/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2004 Cluster File Systems, Inc. * Author: Eric Barton * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define DEBUG_SUBSYSTEM S_OPENIBNAL #include #include #include #include #include #include #include #define OPENIBNAL_SERVICE_NAME "openibnal" #if CONFIG_SMP # define OPENIBNAL_N_SCHED num_online_cpus() /* # schedulers */ #else # define OPENIBNAL_N_SCHED 1 /* # schedulers */ #endif #define OPENIBNAL_MIN_RECONNECT_INTERVAL HZ /* first failed connection retry... */ #define OPENIBNAL_MAX_RECONNECT_INTERVAL (60*HZ) /* ...exponentially increasing to this */ #define OPENIBNAL_MSG_SIZE (4<<10) /* max size of queued messages (inc hdr) */ #define OPENIBNAL_MSG_QUEUE_SIZE 8 /* # messages in-flight */ #define OPENIBNAL_CREDIT_HIGHWATER 6 /* when to eagerly return credits */ #define OPENIBNAL_RETRY 7 /* # times to retry */ #define OPENIBNAL_RNR_RETRY 7 /* */ #define OPENIBNAL_CM_RETRY 7 /* # times to retry connection */ #define OPENIBNAL_FLOW_CONTROL 1 #define OPENIBNAL_RESPONDER_RESOURCES 8 #define OPENIBNAL_NTX 64 /* # tx descs */ #define OPENIBNAL_NTX_NBLK 256 /* # reserved tx descs */ #define OPENIBNAL_PEER_HASH_SIZE 101 /* # peer lists */ #define OPENIBNAL_RESCHED 100 /* # scheduler loops before reschedule */ #define OPENIBNAL_CONCURRENT_PEERS 1000 /* # nodes all talking at once to me */ /* default vals for runtime tunables */ #define OPENIBNAL_IO_TIMEOUT 50 /* default comms timeout (seconds) */ /************************/ /* derived constants... */ /* TX messages (shared by all connections) */ #define OPENIBNAL_TX_MSGS (OPENIBNAL_NTX + OPENIBNAL_NTX_NBLK) #define OPENIBNAL_TX_MSG_BYTES (OPENIBNAL_TX_MSGS * OPENIBNAL_MSG_SIZE) #define OPENIBNAL_TX_MSG_PAGES ((OPENIBNAL_TX_MSG_BYTES + PAGE_SIZE - 1)/PAGE_SIZE) /* we may have up to 2 completions per transmit */ #define OPENIBNAL_TX_CQ_ENTRIES (2*OPENIBNAL_TX_MSGS) /* RX messages (per connection) */ #define OPENIBNAL_RX_MSGS OPENIBNAL_MSG_QUEUE_SIZE #define OPENIBNAL_RX_MSG_BYTES (OPENIBNAL_RX_MSGS * OPENIBNAL_MSG_SIZE) #define OPENIBNAL_RX_MSG_PAGES ((OPENIBNAL_RX_MSG_BYTES + PAGE_SIZE - 1)/PAGE_SIZE) /* 1 completion per receive, per connection */ #define OPENIBNAL_RX_CQ_ENTRIES (OPENIBNAL_RX_MSGS * OPENIBNAL_CONCURRENT_PEERS) #define OPENIBNAL_RDMA_BASE 0x0eeb0000 #define OPENIBNAL_FMR 1 #define OPENIBNAL_CKSUM 0 //#define OPENIBNAL_CALLBACK_CTXT IB_CQ_CALLBACK_PROCESS #define OPENIBNAL_CALLBACK_CTXT IB_CQ_CALLBACK_INTERRUPT typedef struct { int koib_io_timeout; /* comms timeout (seconds) */ struct ctl_table_header *koib_sysctl; /* sysctl interface */ } koib_tunables_t; typedef struct { int oibp_npages; /* # pages */ int oibp_mapped; /* mapped? */ __u64 oibp_vaddr; /* mapped region vaddr */ __u32 oibp_lkey; /* mapped region lkey */ __u32 oibp_rkey; /* mapped region rkey */ struct ib_mr *oibp_handle; /* mapped region handle */ struct page *oibp_pages[0]; } koib_pages_t; typedef struct { int koib_init; /* initialisation state */ __u64 koib_incarnation; /* which one am I */ int koib_shutdown; /* shut down? */ atomic_t koib_nthreads; /* # live threads */ __u64 koib_cm_service_id; /* service number I listen on */ ptl_nid_t koib_nid; /* my NID */ struct semaphore koib_nid_mutex; /* serialise NID ops */ struct semaphore koib_nid_signal; /* signal completion */ rwlock_t koib_global_lock; /* stabilize peer/conn ops */ struct list_head *koib_peers; /* hash table of all my known peers */ int koib_peer_hash_size; /* size of koib_peers */ atomic_t koib_npeers; /* # peers extant */ atomic_t koib_nconns; /* # connections extant */ struct list_head koib_connd_conns; /* connections to progress */ struct list_head koib_connd_peers; /* peers waiting for a connection */ wait_queue_head_t koib_connd_waitq; /* connection daemons sleep here */ unsigned long koib_connd_waketime; /* when connd will wake */ spinlock_t koib_connd_lock; /* serialise */ wait_queue_head_t koib_sched_waitq; /* schedulers sleep here */ struct list_head koib_sched_txq; /* tx requiring attention */ struct list_head koib_sched_rxq; /* rx requiring attention */ spinlock_t koib_sched_lock; /* serialise */ struct koib_tx *koib_tx_descs; /* all the tx descriptors */ koib_pages_t *koib_tx_pages; /* premapped tx msg pages */ struct list_head koib_idle_txs; /* idle tx descriptors */ struct list_head koib_idle_nblk_txs; /* idle reserved tx descriptors */ wait_queue_head_t koib_idle_tx_waitq; /* block here for tx descriptor */ __u64 koib_next_tx_cookie; /* RDMA completion cookie */ spinlock_t koib_tx_lock; /* serialise */ struct ib_device *koib_device; /* "the" device */ struct ib_device_properties koib_device_props; /* its properties */ int koib_port; /* port on the device */ struct ib_port_properties koib_port_props; /* its properties */ struct ib_pd *koib_pd; /* protection domain */ #if OPENIBNAL_FMR struct ib_fmr_pool *koib_fmr_pool; /* fast memory region pool */ #endif struct ib_cq *koib_rx_cq; /* receive completion queue */ struct ib_cq *koib_tx_cq; /* transmit completion queue */ void *koib_listen_handle; /* where I listen for connections */ struct ib_common_attrib_service koib_service; /* SM service */ } koib_data_t; #define OPENIBNAL_INIT_NOTHING 0 #define OPENIBNAL_INIT_DATA 1 #define OPENIBNAL_INIT_LIB 2 #define OPENIBNAL_INIT_PD 3 #define OPENIBNAL_INIT_FMR 4 #define OPENIBNAL_INIT_TXD 5 #define OPENIBNAL_INIT_RX_CQ 6 #define OPENIBNAL_INIT_TX_CQ 7 #define OPENIBNAL_INIT_ALL 8 /************************************************************************ * Wire message structs. * These are sent in sender's byte order (i.e. receiver flips). * CAVEAT EMPTOR: other structs communicated between nodes (e.g. MAD * private data and SM service info), is LE on the wire. */ typedef struct { union { struct ib_mr *mr; struct ib_fmr *fmr; } md_handle; __u32 md_lkey; __u32 md_rkey; __u64 md_addr; } koib_md_t; typedef struct { __u32 rd_key; /* remote key */ __u32 rd_nob; /* # of bytes */ __u64 rd_addr; /* remote io vaddr */ } koib_rdma_desc_t; typedef struct { ptl_hdr_t oibim_hdr; /* portals header */ char oibim_payload[0]; /* piggy-backed payload */ } koib_immediate_msg_t; typedef struct { ptl_hdr_t oibrm_hdr; /* portals header */ __u64 oibrm_cookie; /* opaque completion cookie */ koib_rdma_desc_t oibrm_desc; /* where to suck/blow */ } koib_rdma_msg_t; typedef struct { __u64 oibcm_cookie; /* opaque completion cookie */ __u32 oibcm_status; /* completion status */ } koib_completion_msg_t; typedef struct { __u32 oibm_magic; /* I'm an openibnal message */ __u16 oibm_version; /* this is my version number */ __u8 oibm_type; /* msg type */ __u8 oibm_credits; /* returned credits */ #if OPENIBNAL_CKSUM __u32 oibm_nob; __u32 oibm_cksum; #endif union { koib_immediate_msg_t immediate; koib_rdma_msg_t rdma; koib_completion_msg_t completion; } oibm_u; } koib_msg_t; #define OPENIBNAL_MSG_MAGIC 0x0be91b91 /* unique magic */ #define OPENIBNAL_MSG_VERSION 1 /* current protocol version */ #define OPENIBNAL_MSG_NOOP 0xd0 /* nothing (just credits) */ #define OPENIBNAL_MSG_IMMEDIATE 0xd1 /* portals hdr + payload */ #define OPENIBNAL_MSG_PUT_RDMA 0xd2 /* portals PUT hdr + source rdma desc */ #define OPENIBNAL_MSG_PUT_DONE 0xd3 /* signal PUT rdma completion */ #define OPENIBNAL_MSG_GET_RDMA 0xd4 /* portals GET hdr + sink rdma desc */ #define OPENIBNAL_MSG_GET_DONE 0xd5 /* signal GET rdma completion */ /***********************************************************************/ typedef struct koib_rx /* receive message */ { struct list_head rx_list; /* queue for attention */ struct koib_conn *rx_conn; /* owning conn */ int rx_rdma; /* RDMA completion posted? */ int rx_posted; /* posted? */ __u64 rx_vaddr; /* pre-mapped buffer (hca vaddr) */ koib_msg_t *rx_msg; /* pre-mapped buffer (host vaddr) */ struct ib_receive_param rx_sp; /* receive work item */ struct ib_gather_scatter rx_gl; /* and it's memory */ } koib_rx_t; typedef struct koib_tx /* transmit message */ { struct list_head tx_list; /* queue on idle_txs ibc_tx_queue etc. */ int tx_isnblk; /* I'm reserved for non-blocking sends */ struct koib_conn *tx_conn; /* owning conn */ int tx_mapped; /* mapped for RDMA? */ int tx_sending; /* # tx callbacks outstanding */ int tx_status; /* completion status */ int tx_passive_rdma; /* waiting for peer to RDMA? */ int tx_passive_rdma_wait; /* on ibc_rdma_queue */ unsigned long tx_passive_rdma_deadline; /* completion deadline */ __u64 tx_passive_rdma_cookie; /* completion cookie */ lib_msg_t *tx_libmsg[2]; /* lib msgs to finalize on completion */ koib_md_t tx_md; /* RDMA mapping (active/passive) */ __u64 tx_vaddr; /* pre-mapped buffer (hca vaddr) */ koib_msg_t *tx_msg; /* pre-mapped buffer (host vaddr) */ int tx_nsp; /* # send work items */ struct ib_send_param tx_sp[2]; /* send work items... */ struct ib_gather_scatter tx_gl[2]; /* ...and their memory */ } koib_tx_t; #define KOIB_TX_UNMAPPED 0 #define KOIB_TX_MAPPED 1 #define KOIB_TX_MAPPED_FMR 2 typedef struct koib_wire_connreq { __u32 wcr_magic; /* I'm an openibnal connreq */ __u16 wcr_version; /* this is my version number */ __u16 wcr_queue_depth; /* this is my receive queue size */ __u64 wcr_nid; /* peer's NID */ __u64 wcr_incarnation; /* peer's incarnation */ } koib_wire_connreq_t; typedef struct koib_connreq { /* connection-in-progress */ struct koib_conn *cr_conn; koib_wire_connreq_t cr_wcr; __u64 cr_tid; struct ib_common_attrib_service cr_service; tTS_IB_GID cr_gid; struct ib_path_record cr_path; struct ib_cm_active_param cr_connparam; } koib_connreq_t; typedef struct koib_conn { struct koib_peer *ibc_peer; /* owning peer */ struct list_head ibc_list; /* stash on peer's conn list */ __u64 ibc_incarnation; /* which instance of the peer */ atomic_t ibc_refcount; /* # users */ int ibc_state; /* what's happening */ atomic_t ibc_nob; /* # bytes buffered */ int ibc_nsends_posted; /* # uncompleted sends */ int ibc_credits; /* # credits I have */ int ibc_outstanding_credits; /* # credits to return */ struct list_head ibc_tx_queue; /* send queue */ struct list_head ibc_rdma_queue; /* tx awaiting RDMA completion */ spinlock_t ibc_lock; /* serialise */ koib_rx_t *ibc_rxs; /* the rx descs */ koib_pages_t *ibc_rx_pages; /* premapped rx msg pages */ struct ib_qp *ibc_qp; /* queue pair */ __u32 ibc_qpn; /* queue pair number */ tTS_IB_CM_COMM_ID ibc_comm_id; /* connection ID? */ koib_connreq_t *ibc_connreq; /* connection request state */ } koib_conn_t; #define OPENIBNAL_CONN_INIT_NOTHING 0 /* initial state */ #define OPENIBNAL_CONN_INIT_QP 1 /* ibc_qp set up */ #define OPENIBNAL_CONN_CONNECTING 2 /* started to connect */ #define OPENIBNAL_CONN_ESTABLISHED 3 /* connection established */ #define OPENIBNAL_CONN_DEATHROW 4 /* waiting to be closed */ #define OPENIBNAL_CONN_ZOMBIE 5 /* waiting to be freed */ typedef struct koib_peer { struct list_head ibp_list; /* stash on global peer list */ struct list_head ibp_connd_list; /* schedule on koib_connd_peers */ ptl_nid_t ibp_nid; /* who's on the other end(s) */ atomic_t ibp_refcount; /* # users */ int ibp_persistence; /* "known" peer refs */ struct list_head ibp_conns; /* all active connections */ struct list_head ibp_tx_queue; /* msgs waiting for a conn */ int ibp_connecting; /* connecting+accepting */ unsigned long ibp_reconnect_time; /* when reconnect may be attempted */ unsigned long ibp_reconnect_interval; /* exponential backoff */ } koib_peer_t; extern lib_nal_t koibnal_lib; extern koib_data_t koibnal_data; extern koib_tunables_t koibnal_tunables; static inline struct list_head * koibnal_nid2peerlist (ptl_nid_t nid) { unsigned int hash = ((unsigned int)nid) % koibnal_data.koib_peer_hash_size; return (&koibnal_data.koib_peers [hash]); } static inline int koibnal_peer_active(koib_peer_t *peer) { /* Am I in the peer hash table? */ return (!list_empty(&peer->ibp_list)); } static inline void koibnal_queue_tx_locked (koib_tx_t *tx, koib_conn_t *conn) { /* CAVEAT EMPTOR: tx takes caller's ref on conn */ LASSERT (tx->tx_nsp > 0); /* work items set up */ LASSERT (tx->tx_conn == NULL); /* only set here */ tx->tx_conn = conn; list_add_tail(&tx->tx_list, &conn->ibc_tx_queue); } #define KOIBNAL_SERVICE_KEY_MASK (IB_SA_SERVICE_COMP_MASK_NAME | \ IB_SA_SERVICE_COMP_MASK_DATA8_1 | \ IB_SA_SERVICE_COMP_MASK_DATA8_2 | \ IB_SA_SERVICE_COMP_MASK_DATA8_3 | \ IB_SA_SERVICE_COMP_MASK_DATA8_4 | \ IB_SA_SERVICE_COMP_MASK_DATA8_5 | \ IB_SA_SERVICE_COMP_MASK_DATA8_6 | \ IB_SA_SERVICE_COMP_MASK_DATA8_7 | \ IB_SA_SERVICE_COMP_MASK_DATA8_8) static inline __u64* koibnal_service_nid_field(struct ib_common_attrib_service *srv) { /* must be consistent with KOIBNAL_SERVICE_KEY_MASK */ return (__u64 *)srv->service_data8; } static inline void koibnal_set_service_keys(struct ib_common_attrib_service *srv, ptl_nid_t nid) { LASSERT (strlen (OPENIBNAL_SERVICE_NAME) < sizeof(srv->service_name)); memset (srv->service_name, 0, sizeof(srv->service_name)); strcpy (srv->service_name, OPENIBNAL_SERVICE_NAME); *koibnal_service_nid_field(srv) = cpu_to_le64(nid); } #if 0 static inline void koibnal_show_rdma_attr (koib_conn_t *conn) { struct ib_qp_attribute qp_attr; int rc; memset (&qp_attr, 0, sizeof(qp_attr)); rc = ib_qp_query(conn->ibc_qp, &qp_attr); if (rc != 0) { CERROR ("Can't get qp attrs: %d\n", rc); return; } CWARN ("RDMA CAPABILITY: write %s read %s\n", (qp_attr.valid_fields & TS_IB_QP_ATTRIBUTE_RDMA_ATOMIC_ENABLE) ? (qp_attr.enable_rdma_write ? "enabled" : "disabled") : "invalid", (qp_attr.valid_fields & TS_IB_QP_ATTRIBUTE_RDMA_ATOMIC_ENABLE) ? (qp_attr.enable_rdma_read ? "enabled" : "disabled") : "invalid"); } #endif #if CONFIG_X86 static inline __u64 koibnal_page2phys (struct page *p) { __u64 page_number = p - mem_map; return (page_number << PAGE_SHIFT); } #else # error "no page->phys" #endif extern koib_peer_t *koibnal_create_peer (ptl_nid_t nid); extern void koibnal_put_peer (koib_peer_t *peer); extern int koibnal_del_peer (ptl_nid_t nid, int single_share); extern koib_peer_t *koibnal_find_peer_locked (ptl_nid_t nid); extern void koibnal_unlink_peer_locked (koib_peer_t *peer); extern int koibnal_close_stale_conns_locked (koib_peer_t *peer, __u64 incarnation); extern koib_conn_t *koibnal_create_conn (void); extern void koibnal_put_conn (koib_conn_t *conn); extern void koibnal_destroy_conn (koib_conn_t *conn); extern int koibnal_alloc_pages (koib_pages_t **pp, int npages, int access); extern void koibnal_free_pages (koib_pages_t *p); extern void koibnal_check_sends (koib_conn_t *conn); extern tTS_IB_CM_CALLBACK_RETURN koibnal_conn_callback (tTS_IB_CM_EVENT event, tTS_IB_CM_COMM_ID cid, void *param, void *arg); extern tTS_IB_CM_CALLBACK_RETURN koibnal_passive_conn_callback (tTS_IB_CM_EVENT event, tTS_IB_CM_COMM_ID cid, void *param, void *arg); extern void koibnal_close_conn_locked (koib_conn_t *conn, int error); extern void koibnal_destroy_conn (koib_conn_t *conn); extern int koibnal_thread_start (int (*fn)(void *arg), void *arg); extern int koibnal_scheduler(void *arg); extern int koibnal_connd (void *arg); extern void koibnal_rx_callback (struct ib_cq *cq, struct ib_cq_entry *e, void *arg); extern void koibnal_tx_callback (struct ib_cq *cq, struct ib_cq_entry *e, void *arg); extern void koibnal_init_tx_msg (koib_tx_t *tx, int type, int body_nob); extern int koibnal_close_conn (koib_conn_t *conn, int why); extern void koibnal_start_active_rdma (int type, int status, koib_rx_t *rx, lib_msg_t *libmsg, unsigned int niov, struct iovec *iov, ptl_kiov_t *kiov, size_t offset, size_t nob);