* size of kib_peers */
430 int kib_peer_hash_size;
431 /* the connd task (serialisation assertions) */
433 /* connections to setup/teardown */
434 struct list_head kib_connd_conns;
435 /* connections with zero refcount */
436 struct list_head kib_connd_zombies;
437 /* connection daemon sleeps here */
438 wait_queue_head_t kib_connd_waitq;
439 spinlock_t kib_connd_lock; /* serialise */
440 struct ib_qp_attr kib_error_qpa; /* QP->ERROR */
441 /* percpt data for schedulers */
442 struct kib_sched_info **kib_scheds;
445 #define IBLND_INIT_NOTHING 0
446 #define IBLND_INIT_DATA 1
447 #define IBLND_INIT_ALL 2
449 /************************************************************************
450 * IB Wire message format.
451 * These are sent in sender's byte order (i.e. receiver flips).
454 typedef struct kib_connparams
456 __u16 ibcp_queue_depth;
457 __u16 ibcp_max_frags;
458 __u32 ibcp_max_msg_size;
459 } WIRE_ATTR kib_connparams_t;
463 lnet_hdr_t ibim_hdr; /* portals header */
464 char ibim_payload[0]; /* piggy-backed payload */
465 } WIRE_ATTR kib_immediate_msg_t;
469 __u32 rf_nob; /* # bytes this frag */
470 __u64 rf_addr; /* CAVEAT EMPTOR: misaligned!! */
471 } WIRE_ATTR kib_rdma_frag_t;
475 __u32 rd_key; /* local/remote key */
476 __u32 rd_nfrags; /* # fragments */
477 kib_rdma_frag_t rd_frags[0]; /* buffer frags */
478 } WIRE_ATTR kib_rdma_desc_t;
482 lnet_hdr_t ibprm_hdr; /* portals header */
483 __u64 ibprm_cookie; /* opaque completion cookie */
484 } WIRE_ATTR kib_putreq_msg_t;
488 __u64 ibpam_src_cookie; /* reflected completion cookie */
489 __u64 ibpam_dst_cookie; /* opaque completion cookie */
490 kib_rdma_desc_t ibpam_rd; /* sender's sink buffer */
491 } WIRE_ATTR kib_putack_msg_t;
495 lnet_hdr_t ibgm_hdr; /* portals header */
496 __u64 ibgm_cookie; /* opaque completion cookie */
497 kib_rdma_desc_t ibgm_rd; /* rdma descriptor */
498 } WIRE_ATTR kib_get_msg_t;
502 __u64 ibcm_cookie; /* opaque completion cookie */
503 __s32 ibcm_status; /* < 0 failure: >= 0 length */
504 } WIRE_ATTR kib_completion_msg_t;
508 /* First 2 fields fixed FOR ALL TIME */
509 __u32 ibm_magic; /* I'm an ibnal message */
510 __u16 ibm_version; /* this is my version number */
512 __u8 ibm_type; /* msg type */
513 __u8 ibm_credits; /* returned credits */
514 __u32 ibm_nob; /* # bytes in whole message */
515 __u32 ibm_cksum; /* checksum (0 == no checksum) */
516 __u64 ibm_srcnid; /* sender's NID */
517 __u64 ibm_srcstamp; /* sender's incarnation */
518 __u64 ibm_dstnid; /* destination's NID */
519 __u64 ibm_dststamp; /* destination's incarnation */
522 kib_connparams_t connparams;
523 kib_immediate_msg_t immediate;
524 kib_putreq_msg_t putreq;
525 kib_putack_msg_t putack;
527 kib_completion_msg_t completion;
529 } WIRE_ATTR kib_msg_t;
531 #define IBLND_MSG_MAGIC LNET_PROTO_IB_MAGIC /* unique magic */
533 #define IBLND_MSG_VERSION_1 0x11
534 #define IBLND_MSG_VERSION_2 0x12
535 #define IBLND_MSG_VERSION IBLND_MSG_VERSION_2
537 #define IBLND_MSG_CONNREQ 0xc0 /* connection request */
538 #define IBLND_MSG_CONNACK 0xc1 /* connection acknowledge */
539 #define IBLND_MSG_NOOP 0xd0 /* nothing (just credits) */
540 #define IBLND_MSG_IMMEDIATE 0xd1 /* immediate */
541 #define IBLND_MSG_PUT_REQ 0xd2 /* putreq (src->sink) */
542 #define IBLND_MSG_PUT_NAK 0xd3 /* completion (sink->src) */
543 #define IBLND_MSG_PUT_ACK 0xd4 /* putack (sink->src) */
544 #define IBLND_MSG_PUT_DONE 0xd5 /* completion (src->sink) */
545 #define IBLND_MSG_GET_REQ 0xd6 /* getreq (sink->src) */
546 #define IBLND_MSG_GET_DONE 0xd7 /* completion (src->sink: all OK) */
549 __u32 ibr_magic; /* sender's magic */
550 __u16 ibr_version; /* sender's version */
551 __u8 ibr_why; /* reject reason */
552 __u8 ibr_padding; /* padding */
553 __u64 ibr_incarnation; /* incarnation of peer */
554 kib_connparams_t ibr_cp; /* connection parameters */
555 } WIRE_ATTR kib_rej_t;
557 /* connection rejection reasons */
558 #define IBLND_REJECT_CONN_RACE 1 /* You lost connection race */
559 #define IBLND_REJECT_NO_RESOURCES 2 /* Out of memory/conns etc */
560 #define IBLND_REJECT_FATAL 3 /* Anything else */
562 #define IBLND_REJECT_CONN_UNCOMPAT 4 /* incompatible version peer */
563 #define IBLND_REJECT_CONN_STALE 5 /* stale peer */
565 #define IBLND_REJECT_RDMA_FRAGS 6 /* Fatal: peer's rdma frags can't match mine */
566 #define IBLND_REJECT_MSG_QUEUE_SIZE 7 /* Fatal: peer's msg queue size can't match mine */
568 /***********************************************************************/
570 typedef struct kib_rx /* receive message */
572 /* queue for attention */
573 struct list_head rx_list;
575 struct kib_conn *rx_conn;
576 /* # bytes received (-1 while posted) */
578 /* completion status */
579 enum ib_wc_status rx_status;
580 /* message buffer (host vaddr) */
582 /* message buffer (I/O addr) */
584 /* for dma_unmap_single() */
585 DECLARE_PCI_UNMAP_ADDR(rx_msgunmap);
586 /* receive work item... */
587 struct ib_recv_wr rx_wrq;
588 /* ...and its memory */
589 struct ib_sge rx_sge;
592 #define IBLND_POSTRX_DONT_POST 0 /* don't post */
593 #define IBLND_POSTRX_NO_CREDIT 1 /* post: no credits */
594 #define IBLND_POSTRX_PEER_CREDIT 2 /* post: give peer back 1 credit */
595 #define IBLND_POSTRX_RSRVD_CREDIT 3 /* post: give myself back 1 reserved credit */
597 typedef struct kib_tx /* transmit message */
599 /* queue on idle_txs ibc_tx_queue etc. */
600 struct list_head tx_list;
602 kib_tx_pool_t *tx_pool;
604 struct kib_conn *tx_conn;
605 /* # tx callbacks outstanding */
607 /* queued for sending */
609 /* waiting for peer */
611 /* LNET completion status */
613 /* completion deadline */
614 unsigned long tx_deadline;
615 /* completion cookie */
617 /* lnet msgs to finalize on completion */
618 lnet_msg_t *tx_lntmsg[2];
619 /* message buffer (host vaddr) */
621 /* message buffer (I/O addr) */
623 /* for dma_unmap_single() */
624 DECLARE_PCI_UNMAP_ADDR(tx_msgunmap);
625 /* # send work items */
627 /* send work items... */
628 struct ib_send_wr *tx_wrq;
629 /* ...and their memory */
630 struct ib_sge *tx_sge;
631 /* rdma descriptor */
632 kib_rdma_desc_t *tx_rd;
633 /* # entries in... */
635 /* dma_map_sg descriptor */
636 struct scatterlist *tx_frags;
637 /* rdma phys page addrs */
640 /* MR for physical buffer */
649 typedef struct kib_connvars
651 /* connection-in-progress variables */
655 typedef struct kib_conn
657 /* scheduler information */
658 struct kib_sched_info *ibc_sched;
660 struct kib_peer *ibc_peer;
662 kib_hca_dev_t *ibc_hdev;
663 /* stash on peer's conn list */
664 struct list_head ibc_list;
665 /* schedule for attention */
666 struct list_head ibc_sched_list;
667 /* version of connection */
669 /* which instance of the peer */
670 __u64 ibc_incarnation;
672 atomic_t ibc_refcount;
673 /* what's happening */
675 /* # uncompleted sends */
676 int ibc_nsends_posted;
677 /* # uncompleted NOOPs */
678 int ibc_noops_posted;
679 /* # credits I have */
681 /* # credits to return */
682 int ibc_outstanding_credits;
683 /* # ACK/DONE msg credits */
684 int ibc_reserved_credits;
685 /* set on comms error */
687 /* receive buffers owned */
688 unsigned int ibc_nrx:16;
689 /* scheduled for attention */
690 unsigned int ibc_scheduled:1;
691 /* CQ callback fired */
692 unsigned int ibc_ready:1;
693 /* time of last send */
694 unsigned long ibc_last_send;
695 /** link chain for kiblnd_check_conns only */
696 struct list_head ibc_connd_list;
697 /** rxs completed before ESTABLISHED */
698 struct list_head ibc_early_rxs;
699 /** IBLND_MSG_NOOPs for IBLND_MSG_VERSION_1 */
700 struct list_head ibc_tx_noops;
701 /* sends that need a credit */
702 struct list_head ibc_tx_queue;
703 /* sends that don't need a credit */
704 struct list_head ibc_tx_queue_nocred;
705 /* sends that need to reserve an ACK/DONE msg */
706 struct list_head ibc_tx_queue_rsrvd;
707 /* active tx awaiting completion */
708 struct list_head ibc_active_txs;
713 /* premapped rx msg pages */
714 kib_pages_t *ibc_rx_pages;
717 struct rdma_cm_id *ibc_cmid;
718 /* completion queue */
719 struct ib_cq *ibc_cq;
721 /* in-progress connection state */
722 kib_connvars_t *ibc_connvars;
725 #define IBLND_CONN_INIT 0 /* being initialised */
726 #define IBLND_CONN_ACTIVE_CONNECT 1 /* active sending req */
727 #define IBLND_CONN_PASSIVE_WAIT 2 /* passive waiting for rtu */
728 #define IBLND_CONN_ESTABLISHED 3 /* connection established */
729 #define IBLND_CONN_CLOSING 4 /* being closed */
730 #define IBLND_CONN_DISCONNECTED 5 /* disconnected */
732 typedef struct kib_peer
734 /* stash on global peer list */
735 struct list_head ibp_list;
736 /* who's on the other end(s) */
741 atomic_t ibp_refcount;
742 /* all active connections */
743 struct list_head ibp_conns;
744 /* msgs waiting for a conn */
745 struct list_head ibp_tx_queue;
746 /* version of peer */
748 /* incarnation of peer */
749 __u64 ibp_incarnation;
750 /* current active connection attempts */
752 /* current passive connection attempts */
754 /* errno on closing this peer */
756 /* when (in jiffies) I was last alive */
757 cfs_time_t ibp_last_alive;
760 extern kib_data_t kiblnd_data;
762 extern void kiblnd_hdev_destroy(kib_hca_dev_t *hdev);
765 kiblnd_hdev_addref_locked(kib_hca_dev_t *hdev)
767 LASSERT(atomic_read(&hdev->ibh_ref) > 0);
768 atomic_inc(&hdev->ibh_ref);
772 kiblnd_hdev_decref(kib_hca_dev_t *hdev)
774 LASSERT(atomic_read(&hdev->ibh_ref) > 0);
775 if (atomic_dec_and_test(&hdev->ibh_ref))
776 kiblnd_hdev_destroy(hdev);
780 kiblnd_dev_can_failover(kib_dev_t *dev)
782 if (!list_empty(&dev->ibd_fail_list)) /* already scheduled */
785 if (*kiblnd_tunables.kib_dev_failover == 0) /* disabled */
788 if (*kiblnd_tunables.kib_dev_failover > 1) /* force failover */
791 return dev->ibd_can_failover;
794 #define kiblnd_conn_addref(conn) \
796 CDEBUG(D_NET, "conn[%p] (%d)++\n", \
797 (conn), atomic_read(&(conn)->ibc_refcount)); \
798 atomic_inc(&(conn)->ibc_refcount); \
801 #define kiblnd_conn_decref(conn) \
803 unsigned long flags; \
805 CDEBUG(D_NET, "conn[%p] (%d)--\n", \
806 (conn), atomic_read(&(conn)->ibc_refcount)); \
807 LASSERT_ATOMIC_POS(&(conn)->ibc_refcount); \
808 if (atomic_dec_and_test(&(conn)->ibc_refcount)) { \
809 spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); \
810 list_add_tail(&(conn)->ibc_list, \
811 &kiblnd_data.kib_connd_zombies); \
812 wake_up(&kiblnd_data.kib_connd_waitq); \
813 spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);\
817 #define kiblnd_peer_addref(peer) \
819 CDEBUG(D_NET, "peer[%p] -> %s (%d)++\n", \
820 (peer), libcfs_nid2str((peer)->ibp_nid), \
821 atomic_read (&(peer)->ibp_refcount)); \
822 atomic_inc(&(peer)->ibp_refcount); \
825 #define kiblnd_peer_decref(peer) \
827 CDEBUG(D_NET, "peer[%p] -> %s (%d)--\n", \
828 (peer), libcfs_nid2str((peer)->ibp_nid), \
829 atomic_read (&(peer)->ibp_refcount)); \
830 LASSERT_ATOMIC_POS(&(peer)->ibp_refcount); \
831 if (atomic_dec_and_test(&(peer)->ibp_refcount)) \
832 kiblnd_destroy_peer(peer); \
835 static inline struct list_head *
836 kiblnd_nid2peerlist (lnet_nid_t nid)
839 ((unsigned int)nid) % kiblnd_data.kib_peer_hash_size;
841 return &kiblnd_data.kib_peers[hash];
845 kiblnd_peer_active (kib_peer_t *peer)
847 /* Am I in the peer hash table? */
848 return !list_empty(&peer->ibp_list);
851 static inline kib_conn_t *
852 kiblnd_get_conn_locked (kib_peer_t *peer)
854 LASSERT(!list_empty(&peer->ibp_conns));
856 /* just return the first connection */
857 return list_entry(peer->ibp_conns.next, kib_conn_t, ibc_list);
861 kiblnd_send_keepalive(kib_conn_t *conn)
863 return (*kiblnd_tunables.kib_keepalive > 0) &&
864 cfs_time_after(jiffies, conn->ibc_last_send +
865 *kiblnd_tunables.kib_keepalive*HZ);
869 kiblnd_need_noop(kib_conn_t *conn)
871 LASSERT (conn->ibc_state >= IBLND_CONN_ESTABLISHED);
873 if (conn->ibc_outstanding_credits <
874 IBLND_CREDITS_HIGHWATER(conn->ibc_version) &&
875 !kiblnd_send_keepalive(conn))
876 return 0; /* No need to send NOOP */
878 if (IBLND_OOB_CAPABLE(conn->ibc_version)) {
879 if (!list_empty(&conn->ibc_tx_queue_nocred))
880 return 0; /* NOOP can be piggybacked */
882 /* No tx to piggyback NOOP onto or no credit to send a tx */
883 return (list_empty(&conn->ibc_tx_queue) ||
884 conn->ibc_credits == 0);
887 if (!list_empty(&conn->ibc_tx_noops) || /* NOOP already queued */
888 !list_empty(&conn->ibc_tx_queue_nocred) || /* piggyback NOOP */
889 conn->ibc_credits == 0) /* no credit */
892 if (conn->ibc_credits == 1 && /* last credit reserved for */
893 conn->ibc_outstanding_credits == 0) /* giving back credits */
896 /* No tx to piggyback NOOP onto or no credit to send a tx */
897 return (list_empty(&conn->ibc_tx_queue) || conn->ibc_credits == 1);
901 kiblnd_abort_receives(kib_conn_t *conn)
903 ib_modify_qp(conn->ibc_cmid->qp,
904 &kiblnd_data.kib_error_qpa, IB_QP_STATE);
907 static inline const char *
908 kiblnd_queue2str(kib_conn_t *conn, struct list_head *q)
910 if (q == &conn->ibc_tx_queue)
913 if (q == &conn->ibc_tx_queue_rsrvd)
914 return "tx_queue_rsrvd";
916 if (q == &conn->ibc_tx_queue_nocred)
917 return "tx_queue_nocred";
919 if (q == &conn->ibc_active_txs)
926 /* CAVEAT EMPTOR: We rely on descriptor alignment to allow us to use the
927 * lowest bits of the work request id to stash the work item type. */
929 #define IBLND_WID_TX 0
930 #define IBLND_WID_RDMA 1
931 #define IBLND_WID_RX 2
932 #define IBLND_WID_MASK 3UL
935 kiblnd_ptr2wreqid (void *ptr, int type)
937 unsigned long lptr = (unsigned long)ptr;
939 LASSERT ((lptr & IBLND_WID_MASK) == 0);
940 LASSERT ((type & ~IBLND_WID_MASK) == 0);
941 return (__u64)(lptr | type);
945 kiblnd_wreqid2ptr (__u64 wreqid)
947 return (void *)(((unsigned long)wreqid) & ~IBLND_WID_MASK);
951 kiblnd_wreqid2type (__u64 wreqid)
953 return (wreqid & IBLND_WID_MASK);
957 kiblnd_set_conn_state (kib_conn_t *conn, int state)
959 conn->ibc_state = state;
964 kiblnd_init_msg (kib_msg_t *msg, int type, int body_nob)
966 msg->ibm_type = type;
967 msg->ibm_nob = offsetof(kib_msg_t, ibm_u) + body_nob;
971 kiblnd_rd_size (kib_rdma_desc_t *rd)
976 for (i = size = 0; i < rd->rd_nfrags; i++)
977 size += rd->rd_frags[i].rf_nob;
983 kiblnd_rd_frag_addr(kib_rdma_desc_t *rd, int index)
985 return rd->rd_frags[index].rf_addr;
989 kiblnd_rd_frag_size(kib_rdma_desc_t *rd, int index)
991 return rd->rd_frags[index].rf_nob;
995 kiblnd_rd_frag_key(kib_rdma_desc_t *rd, int index)
1001 kiblnd_rd_consume_frag(kib_rdma_desc_t *rd, int index, __u32 nob)
1003 if (nob < rd->rd_frags[index].rf_nob) {
1004 rd->rd_frags[index].rf_addr += nob;
1005 rd->rd_frags[index].rf_nob -= nob;
1014 kiblnd_rd_msg_size(kib_rdma_desc_t *rd, int msgtype, int n)
1016 LASSERT (msgtype == IBLND_MSG_GET_REQ ||
1017 msgtype == IBLND_MSG_PUT_ACK);
1019 return msgtype == IBLND_MSG_GET_REQ ?
1020 offsetof(kib_get_msg_t, ibgm_rd.rd_frags[n]) :
1021 offsetof(kib_putack_msg_t, ibpam_rd.rd_frags[n]);
1024 #ifdef HAVE_OFED_IB_DMA_MAP
1027 kiblnd_dma_mapping_error(struct ib_device *dev, u64 dma_addr)
1029 return ib_dma_mapping_error(dev, dma_addr);
1032 static inline __u64 kiblnd_dma_map_single(struct ib_device *dev,
1033 void *msg, size_t size,
1034 enum dma_data_direction direction)
1036 return ib_dma_map_single(dev, msg, size, direction);
1039 static inline void kiblnd_dma_unmap_single(struct ib_device *dev,
1040 __u64 addr, size_t size,
1041 enum dma_data_direction direction)
1043 ib_dma_unmap_single(dev, addr, size, direction);
1046 #define KIBLND_UNMAP_ADDR_SET(p, m, a) do {} while (0)
1047 #define KIBLND_UNMAP_ADDR(p, m, a) (a)
1049 static inline int kiblnd_dma_map_sg(struct ib_device *dev,
1050 struct scatterlist *sg, int nents,
1051 enum dma_data_direction direction)
1053 return ib_dma_map_sg(dev, sg, nents, direction);
1056 static inline void kiblnd_dma_unmap_sg(struct ib_device *dev,
1057 struct scatterlist *sg, int nents,
1058 enum dma_data_direction direction)
1060 ib_dma_unmap_sg(dev, sg, nents, direction);
1063 static inline __u64 kiblnd_sg_dma_address(struct ib_device *dev,
1064 struct scatterlist *sg)
1066 return ib_sg_dma_address(dev, sg);
1069 static inline unsigned int kiblnd_sg_dma_len(struct ib_device *dev,
1070 struct scatterlist *sg)
1072 return ib_sg_dma_len(dev, sg);
1075 /* XXX We use KIBLND_CONN_PARAM(e) as writable buffer, it's not strictly
1076 * right because OFED1.2 defines it as const, to use it we have to add
1077 * (void *) cast to overcome "const" */
1079 #define KIBLND_CONN_PARAM(e) ((e)->param.conn.private_data)
1080 #define KIBLND_CONN_PARAM_LEN(e) ((e)->param.conn.private_data_len)
1085 kiblnd_dma_mapping_error(struct ib_device *dev, dma_addr_t dma_addr)
1087 return dma_mapping_error(dma_addr);
1090 static inline dma_addr_t kiblnd_dma_map_single(struct ib_device *dev,
1091 void *msg, size_t size,
1092 enum dma_data_direction direction)
1094 return dma_map_single(dev->dma_device, msg, size, direction);
1097 static inline void kiblnd_dma_unmap_single(struct ib_device *dev,
1098 dma_addr_t addr, size_t size,
1099 enum dma_data_direction direction)
1101 dma_unmap_single(dev->dma_device, addr, size, direction);
1104 #define KIBLND_UNMAP_ADDR_SET(p, m, a) pci_unmap_addr_set(p, m, a)
1105 #define KIBLND_UNMAP_ADDR(p, m, a) pci_unmap_addr(p, m)
1107 static inline int kiblnd_dma_map_sg(struct ib_device *dev,
1108 struct scatterlist *sg, int nents,
1109 enum dma_data_direction direction)
1111 return dma_map_sg(dev->dma_device, sg, nents, direction);
1114 static inline void kiblnd_dma_unmap_sg(struct ib_device *dev,
1115 struct scatterlist *sg, int nents,
1116 enum dma_data_direction direction)
1118 return dma_unmap_sg(dev->dma_device, sg, nents, direction);
1122 static inline dma_addr_t kiblnd_sg_dma_address(struct ib_device *dev,
1123 struct scatterlist *sg)
1125 return sg_dma_address(sg);
1129 static inline unsigned int kiblnd_sg_dma_len(struct ib_device *dev,
1130 struct scatterlist *sg)
1132 return sg_dma_len(sg);
1135 #define KIBLND_CONN_PARAM(e) ((e)->private_data)
1136 #define KIBLND_CONN_PARAM_LEN(e) ((e)->private_data_len)
1140 struct ib_mr *kiblnd_find_rd_dma_mr(kib_hca_dev_t *hdev,
1141 kib_rdma_desc_t *rd);
1142 struct ib_mr *kiblnd_find_dma_mr(kib_hca_dev_t *hdev,
1143 __u64 addr, __u64 size);
1144 void kiblnd_map_rx_descs(kib_conn_t *conn);
1145 void kiblnd_unmap_rx_descs(kib_conn_t *conn);
1146 int kiblnd_map_tx(lnet_ni_t *ni, kib_tx_t *tx,
1147 kib_rdma_desc_t *rd, int nfrags);
1148 void kiblnd_unmap_tx(lnet_ni_t *ni, kib_tx_t *tx);
1149 void kiblnd_pool_free_node(kib_pool_t *pool, struct list_head *node);
1150 struct list_head *kiblnd_pool_alloc_node(kib_poolset_t *ps);
1152 int kiblnd_fmr_pool_map(kib_fmr_poolset_t *fps, __u64 *pages,
1153 int npages, __u64 iov, kib_fmr_t *fmr);
1154 void kiblnd_fmr_pool_unmap(kib_fmr_t *fmr, int status);
1156 int kiblnd_pmr_pool_map(kib_pmr_poolset_t *pps, kib_hca_dev_t *hdev,
1157 kib_rdma_desc_t *rd, __u64 *iova, kib_phys_mr_t **pp_pmr);
1158 void kiblnd_pmr_pool_unmap(kib_phys_mr_t *pmr);
1160 int kiblnd_startup (lnet_ni_t *ni);
1161 void kiblnd_shutdown (lnet_ni_t *ni);
1162 int kiblnd_ctl (lnet_ni_t *ni, unsigned int cmd, void *arg);
1163 void kiblnd_query (struct lnet_ni *ni, lnet_nid_t nid, cfs_time_t *when);
1165 int kiblnd_tunables_init(void);
1166 void kiblnd_tunables_fini(void);
1168 int kiblnd_connd (void *arg);
1169 int kiblnd_scheduler(void *arg);
1170 int kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name);
1171 int kiblnd_failover_thread (void *arg);
1173 int kiblnd_alloc_pages(kib_pages_t **pp, int cpt, int npages);
1174 void kiblnd_free_pages (kib_pages_t *p);
1176 int kiblnd_cm_callback(struct rdma_cm_id *cmid,
1177 struct rdma_cm_event *event);
1178 int kiblnd_translate_mtu(int value);
1180 int kiblnd_dev_failover(kib_dev_t *dev);
1181 int kiblnd_create_peer (lnet_ni_t *ni, kib_peer_t **peerp, lnet_nid_t nid);
1182 void kiblnd_destroy_peer (kib_peer_t *peer);
1183 void kiblnd_destroy_dev (kib_dev_t *dev);
1184 void kiblnd_unlink_peer_locked (kib_peer_t *peer);
1185 void kiblnd_peer_alive (kib_peer_t *peer);
1186 kib_peer_t *kiblnd_find_peer_locked (lnet_nid_t nid);
1187 void kiblnd_peer_connect_failed (kib_peer_t *peer, int active, int error);
1188 int kiblnd_close_stale_conns_locked (kib_peer_t *peer,
1189 int version, __u64 incarnation);
1190 int kiblnd_close_peer_conns_locked (kib_peer_t *peer, int why);
1192 void kiblnd_connreq_done(kib_conn_t *conn, int status);
1193 kib_conn_t *kiblnd_create_conn (kib_peer_t *peer, struct rdma_cm_id *cmid,
1194 int state, int version);
1195 void kiblnd_destroy_conn (kib_conn_t *conn);
1196 void kiblnd_close_conn (kib_conn_t *conn, int error);
1197 void kiblnd_close_conn_locked (kib_conn_t *conn, int error);
1199 int kiblnd_init_rdma (kib_conn_t *conn, kib_tx_t *tx, int type,
1200 int nob, kib_rdma_desc_t *dstrd, __u64 dstcookie);
1202 void kiblnd_launch_tx (lnet_ni_t *ni, kib_tx_t *tx, lnet_nid_t nid);
1203 void kiblnd_queue_tx_locked (kib_tx_t *tx, kib_conn_t *conn);
1204 void kiblnd_queue_tx (kib_tx_t *tx, kib_conn_t *conn);
1205 void kiblnd_init_tx_msg (lnet_ni_t *ni, kib_tx_t *tx, int type, int body_nob);
1206 void kiblnd_txlist_done(lnet_ni_t *ni, struct list_head *txlist, int status);
1207 void kiblnd_check_sends (kib_conn_t *conn);
1209 void kiblnd_qp_event(struct ib_event *event, void *arg);
1210 void kiblnd_cq_event(struct ib_event *event, void *arg);
1211 void kiblnd_cq_completion(struct ib_cq *cq, void *arg);
1213 void kiblnd_pack_msg (lnet_ni_t *ni, kib_msg_t *msg, int version,
1214 int credits, lnet_nid_t dstnid, __u64 dststamp);
1215 int kiblnd_unpack_msg(kib_msg_t *msg, int nob);
1216 int kiblnd_post_rx (kib_rx_t *rx, int credit);
1218 int kiblnd_send(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg);
1219 int kiblnd_recv(lnet_ni_t *ni, void *private, lnet_msg_t *lntmsg, int delayed,
1220 unsigned int niov, struct iovec *iov, lnet_kiov_t *kiov,
1221 unsigned int offset, unsigned int mlen, unsigned int rlen);