diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.h')
| -rw-r--r-- | drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.h | 1048 |
1 files changed, 0 insertions, 1048 deletions
diff --git a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.h b/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.h deleted file mode 100644 index 217503f125bc..000000000000 --- a/drivers/staging/lustre/lnet/klnds/o2iblnd/o2iblnd.h +++ /dev/null @@ -1,1048 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program 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 version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lnet/klnds/o2iblnd/o2iblnd.h - * - * Author: Eric Barton <eric@bartonsoftware.com> - */ - -#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/unistd.h> -#include <linux/uio.h> -#include <linux/uaccess.h> - -#include <linux/io.h> - -#include <linux/fs.h> -#include <linux/file.h> -#include <linux/list.h> -#include <linux/kmod.h> -#include <linux/sysctl.h> -#include <linux/pci.h> - -#include <net/sock.h> -#include <linux/in.h> - -#include <rdma/rdma_cm.h> -#include <rdma/ib_cm.h> -#include <rdma/ib_verbs.h> -#include <rdma/ib_fmr_pool.h> - -#define DEBUG_SUBSYSTEM S_LND - -#include <linux/lnet/lib-lnet.h> - -#define IBLND_PEER_HASH_SIZE 101 /* # peer lists */ -/* # scheduler loops before reschedule */ -#define IBLND_RESCHED 100 - -#define IBLND_N_SCHED 2 -#define IBLND_N_SCHED_HIGH 4 - -struct kib_tunables { - int *kib_dev_failover; /* HCA failover */ - unsigned int *kib_service; /* IB service number */ - int *kib_min_reconnect_interval; /* first failed connection retry... */ - int *kib_max_reconnect_interval; /* exponentially increasing to this */ - int *kib_cksum; /* checksum struct kib_msg? */ - int *kib_timeout; /* comms timeout (seconds) */ - int *kib_keepalive; /* keepalive timeout (seconds) */ - int *kib_ntx; /* # tx descs */ - char **kib_default_ipif; /* default IPoIB interface */ - int *kib_retry_count; - int *kib_rnr_retry_count; - int *kib_ib_mtu; /* IB MTU */ - int *kib_require_priv_port; /* accept only privileged ports */ - int *kib_use_priv_port; /* use privileged port for active connect */ - int *kib_nscheds; /* # threads on each CPT */ -}; - -extern struct kib_tunables kiblnd_tunables; - -#define IBLND_MSG_QUEUE_SIZE_V1 8 /* V1 only : # messages/RDMAs in-flight */ -#define IBLND_CREDIT_HIGHWATER_V1 7 /* V1 only : when eagerly to return credits */ - -#define IBLND_CREDITS_DEFAULT 8 /* default # of peer credits */ -#define IBLND_CREDITS_MAX ((typeof(((struct kib_msg *)0)->ibm_credits)) - 1) /* Max # of peer credits */ - -/* when eagerly to return credits */ -#define IBLND_CREDITS_HIGHWATER(t, v) ((v) == IBLND_MSG_VERSION_1 ? \ - IBLND_CREDIT_HIGHWATER_V1 : \ - t->lnd_peercredits_hiw) - -#define kiblnd_rdma_create_id(cb, dev, ps, qpt) rdma_create_id(current->nsproxy->net_ns, \ - cb, dev, \ - ps, qpt) - -/* 2 OOB shall suffice for 1 keepalive and 1 returning credits */ -#define IBLND_OOB_CAPABLE(v) ((v) != IBLND_MSG_VERSION_1) -#define IBLND_OOB_MSGS(v) (IBLND_OOB_CAPABLE(v) ? 2 : 0) - -#define IBLND_FRAG_SHIFT (PAGE_SHIFT - 12) /* frag size on wire is in 4K units */ -#define IBLND_MSG_SIZE (4 << 10) /* max size of queued messages (inc hdr) */ -#define IBLND_MAX_RDMA_FRAGS (LNET_MAX_PAYLOAD >> 12)/* max # of fragments supported in 4K size */ - -/************************/ -/* derived constants... */ -/* Pools (shared by connections on each CPT) */ -/* These pools can grow at runtime, so don't need give a very large value */ -#define IBLND_TX_POOL 256 -#define IBLND_FMR_POOL 256 -#define IBLND_FMR_POOL_FLUSH 192 - -#define IBLND_RX_MSGS(c) \ - ((c->ibc_queue_depth) * 2 + IBLND_OOB_MSGS(c->ibc_version)) -#define IBLND_RX_MSG_BYTES(c) (IBLND_RX_MSGS(c) * IBLND_MSG_SIZE) -#define IBLND_RX_MSG_PAGES(c) \ - ((IBLND_RX_MSG_BYTES(c) + PAGE_SIZE - 1) / PAGE_SIZE) - -/* WRs and CQEs (per connection) */ -#define IBLND_RECV_WRS(c) IBLND_RX_MSGS(c) -#define IBLND_SEND_WRS(c) \ - (((c->ibc_max_frags + 1) << IBLND_FRAG_SHIFT) * \ - kiblnd_concurrent_sends(c->ibc_version, c->ibc_peer->ibp_ni)) -#define IBLND_CQ_ENTRIES(c) (IBLND_RECV_WRS(c) + IBLND_SEND_WRS(c)) - -struct kib_hca_dev; - -/* o2iblnd can run over aliased interface */ -#ifdef IFALIASZ -#define KIB_IFNAME_SIZE IFALIASZ -#else -#define KIB_IFNAME_SIZE 256 -#endif - -struct kib_dev { - struct list_head ibd_list; /* chain on kib_devs */ - struct list_head ibd_fail_list; /* chain on kib_failed_devs */ - __u32 ibd_ifip; /* IPoIB interface IP */ - - /* IPoIB interface name */ - char ibd_ifname[KIB_IFNAME_SIZE]; - int ibd_nnets; /* # nets extant */ - - unsigned long ibd_next_failover; - int ibd_failed_failover; /* # failover failures */ - unsigned int ibd_failover; /* failover in progress */ - unsigned int ibd_can_failover; /* IPoIB interface is a bonding master */ - struct list_head ibd_nets; - struct kib_hca_dev *ibd_hdev; -}; - -struct kib_hca_dev { - struct rdma_cm_id *ibh_cmid; /* listener cmid */ - struct ib_device *ibh_ibdev; /* IB device */ - int ibh_page_shift; /* page shift of current HCA */ - int ibh_page_size; /* page size of current HCA */ - __u64 ibh_page_mask; /* page mask of current HCA */ - int ibh_mr_shift; /* bits shift of max MR size */ - __u64 ibh_mr_size; /* size of MR */ - struct ib_pd *ibh_pd; /* PD */ - struct kib_dev *ibh_dev; /* owner */ - atomic_t ibh_ref; /* refcount */ -}; - -/** # of seconds to keep pool alive */ -#define IBLND_POOL_DEADLINE 300 -/** # of seconds to retry if allocation failed */ -#define IBLND_POOL_RETRY 1 - -struct kib_pages { - int ibp_npages; /* # pages */ - struct page *ibp_pages[0]; /* page array */ -}; - -struct kib_pool; -struct kib_poolset; - -typedef int (*kib_ps_pool_create_t)(struct kib_poolset *ps, - int inc, struct kib_pool **pp_po); -typedef void (*kib_ps_pool_destroy_t)(struct kib_pool *po); -typedef void (*kib_ps_node_init_t)(struct kib_pool *po, struct list_head *node); -typedef void (*kib_ps_node_fini_t)(struct kib_pool *po, struct list_head *node); - -struct kib_net; - -#define IBLND_POOL_NAME_LEN 32 - -struct kib_poolset { - spinlock_t ps_lock; /* serialize */ - struct kib_net *ps_net; /* network it belongs to */ - char ps_name[IBLND_POOL_NAME_LEN]; /* pool set name */ - struct list_head ps_pool_list; /* list of pools */ - struct list_head ps_failed_pool_list;/* failed pool list */ - unsigned long ps_next_retry; /* time stamp for retry if */ - /* failed to allocate */ - int ps_increasing; /* is allocating new pool */ - int ps_pool_size; /* new pool size */ - int ps_cpt; /* CPT id */ - - kib_ps_pool_create_t ps_pool_create; /* create a new pool */ - kib_ps_pool_destroy_t ps_pool_destroy; /* destroy a pool */ - kib_ps_node_init_t ps_node_init; /* initialize new allocated node */ - kib_ps_node_fini_t ps_node_fini; /* finalize node */ -}; - -struct kib_pool { - struct list_head po_list; /* chain on pool list */ - struct list_head po_free_list; /* pre-allocated node */ - struct kib_poolset *po_owner; /* pool_set of this pool */ - unsigned long po_deadline; /* deadline of this pool */ - int po_allocated; /* # of elements in use */ - int po_failed; /* pool is created on failed HCA */ - int po_size; /* # of pre-allocated elements */ -}; - -struct kib_tx_poolset { - struct kib_poolset tps_poolset; /* pool-set */ - __u64 tps_next_tx_cookie; /* cookie of TX */ -}; - -struct kib_tx_pool { - struct kib_pool tpo_pool; /* pool */ - struct kib_hca_dev *tpo_hdev; /* device for this pool */ - struct kib_tx *tpo_tx_descs; /* all the tx descriptors */ - struct kib_pages *tpo_tx_pages; /* premapped tx msg pages */ -}; - -struct kib_fmr_poolset { - spinlock_t fps_lock; /* serialize */ - struct kib_net *fps_net; /* IB network */ - struct list_head fps_pool_list; /* FMR pool list */ - struct list_head fps_failed_pool_list;/* FMR pool list */ - __u64 fps_version; /* validity stamp */ - int fps_cpt; /* CPT id */ - int fps_pool_size; - int fps_flush_trigger; - int fps_cache; - int fps_increasing; /* is allocating new pool */ - unsigned long fps_next_retry; /* time stamp for retry if*/ - /* failed to allocate */ -}; - -struct kib_fast_reg_descriptor { /* For fast registration */ - struct list_head frd_list; - struct ib_send_wr frd_inv_wr; - struct ib_reg_wr frd_fastreg_wr; - struct ib_mr *frd_mr; - bool frd_valid; -}; - -struct kib_fmr_pool { - struct list_head fpo_list; /* chain on pool list */ - struct kib_hca_dev *fpo_hdev; /* device for this pool */ - struct kib_fmr_poolset *fpo_owner; /* owner of this pool */ - union { - struct { - struct ib_fmr_pool *fpo_fmr_pool; /* IB FMR pool */ - } fmr; - struct { /* For fast registration */ - struct list_head fpo_pool_list; - int fpo_pool_size; - } fast_reg; - }; - unsigned long fpo_deadline; /* deadline of this pool */ - int fpo_failed; /* fmr pool is failed */ - int fpo_map_count; /* # of mapped FMR */ - int fpo_is_fmr; -}; - -struct kib_fmr { - struct kib_fmr_pool *fmr_pool; /* pool of FMR */ - struct ib_pool_fmr *fmr_pfmr; /* IB pool fmr */ - struct kib_fast_reg_descriptor *fmr_frd; - u32 fmr_key; -}; - -struct kib_net { - struct list_head ibn_list; /* chain on struct kib_dev::ibd_nets */ - __u64 ibn_incarnation;/* my epoch */ - int ibn_init; /* initialisation state */ - int ibn_shutdown; /* shutting down? */ - - atomic_t ibn_npeers; /* # peers extant */ - atomic_t ibn_nconns; /* # connections extant */ - - struct kib_tx_poolset **ibn_tx_ps; /* tx pool-set */ - struct kib_fmr_poolset **ibn_fmr_ps; /* fmr pool-set */ - - struct kib_dev *ibn_dev; /* underlying IB device */ -}; - -#define KIB_THREAD_SHIFT 16 -#define KIB_THREAD_ID(cpt, tid) ((cpt) << KIB_THREAD_SHIFT | (tid)) -#define KIB_THREAD_CPT(id) ((id) >> KIB_THREAD_SHIFT) -#define KIB_THREAD_TID(id) ((id) & ((1UL << KIB_THREAD_SHIFT) - 1)) - -struct kib_sched_info { - spinlock_t ibs_lock; /* serialise */ - wait_queue_head_t ibs_waitq; /* schedulers sleep here */ - struct list_head ibs_conns; /* conns to check for rx completions */ - int ibs_nthreads; /* number of scheduler threads */ - int ibs_nthreads_max; /* max allowed scheduler threads */ - int ibs_cpt; /* CPT id */ -}; - -struct kib_data { - int kib_init; /* initialisation state */ - int kib_shutdown; /* shut down? */ - struct list_head kib_devs; /* IB devices extant */ - struct list_head kib_failed_devs; /* list head of failed devices */ - wait_queue_head_t kib_failover_waitq; /* schedulers sleep here */ - atomic_t kib_nthreads; /* # live threads */ - rwlock_t kib_global_lock; /* stabilize net/dev/peer/conn ops */ - struct list_head *kib_peers; /* hash table of all my known peers */ - int kib_peer_hash_size; /* size of kib_peers */ - void *kib_connd; /* the connd task (serialisation assertions) */ - struct list_head kib_connd_conns; /* connections to setup/teardown */ - struct list_head kib_connd_zombies; /* connections with zero refcount */ - /* connections to reconnect */ - struct list_head kib_reconn_list; - /* peers wait for reconnection */ - struct list_head kib_reconn_wait; - /** - * The second that peers are pulled out from \a kib_reconn_wait - * for reconnection. - */ - time64_t kib_reconn_sec; - - wait_queue_head_t kib_connd_waitq; /* connection daemon sleeps here */ - spinlock_t kib_connd_lock; /* serialise */ - struct ib_qp_attr kib_error_qpa; /* QP->ERROR */ - struct kib_sched_info **kib_scheds; /* percpt data for schedulers */ -}; - -#define IBLND_INIT_NOTHING 0 -#define IBLND_INIT_DATA 1 -#define IBLND_INIT_ALL 2 - -/************************************************************************ - * IB Wire message format. - * These are sent in sender's byte order (i.e. receiver flips). - */ - -struct kib_connparams { - __u16 ibcp_queue_depth; - __u16 ibcp_max_frags; - __u32 ibcp_max_msg_size; -} WIRE_ATTR; - -struct kib_immediate_msg { - struct lnet_hdr ibim_hdr; /* portals header */ - char ibim_payload[0]; /* piggy-backed payload */ -} WIRE_ATTR; - -struct kib_rdma_frag { - __u32 rf_nob; /* # bytes this frag */ - __u64 rf_addr; /* CAVEAT EMPTOR: misaligned!! */ -} WIRE_ATTR; - -struct kib_rdma_desc { - __u32 rd_key; /* local/remote key */ - __u32 rd_nfrags; /* # fragments */ - struct kib_rdma_frag rd_frags[0]; /* buffer frags */ -} WIRE_ATTR; - -struct kib_putreq_msg { - struct lnet_hdr ibprm_hdr; /* portals header */ - __u64 ibprm_cookie; /* opaque completion cookie */ -} WIRE_ATTR; - -struct kib_putack_msg { - __u64 ibpam_src_cookie; /* reflected completion cookie */ - __u64 ibpam_dst_cookie; /* opaque completion cookie */ - struct kib_rdma_desc ibpam_rd; /* sender's sink buffer */ -} WIRE_ATTR; - -struct kib_get_msg { - struct lnet_hdr ibgm_hdr; /* portals header */ - __u64 ibgm_cookie; /* opaque completion cookie */ - struct kib_rdma_desc ibgm_rd; /* rdma descriptor */ -} WIRE_ATTR; - -struct kib_completion_msg { - __u64 ibcm_cookie; /* opaque completion cookie */ - __s32 ibcm_status; /* < 0 failure: >= 0 length */ -} WIRE_ATTR; - -struct kib_msg { - /* First 2 fields fixed FOR ALL TIME */ - __u32 ibm_magic; /* I'm an ibnal message */ - __u16 ibm_version; /* this is my version number */ - - __u8 ibm_type; /* msg type */ - __u8 ibm_credits; /* returned credits */ - __u32 ibm_nob; /* # bytes in whole message */ - __u32 ibm_cksum; /* checksum (0 == no checksum) */ - __u64 ibm_srcnid; /* sender's NID */ - __u64 ibm_srcstamp; /* sender's incarnation */ - __u64 ibm_dstnid; /* destination's NID */ - __u64 ibm_dststamp; /* destination's incarnation */ - - union { - struct kib_connparams connparams; - struct kib_immediate_msg immediate; - struct kib_putreq_msg putreq; - struct kib_putack_msg putack; - struct kib_get_msg get; - struct kib_completion_msg completion; - } WIRE_ATTR ibm_u; -} WIRE_ATTR; - -#define IBLND_MSG_MAGIC LNET_PROTO_IB_MAGIC /* unique magic */ - -#define IBLND_MSG_VERSION_1 0x11 -#define IBLND_MSG_VERSION_2 0x12 -#define IBLND_MSG_VERSION IBLND_MSG_VERSION_2 - -#define IBLND_MSG_CONNREQ 0xc0 /* connection request */ -#define IBLND_MSG_CONNACK 0xc1 /* connection acknowledge */ -#define IBLND_MSG_NOOP 0xd0 /* nothing (just credits) */ -#define IBLND_MSG_IMMEDIATE 0xd1 /* immediate */ -#define IBLND_MSG_PUT_REQ 0xd2 /* putreq (src->sink) */ -#define IBLND_MSG_PUT_NAK 0xd3 /* completion (sink->src) */ -#define IBLND_MSG_PUT_ACK 0xd4 /* putack (sink->src) */ -#define IBLND_MSG_PUT_DONE 0xd5 /* completion (src->sink) */ -#define IBLND_MSG_GET_REQ 0xd6 /* getreq (sink->src) */ -#define IBLND_MSG_GET_DONE 0xd7 /* completion (src->sink: all OK) */ - -struct kib_rej { - __u32 ibr_magic; /* sender's magic */ - __u16 ibr_version; /* sender's version */ - __u8 ibr_why; /* reject reason */ - __u8 ibr_padding; /* padding */ - __u64 ibr_incarnation; /* incarnation of peer */ - struct kib_connparams ibr_cp; /* connection parameters */ -} WIRE_ATTR; - -/* connection rejection reasons */ -#define IBLND_REJECT_CONN_RACE 1 /* You lost connection race */ -#define IBLND_REJECT_NO_RESOURCES 2 /* Out of memory/conns etc */ -#define IBLND_REJECT_FATAL 3 /* Anything else */ -#define IBLND_REJECT_CONN_UNCOMPAT 4 /* incompatible version peer */ -#define IBLND_REJECT_CONN_STALE 5 /* stale peer */ -/* peer's rdma frags doesn't match mine */ -#define IBLND_REJECT_RDMA_FRAGS 6 -/* peer's msg queue size doesn't match mine */ -#define IBLND_REJECT_MSG_QUEUE_SIZE 7 - -/***********************************************************************/ - -struct kib_rx { /* receive message */ - struct list_head rx_list; /* queue for attention */ - struct kib_conn *rx_conn; /* owning conn */ - int rx_nob; /* # bytes received (-1 while posted) */ - enum ib_wc_status rx_status; /* completion status */ - struct kib_msg *rx_msg; /* message buffer (host vaddr) */ - __u64 rx_msgaddr; /* message buffer (I/O addr) */ - DECLARE_PCI_UNMAP_ADDR(rx_msgunmap); /* for dma_unmap_single() */ - struct ib_recv_wr rx_wrq; /* receive work item... */ - struct ib_sge rx_sge; /* ...and its memory */ -}; - -#define IBLND_POSTRX_DONT_POST 0 /* don't post */ -#define IBLND_POSTRX_NO_CREDIT 1 /* post: no credits */ -#define IBLND_POSTRX_PEER_CREDIT 2 /* post: give peer back 1 credit */ -#define IBLND_POSTRX_RSRVD_CREDIT 3 /* post: give self back 1 reserved credit */ - -struct kib_tx { /* transmit message */ - struct list_head tx_list; /* queue on idle_txs ibc_tx_queue etc. */ - struct kib_tx_pool *tx_pool; /* pool I'm from */ - struct kib_conn *tx_conn; /* owning conn */ - short tx_sending; /* # tx callbacks outstanding */ - short tx_queued; /* queued for sending */ - short tx_waiting; /* waiting for peer */ - int tx_status; /* LNET completion status */ - unsigned long tx_deadline; /* completion deadline */ - __u64 tx_cookie; /* completion cookie */ - struct lnet_msg *tx_lntmsg[2]; /* lnet msgs to finalize on completion */ - struct kib_msg *tx_msg; /* message buffer (host vaddr) */ - __u64 tx_msgaddr; /* message buffer (I/O addr) */ - DECLARE_PCI_UNMAP_ADDR(tx_msgunmap); /* for dma_unmap_single() */ - int tx_nwrq; /* # send work items */ - struct ib_rdma_wr *tx_wrq; /* send work items... */ - struct ib_sge *tx_sge; /* ...and their memory */ - struct kib_rdma_desc *tx_rd; /* rdma descriptor */ - int tx_nfrags; /* # entries in... */ - struct scatterlist *tx_frags; /* dma_map_sg descriptor */ - __u64 *tx_pages; /* rdma phys page addrs */ - struct kib_fmr fmr; /* FMR */ - int tx_dmadir; /* dma direction */ -}; - -struct kib_connvars { - struct kib_msg cv_msg; /* connection-in-progress variables */ -}; - -struct kib_conn { - struct kib_sched_info *ibc_sched; /* scheduler information */ - struct kib_peer *ibc_peer; /* owning peer */ - struct kib_hca_dev *ibc_hdev; /* HCA bound on */ - struct list_head ibc_list; /* stash on peer's conn list */ - struct list_head ibc_sched_list; /* schedule for attention */ - __u16 ibc_version; /* version of connection */ - /* reconnect later */ - __u16 ibc_reconnect:1; - __u64 ibc_incarnation; /* which instance of the peer */ - atomic_t ibc_refcount; /* # users */ - int ibc_state; /* what's happening */ - int ibc_nsends_posted; /* # uncompleted sends */ - int ibc_noops_posted; /* # uncompleted NOOPs */ - int ibc_credits; /* # credits I have */ - int ibc_outstanding_credits; /* # credits to return */ - int ibc_reserved_credits; /* # ACK/DONE msg credits */ - int ibc_comms_error; /* set on comms error */ - /* connections queue depth */ - __u16 ibc_queue_depth; - /* connections max frags */ - __u16 ibc_max_frags; - unsigned int ibc_nrx:16; /* receive buffers owned */ - unsigned int ibc_scheduled:1; /* scheduled for attention */ - unsigned int ibc_ready:1; /* CQ callback fired */ - unsigned long ibc_last_send; /* time of last send */ - struct list_head ibc_connd_list; /* link chain for */ - /* kiblnd_check_conns only */ - struct list_head ibc_early_rxs; /* rxs completed before ESTABLISHED */ - struct list_head ibc_tx_noops; /* IBLND_MSG_NOOPs for */ - /* IBLND_MSG_VERSION_1 */ - struct list_head ibc_tx_queue; /* sends that need a credit */ - struct list_head ibc_tx_queue_nocred; /* sends that don't need a */ - /* credit */ - struct list_head ibc_tx_queue_rsrvd; /* sends that need to */ - /* reserve an ACK/DONE msg */ - struct list_head ibc_active_txs; /* active tx awaiting completion */ - spinlock_t ibc_lock; /* serialise */ - struct kib_rx *ibc_rxs; /* the rx descs */ - struct kib_pages *ibc_rx_pages; /* premapped rx msg pages */ - - struct rdma_cm_id *ibc_cmid; /* CM id */ - struct ib_cq *ibc_cq; /* completion queue */ - - struct kib_connvars *ibc_connvars; /* in-progress connection state */ -}; - -#define IBLND_CONN_INIT 0 /* being initialised */ -#define IBLND_CONN_ACTIVE_CONNECT 1 /* active sending req */ -#define IBLND_CONN_PASSIVE_WAIT 2 /* passive waiting for rtu */ -#define IBLND_CONN_ESTABLISHED 3 /* connection established */ -#define IBLND_CONN_CLOSING 4 /* being closed */ -#define IBLND_CONN_DISCONNECTED 5 /* disconnected */ - -struct kib_peer { - struct list_head ibp_list; /* stash on global peer list */ - lnet_nid_t ibp_nid; /* who's on the other end(s) */ - struct lnet_ni *ibp_ni; /* LNet interface */ - struct list_head ibp_conns; /* all active connections */ - struct kib_conn *ibp_next_conn; /* next connection to send on for - * round robin */ - struct list_head ibp_tx_queue; /* msgs waiting for a conn */ - __u64 ibp_incarnation; /* incarnation of peer */ - /* when (in jiffies) I was last alive */ - unsigned long ibp_last_alive; - /* # users */ - atomic_t ibp_refcount; - /* version of peer */ - __u16 ibp_version; - /* current passive connection attempts */ - unsigned short ibp_accepting; - /* current active connection attempts */ - unsigned short ibp_connecting; - /* reconnect this peer later */ - unsigned char ibp_reconnecting; - /* counter of how many times we triggered a conn race */ - unsigned char ibp_races; - /* # consecutive reconnection attempts to this peer */ - unsigned int ibp_reconnected; - /* errno on closing this peer */ - int ibp_error; - /* max map_on_demand */ - __u16 ibp_max_frags; - /* max_peer_credits */ - __u16 ibp_queue_depth; -}; - -extern struct kib_data kiblnd_data; - -void kiblnd_hdev_destroy(struct kib_hca_dev *hdev); - -int kiblnd_msg_queue_size(int version, struct lnet_ni *ni); - -/* max # of fragments configured by user */ -static inline int -kiblnd_cfg_rdma_frags(struct lnet_ni *ni) -{ - struct lnet_ioctl_config_o2iblnd_tunables *tunables; - int mod; - - tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib; - mod = tunables->lnd_map_on_demand; - return mod ? mod : IBLND_MAX_RDMA_FRAGS >> IBLND_FRAG_SHIFT; -} - -static inline int -kiblnd_rdma_frags(int version, struct lnet_ni *ni) -{ - return version == IBLND_MSG_VERSION_1 ? - (IBLND_MAX_RDMA_FRAGS >> IBLND_FRAG_SHIFT) : - kiblnd_cfg_rdma_frags(ni); -} - -static inline int -kiblnd_concurrent_sends(int version, struct lnet_ni *ni) -{ - struct lnet_ioctl_config_o2iblnd_tunables *tunables; - int concurrent_sends; - - tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib; - concurrent_sends = tunables->lnd_concurrent_sends; - - if (version == IBLND_MSG_VERSION_1) { - if (concurrent_sends > IBLND_MSG_QUEUE_SIZE_V1 * 2) - return IBLND_MSG_QUEUE_SIZE_V1 * 2; - - if (concurrent_sends < IBLND_MSG_QUEUE_SIZE_V1 / 2) - return IBLND_MSG_QUEUE_SIZE_V1 / 2; - } - - return concurrent_sends; -} - -static inline void -kiblnd_hdev_addref_locked(struct kib_hca_dev *hdev) -{ - LASSERT(atomic_read(&hdev->ibh_ref) > 0); - atomic_inc(&hdev->ibh_ref); -} - -static inline void -kiblnd_hdev_decref(struct kib_hca_dev *hdev) -{ - LASSERT(atomic_read(&hdev->ibh_ref) > 0); - if (atomic_dec_and_test(&hdev->ibh_ref)) - kiblnd_hdev_destroy(hdev); -} - -static inline int -kiblnd_dev_can_failover(struct kib_dev *dev) -{ - if (!list_empty(&dev->ibd_fail_list)) /* already scheduled */ - return 0; - - if (!*kiblnd_tunables.kib_dev_failover) /* disabled */ - return 0; - - if (*kiblnd_tunables.kib_dev_failover > 1) /* force failover */ - return 1; - - return dev->ibd_can_failover; -} - -#define kiblnd_conn_addref(conn) \ -do { \ - CDEBUG(D_NET, "conn[%p] (%d)++\n", \ - (conn), atomic_read(&(conn)->ibc_refcount)); \ - atomic_inc(&(conn)->ibc_refcount); \ -} while (0) - -#define kiblnd_conn_decref(conn) \ -do { \ - unsigned long flags; \ - \ - CDEBUG(D_NET, "conn[%p] (%d)--\n", \ - (conn), atomic_read(&(conn)->ibc_refcount)); \ - LASSERT_ATOMIC_POS(&(conn)->ibc_refcount); \ - if (atomic_dec_and_test(&(conn)->ibc_refcount)) { \ - spin_lock_irqsave(&kiblnd_data.kib_connd_lock, flags); \ - list_add_tail(&(conn)->ibc_list, \ - &kiblnd_data.kib_connd_zombies); \ - wake_up(&kiblnd_data.kib_connd_waitq); \ - spin_unlock_irqrestore(&kiblnd_data.kib_connd_lock, flags);\ - } \ -} while (0) - -#define kiblnd_peer_addref(peer) \ -do { \ - CDEBUG(D_NET, "peer[%p] -> %s (%d)++\n", \ - (peer), libcfs_nid2str((peer)->ibp_nid), \ - atomic_read(&(peer)->ibp_refcount)); \ - atomic_inc(&(peer)->ibp_refcount); \ -} while (0) - -#define kiblnd_peer_decref(peer) \ -do { \ - CDEBUG(D_NET, "peer[%p] -> %s (%d)--\n", \ - (peer), libcfs_nid2str((peer)->ibp_nid), \ - atomic_read(&(peer)->ibp_refcount)); \ - LASSERT_ATOMIC_POS(&(peer)->ibp_refcount); \ - if (atomic_dec_and_test(&(peer)->ibp_refcount)) \ - kiblnd_destroy_peer(peer); \ -} while (0) - -static inline bool -kiblnd_peer_connecting(struct kib_peer *peer) -{ - return peer->ibp_connecting || - peer->ibp_reconnecting || - peer->ibp_accepting; -} - -static inline bool -kiblnd_peer_idle(struct kib_peer *peer) -{ - return !kiblnd_peer_connecting(peer) && list_empty(&peer->ibp_conns); -} - -static inline struct list_head * -kiblnd_nid2peerlist(lnet_nid_t nid) -{ - unsigned int hash = - ((unsigned int)nid) % kiblnd_data.kib_peer_hash_size; - - return &kiblnd_data.kib_peers[hash]; -} - -static inline int -kiblnd_peer_active(struct kib_peer *peer) -{ - /* Am I in the peer hash table? */ - return !list_empty(&peer->ibp_list); -} - -static inline struct kib_conn * -kiblnd_get_conn_locked(struct kib_peer *peer) -{ - struct list_head *next; - - LASSERT(!list_empty(&peer->ibp_conns)); - - /* Advance to next connection, be sure to skip the head node */ - if (!peer->ibp_next_conn || - peer->ibp_next_conn->ibc_list.next == &peer->ibp_conns) - next = peer->ibp_conns.next; - else - next = peer->ibp_next_conn->ibc_list.next; - peer->ibp_next_conn = list_entry(next, struct kib_conn, ibc_list); - - return peer->ibp_next_conn; -} - -static inline int -kiblnd_send_keepalive(struct kib_conn *conn) -{ - return (*kiblnd_tunables.kib_keepalive > 0) && - time_after(jiffies, conn->ibc_last_send + - msecs_to_jiffies(*kiblnd_tunables.kib_keepalive * - MSEC_PER_SEC)); -} - -static inline int -kiblnd_need_noop(struct kib_conn *conn) -{ - struct lnet_ioctl_config_o2iblnd_tunables *tunables; - struct lnet_ni *ni = conn->ibc_peer->ibp_ni; - - LASSERT(conn->ibc_state >= IBLND_CONN_ESTABLISHED); - tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib; - - if (conn->ibc_outstanding_credits < - IBLND_CREDITS_HIGHWATER(tunables, conn->ibc_version) && - !kiblnd_send_keepalive(conn)) - return 0; /* No need to send NOOP */ - - if (IBLND_OOB_CAPABLE(conn->ibc_version)) { - if (!list_empty(&conn->ibc_tx_queue_nocred)) - return 0; /* NOOP can be piggybacked */ - - /* No tx to piggyback NOOP onto or no credit to send a tx */ - return (list_empty(&conn->ibc_tx_queue) || - !conn->ibc_credits); - } - - if (!list_empty(&conn->ibc_tx_noops) || /* NOOP already queued */ - !list_empty(&conn->ibc_tx_queue_nocred) || /* piggyback NOOP */ - !conn->ibc_credits) /* no credit */ - return 0; - - if (conn->ibc_credits == 1 && /* last credit reserved for */ - !conn->ibc_outstanding_credits) /* giving back credits */ - return 0; - - /* No tx to piggyback NOOP onto or no credit to send a tx */ - return (list_empty(&conn->ibc_tx_queue) || conn->ibc_credits == 1); -} - -static inline void -kiblnd_abort_receives(struct kib_conn *conn) -{ - ib_modify_qp(conn->ibc_cmid->qp, - &kiblnd_data.kib_error_qpa, IB_QP_STATE); -} - -static inline const char * -kiblnd_queue2str(struct kib_conn *conn, struct list_head *q) -{ - if (q == &conn->ibc_tx_queue) - return "tx_queue"; - - if (q == &conn->ibc_tx_queue_rsrvd) - return "tx_queue_rsrvd"; - - if (q == &conn->ibc_tx_queue_nocred) - return "tx_queue_nocred"; - - if (q == &conn->ibc_active_txs) - return "active_txs"; - - LBUG(); - return NULL; -} - -/* CAVEAT EMPTOR: We rely on descriptor alignment to allow us to use the */ -/* lowest bits of the work request id to stash the work item type. */ - -#define IBLND_WID_INVAL 0 -#define IBLND_WID_TX 1 -#define IBLND_WID_RX 2 -#define IBLND_WID_RDMA 3 -#define IBLND_WID_MR 4 -#define IBLND_WID_MASK 7UL - -static inline __u64 -kiblnd_ptr2wreqid(void *ptr, int type) -{ - unsigned long lptr = (unsigned long)ptr; - - LASSERT(!(lptr & IBLND_WID_MASK)); - LASSERT(!(type & ~IBLND_WID_MASK)); - return (__u64)(lptr | type); -} - -static inline void * -kiblnd_wreqid2ptr(__u64 wreqid) -{ - return (void *)(((unsigned long)wreqid) & ~IBLND_WID_MASK); -} - -static inline int -kiblnd_wreqid2type(__u64 wreqid) -{ - return wreqid & IBLND_WID_MASK; -} - -static inline void -kiblnd_set_conn_state(struct kib_conn *conn, int state) -{ - conn->ibc_state = state; - mb(); -} - -static inline void -kiblnd_init_msg(struct kib_msg *msg, int type, int body_nob) -{ - msg->ibm_type = type; - msg->ibm_nob = offsetof(struct kib_msg, ibm_u) + body_nob; -} - -static inline int -kiblnd_rd_size(struct kib_rdma_desc *rd) -{ - int i; - int size; - - for (i = size = 0; i < rd->rd_nfrags; i++) - size += rd->rd_frags[i].rf_nob; - - return size; -} - -static inline __u64 -kiblnd_rd_frag_addr(struct kib_rdma_desc *rd, int index) -{ - return rd->rd_frags[index].rf_addr; -} - -static inline __u32 -kiblnd_rd_frag_size(struct kib_rdma_desc *rd, int index) -{ - return rd->rd_frags[index].rf_nob; -} - -static inline __u32 -kiblnd_rd_frag_key(struct kib_rdma_desc *rd, int index) -{ - return rd->rd_key; -} - -static inline int -kiblnd_rd_consume_frag(struct kib_rdma_desc *rd, int index, __u32 nob) -{ - if (nob < rd->rd_frags[index].rf_nob) { - rd->rd_frags[index].rf_addr += nob; - rd->rd_frags[index].rf_nob -= nob; - } else { - index++; - } - - return index; -} - -static inline int -kiblnd_rd_msg_size(struct kib_rdma_desc *rd, int msgtype, int n) -{ - LASSERT(msgtype == IBLND_MSG_GET_REQ || - msgtype == IBLND_MSG_PUT_ACK); - - return msgtype == IBLND_MSG_GET_REQ ? - offsetof(struct kib_get_msg, ibgm_rd.rd_frags[n]) : - offsetof(struct kib_putack_msg, ibpam_rd.rd_frags[n]); -} - -static inline __u64 -kiblnd_dma_mapping_error(struct ib_device *dev, u64 dma_addr) -{ - return ib_dma_mapping_error(dev, dma_addr); -} - -static inline __u64 kiblnd_dma_map_single(struct ib_device *dev, - void *msg, size_t size, - enum dma_data_direction direction) -{ - return ib_dma_map_single(dev, msg, size, direction); -} - -static inline void kiblnd_dma_unmap_single(struct ib_device *dev, - __u64 addr, size_t size, - enum dma_data_direction direction) -{ - ib_dma_unmap_single(dev, addr, size, direction); -} - -#define KIBLND_UNMAP_ADDR_SET(p, m, a) do {} while (0) -#define KIBLND_UNMAP_ADDR(p, m, a) (a) - -static inline int kiblnd_dma_map_sg(struct ib_device *dev, - struct scatterlist *sg, int nents, - enum dma_data_direction direction) -{ - return ib_dma_map_sg(dev, sg, nents, direction); -} - -static inline void kiblnd_dma_unmap_sg(struct ib_device *dev, - struct scatterlist *sg, int nents, - enum dma_data_direction direction) -{ - ib_dma_unmap_sg(dev, sg, nents, direction); -} - -static inline __u64 kiblnd_sg_dma_address(struct ib_device *dev, - struct scatterlist *sg) -{ - return ib_sg_dma_address(dev, sg); -} - -static inline unsigned int kiblnd_sg_dma_len(struct ib_device *dev, - struct scatterlist *sg) -{ - return ib_sg_dma_len(dev, sg); -} - -/* XXX We use KIBLND_CONN_PARAM(e) as writable buffer, it's not strictly */ -/* right because OFED1.2 defines it as const, to use it we have to add */ -/* (void *) cast to overcome "const" */ - -#define KIBLND_CONN_PARAM(e) ((e)->param.conn.private_data) -#define KIBLND_CONN_PARAM_LEN(e) ((e)->param.conn.private_data_len) - -void kiblnd_map_rx_descs(struct kib_conn *conn); -void kiblnd_unmap_rx_descs(struct kib_conn *conn); -void kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node); -struct list_head *kiblnd_pool_alloc_node(struct kib_poolset *ps); - -int kiblnd_fmr_pool_map(struct kib_fmr_poolset *fps, struct kib_tx *tx, - struct kib_rdma_desc *rd, __u32 nob, __u64 iov, - struct kib_fmr *fmr); -void kiblnd_fmr_pool_unmap(struct kib_fmr *fmr, int status); - -int kiblnd_tunables_setup(struct lnet_ni *ni); -void kiblnd_tunables_init(void); - -int kiblnd_connd(void *arg); -int kiblnd_scheduler(void *arg); -int kiblnd_thread_start(int (*fn)(void *arg), void *arg, char *name); -int kiblnd_failover_thread(void *arg); - -int kiblnd_alloc_pages(struct kib_pages **pp, int cpt, int npages); - -int kiblnd_cm_callback(struct rdma_cm_id *cmid, - struct rdma_cm_event *event); -int kiblnd_translate_mtu(int value); - -int kiblnd_dev_failover(struct kib_dev *dev); -int kiblnd_create_peer(struct lnet_ni *ni, struct kib_peer **peerp, - lnet_nid_t nid); -void kiblnd_destroy_peer(struct kib_peer *peer); -bool kiblnd_reconnect_peer(struct kib_peer *peer); -void kiblnd_destroy_dev(struct kib_dev *dev); -void kiblnd_unlink_peer_locked(struct kib_peer *peer); -struct kib_peer *kiblnd_find_peer_locked(lnet_nid_t nid); -int kiblnd_close_stale_conns_locked(struct kib_peer *peer, - int version, __u64 incarnation); -int kiblnd_close_peer_conns_locked(struct kib_peer *peer, int why); - -struct kib_conn *kiblnd_create_conn(struct kib_peer *peer, - struct rdma_cm_id *cmid, - int state, int version); -void kiblnd_destroy_conn(struct kib_conn *conn); -void kiblnd_close_conn(struct kib_conn *conn, int error); -void kiblnd_close_conn_locked(struct kib_conn *conn, int error); - -void kiblnd_launch_tx(struct lnet_ni *ni, struct kib_tx *tx, lnet_nid_t nid); -void kiblnd_txlist_done(struct lnet_ni *ni, struct list_head *txlist, - int status); - -void kiblnd_qp_event(struct ib_event *event, void *arg); -void kiblnd_cq_event(struct ib_event *event, void *arg); -void kiblnd_cq_completion(struct ib_cq *cq, void *arg); - -void kiblnd_pack_msg(struct lnet_ni *ni, struct kib_msg *msg, int version, - int credits, lnet_nid_t dstnid, __u64 dststamp); -int kiblnd_unpack_msg(struct kib_msg *msg, int nob); -int kiblnd_post_rx(struct kib_rx *rx, int credit); - -int kiblnd_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg); -int kiblnd_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg, - int delayed, struct iov_iter *to, unsigned int rlen); |