--- /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_OPENIBNAL
+
+#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 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);
+
+
+
+
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