+++ /dev/null
-/* -*- 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 <eric@bartonsoftware.com>
- *
- * 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 <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/stat.h>
-#include <linux/errno.h>
-#include <linux/smp_lock.h>
-#include <linux/unistd.h>
-#include <linux/uio.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/stat.h>
-#include <linux/list.h>
-#include <linux/kmod.h>
-#include <linux/sysctl.h>
-
-#define DEBUG_SUBSYSTEM S_NAL
-
-#include <linux/kp30.h>
-#include <portals/p30.h>
-#include <portals/lib-p30.h>
-#include <portals/nal.h>
-
-#include <ts_ib_core.h>
-#include <ts_ib_cm.h>
-#include <ts_ib_sa_client.h>
-
-#define IBNAL_SERVICE_NAME "openibnal"
-
-#if CONFIG_SMP
-# define IBNAL_N_SCHED num_online_cpus() /* # schedulers */
-#else
-# define IBNAL_N_SCHED 1 /* # schedulers */
-#endif
-
-#define IBNAL_MIN_RECONNECT_INTERVAL HZ /* first failed connection retry... */
-#define IBNAL_MAX_RECONNECT_INTERVAL (60*HZ) /* ...exponentially increasing to this */
-
-#define IBNAL_MSG_SIZE (4<<10) /* max size of queued messages (inc hdr) */
-
-#define IBNAL_MSG_QUEUE_SIZE 8 /* # messages/RDMAs in-flight */
-#define IBNAL_CREDIT_HIGHWATER 6 /* when to eagerly return credits */
-#define IBNAL_RETRY 7 /* # times to retry */
-#define IBNAL_RNR_RETRY 7 /* */
-#define IBNAL_CM_RETRY 7 /* # times to retry connection */
-#define IBNAL_FLOW_CONTROL 1
-#define IBNAL_RESPONDER_RESOURCES 8
-
-#define IBNAL_NTX 64 /* # tx descs */
-#define IBNAL_NTX_NBLK 256 /* # reserved tx descs */
-
-#define IBNAL_PEER_HASH_SIZE 101 /* # peer lists */
-
-#define IBNAL_RESCHED 100 /* # scheduler loops before reschedule */
-
-#define IBNAL_CONCURRENT_PEERS 1000 /* # nodes all talking at once to me */
-
-/* default vals for runtime tunables */
-#define IBNAL_IO_TIMEOUT 50 /* default comms timeout (seconds) */
-
-/************************/
-/* derived constants... */
-
-/* TX messages (shared by all connections) */
-#define IBNAL_TX_MSGS (IBNAL_NTX + IBNAL_NTX_NBLK)
-#define IBNAL_TX_MSG_BYTES (IBNAL_TX_MSGS * IBNAL_MSG_SIZE)
-#define IBNAL_TX_MSG_PAGES ((IBNAL_TX_MSG_BYTES + PAGE_SIZE - 1)/PAGE_SIZE)
-
-/* RX messages (per connection) */
-#define IBNAL_RX_MSGS IBNAL_MSG_QUEUE_SIZE
-#define IBNAL_RX_MSG_BYTES (IBNAL_RX_MSGS * IBNAL_MSG_SIZE)
-#define IBNAL_RX_MSG_PAGES ((IBNAL_RX_MSG_BYTES + PAGE_SIZE - 1)/PAGE_SIZE)
-
-/* we may have up to 2 completions per transmit +
- 1 completion per receive, per connection */
-#define IBNAL_CQ_ENTRIES ((2*IBNAL_TX_MSGS) + \
- (IBNAL_RX_MSGS * IBNAL_CONCURRENT_PEERS))
-
-#define IBNAL_RDMA_BASE 0x0eeb0000
-#define IBNAL_FMR 1
-#define IBNAL_CKSUM 0
-//#define IBNAL_CALLBACK_CTXT IB_CQ_CALLBACK_PROCESS
-#define IBNAL_CALLBACK_CTXT IB_CQ_CALLBACK_INTERRUPT
-
-typedef struct
-{
- int kib_io_timeout; /* comms timeout (seconds) */
- struct ctl_table_header *kib_sysctl; /* sysctl interface */
-} kib_tunables_t;
-
-typedef struct
-{
- int ibp_npages; /* # pages */
- int ibp_mapped; /* mapped? */
- __u64 ibp_vaddr; /* mapped region vaddr */
- __u32 ibp_lkey; /* mapped region lkey */
- __u32 ibp_rkey; /* mapped region rkey */
- struct ib_mr *ibp_handle; /* mapped region handle */
- struct page *ibp_pages[0];
-} kib_pages_t;
-
-typedef struct
-{
- int kib_init; /* initialisation state */
- __u64 kib_incarnation; /* which one am I */
- int kib_shutdown; /* shut down? */
- atomic_t kib_nthreads; /* # live threads */
-
- __u64 kib_service_id; /* service number I listen on */
- ptl_nid_t kib_nid; /* my NID */
- struct semaphore kib_nid_mutex; /* serialise NID ops */
- struct semaphore kib_nid_signal; /* signal completion */
-
- rwlock_t kib_global_lock; /* stabilize peer/conn ops */
-
- struct list_head *kib_peers; /* hash table of all my known peers */
- int kib_peer_hash_size; /* size of kib_peers */
- atomic_t kib_npeers; /* # peers extant */
- atomic_t kib_nconns; /* # connections extant */
-
- struct list_head kib_connd_conns; /* connections to progress */
- struct list_head kib_connd_peers; /* peers waiting for a connection */
- wait_queue_head_t kib_connd_waitq; /* connection daemons sleep here */
- unsigned long kib_connd_waketime; /* when connd will wake */
- spinlock_t kib_connd_lock; /* serialise */
-
- wait_queue_head_t kib_sched_waitq; /* schedulers sleep here */
- struct list_head kib_sched_txq; /* tx requiring attention */
- struct list_head kib_sched_rxq; /* rx requiring attention */
- spinlock_t kib_sched_lock; /* serialise */
-
- struct kib_tx *kib_tx_descs; /* all the tx descriptors */
- kib_pages_t *kib_tx_pages; /* premapped tx msg pages */
-
- struct list_head kib_idle_txs; /* idle tx descriptors */
- struct list_head kib_idle_nblk_txs; /* idle reserved tx descriptors */
- wait_queue_head_t kib_idle_tx_waitq; /* block here for tx descriptor */
- __u64 kib_next_tx_cookie; /* RDMA completion cookie */
- spinlock_t kib_tx_lock; /* serialise */
-
- struct ib_device *kib_device; /* "the" device */
- struct ib_device_properties kib_device_props; /* its properties */
- int kib_port; /* port on the device */
- struct ib_port_properties kib_port_props; /* its properties */
- struct ib_pd *kib_pd; /* protection domain */
-#if IBNAL_FMR
- struct ib_fmr_pool *kib_fmr_pool; /* fast memory region pool */
-#endif
- struct ib_cq *kib_cq; /* completion queue */
- void *kib_listen_handle; /* where I listen for connections */
-
-} kib_data_t;
-
-#define IBNAL_INIT_NOTHING 0
-#define IBNAL_INIT_DATA 1
-#define IBNAL_INIT_LIB 2
-#define IBNAL_INIT_PD 3
-#define IBNAL_INIT_FMR 4
-#define IBNAL_INIT_TXD 5
-#define IBNAL_INIT_CQ 6
-#define IBNAL_INIT_ALL 7
-
-/************************************************************************
- * 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;
-} kib_md_t;
-
-typedef struct
-{
- __u32 rd_key; /* remote key */
- __u32 rd_nob; /* # of bytes */
- __u64 rd_addr; /* remote io vaddr */
-} kib_rdma_desc_t;
-
-
-typedef struct
-{
- ptl_hdr_t ibim_hdr; /* portals header */
- char ibim_payload[0]; /* piggy-backed payload */
-} kib_immediate_msg_t;
-
-typedef struct
-{
- ptl_hdr_t ibrm_hdr; /* portals header */
- __u64 ibrm_cookie; /* opaque completion cookie */
- kib_rdma_desc_t ibrm_desc; /* where to suck/blow */
-} kib_rdma_msg_t;
-
-typedef struct
-{
- __u64 ibcm_cookie; /* opaque completion cookie */
- __u32 ibcm_status; /* completion status */
-} kib_completion_msg_t;
-
-typedef struct
-{
- __u32 ibm_magic; /* I'm an openibnal message */
- __u16 ibm_version; /* this is my version number */
- __u8 ibm_type; /* msg type */
- __u8 ibm_credits; /* returned credits */
-#if IBNAL_CKSUM
- __u32 ibm_nob;
- __u32 ibm_cksum;
-#endif
- union {
- kib_immediate_msg_t immediate;
- kib_rdma_msg_t rdma;
- kib_completion_msg_t completion;
- } ibm_u;
-} kib_msg_t;
-
-#define IBNAL_MSG_MAGIC 0x0be91b91 /* unique magic */
-#define IBNAL_MSG_VERSION 1 /* current protocol version */
-
-#define IBNAL_MSG_NOOP 0xd0 /* nothing (just credits) */
-#define IBNAL_MSG_IMMEDIATE 0xd1 /* portals hdr + payload */
-#define IBNAL_MSG_PUT_RDMA 0xd2 /* portals PUT hdr + source rdma desc */
-#define IBNAL_MSG_PUT_DONE 0xd3 /* signal PUT rdma completion */
-#define IBNAL_MSG_GET_RDMA 0xd4 /* portals GET hdr + sink rdma desc */
-#define IBNAL_MSG_GET_DONE 0xd5 /* signal GET rdma completion */
-
-/***********************************************************************/
-
-typedef struct kib_rx /* receive message */
-{
- struct list_head rx_list; /* queue for attention */
- struct kib_conn *rx_conn; /* owning conn */
- int rx_rdma; /* RDMA completion posted? */
- int rx_posted; /* posted? */
- __u64 rx_vaddr; /* pre-mapped buffer (hca vaddr) */
- kib_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 */
-} kib_rx_t;
-
-typedef struct kib_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 kib_conn *tx_conn; /* owning conn */
- int tx_mapped; /* mapped for RDMA? */
- int tx_sending; /* # tx callbacks outstanding */
- int tx_status; /* completion status */
- unsigned long tx_deadline; /* completion deadline */
- int tx_passive_rdma; /* peer sucks/blows */
- int tx_passive_rdma_wait; /* waiting for peer to complete */
- __u64 tx_passive_rdma_cookie; /* completion cookie */
- lib_msg_t *tx_libmsg[2]; /* lib msgs to finalize on completion */
- kib_md_t tx_md; /* RDMA mapping (active/passive) */
- __u64 tx_vaddr; /* pre-mapped buffer (hca vaddr) */
- kib_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 */
-} kib_tx_t;
-
-#define KIB_TX_UNMAPPED 0
-#define KIB_TX_MAPPED 1
-#define KIB_TX_MAPPED_FMR 2
-
-typedef struct kib_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 */
-} kib_wire_connreq_t;
-
-typedef struct kib_connreq
-{
- /* connection-in-progress */
- struct kib_conn *cr_conn;
- kib_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;
-} kib_connreq_t;
-
-typedef struct kib_conn
-{
- struct kib_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_active_txs; /* active tx awaiting completion */
- spinlock_t ibc_lock; /* serialise */
- kib_rx_t *ibc_rxs; /* the rx descs */
- kib_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? */
- kib_connreq_t *ibc_connreq; /* connection request state */
-} kib_conn_t;
-
-#define IBNAL_CONN_INIT_NOTHING 0 /* initial state */
-#define IBNAL_CONN_INIT_QP 1 /* ibc_qp set up */
-#define IBNAL_CONN_CONNECTING 2 /* started to connect */
-#define IBNAL_CONN_ESTABLISHED 3 /* connection established */
-#define IBNAL_CONN_DEATHROW 4 /* waiting to be closed */
-#define IBNAL_CONN_ZOMBIE 5 /* waiting to be freed */
-
-typedef struct kib_peer
-{
- struct list_head ibp_list; /* stash on global peer list */
- struct list_head ibp_connd_list; /* schedule on kib_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 */
-} kib_peer_t;
-
-
-extern lib_nal_t kibnal_lib;
-extern kib_data_t kibnal_data;
-extern kib_tunables_t kibnal_tunables;
-
-static inline struct list_head *
-kibnal_nid2peerlist (ptl_nid_t nid)
-{
- unsigned int hash = ((unsigned int)nid) % kibnal_data.kib_peer_hash_size;
-
- return (&kibnal_data.kib_peers [hash]);
-}
-
-static inline int
-kibnal_peer_active(kib_peer_t *peer)
-{
- /* Am I in the peer hash table? */
- return (!list_empty(&peer->ibp_list));
-}
-
-static inline void
-kibnal_queue_tx_locked (kib_tx_t *tx, kib_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;
- tx->tx_deadline = jiffies + kibnal_tunables.kib_io_timeout * HZ;
- list_add_tail(&tx->tx_list, &conn->ibc_tx_queue);
-}
-
-#define KIBNAL_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*
-kibnal_service_nid_field(struct ib_common_attrib_service *srv)
-{
- /* must be consistent with KIBNAL_SERVICE_KEY_MASK */
- return (__u64 *)srv->service_data8;
-}
-
-
-static inline void
-kibnal_set_service_keys(struct ib_common_attrib_service *srv, ptl_nid_t nid)
-{
- LASSERT (strlen (IBNAL_SERVICE_NAME) < sizeof(srv->service_name));
- memset (srv->service_name, 0, sizeof(srv->service_name));
- strcpy (srv->service_name, IBNAL_SERVICE_NAME);
-
- *kibnal_service_nid_field(srv) = cpu_to_le64(nid);
-}
-
-#if 0
-static inline void
-kibnal_show_rdma_attr (kib_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
-kibnal_page2phys (struct page *p)
-{
- __u64 page_number = p - mem_map;
-
- return (page_number << PAGE_SHIFT);
-}
-#else
-# error "no page->phys"
-#endif
-
-/* CAVEAT EMPTOR:
- * We rely on tx/rx descriptor alignment to allow us to use the lowest bit
- * of the work request id as a flag to determine if the completion is for a
- * transmit or a receive. It seems that that the CQ entry's 'op' field
- * isn't always set correctly on completions that occur after QP teardown. */
-
-static inline __u64
-kibnal_ptr2wreqid (void *ptr, int isrx)
-{
- unsigned long lptr = (unsigned long)ptr;
-
- LASSERT ((lptr & 1) == 0);
- return (__u64)(lptr | (isrx ? 1 : 0));
-}
-
-static inline void *
-kibnal_wreqid2ptr (__u64 wreqid)
-{
- return (void *)(((unsigned long)wreqid) & ~1UL);
-}
-
-static inline int
-kibnal_wreqid_is_rx (__u64 wreqid)
-{
- return (wreqid & 1) != 0;
-}
-
-extern kib_peer_t *kibnal_create_peer (ptl_nid_t nid);
-extern void kibnal_put_peer (kib_peer_t *peer);
-extern int kibnal_del_peer (ptl_nid_t nid, int single_share);
-extern kib_peer_t *kibnal_find_peer_locked (ptl_nid_t nid);
-extern void kibnal_unlink_peer_locked (kib_peer_t *peer);
-extern int kibnal_close_stale_conns_locked (kib_peer_t *peer,
- __u64 incarnation);
-extern kib_conn_t *kibnal_create_conn (void);
-extern void kibnal_put_conn (kib_conn_t *conn);
-extern void kibnal_destroy_conn (kib_conn_t *conn);
-extern int kibnal_alloc_pages (kib_pages_t **pp, int npages, int access);
-extern void kibnal_free_pages (kib_pages_t *p);
-
-extern void kibnal_check_sends (kib_conn_t *conn);
-
-extern tTS_IB_CM_CALLBACK_RETURN
-kibnal_conn_callback (tTS_IB_CM_EVENT event, tTS_IB_CM_COMM_ID cid,
- void *param, void *arg);
-extern tTS_IB_CM_CALLBACK_RETURN
-kibnal_passive_conn_callback (tTS_IB_CM_EVENT event, tTS_IB_CM_COMM_ID cid,
- void *param, void *arg);
-
-extern void kibnal_close_conn_locked (kib_conn_t *conn, int error);
-extern void kibnal_destroy_conn (kib_conn_t *conn);
-extern int kibnal_thread_start (int (*fn)(void *arg), void *arg);
-extern int kibnal_scheduler(void *arg);
-extern int kibnal_connd (void *arg);
-extern void kibnal_callback (struct ib_cq *cq, struct ib_cq_entry *e, void *arg);
-extern void kibnal_init_tx_msg (kib_tx_t *tx, int type, int body_nob);
-extern int kibnal_close_conn (kib_conn_t *conn, int why);
-extern void kibnal_start_active_rdma (int type, int status,
- kib_rx_t *rx, lib_msg_t *libmsg,
- unsigned int niov,
- struct iovec *iov, ptl_kiov_t *kiov,
- size_t offset, size_t nob);
-
-
-
-
-
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