Viewing: gnilnd.h
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2004 Cluster File Systems, Inc.
*
* Copyright (C) 2009-2012 Cray, Inc.
*
* Copyright (c) 2014, 2016, Intel Corporation.
*/
/* This file is part of Lustre, http://www.lustre.org.
*
* Derived from work by: Eric Barton <eric@bartonsoftware.com>
* Author: Nic Henke <nic@cray.com>
* Author: James Shimek <jshimek@cray.com>
*/
#ifndef _GNILND_GNILND_H_
#define _GNILND_GNILND_H_
#define DEBUG_SUBSYSTEM S_LND
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/errno.h>
#ifdef HAVE_LINUX_KERNEL_LOCK
#include <linux/smp_lock.h>
#endif
#include <linux/unistd.h>
#include <linux/uio.h>
#include <linux/time.h>
#include <asm/timex.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>
#include <linux/kthread.h>
#include <linux/nmi.h>
#include <net/sock.h>
#include <linux/in.h>
#include <linux/nmi.h>
#include <lustre_compat/linux/timer.h>
#include <linux/libcfs/libcfs_fail.h>
#include <linux/lnet/lib-lnet.h>
#include <gni_pub.h>
static inline time_t cfs_duration_sec(long duration_jiffies)
{
return jiffies_to_msecs(duration_jiffies) / MSEC_PER_SEC;
}
#ifdef CONFIG_SLAB
#define GNILND_MBOX_SIZE KMALLOC_MAX_SIZE
#else
#define GNILND_SHIFT_HIGH ((MAX_ORDER + PAGE_SHIFT - 1) <= 25 ? \
(MAX_ORDER + PAGE_SHIFT - 1) : 25)
#define GNILND_SHIFT_MAX GNILND_SHIFT_HIGH
#define GNILND_MBOX_SIZE (1UL << GNILND_SHIFT_MAX)
#endif
/* tunables determined at compile time */
#define GNILND_MIN_TIMEOUT 5 /* minimum timeout interval (seconds) */
#define GNILND_TO2KA(t) (((t)-1)/2) /* timeout -> keepalive interval */
#define GNILND_MIN_RECONNECT_TO (GNILND_BASE_TIMEOUT/4)
#define GNILND_MAX_RECONNECT_TO GNILND_BASE_TIMEOUT
#define GNILND_HARDWARE_TIMEOUT 15 /* maximum time for data to travel between nodes */
#define GNILND_MDD_TIMEOUT 15 /* MDD hold timeout in minutes */
#define GNILND_SCHED_TIMEOUT 1
#define GNILND_DGRAM_TIMEOUT 2
#define GNILND_FAST_MAPPING_TRY \
*kgnilnd_tunables.kgn_max_retransmits /* maximum number to attempt mapping of a tx */
#define GNILND_MAP_RETRY_RATE 1 /* interval between mapping attempts in jiffies */
/* map failure timeout */
#define GNILND_MAP_TIMEOUT \
(cfs_time_seconds(*kgnilnd_tunables.kgn_timeout * \
*kgnilnd_tunables.kgn_timeout))
/* Should we use the no_retry flag with vzalloc */
#define GNILND_VZALLOC_RETRY 0
/* reaper thread wakup interval */
#define GNILND_REAPER_THREAD_WAKE 1
/* reaper thread checks each conn NCHECKS time every kgnilnd_data.kgn_new_min_timeout */
#define GNILND_REAPER_NCHECKS 4
/* fixed constants */
#define GNILND_MAXDEVS 1 /* max # of GNI devices currently supported */
#define GNILND_MBOX_CREDITS 256 /* number of credits per mailbox */
#define GNILND_CONN_MAGIC 0xa100f /* magic value for verifying connection validity */
/* checksum values */
#define GNILND_CHECKSUM_OFF 0 /* checksum turned off */
#define GNILND_CHECKSUM_SMSG_HEADER 1 /* Only checksum SMSG header */
#define GNILND_CHECKSUM_SMSG 2 /* checksum entire SMSG packet */
#define GNILND_CHECKSUM_SMSG_BTE 3 /* Full checksum support */
/* tune down some COMPUTE options as they won't see the same number of connections and
* don't need the throughput of multiple threads by default */
#if defined(CONFIG_CRAY_COMPUTE)
#ifdef CONFIG_MK1OM
#define GNILND_SCHED_THREADS 2 /* default # of kgnilnd_scheduler threads */
#else
#define GNILND_SCHED_THREADS 1 /* default # of kgnilnd_scheduler threads */
#endif
#define GNILND_FMABLK 64 /* default number of mboxes per fmablk */
#define GNILND_SCHED_NICE 0 /* default nice value for scheduler threads */
#define GNILND_COMPUTE 1 /* compute image */
#define GNILND_FAST_RECONNECT 1 /* Fast Reconnect option */
#define GNILND_DEFAULT_CREDITS 64 /* Default number of simultaneous transmits */
#else
#define GNILND_FMABLK 1024 /* default number of mboxes per fmablk */
#define GNILND_SCHED_NICE -20 /* default nice value for scheduler threads */
#define GNILND_COMPUTE 0 /* service image */
#define GNILND_FAST_RECONNECT 0 /* Fast Reconnect option */
#define GNILND_DEFAULT_CREDITS 256 /* Default number of simultaneous transmits */
#endif
/* EXTRA_BITS are there to allow us to hide NOOP/CLOSE and anything else out of band */
#define GNILND_EXTRA_BITS 1
/* maximum number of conns & bits for cqid in the SMSG event data */
#define GNILND_CQID_NBITS (21 - GNILND_EXTRA_BITS)
#define GNILND_MSGID_TX_NBITS (32 - GNILND_CQID_NBITS)
#define GNILND_MAX_CQID (1 << GNILND_CQID_NBITS)
#define GNILND_MAX_MSG_ID (1 << GNILND_MSGID_TX_NBITS)
#define GNILND_MAX_MSG_SIZE (*kgnilnd_tunables.kgn_max_immediate + sizeof(kgn_msg_t))
/* need sane upper bound to limit copy overhead */
#define GNILND_MAX_IMMEDIATE (64<<10)
/* allow for 4M transfers over gni. Note 2.5M used by DVS */
#define GNILND_MAX_IOV 1024
/* Max number of connections to keep in purgatory per peer */
#define GNILND_PURGATORY_MAX 5
/* Closing, don't put in purgatory */
#define GNILND_NOPURG 222
/* payload size to add to the base mailbox size
* This is subtracting 2 from the concurrent_sends as 4 messages are included in the size
* gni_smsg_buff_size_needed calculates, the MAX_PAYLOAD is added to
* the calculation return from that function.*/
#define GNILND_MBOX_PAYLOAD \
(GNILND_MAX_MSG_SIZE * \
((*kgnilnd_tunables.kgn_concurrent_sends - 2) * 2));
/* timeout -> deadman timer for kgni mdd holds */
#define GNILND_TIMEOUT2DEADMAN ((*kgnilnd_tunables.kgn_mdd_timeout) * 1000 * 60)
/* timeout for failing sends in t is in jiffies*/
#define GNILND_TIMEOUTRX(t) (t + cfs_time_seconds(*kgnilnd_tunables.kgn_hardware_timeout))
/* time when to release from purgatory in the reaper thread in jiffies */
#define GNILND_PURG_RELEASE(t) (GNILND_TIMEOUTRX(t) * 3)
/* Macro for finding last_rx 2 datapoints are compared
* and the most recent one in jiffies is returned.
*/
#define GNILND_LASTRX(conn) (time_after(conn->gnc_last_rx, conn->gnc_last_rx_cq) \
? conn->gnc_last_rx : conn->gnc_last_rx_cq)
/* fmablk registration failures timeout before failing node */
#define GNILND_REGFAILTO_DISABLE -1
/************************************************************************
* Enum, flag and tag data
*/
#define GNILND_INIT_NOTHING 0
#define GNILND_INIT_DATA 1
#define GNILND_INIT_ALL 2
/* If you change the ordering away from MAPPED = UNMAPPED + 1, things break */
#define GNILND_BUF_NONE 0 /* buffer type not set */
#define GNILND_BUF_IMMEDIATE 1 /* immediate data */
#define GNILND_BUF_IMMEDIATE_KIOV 2 /* immediate data */
#define GNILND_BUF_PHYS_UNMAPPED 3 /* physical: not mapped yet */
#define GNILND_BUF_PHYS_MAPPED 4 /* physical: mapped already */
#define GNILND_TX_WAITING_REPLY (1<<1) /* expecting to receive reply */
#define GNILND_TX_WAITING_COMPLETION (1<<2) /* waiting for smsg_send to complete */
#define GNILND_TX_PENDING_RDMA (1<<3) /* RDMA transaction pending until we get prev. completion */
#define GNILND_TX_QUIET_ERROR (1<<4) /* don't print error on tx_done */
#define GNILND_TX_FAIL_SMSG (1<<5) /* pass down error injection for SMSG fail */
/* stash above max CQID to avoid any collision */
#define GNILND_MSGID_NOOP (GNILND_MAX_CQID + 128)
#define GNILND_MSGID_CLOSE (GNILND_MSGID_NOOP + 1)
/* kgn_msg_t::gnm_type */
#define GNILND_MSG_NONE 0x00 /* illegal message */
#define GNILND_MSG_NOOP 0x01 /* empty gnm_u (keepalive) */
#define GNILND_MSG_IMMEDIATE 0x02 /* gnm_u.immediate */
#define GNILND_MSG_PUT_REQ 0x03 /* gnm_u.putreq (src->sink) */
#define GNILND_MSG_PUT_NAK 0x04 /* gnm_u.completion (no PUT match: sink->src) */
#define GNILND_MSG_PUT_ACK 0x05 /* gnm_u.putack (PUT matched: sink->src) */
#define GNILND_MSG_PUT_DONE 0x06 /* gnm_u.completion (src->sink) */
#define GNILND_MSG_GET_REQ 0x07 /* gnm_u.get (sink->src) */
#define GNILND_MSG_GET_NAK 0x08 /* gnm_u.completion (no GET match: src->sink) */
#define GNILND_MSG_GET_DONE 0x09 /* gnm_u.completion (src->sink) */
#define GNILND_MSG_CLOSE 0x0a /* empty gnm_u */
#define GNILND_MSG_PUT_REQ_REV 0x0b /* gnm_u.get (src->sink) */
#define GNILND_MSG_PUT_DONE_REV 0x0c /* gnm_u.completion (sink->src) */
#define GNILND_MSG_PUT_NAK_REV 0x0d /* gnm_u.completion (no PUT match: sink->src) */
#define GNILND_MSG_GET_REQ_REV 0x0e /* gnm_u.get (sink->src ) */
#define GNILND_MSG_GET_ACK_REV 0x0f /* gnm_u.getack (GET matched: src->sink) */
#define GNILND_MSG_GET_DONE_REV 0x10 /* gnm_u.completion (sink -> src) */
#define GNILND_MSG_GET_NAK_REV 0x11 /* gnm_u.completeion (no GET match: sink -> src) */
/* defines for gnc_*scheduled states */
#define GNILND_CONN_IDLE 0
#define GNILND_CONN_SCHED 1
#define GNILND_CONN_WANTS_SCHED 2
#define GNILND_CONN_PROCESS 3
#define GNILND_DEV_IDLE 0
#define GNILND_DEV_IRQ 1
#define GNILND_DEV_LOOP 2
#define GNILND_DGRAM_IDLE 0
#define GNILND_DGRAM_SCHED 1
#define GNILND_DGRAM_PROCESS 2
#define GNILND_PEER_IDLE 0
#define GNILND_PEER_CONNECT 1
#define GNILND_PEER_POSTING 2
#define GNILND_PEER_POSTED 3
#define GNILND_PEER_NEEDS_DEATH 4
#define GNILND_PEER_KILL 5
/* for gnc_close_recvd */
#define GNILND_CLOSE_RX 1
#define GNILND_CLOSE_INJECT1 2
#define GNILND_CLOSE_INJECT2 3
#define GNILND_CLOSE_EARLY 4
/* defines for why quiesce trigger set */
#define GNILND_QUIESCE_IDLE 0
#define GNILND_QUIESCE_ADMIN 1
#define GNILND_QUIESCE_RESET 2
#define GNILND_QUIESCE_HW_QUIESCE 3
#define GNILND_PEER_CLEAN 0
#define GNILND_PEER_PERSISTING 1
#define GNILND_DEL_CONN 0
#define GNILND_DEL_PEER 1
#define GNILND_CLEAR_PURGATORY 2
#define GNILND_PEER_UP 0
#define GNILND_PEER_DOWN 1
#define GNILND_PEER_TIMED_OUT 2
#define GNILND_PEER_UNKNOWN 3
/* defines for reverse RDMA states */
#define GNILND_REVERSE_NONE 0
#define GNILND_REVERSE_GET 1
#define GNILND_REVERSE_PUT 2
#define GNILND_REVERSE_BOTH (GNILND_REVERSE_GET | GNILND_REVERSE_PUT)
typedef enum kgn_fmablk_state {
GNILND_FMABLK_IDLE = 0, /* is allocated or ready to be freed */
GNILND_FMABLK_PHYS, /* allocated out of slab of physical memory */
GNILND_FMABLK_VIRT, /* 'standard' vmalloc hunk */
GNILND_FMABLK_FREED, /* after free */
} kgn_fmablk_state_t;
typedef enum kgn_tx_list_state {
GNILND_TX_IDLE = 0, /* TX is on the idle list, kgn_idle_txs */
GNILND_TX_ALLOCD, /* TX has been alloced (off of idle), could be in any state transition */
GNILND_TX_PEERQ, /* TX on peer->gnp_tx_queue (no live conn) */
GNILND_TX_MAPQ, /* TX on dev:gnd_map_tx for buffer mapping */
GNILND_TX_FMAQ, /* TX waiting to be send on conn FMA */
GNILND_TX_LIVE_FMAQ, /* TX live on the FMA wire, waiting for completion or reply */
GNILND_TX_RDMAQ, /* TX waiting to send FMA confirmation to auth RDMA PUT */
GNILND_TX_LIVE_RDMAQ, /* TX live on the RDMA wire, waiting for completion */
GNILND_TX_DYING, /* TX got caught on MAPQ or RDMAQ while conn was closing, needs someone to call tx_done */
GNILND_TX_FREED /* TX is free! */
} kgn_tx_list_state_t;
typedef enum kgn_conn_state {
/* don't start @ 0 - prevent memset(0) badness */
GNILND_CONN_DUMMY = 0,
GNILND_CONN_LISTEN,
GNILND_CONN_CONNECTING,
GNILND_CONN_ESTABLISHED,
GNILND_CONN_CLOSING,
GNILND_CONN_CLOSED,
GNILND_CONN_DONE,
GNILND_CONN_DESTROY_EP
} kgn_conn_state_t;
/* changing these requires a change to GNILND_CONNREQ_VERSION and
* will result in dropped packets instead of NAKs. Adding to this is
* acceptable without changing the CONNREQ_VERSION, but code should
* be ready to handle NAKs on version mismatch */
typedef enum kgn_connreq_type {
GNILND_CONNREQ_REQ = 1, /* how YOU doin' ? */
GNILND_CONNREQ_NAK, /* NO soup for you! */
GNILND_CONNREQ_CLOSE, /* we should see other people */
} kgn_connreq_type_t;
typedef enum kgn_dgram_state {
/* don't use 0 to avoid thinking a memset of zero is valid data */
GNILND_DGRAM_USED = 1,
GNILND_DGRAM_POSTING,
GNILND_DGRAM_POSTED,
GNILND_DGRAM_PROCESSING,
GNILND_DGRAM_CANCELED,
GNILND_DGRAM_DONE,
} kgn_dgram_state_t;
typedef enum kgn_dgram_type {
GNILND_DGRAM_REQ = 1, /* how YOU doin' ? */
GNILND_DGRAM_WC_REQ, /* you talkin' to ME? */
GNILND_DGRAM_NAK, /* NO soup for you! */
GNILND_DGRAM_CLOSE, /* we should see other people */
} kgn_dgram_type_t;
/************************************************************************
* Wire message structs. These are sent in sender's byte order
* (i.e. receiver checks magic and flips if required).
*/
#define GNILND_MSG_MAGIC LNET_PROTO_GNI_MAGIC /* unique magic */
#define GNILND_DGRAM_MAGIC 0x0DDBA11
/* kgn_msg_t - FMA/SMSG wire struct
* v2:
* * added checksum to FMA
* * moved seq before paylod
* * __packed added for alignment
* v3:
* * added gnm_payload_len for FMA payload size
* v4:
* * add gncm_retval to completion, allow return code transmission on RDMA NAKs
* v5:
* * changed how CQID and TX ids are assigned
* v6:
* * added retval on CLOSE
* v7:
* * added payload checksumming
* v8:
* * reworked checksumming a bit, changed payload checksums
*/
#define GNILND_MSG_VERSION 8
/* kgn_connreq_t connection request datagram wire struct
* v2:
* * added NAKs
*/
#define GNILND_CONNREQ_VERSION 2
typedef struct kgn_gniparams {
__u32 gnpr_host_id; /* ph. host ID of the NIC */
__u32 gnpr_cqid; /* cqid I want peer to use when sending events to me */
gni_smsg_attr_t gnpr_smsg_attr; /* my short msg. attributes */
} __packed kgn_gniparams_t;
typedef struct kgn_nak_data {
__s32 gnnd_errno; /* errno reason for NAK */
} __packed kgn_nak_data_t;
/* the first bits of the connreq struct CANNOT CHANGE FORM EVER
* without breaking the ability for us to properly NAK someone */
typedef struct kgn_connreq { /* connection request/response */
__u32 gncr_magic; /* I'm an gnilnd connreq */
__u32 gncr_cksum; /* checksum (0 == disabled) */
__u16 gncr_type; /* REQ, NAK, etc */
__u16 gncr_version; /* this is my version number */
__u32 gncr_timeout; /* sender's timeout */
__u64 gncr_srcnid; /* sender's NID */
__u64 gncr_dstnid; /* who sender expects to listen */
__u64 gncr_peerstamp; /* sender's instance stamp */
__u64 gncr_connstamp; /* sender's connection stamp */
/* everything before this needs to stay static, adding after should
* result in a change to GNILND_CONNREQ_VERSION */
union {
kgn_gniparams_t gncr_gnparams; /* sender's endpoint info */
kgn_nak_data_t gncr_nakdata; /* data (rc, etc) for NAK */
};
} __packed kgn_connreq_t;
typedef struct {
gni_mem_handle_t gnrd_key;
__u64 gnrd_addr;
__u32 gnrd_nob;
} __packed kgn_rdma_desc_t;
typedef struct {
struct lnet_hdr_nid4 gnim_hdr; /* LNet header */
/* LNet payload is in FMA "Message Data" */
} __packed kgn_immediate_msg_t;
typedef struct {
struct lnet_hdr_nid4 gnprm_hdr; /* LNet header */
__u64 gnprm_cookie; /* opaque completion cookie */
} __packed kgn_putreq_msg_t;
typedef struct {
__u64 gnpam_src_cookie; /* reflected completion cookie */
__u64 gnpam_dst_cookie; /* opaque completion cookie */
__u16 gnpam_payload_cksum; /* checksum for get msg */
kgn_rdma_desc_t gnpam_desc; /* sender's sink buffer */
} __packed kgn_putack_msg_t;
typedef struct {
struct lnet_hdr_nid4 gngm_hdr; /* LNet header */
__u64 gngm_cookie; /* opaque completion cookie */
__u16 gngm_payload_cksum; /* checksum for put msg */
kgn_rdma_desc_t gngm_desc; /* sender's sink buffer */
} __packed kgn_get_msg_t;
typedef struct {
int gncm_retval; /* error on NAK, size on REQ */
__u64 gncm_cookie; /* reflected completion cookie */
} __packed kgn_completion_msg_t;
typedef struct { /* NB must fit in FMA "Prefix" */
__u32 gnm_magic; /* I'm an gni message */
__u16 gnm_version; /* this is my version number */
__u16 gnm_type; /* msg type */
__u64 gnm_srcnid; /* sender's NID */
__u64 gnm_connstamp; /* sender's connection stamp */
__u32 gnm_seq; /* incrementing sequence number */
__u16 gnm_cksum; /* checksum (0 == no checksum ) */
__u16 gnm_payload_cksum; /* payload checksum (0 == no checksum ) */
__u32 gnm_payload_len; /* size of the FMA payload sent */
union {
kgn_immediate_msg_t immediate;
kgn_putreq_msg_t putreq;
kgn_putack_msg_t putack;
kgn_get_msg_t get;
kgn_completion_msg_t completion;
} gnm_u;
} __packed kgn_msg_t;
/************************************************************************
* runtime tunable data
*/
typedef struct kgn_tunables {
int *kgn_min_reconnect_interval; /* connreq starting timeout & retransmit interval */
int *kgn_max_reconnect_interval; /* ...exponentially increasing to this */
int *kgn_credits; /* # concurrent sends */
int *kgn_fma_cq_size; /* # entries in receive CQ */
int *kgn_peer_credits; /* # LNet peer credits */
int *kgn_concurrent_sends; /* max # of max_immediate in mbox */
int *kgn_timeout; /* comms timeout (seconds) */
int *kgn_max_immediate; /* immediate payload breakpoint */
int *kgn_checksum; /* checksum data */
int *kgn_checksum_dump; /* dump raw data to D_INFO log when checksumming */
int *kgn_bte_put_dlvr_mode; /* BTE Put delivery mode */
int *kgn_bte_get_dlvr_mode; /* BTE Get delivery mode */
int *kgn_bte_relaxed_ordering; /* relaxed ordering (PASSPW) on BTE transfers */
int *kgn_ptag; /* PTAG for cdm_create */
int *kgn_pkey; /* PKEY for cdm_create */
int *kgn_max_retransmits; /* max number of FMA retransmits before entering delay list */
int *kgn_nwildcard; /* # wildcard per net to post */
int *kgn_nice; /* nice value for kgnilnd threads */
int *kgn_rdmaq_intervals; /* # intervals per second for rdmaq throttle */
int *kgn_loops; /* # of loops sched does before flush/heartbeat tickle */
int *kgn_peer_hash_size; /* size of kgn_peers */
int *kgn_peer_health; /* enable/disable peer health */
int *kgn_peer_timeout; /* Override of the default peer_timeout used by peer_health */
int *kgn_vmap_cksum; /* enable/disable vmap of kiov checksums */
int *kgn_mbox_per_block; /* mailboxes per fmablk */
int *kgn_nphys_mbox; /* # mailboxes to preallocate with physical memory */
int *kgn_mbox_credits; /* max credits per fma */
int *kgn_sched_threads; /* number of kgnilnd_scheduler threads */
int *kgn_net_hash_size; /* size of kgn_net_ht */
int *kgn_hardware_timeout; /* max time for a message to get across the network */
int *kgn_mdd_timeout; /* max time for ghal to hold an mdd in minutes */
int *kgn_sched_timeout; /* max time for scheduler to run before yielding */
int *kgn_dgram_timeout; /* max time for dgram mover to run before scheduling */
int *kgn_sched_nice; /* nice value for kgnilnd scheduler threads */
int *kgn_reverse_rdma; /* Reverse RDMA setting */
int *kgn_eager_credits; /* allocated eager buffers */
int *kgn_fast_reconn; /* fast reconnection on conn timeout */
int *kgn_efault_lbug; /* LBUG on receiving an EFAULT */
int *kgn_max_purgatory; /* # conns/peer to keep in purgatory */
int *kgn_reg_fail_timeout; /* registration failure timeout */
int *kgn_thread_affinity; /* bind scheduler threads to cpus */
int *kgn_to_reconn_disable;/* disable reconnect after timeout */
int *kgn_thread_safe; /* use thread safe kgni API */
int *kgn_vzalloc_noretry; /* Should we pass the noretry flag */
} kgn_tunables_t;
typedef struct kgn_mbox_info {
lnet_nid_t mbx_prev_nid;
lnet_nid_t mbx_prev_purg_nid;
unsigned long mbx_create_conn_memset;
unsigned long mbx_add_purgatory;
unsigned long mbx_detach_of_purgatory;
unsigned long mbx_release_from_purgatory;
unsigned long mbx_release_purg_active_dgram;
int mbx_nallocs;
int mbx_nallocs_total;
} kgn_mbox_info_t;
typedef struct kgn_fma_memblock {
struct list_head gnm_bufflist; /* memblock is part of device's gnd_fma_buffs */
kgn_fmablk_state_t gnm_state; /* how this memory allocated & state of it */
int gnm_hold_timeout; /* hold_timeout if used at unmap time */
int gnm_num_mboxs; /* total mboxes allocated */
int gnm_avail_mboxs; /* number of available mailboxes in the block */
int gnm_held_mboxs; /* number of purgatory held mailboxes */
int gnm_mbox_size; /* size of the single mailbox */
int gnm_next_avail_mbox; /* next available mailbox */
long gnm_max_timeout; /* max timeout for possible purgatory hold */
unsigned int gnm_blk_size; /* how big is our hunk o memory ? */
void *gnm_block; /* pointer to mem. block */
gni_mem_handle_t gnm_hndl; /* mem. handle of the block */
unsigned long *gnm_bit_array; /* bit array tracking allocation of mailboxes */
kgn_mbox_info_t *gnm_mbox_info; /* array of mbox_information about each mbox */
} kgn_fma_memblock_t;
typedef struct kgn_device {
gni_nic_handle_t gnd_handle; /* device handle */
gni_cdm_handle_t gnd_domain; /* GNI communication domain */
gni_err_handle_t gnd_err_handle; /* device error handle */
unsigned long gnd_sched_alive; /* scheduler thread alive stamp */
gni_cq_handle_t gnd_rcv_fma_cqh; /* FMA rcv. completion queue handle */
gni_cq_handle_t gnd_snd_rdma_cqh; /* rdma send completion queue handle */
gni_cq_handle_t gnd_snd_fma_cqh; /* rdma send completion queue handle */
struct mutex gnd_cq_mutex; /* CQ access serialization */
__u32 gnd_host_id; /* ph. host ID of the NIC */
int gnd_id; /* device id, also index in kgn_devices */
__u32 gnd_nid; /* ph host ID translated to NID */
struct list_head gnd_fma_buffs; /* list of FMA memory blocks */
struct mutex gnd_fmablk_mutex; /* mutex for FMA block memory alloc/free */
spinlock_t gnd_fmablk_lock; /* lock for mbox alloc/release */
atomic_t gnd_nfmablk; /* # of fmablk live */
atomic_t gnd_fmablk_vers; /* gnd_fma_bufs stamp */
atomic_t gnd_neps; /* # EP allocated to conns */
short gnd_ready; /* stuff to do in scheduler thread */
struct list_head gnd_ready_conns; /* connections ready to tx/rx */
struct list_head gnd_delay_conns; /* connections in need of dla/or smsg credits */
struct list_head gnd_map_tx; /* TX: needing buffer mapping */
wait_queue_head_t gnd_waitq; /* scheduler wakeup */
spinlock_t gnd_lock; /* serialise gnd_ready_conns */
struct list_head gnd_connd_peers; /* peers waiting for a connection */
spinlock_t gnd_connd_lock; /* serialise connd_peers */
wait_queue_head_t gnd_dgram_waitq; /* dgram_mover thread wakeup */
wait_queue_head_t gnd_dgping_waitq; /* dgram thread ping-pong */
int gnd_dgram_ready; /* dgrams need movin' */
struct list_head *gnd_dgrams; /* nid hash to dgrams */
atomic_t gnd_ndgrams; /* # dgrams extant */
atomic_t gnd_nwcdgrams; /* # wildcard dgrams to post*/
spinlock_t gnd_dgram_lock; /* serialize gnd_dgrams */
struct list_head gnd_map_list; /* list of all mapped regions */
int gnd_map_version; /* version flag for map list */
struct timer_list gnd_map_timer; /* wakey-wakey */
atomic_t gnd_n_mdd; /* number of total MDD - fma, tx, etc */
atomic_t gnd_n_mdd_held; /* number of total MDD held - fma, tx, etc */
atomic_t gnd_nq_map; /* # queued waiting for mapping (MDD/GART) */
atomic64_t gnd_nbytes_map; /* bytes of total GART maps - fma, tx, etc */
__u32 gnd_map_nphys; /* # TX phys mappings */
__u32 gnd_map_physnop; /* # TX phys pages mapped */
spinlock_t gnd_map_lock; /* serialize gnd_map_XXX */
unsigned long gnd_next_map; /* next mapping attempt in jiffies */
int gnd_map_attempt; /* last map attempt # */
unsigned long gnd_last_map; /* map timeout base */
struct list_head gnd_rdmaq; /* RDMA to be sent */
spinlock_t gnd_rdmaq_lock; /* play nice with others */
atomic64_t gnd_rdmaq_bytes_out; /* # bytes authorized */
atomic64_t gnd_rdmaq_bytes_ok; /* # bytes allowed until deadline */
atomic_t gnd_rdmaq_nstalls; /* # stalls due to throttle */
unsigned long gnd_rdmaq_deadline; /* when does bucket roll over ? */
struct timer_list gnd_rdmaq_timer; /* wakey-wakey */
atomic_t gnd_short_ntx; /* TX stats: short messages */
atomic64_t gnd_short_txbytes; /* TX stats: short message payload*/
atomic_t gnd_rdma_ntx; /* TX stats: rdma messages */
atomic64_t gnd_rdma_txbytes; /* TX stats: rdma message payload*/
atomic_t gnd_short_nrx; /* RX stats: short messages */
atomic64_t gnd_short_rxbytes; /* RX stats: short message payload*/
atomic_t gnd_rdma_nrx; /* RX stats: rdma messages */
atomic64_t gnd_rdma_rxbytes; /* RX stats: rdma message payload*/
atomic_t gnd_fast_try; /* # of times fast send tried */
atomic_t gnd_fast_ok; /* # of times fast send ok */
atomic_t gnd_fast_block; /* # of times fast send blocked */
unsigned long gnd_mutex_delay;
atomic_t gnd_n_yield;
atomic_t gnd_n_schedule;
atomic_t gnd_canceled_dgrams; /* # of outstanding cancels */
struct rw_semaphore gnd_conn_sem; /* serialize connection changes/data movement */
void *gnd_smdd_hold_buf; /* buffer to keep smdd */
gni_mem_handle_t gnd_smdd_hold_hndl; /* buffer mem handle */
} kgn_device_t;
typedef struct kgn_net {
struct list_head gnn_list; /* chain on kgni_data::kgn_nets */
kgn_device_t *gnn_dev; /* device for this net */
struct lnet_ni *gnn_ni; /* network interface instance */
atomic_t gnn_refcount; /* # current references */
int gnn_shutdown; /* lnd_shutdown set */
__u16 gnn_netnum; /* stash netnum for quicker lookup */
} kgn_net_t;
static inline lnet_nid_t
kgnilnd_lnd2lnetnid(lnet_nid_t ni_nid, lnet_nid_t kgnilnd_nid)
{
return LNET_MKNID(LNET_NIDNET(ni_nid), LNET_NIDADDR(kgnilnd_nid));
}
static inline lnet_nid_t
kgnilnd_lnet2lndnid(lnet_nid_t lnet_nid, lnet_nid_t kgnilnd_nid)
{
return LNET_MKNID(LNET_NIDNET(kgnilnd_nid), LNET_NIDADDR(lnet_nid));
}
/* The code for this is a bit ugly - but really this just boils down to a __u64
* that can have various parts accessed separately.
*
* The lower 32 bits is the ID
* we give to SMSG for our completion event - it needs to be globally unique across
* all TX currently in flight. We separate that out into the CQID so that we can
* reference the connection (kgnilnd_cqid2conn_locked) and then the msg_id to pull
* the actual TX out of the per-connection gnc_tx_ref_table.
*
* The upper 32 bits are just extra stuff we put into the cookie to ensure this TX
* has a unique value we can send with RDMA setup messages to ensure the completion for
* those is unique across the wire. The extra 32 bits are there to ensure that TX id
* reuse is separated.
*/
typedef struct kgn_tx_ev_id {
union {
__u64 txe_cookie; /* are you my mommy ? */
struct {
__u32 txe_chips; /* extra bits to ensure ID unique across reuse */
union {
__u32 txe_smsg_id; /* ID for SMSG CQ event */
/* N.B: Never ever ever ever use the bit shifts directly,
* you are just asking for a world of pain and are at the
* mercy of the compiler layouts */
struct {
__u32 txe_cqid :GNILND_CQID_NBITS;
__u32 txe_idx :GNILND_MSGID_TX_NBITS;
};
};
};
};
} kgn_tx_ev_id_t;
typedef struct kgn_dgram {
struct list_head gndg_list; /* on hash dev::gnd_dgrams */
kgn_dgram_state_t gndg_state; /* state of this dgram */
kgn_dgram_type_t gndg_type; /* REQ, NAK, etc */
__u32 gndg_magic; /* saftey word */
unsigned long gndg_post_time; /* time when we posted */
struct kgn_conn *gndg_conn; /* unbound conn with ep & smsg */
kgn_connreq_t gndg_conn_out; /* connreq from local node */
kgn_connreq_t gndg_conn_in; /* connreq from remote node */
} kgn_dgram_t;
typedef struct kgn_tx { /* message descriptor */
struct list_head tx_list; /* TX queues - peer, conn, rdma */
kgn_tx_list_state_t tx_list_state;/* where in state machine is this TX ? */
struct list_head *tx_list_p; /* pointer to current list */
struct kgn_conn *tx_conn; /* owning conn */
struct lnet_msg *tx_lntmsg[2]; /* ptl msgs to finalize on completion */
unsigned long tx_qtime; /* when tx started to wait for something (jiffies) */
unsigned long tx_cred_wait; /* time spend waiting for smsg creds */
struct list_head tx_map_list; /* list entry on device map list */
unsigned int tx_nob; /* # bytes of payload */
int tx_buftype; /* payload buffer type */
int tx_phys_npages; /* # physical pages */
gni_mem_handle_t tx_map_key; /* mapping key */
gni_mem_handle_t tx_buffer_copy_map_key; /* mapping key for page aligned copy */
gni_mem_segment_t *tx_phys; /* page descriptors */
kgn_msg_t tx_msg; /* FMA message buffer */
kgn_tx_ev_id_t tx_id; /* who are you, who ? who ? */
__u8 tx_state; /* state of the descriptor */
int tx_retrans; /* retrans count of RDMA */
int tx_rc; /* if we need to stash the ret code until we see completion */
void *tx_buffer; /* source/sink buffer */
void *tx_buffer_copy; /* pointer to page aligned buffer */
unsigned int tx_nob_rdma; /* nob actually rdma */
unsigned int tx_offset; /* offset of data into copied buffer */
union {
gni_post_descriptor_t tx_rdma_desc; /* rdma descriptor */
struct page *tx_imm_pages[GNILND_MAX_IMMEDIATE/PAGE_SIZE]; /* page array to map kiov for immediate send */
};
/* we only use one or the other */
union {
kgn_putack_msg_t tx_putinfo; /* data for differed rdma & re-try */
kgn_get_msg_t tx_getinfo; /* data for rdma re-try*/
};
} kgn_tx_t;
typedef struct kgn_conn {
kgn_device_t *gnc_device; /* which device */
struct kgn_peer *gnc_peer; /* owning peer */
int gnc_magic; /* magic value cleared before free */
struct list_head gnc_list; /* stash on peer's conn list - or pending purgatory lists as we clear them */
struct list_head gnc_hashlist; /* stash in connection hash table */
struct list_head gnc_schedlist; /* schedule (on gnd_?_conns) for attention */
struct list_head gnc_fmaq; /* txs queued for FMA */
struct list_head gnc_mdd_list; /* hold list for MDD on hard conn reset */
struct list_head gnc_delaylist; /* If on this list schedule anytime we get interrupted */
__u64 gnc_peerstamp; /* peer's unique stamp */
__u64 gnc_peer_connstamp; /* peer's unique connection stamp */
__u64 gnc_my_connstamp; /* my unique connection stamp */
unsigned long gnc_first_rx; /* when I first received an FMA message (jiffies) */
unsigned long gnc_last_tx; /* when I last sent an FMA message (jiffies) */
unsigned long gnc_last_rx; /* when I last sent an FMA message (jiffies) */
unsigned long gnc_last_tx_cq; /* when I last received an FMA CQ (jiffies) */
unsigned long gnc_last_rx_cq; /* when I last received an FMA CQ (jiffies) */
unsigned long gnc_last_noop_want; /* time I wanted to send NOOP */
unsigned long gnc_last_noop_sent; /* time I did gni_smsg_send on NOOP */
unsigned long gnc_last_noop_cq; /* time when NOOP completed */
unsigned long gnc_last_sched_ask; /* time when conn added to ready_conns */
unsigned long gnc_last_sched_do; /* time when conn processed from ready_conns */
atomic_t gnc_reaper_noop; /* # reaper triggered NOOP */
atomic_t gnc_sched_noop; /* # sched triggered NOOP */
unsigned int gnc_timeout; /* infer peer death if no rx for this many seconds */
__u32 gnc_cqid; /* my completion callback id (non-unique) */
atomic_t gnc_tx_seq; /* tx msg sequence number */
atomic_t gnc_rx_seq; /* rx msg sequence number */
struct mutex gnc_smsg_mutex; /* tx smsg sequence serialization */
struct mutex gnc_rdma_mutex; /* tx rdma sequence serialization */
__u64 gnc_tx_retrans; /* # retrans on SMSG */
atomic_t gnc_nlive_fma; /* # live FMA */
atomic_t gnc_nq_rdma; /* # queued (on device) RDMA */
atomic_t gnc_nlive_rdma; /* # live RDMA */
short gnc_close_sent; /* I've sent CLOSE */
short gnc_close_recvd; /* I've received CLOSE */
short gnc_in_purgatory; /* in the sin bin */
int gnc_error; /* errno when conn being closed due to error */
int gnc_peer_error; /* errno peer sent us on CLOSE */
kgn_conn_state_t gnc_state; /* connection state */
int gnc_scheduled; /* being attented to */
char gnc_sched_caller[30]; /* what function last called schedule */
int gnc_sched_line; /* what line # last called schedule */
atomic_t gnc_refcount; /* # users */
spinlock_t gnc_list_lock; /* serialise tx lists, max_rx_age */
gni_ep_handle_t gnc_ephandle; /* GNI endpoint */
kgn_fma_memblock_t *gnc_fma_blk; /* pointer to fma block for our mailbox */
gni_smsg_attr_t gnpr_smsg_attr; /* my short msg. attributes */
spinlock_t gnc_tx_lock; /* protect tx alloc/free */
unsigned long gnc_tx_bits[(GNILND_MAX_MSG_ID/8)/sizeof(unsigned long)]; /* bit table for tx id */
int gnc_next_tx; /* next tx to use in tx_ref_table */
kgn_tx_t **gnc_tx_ref_table; /* table of TX descriptors for this conn */
int gnc_mbox_id; /* id of mbox in fma_blk */
short gnc_needs_detach; /* flag set in detach_purgatory_all_locked so reaper will clear out purgatory */
short gnc_needs_closing; /* flag set in del_conns when called from kgnilnd_del_peer_or_conn */
atomic_t gnc_tx_in_use; /* # of tx's currently in use by another thread use kgnilnd_peer_conn_lock */
kgn_dgram_type_t gnc_dgram_type; /* save dgram type used to establish this conn */
void *remote_mbox_addr; /* save remote mbox address */
} kgn_conn_t;
typedef struct kgn_mdd_purgatory {
gni_mem_handle_t gmp_map_key; /* mapping key */
struct list_head gmp_list; /* entry point for purgatory list */
} kgn_mdd_purgatory_t;
typedef struct kgn_peer {
struct list_head gnp_list; /* stash on global peer list */
struct list_head gnp_connd_list; /* schedule on kgn_connd_peers */
struct list_head gnp_conns; /* all active connections and all conns in purgatory for the peer */
struct list_head gnp_tx_queue; /* msgs waiting for a conn */
kgn_net_t *gnp_net; /* net instance for this peer */
lnet_nid_t gnp_nid; /* who's on the other end(s) */
atomic_t gnp_refcount; /* # users */
__u32 gnp_host_id; /* ph. host ID of the peer */
short gnp_connecting; /* connection forming */
short gnp_pending_unlink; /* need last conn close to trigger unlink */
int gnp_last_errno; /* last error conn saw */
time64_t gnp_last_alive; /* last time I had valid comms */
int gnp_last_dgram_errno; /* last error dgrams saw */
unsigned long gnp_last_dgram_time; /* last time I tried to connect */
unsigned long gnp_reconnect_time; /* get_seconds() when reconnect OK */
unsigned long gnp_reconnect_interval; /* exponential backoff */
atomic_t gnp_dirty_eps; /* # of old but yet to be destroyed EPs from conns */
int gnp_state; /* up/down/timedout */
unsigned long gnp_down_event_time; /* time peer down */
unsigned long gnp_up_event_time; /* time peer back up */
} kgn_peer_t;
/* the kgn_rx_t is a struct for handing to LNET as the private pointer for things
* like lnet_parse. It allows a single pointer to let us get enough
* information in _recv and friends */
typedef struct kgn_rx {
kgn_conn_t *grx_conn; /* connection */
kgn_msg_t *grx_msg; /* message */
struct lnet_msg *grx_lntmsg; /* lnet msg for this rx (eager only) */
int grx_eager; /* if eager, we copied msg to somewhere */
struct timespec64 grx_received; /* time this msg received */
} kgn_rx_t;
typedef struct kgn_data {
int kgn_init; /* initialisation state */
int kgn_shutdown; /* shut down? */
int kgn_wc_kill; /* Should I repost the WC */
atomic_t kgn_nthreads; /* # live threads */
int kgn_nresets; /* number of stack resets */
int kgn_in_reset; /* are we in stack reset ? */
__u64 kgn_nid_trans_private;/* private data for each of the HW nid2nic arenas */
kgn_device_t kgn_devices[GNILND_MAXDEVS]; /* device/ptag/cq etc */
int kgn_ndevs; /* # devices */
int kgn_ruhroh_running; /* ruhroh thread is running */
int kgn_ruhroh_shutdown; /* ruhroh thread should or is shut down */
wait_queue_head_t kgn_ruhroh_waitq; /* ruhroh thread wakeup */
int kgn_quiesce_trigger; /* should we quiesce ? */
atomic_t kgn_nquiesce; /* how many quiesced ? */
struct mutex kgn_quiesce_mutex; /* serialize ruhroh task, startup and shutdown */
int kgn_needs_reset; /* we need stack reset */
/* These next three members implement communication from gnilnd into
* the ruhroh task. To ensure correct operation of the task, code that
* writes into them must use memory barriers to ensure that the changes
* are visible to other cores in the order the members appear below. */
__u32 kgn_quiesce_secs; /* seconds to bump timeouts */
int kgn_bump_info_rdy; /* we have info needed to bump */
int kgn_needs_pause; /* we need to pause for network quiesce */
struct list_head *kgn_nets; /* hashtable of kgn_net instances */
struct rw_semaphore kgn_net_rw_sem; /* serialise gnn_shutdown, kgn_nets */
rwlock_t kgn_peer_conn_lock; /* stabilize peer/conn ops */
struct list_head *kgn_peers; /* hash table of all my known peers */
atomic_t kgn_npeers; /* # peers extant */
int kgn_peer_version; /* version flag for peer tables */
struct list_head *kgn_conns; /* conns hashed by cqid */
atomic_t kgn_nconns; /* # connections extant */
atomic_t kgn_neager_allocs; /* # of eager allocations */
__u64 kgn_peerstamp; /* when I started up */
__u64 kgn_connstamp; /* conn stamp generator */
int kgn_conn_version; /* version flag for conn tables */
int kgn_next_cqid; /* cqid generator */
long kgn_new_min_timeout; /* minimum timeout on any new conn */
wait_queue_head_t kgn_reaper_waitq; /* reaper sleeps here */
spinlock_t kgn_reaper_lock; /* serialise */
struct kmem_cache *kgn_rx_cache; /* rx descriptor space */
struct kmem_cache *kgn_tx_cache; /* tx descriptor memory */
struct kmem_cache *kgn_tx_phys_cache; /* tx phys descriptor memory */
atomic_t kgn_ntx; /* # tx in use */
struct kmem_cache *kgn_dgram_cache; /* outgoing datagrams */
struct page ***kgn_cksum_map_pages; /* page arrays for mapping pages on checksum */
__u64 kgn_cksum_npages; /* # pages alloc'd for checksumming */
atomic_t kgn_nvmap_cksum; /* # times we vmapped for checksums */
atomic_t kgn_nvmap_short; /* # times we vmapped for short kiov */
atomic_t kgn_nkmap_short; /* # time we kmapped for a short kiov */
long kgn_rdmaq_override; /* bytes per second override */
struct kmem_cache *kgn_mbox_cache; /* mailboxes from not-GART */
atomic_t kgn_npending_unlink; /* # of peers pending unlink */
atomic_t kgn_npending_conns; /* # of conns with pending closes */
atomic_t kgn_npending_detach; /* # of conns with a pending detach */
unsigned long kgn_last_scheduled; /* last time schedule was called */
unsigned long kgn_last_condresched; /* last time cond_resched was called */
atomic_t kgn_rev_offset; /* # of REV rdma w/misaligned offsets */
atomic_t kgn_rev_length; /* # of REV rdma have misaligned len */
atomic_t kgn_rev_copy_buff; /* # of REV rdma buffer copies */
unsigned long free_pages_limit; /* # of free pages reserve from fma block allocations */
int kgn_enable_gl_mutex; /* kgni api mtx enable */
} kgn_data_t;
extern kgn_data_t kgnilnd_data;
extern kgn_tunables_t kgnilnd_tunables;
extern void kgnilnd_destroy_peer(kgn_peer_t *peer);
extern void kgnilnd_destroy_conn(kgn_conn_t *conn);
extern int _kgnilnd_schedule_conn(kgn_conn_t *conn, const char *caller, int line, int refheld, int lock_held);
extern int _kgnilnd_schedule_delay_conn(kgn_conn_t *conn);
static inline int kgnilnd_timeout(void)
{
return *kgnilnd_tunables.kgn_timeout ?: lnet_get_lnd_timeout();
}
/* Macro wrapper for _kgnilnd_schedule_conn. This will store the function
* and the line of the calling function to allow us to debug problematic
* schedule calls in the future without the programmer having to mark
* the location manually.
*/
#define kgnilnd_schedule_conn(conn) \
_kgnilnd_schedule_conn(conn, __func__, __LINE__, 0, 0);
#define kgnilnd_schedule_conn_refheld(conn, refheld) \
_kgnilnd_schedule_conn(conn, __func__, __LINE__, refheld, 0);
#define kgnilnd_schedule_conn_nolock(conn) \
_kgnilnd_schedule_conn(conn, __func__, __LINE__, 0, 1);
/* Macro wrapper for _kgnilnd_schedule_delay_conn. This will allow us to store
* extra data if we need to.
*/
#define kgnilnd_schedule_delay_conn(conn) \
_kgnilnd_schedule_delay_conn(conn);
static inline void
kgnilnd_thread_fini(void)
{
atomic_dec(&kgnilnd_data.kgn_nthreads);
}
static inline void kgnilnd_gl_mutex_lock(struct mutex *lock)
{
if (kgnilnd_data.kgn_enable_gl_mutex)
mutex_lock(lock);
}
static inline void kgnilnd_gl_mutex_unlock(struct mutex *lock)
{
if (kgnilnd_data.kgn_enable_gl_mutex)
mutex_unlock(lock);
}
static inline void kgnilnd_conn_mutex_lock(struct mutex *lock)
{
if (!kgnilnd_data.kgn_enable_gl_mutex)
mutex_lock(lock);
}
static inline void kgnilnd_conn_mutex_unlock(struct mutex *lock)
{
if (!kgnilnd_data.kgn_enable_gl_mutex)
mutex_unlock(lock);
}
/* like mutex_trylock but with a jiffies spinner. This is to allow certain
* parts of the code to avoid a scheduler trip when the mutex is held
*
* Try to acquire the mutex atomically for 1 jiffie. Returns 1 if the mutex
* has been acquired successfully, and 0 on contention.
*
* NOTE: this function follows the spin_trylock() convention, so
* it is negated to the down_trylock() return values! Be careful
* about this when converting semaphore users to mutexes.
*
* This function must not be used in interrupt context. The
* mutex must be released by the same task that acquired it.
*/
static inline int __kgnilnd_mutex_trylock(struct mutex *lock)
{
int ret;
unsigned long timeout;
LASSERT(!in_interrupt());
for (timeout = jiffies + 1; time_before(jiffies, timeout);) {
ret = mutex_trylock(lock);
if (ret)
return ret;
}
return 0;
}
static inline int kgnilnd_mutex_trylock(struct mutex *lock)
{
if (!kgnilnd_data.kgn_enable_gl_mutex)
return 1;
return __kgnilnd_mutex_trylock(lock);
}
static inline int kgnilnd_trylock(struct mutex *cq_lock,
struct mutex *c_lock)
{
if (kgnilnd_data.kgn_enable_gl_mutex)
return __kgnilnd_mutex_trylock(cq_lock);
else
return __kgnilnd_mutex_trylock(c_lock);
}
static inline void *kgnilnd_vzalloc(int size)
{
void *ret;
if (*kgnilnd_tunables.kgn_vzalloc_noretry)
ret = __compat_vmalloc(size, __GFP_HIGHMEM | GFP_NOIO |
__GFP_ZERO | __GFP_NORETRY);
else
ret = __compat_vmalloc(size, __GFP_HIGHMEM | GFP_NOIO |
__GFP_ZERO);
LIBCFS_ALLOC_POST(ret, size, "alloc");
return ret;
}
static inline void kgnilnd_vfree(void *ptr, int size)
{
LIBCFS_FREE_PRE(ptr, size, "vfree");
vfree(ptr);
}
/* as of kernel version 4.2, set_mb is replaced with smp_store_mb */
#ifndef set_mb
#define set_mb smp_store_mb
#endif
/* Copied from DEBUG_REQ in Lustre - the dance is needed to save stack space */
extern void
_kgnilnd_debug_msg(kgn_msg_t *msg,
struct libcfs_debug_msg_data *data, const char *fmt, ... );
#define kgnilnd_debug_msg(msgdata, mask, cdls, msg, fmt, a...) \
do { \
if (((mask) & D_CANTMASK) != 0 || \
((libcfs_debug & (mask)) != 0 && \
(libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
_kgnilnd_debug_msg((msg), msgdata, fmt, ##a); \
} while(0)
/* for most callers (level is a constant) this is resolved at compile time */
#define GNIDBG_MSG(level, msg, fmt, args...) \
do { \
if ((level) & (D_ERROR | D_WARNING | D_NETERROR)) { \
static struct cfs_debug_limit_state cdls; \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, &cdls); \
kgnilnd_debug_msg(&msgdata, level, &cdls, msg, \
"$$ "fmt" from %s ", ## args, \
libcfs_nid2str((msg)->gnm_srcnid)); \
} else { \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, NULL); \
kgnilnd_debug_msg(&msgdata, level, NULL, msg, \
"$$ "fmt" from %s ", ## args, \
libcfs_nid2str((msg)->gnm_srcnid)); \
} \
} while (0)
/* user puts 'to nid' in msg for us */
#define GNIDBG_TOMSG(level, msg, fmt, args...) \
do { \
if ((level) & (D_ERROR | D_WARNING | D_NETERROR)) { \
static struct cfs_debug_limit_state cdls; \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, &cdls); \
kgnilnd_debug_msg(&msgdata, level, &cdls, msg, \
"$$ "fmt" ", ## args); \
} else { \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, NULL); \
kgnilnd_debug_msg(&msgdata, level, NULL, msg, \
"$$ "fmt" ", ## args); \
} \
} while (0)
extern void
_kgnilnd_debug_conn(kgn_conn_t *conn,
struct libcfs_debug_msg_data *data, const char *fmt, ... );
#define kgnilnd_debug_conn(msgdata, mask, cdls, conn, fmt, a...) \
do { \
if (((mask) & D_CANTMASK) != 0 || \
((libcfs_debug & (mask)) != 0 && \
(libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
_kgnilnd_debug_conn((conn), msgdata, fmt, ##a); \
} while(0)
/* for most callers (level is a constant) this is resolved at compile time */
#define GNIDBG_CONN(level, conn, fmt, args...) \
do { \
if ((level) & (D_ERROR | D_WARNING | D_NETERROR)) { \
static struct cfs_debug_limit_state cdls; \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, &cdls); \
kgnilnd_debug_conn(&msgdata, level, &cdls, conn, \
"$$ "fmt" ", ## args); \
} else { \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, NULL); \
kgnilnd_debug_conn(&msgdata, level, NULL, conn, \
"$$ "fmt" ", ## args); \
} \
} while (0)
extern void
_kgnilnd_debug_tx(kgn_tx_t *tx,
struct libcfs_debug_msg_data *data, const char *fmt, ... );
#define kgnilnd_debug_tx(msgdata, mask, cdls, tx, fmt, a...) \
do { \
if (((mask) & D_CANTMASK) != 0 || \
((libcfs_debug & (mask)) != 0 && \
(libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
_kgnilnd_debug_tx((tx), msgdata, fmt, ##a); \
} while(0)
/* for most callers (level is a constant) this is resolved at compile time */
#define GNIDBG_TX(level, tx, fmt, args...) \
do { \
if ((level) & (D_ERROR | D_WARNING | D_NETERROR)) { \
static struct cfs_debug_limit_state cdls; \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, &cdls); \
kgnilnd_debug_tx(&msgdata, level, &cdls, tx, \
"$$ "fmt" ", ## args); \
} else { \
LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, level, NULL); \
kgnilnd_debug_tx(&msgdata, level, NULL, tx, \
"$$ "fmt" ", ## args); \
} \
} while (0)
#define GNITX_ASSERTF(tx, cond, fmt, a...) \
({ \
if (unlikely(!(cond))) { \
GNIDBG_TX(D_EMERG, tx, "ASSERTION(" #cond ") failed:" fmt, a); \
LBUG(); \
} \
})
#define GNILND_IS_QUIESCED \
(atomic_read(&kgnilnd_data.kgn_nquiesce) == \
atomic_read(&kgnilnd_data.kgn_nthreads))
#define KGNILND_SPIN_QUIESCE \
do { \
/* E.T phone home */ \
atomic_inc(&kgnilnd_data.kgn_nquiesce); \
CDEBUG(D_NET, "Waiting for thread pause to be over...\n"); \
while (kgnilnd_data.kgn_quiesce_trigger) { \
msleep_interruptible(MSEC_PER_SEC); \
} \
/* Mom, my homework is done */ \
CDEBUG(D_NET, "Waking up from thread pause\n"); \
atomic_dec(&kgnilnd_data.kgn_nquiesce); \
} while(0)
/* use macros for addref/decref to get the calling function name in the CDEBUG */
#ifndef LIBCFS_DEBUG
#error "this code uses actions inside LASSERT for ref counting"
#endif
#define kgnilnd_admin_addref(atomic) \
do { \
int val = atomic_inc_return(&atomic); \
LASSERTF(val > 0, #atomic " refcount %d\n", val); \
CDEBUG(D_NETTRACE, #atomic " refcount %d\n", val); \
} while (0)
#define kgnilnd_admin_decref(atomic) \
do { \
int val = atomic_dec_return(&atomic); \
LASSERTF(val >= 0, #atomic " refcount %d\n", val); \
CDEBUG(D_NETTRACE, #atomic " refcount %d\n", val); \
if (!val) \
wake_up_var(&kgnilnd_data); \
}while (0)
#define kgnilnd_net_addref(net) \
do { \
int val = atomic_inc_return(&net->gnn_refcount); \
LASSERTF(val > 1, "net %px refcount %d\n", net, val); \
CDEBUG(D_NETTRACE, "net %p->%s++ (%d)\n", net, \
libcfs_nidstr(&net->gnn_ni->ni_nid), val); \
} while (0)
#define kgnilnd_net_decref(net) \
do { \
int val = atomic_dec_return(&net->gnn_refcount); \
LASSERTF(val >= 0, "net %px refcount %d\n", net, val); \
CDEBUG(D_NETTRACE, "net %p->%s-- (%d)\n", net, \
libcfs_nidstr(&net->gnn_ni->ni_nid), val); \
} while (0)
#define kgnilnd_peer_addref(peer) \
do { \
int val = atomic_inc_return(&peer->gnp_refcount); \
LASSERTF(val > 1, "peer %px refcount %d\n", peer, val); \
CDEBUG(D_NETTRACE, "peer %p->%s++ (%d)\n", peer, \
libcfs_nid2str(peer->gnp_nid), val); \
} while (0)
#define kgnilnd_peer_decref(peer) \
do { \
int val = atomic_dec_return(&peer->gnp_refcount); \
LASSERTF(val >= 0, "peer %px refcount %d\n", peer, val); \
CDEBUG(D_NETTRACE, "peer %p->%s--(%d)\n", peer, \
libcfs_nid2str(peer->gnp_nid), val); \
if (val == 0) \
kgnilnd_destroy_peer(peer); \
} while(0)
#define kgnilnd_conn_addref(conn) \
do { \
int val; \
\
smp_wmb(); \
val = atomic_inc_return(&conn->gnc_refcount); \
LASSERTF(val > 1 && conn->gnc_magic == GNILND_CONN_MAGIC, \
"conn %px refc %d to %s\n", \
conn, val, \
conn->gnc_peer \
? libcfs_nid2str(conn->gnc_peer->gnp_nid) \
: "<?>"); \
CDEBUG(D_NETTRACE, "conn %p->%s++ (%d)\n", conn, \
conn->gnc_peer \
? libcfs_nid2str(conn->gnc_peer->gnp_nid) \
: "<?>", \
val); \
} while (0)
/* we hijack conn_decref && gnc_refcount = 1 to allow us to push the conn
* through the scheduler thread to get the EP destroyed. This avoids some
* messy semaphore business and allows us to reuse the connd_list and existing
* linkage and avoid creating extra lists just for destroying EPs */
/* Safety Disclaimer:
* Q: If we decrement the refcount and then check it again, is it possible that
* another caller could have passed through this macro concurrently? If so,
* then it is possible that both will attempt to call kgnilnd_destroy_conn().
*
* A: Yes, entirely possible in most cases, but we can't get concurrent users
* once we are refcount <= 2. It hinges around gnc_state and membership of
* gnc_hashlist. There are two ways to find a connection - either ask for
* it from the peer, kgnilnd_find_conn_locked(peer) or from the CQ id,
* kgnilnd_cqid2conn_locked(id). While a conn is live, we'll have at least
* 4 refcounts
*
* - #1 from create (kgnilnd_create_conn)
* - #2 for EP (kgnilnd_create_conn)
* - #3 - living on peer (gnc_list, kgnilnd_finish_connect)
* - #4 living in global hash (gnc_hashlist, kgnilnd_finish_connect).
*
* Actually, only 3 live, as at the end of kgnilnd_finish_connect, we drop:
* - #1 - the ref the dgram inherited from kgnilnd_create_conn.
*
* There could be more from TX descriptors during the lifetime of a live
* conn.
*
* If we nuke the conn before finish_connect, we won't have parallel paths
* because nobody besides the dgram handler for the single outstanding
* dgram can find the connection as it isn't in any searchable tables yet.
*
* This leaves connection close, we'll drop 2 refs (#4 and #3) but only
* after calling kgnilnd_schedule_conn, which would add a new ref (#5). At
* this point gnc_refcount=2 (#2, #5). We have a 'maybe' send of the CLOSE
* now on the next scheduler loop, this could be #6 (schedule_conn again)
* and #7 (TX on gnc_fmaq). Both would be cleared quickly as that TX is
* sent. Now the gnc_state == CLOSED, so we hit
* kgnilnd_complete_closed_conn. At this point, nobody can 'find' this conn
* - we've nuked them from the peer and CQ id tables, so we own them and
* are guaranteed serial access - hence the complete lack of conn list
* locking in kgnilnd_complete_closed_conn. We are free then to mark the
* conn DESTROY_EP (add #6 for schedule_conn), then lose #5 in
* kgnilnd_process_conns. Then the next scheduler loop would call
* kgnilnd_destroy_conn_ep (drop #2 for EP) and lose #6 (refcount=0) in
* kgnilnd_process_conns.
*
* Clearly, we are totally safe. Clearly.
*/
#define kgnilnd_conn_decref(conn) \
do { \
int val; \
\
smp_wmb(); \
val = atomic_dec_return(&conn->gnc_refcount); \
LASSERTF(val >= 0, "conn %px refc %d to %s\n", \
conn, val, \
conn->gnc_peer \
? libcfs_nid2str(conn->gnc_peer->gnp_nid) \
: "<?>"); \
CDEBUG(D_NETTRACE, "conn %p->%s-- (%d)\n", conn, \
conn->gnc_peer \
? libcfs_nid2str(conn->gnc_peer->gnp_nid) \
: "<?>", \
val); \
smp_rmb(); \
if ((val == 1) && \
(conn->gnc_ephandle != NULL) && \
(conn->gnc_state != GNILND_CONN_DESTROY_EP)) { \
set_mb(conn->gnc_state, GNILND_CONN_DESTROY_EP); \
kgnilnd_schedule_conn(conn); \
} else if (val == 0) { \
kgnilnd_destroy_conn(conn); \
} \
} while (0)
static inline struct list_head *
kgnilnd_nid2peerlist(lnet_nid_t nid)
{
unsigned int hash = ((unsigned int)LNET_NIDADDR(nid)) % *kgnilnd_tunables.kgn_peer_hash_size;
RETURN(&kgnilnd_data.kgn_peers[hash]);
}
static inline struct list_head *
kgnilnd_netnum2netlist(__u16 netnum)
{
unsigned int hash = ((unsigned int) netnum) % *kgnilnd_tunables.kgn_net_hash_size;
RETURN(&kgnilnd_data.kgn_nets[hash]);
}
static inline int
kgnilnd_peer_active(kgn_peer_t *peer)
{
/* Am I in the peer hash table? */
return (!list_empty(&peer->gnp_list));
}
/* need write_lock on kgn_peer_conn_lock */
static inline int
kgnilnd_can_unlink_peer_locked(kgn_peer_t *peer)
{
CDEBUG(D_NET, "peer 0x%p->%s conns? %d tx? %d\n",
peer, libcfs_nid2str(peer->gnp_nid),
!list_empty(&peer->gnp_conns),
!list_empty(&peer->gnp_tx_queue));
/* kgn_peer_conn_lock protects us from conflict with
* kgnilnd_peer_notify and gnp_persistent */
RETURN ((list_empty(&peer->gnp_conns)) &&
(list_empty(&peer->gnp_tx_queue)));
}
/* returns positive if error was for a clean shutdown of conn */
static inline int
kgnilnd_conn_clean_errno(int errno)
{
/* - ESHUTDOWN - LND is unloading
* - EUCLEAN - admin requested via "lctl del_peer"
* - ENETRESET - admin requested via "lctl disconnect" or rca event
* - ENOTRECOVERABLE - stack reset
* - EISCONN - cleared via "lctl push"
* not doing ESTALE - that isn't clean */
RETURN ((errno == 0) ||
(errno == -ESHUTDOWN) ||
(errno == -EUCLEAN) ||
(errno == -ENETRESET) ||
(errno == -EISCONN) ||
(errno == -ENOTRECOVERABLE));
}
/* returns positive if error results in purgatory hold */
static inline int
kgnilnd_check_purgatory_errno(int errno)
{
/* We don't want to save the purgatory lists these cases:
* - EUCLEAN - admin requested via "lctl del_peer"
* - ESHUTDOWN - LND is unloading
*/
RETURN ((errno != -ESHUTDOWN) &&
(errno != -EUCLEAN));
}
/* returns positive if a purgatory hold is needed */
static inline int
kgnilnd_check_purgatory_conn(kgn_conn_t *conn)
{
int loopback = 0;
if (conn->gnc_peer) {
loopback = conn->gnc_peer->gnp_nid ==
lnet_nid_to_nid4(&conn->gnc_peer->gnp_net->gnn_ni->ni_nid);
} else {
/* short circuit - a conn that didn't complete
* setup never needs a purgatory hold */
RETURN(0);
}
CDEBUG(D_NETTRACE, "conn 0x%p->%s loopback %d close_recvd %d\n",
conn, conn->gnc_peer ?
libcfs_nid2str(conn->gnc_peer->gnp_nid) :
"<?>",
loopback, conn->gnc_close_recvd);
/* we only use a purgatory hold if we've not received the CLOSE msg
* from our peer - without that message, we can't know the state of
* the other end of this connection and must put it into purgatory
* to prevent reuse and corruption.
* The theory is that a TX error can be communicated in all other cases
*/
RETURN(likely(!loopback) && !conn->gnc_close_recvd &&
kgnilnd_check_purgatory_errno(conn->gnc_error));
}
static inline const char *
kgnilnd_tx_state2str(kgn_tx_list_state_t state);
static inline struct list_head *
kgnilnd_tx_state2list(kgn_peer_t *peer, kgn_conn_t *conn,
kgn_tx_list_state_t to_state)
{
switch (to_state) {
case GNILND_TX_PEERQ:
return &peer->gnp_tx_queue;
case GNILND_TX_FMAQ:
return &conn->gnc_fmaq;
case GNILND_TX_LIVE_FMAQ:
case GNILND_TX_LIVE_RDMAQ:
case GNILND_TX_DYING:
return NULL;
case GNILND_TX_MAPQ:
return &conn->gnc_device->gnd_map_tx;
case GNILND_TX_RDMAQ:
return &conn->gnc_device->gnd_rdmaq;
default:
/* IDLE, FREED or ALLOCD is not valid "on list" state */
CERROR("invalid state requested: %s\n",
kgnilnd_tx_state2str(to_state));
LBUG();
break;
}
}
/* should hold tx, conn or peer lock when calling */
static inline void
kgnilnd_tx_add_state_locked(kgn_tx_t *tx, kgn_peer_t *peer,
kgn_conn_t *conn, kgn_tx_list_state_t state,
int add_tail)
{
struct list_head *list = NULL;
/* make sure we have a sane TX state to start */
GNITX_ASSERTF(tx, (tx->tx_list_p == NULL &&
tx->tx_list_state == GNILND_TX_ALLOCD) &&
list_empty(&tx->tx_list),
"bad state with tx_list %s",
list_empty(&tx->tx_list) ? "empty" : "not empty");
/* WTF - you are already on that state buttmunch */
GNITX_ASSERTF(tx, state != tx->tx_list_state,
"already at %s", kgnilnd_tx_state2str(state));
/* get proper list from the state requested */
list = kgnilnd_tx_state2list(peer, conn, state);
/* add refcount */
switch (state) {
case GNILND_TX_PEERQ:
kgnilnd_peer_addref(peer);
break;
case GNILND_TX_ALLOCD:
/* no refs needed */
break;
case GNILND_TX_FMAQ:
kgnilnd_conn_addref(conn);
break;
case GNILND_TX_MAPQ:
atomic_inc(&conn->gnc_device->gnd_nq_map);
kgnilnd_conn_addref(conn);
break;
case GNILND_TX_LIVE_FMAQ:
atomic_inc(&conn->gnc_nlive_fma);
kgnilnd_conn_addref(conn);
break;
case GNILND_TX_LIVE_RDMAQ:
atomic_inc(&conn->gnc_nlive_rdma);
kgnilnd_conn_addref(conn);
break;
case GNILND_TX_RDMAQ:
atomic_inc(&conn->gnc_nq_rdma);
kgnilnd_conn_addref(conn);
break;
case GNILND_TX_DYING:
kgnilnd_conn_addref(conn);
break;
default:
CERROR("invalid state requested: %s\n",
kgnilnd_tx_state2str(state));
LBUG();
break;;
}
/* if this changes, change kgnilnd_alloc_tx */
tx->tx_list_state = state;
/* some states don't have lists - we track them in the per conn
* TX table instead. Waste not, want not! */
if (list != NULL) {
tx->tx_list_p = list;
if (add_tail)
list_add_tail(&tx->tx_list, list);
else
list_add(&tx->tx_list, list);
} else {
/* set dummy list_p to make book keeping happy and let debugging
* be a hair easier */
tx->tx_list_p = (void *)state;
}
GNIDBG_TX(D_NET, tx, "onto %s->0x%p",
kgnilnd_tx_state2str(state), list);
}
static inline void
kgnilnd_tx_del_state_locked(kgn_tx_t *tx, kgn_peer_t *peer,
kgn_conn_t *conn, kgn_tx_list_state_t new_state)
{
/* These is only 1 "off-list" state */
GNITX_ASSERTF(tx, new_state == GNILND_TX_ALLOCD,
"invalid new_state %s", kgnilnd_tx_state2str(new_state));
/* new_state == ALLOCD means we are deallocating this tx,
* so make sure it was on a valid list to start with */
GNITX_ASSERTF(tx, (tx->tx_list_p != NULL) &&
(((tx->tx_list_state == GNILND_TX_LIVE_FMAQ) ||
(tx->tx_list_state == GNILND_TX_LIVE_RDMAQ) ||
(tx->tx_list_state == GNILND_TX_DYING)) == list_empty(&tx->tx_list)),
"bad state", NULL);
GNIDBG_TX(D_NET, tx, "off %p", tx->tx_list_p);
/* drop refcount */
switch (tx->tx_list_state) {
case GNILND_TX_PEERQ:
kgnilnd_peer_decref(peer);
break;
case GNILND_TX_FREED:
case GNILND_TX_IDLE:
case GNILND_TX_ALLOCD:
/* no refs needed */
break;
case GNILND_TX_DYING:
kgnilnd_conn_decref(conn);
break;
case GNILND_TX_FMAQ:
kgnilnd_conn_decref(conn);
break;
case GNILND_TX_MAPQ:
atomic_dec(&conn->gnc_device->gnd_nq_map);
kgnilnd_conn_decref(conn);
break;
case GNILND_TX_LIVE_FMAQ:
atomic_dec(&conn->gnc_nlive_fma);
kgnilnd_conn_decref(conn);
break;
case GNILND_TX_LIVE_RDMAQ:
atomic_dec(&conn->gnc_nlive_rdma);
kgnilnd_conn_decref(conn);
break;
case GNILND_TX_RDMAQ:
atomic_dec(&conn->gnc_nq_rdma);
kgnilnd_conn_decref(conn);
/* don't need to assert on default, already did in set */
}
/* for ALLOCD, this might already be true, but no harm doing it again */
list_del_init(&tx->tx_list);
tx->tx_list_p = NULL;
tx->tx_list_state = new_state;
}
static inline int
kgnilnd_tx_mapped(kgn_tx_t *tx)
{
return tx->tx_buftype == GNILND_BUF_PHYS_MAPPED;
}
static inline struct list_head *
kgnilnd_cqid2connlist(__u32 cqid)
{
unsigned int hash = cqid % *kgnilnd_tunables.kgn_peer_hash_size;
return (&kgnilnd_data.kgn_conns [hash]);
}
static inline kgn_conn_t *
kgnilnd_cqid2conn_locked(__u32 cqid)
{
struct list_head *conns = kgnilnd_cqid2connlist(cqid);
struct list_head *tmp;
kgn_conn_t *conn;
list_for_each(tmp, conns) {
conn = list_entry(tmp, kgn_conn_t, gnc_hashlist);
if (conn->gnc_cqid == cqid)
return conn;
}
return NULL;
}
/* returns 1..GNILND_MAX_CQID on success, 0 on failure */
static inline __u32
kgnilnd_get_cqid_locked(void)
{
int looped = 0;
__u32 cqid;
do {
cqid = kgnilnd_data.kgn_next_cqid++;
if (kgnilnd_data.kgn_next_cqid >= GNILND_MAX_CQID) {
if (looped) {
return 0;
}
kgnilnd_data.kgn_next_cqid = 1;
looped = 1;
}
} while (kgnilnd_cqid2conn_locked(cqid) != NULL);
return cqid;
}
static inline void
kgnilnd_validate_tx_ev_id(kgn_tx_ev_id_t *ev_id, kgn_tx_t **txp, kgn_conn_t **connp)
{
kgn_tx_t *tx = NULL;
kgn_conn_t *conn = NULL;
/* set to NULL so any early return is an error */
*txp = NULL;
*connp = NULL;
LASSERTF((ev_id->txe_idx > 0) &&
(ev_id->txe_idx < GNILND_MAX_MSG_ID),
"bogus txe_idx %d >= %d\n",
ev_id->txe_idx, GNILND_MAX_MSG_ID);
LASSERTF((ev_id->txe_cqid > 0) &&
(ev_id->txe_cqid < GNILND_MAX_CQID),
"bogus txe_cqid %d >= %d\n",
ev_id->txe_cqid, GNILND_MAX_CQID);
read_lock(&kgnilnd_data.kgn_peer_conn_lock);
conn = kgnilnd_cqid2conn_locked(ev_id->txe_cqid);
if (conn == NULL) {
/* Conn was destroyed? */
read_unlock(&kgnilnd_data.kgn_peer_conn_lock);
CDEBUG(D_NET, "CQID %d lookup failed\n", ev_id->txe_cqid);
return;
}
/* just insurance */
kgnilnd_conn_addref(conn);
kgnilnd_admin_addref(conn->gnc_tx_in_use);
read_unlock(&kgnilnd_data.kgn_peer_conn_lock);
/* we know this is safe - as the TX won't be reused until AFTER
* the conn is unlinked from the cqid hash, so we can use the TX
* (serializing to avoid any cache oddness) freely from the conn tx ref table */
spin_lock(&conn->gnc_tx_lock);
tx = conn->gnc_tx_ref_table[ev_id->txe_idx];
spin_unlock(&conn->gnc_tx_lock);
/* We could have a tx that was cleared out by other forces
* lctl disconnect or del_peer. */
if (tx == NULL) {
CNETERR("txe_idx %d is gone, ignoring event\n", ev_id->txe_idx);
kgnilnd_admin_decref(conn->gnc_tx_in_use);
kgnilnd_conn_decref(conn);
return;
}
/* check tx->tx_msg magic to make sure kgni didn't eat it */
GNITX_ASSERTF(tx, tx->tx_msg.gnm_magic == GNILND_MSG_MAGIC,
"came back from kgni with bad magic %x", tx->tx_msg.gnm_magic);
GNITX_ASSERTF(tx, tx->tx_id.txe_idx == ev_id->txe_idx,
"conn 0x%p->%s tx_ref_table hosed: wanted txe_idx %d "
"found tx %px txe_idx %d",
conn, libcfs_nid2str(conn->gnc_peer->gnp_nid),
ev_id->txe_idx, tx, tx->tx_id.txe_idx);
GNITX_ASSERTF(tx, tx->tx_conn != NULL, "tx with NULL connection", NULL);
GNITX_ASSERTF(tx, tx->tx_conn == conn, "tx conn does not equal conn", NULL);
*txp = tx;
*connp = conn;
GNIDBG_TX(D_NET, tx, "validated to 0x%p", conn);
}
/* set_normalized_timepsec isn't exported from the kernel, so
* we need to do the same thing inline */
static inline struct timespec
kgnilnd_ts_sub(struct timespec lhs, struct timespec rhs)
{
time_t sec;
long nsec;
struct timespec ts;
sec = lhs.tv_sec - rhs.tv_sec;
nsec = lhs.tv_nsec - rhs.tv_nsec;
while (nsec >= NSEC_PER_SEC) {
nsec -= NSEC_PER_SEC;
++sec;
}
while (nsec < 0) {
nsec += NSEC_PER_SEC;
--sec;
}
ts.tv_sec = sec;
ts.tv_nsec = nsec;
return ts;
}
static inline int
kgnilnd_count_list(struct list_head *q)
{
struct list_head *e;
int n = 0;
list_for_each(e, q) {
n++;
}
return n;
}
/* kgnilnd_find_net adds a reference to the net it finds
* this is so the net will not be removed before the calling function
* has time to use the data returned. This reference needs to be released
* by the calling function once it has finished using the returned net
*/
static inline int
kgnilnd_find_net(lnet_nid_t nid, kgn_net_t **netp)
{
kgn_net_t *net;
int rc;
rc = down_read_trylock(&kgnilnd_data.kgn_net_rw_sem);
if (!rc) {
return -ESHUTDOWN;
}
list_for_each_entry(net,
kgnilnd_netnum2netlist(LNET_NETNUM(LNET_NIDNET(nid))),
gnn_list) {
if (!net->gnn_shutdown &&
LNET_NID_NET(&net->gnn_ni->ni_nid) == LNET_NIDNET(nid)) {
kgnilnd_net_addref(net);
up_read(&kgnilnd_data.kgn_net_rw_sem);
*netp = net;
return 0;
}
}
up_read(&kgnilnd_data.kgn_net_rw_sem);
return -ENONET;
}
#ifdef CONFIG_DEBUG_SLAB
#define KGNILND_POISON(ptr, c, s) do {} while(0)
#else
#define KGNILND_POISON(ptr, c, s) memset(ptr, c, s)
#endif
#define CURRENT_LND_VERSION 1
enum kgnilnd_ni_lnd_tunables_attr {
LNET_NET_GNILND_TUNABLES_ATTR_UNSPEC = 0,
LNET_NET_GNILND_TUNABLES_ATTR_LND_TIMEOUT,
__LNET_NET_GNILND_TUNABLES_ATTR_MAX_PLUS_ONE,
};
#define LNET_NET_GNILND_TUNABLES_ATTR_MAX (__LNET_NET_GNILND_TUNABLES_ATTR_MAX_PLUS_ONE - 1)
int kgnilnd_dev_init(kgn_device_t *dev);
void kgnilnd_dev_fini(kgn_device_t *dev);
int kgnilnd_startup(struct lnet_ni *ni);
void kgnilnd_shutdown(struct lnet_ni *ni);
int kgnilnd_base_startup(void);
void kgnilnd_base_shutdown(void);
int kgnilnd_allocate_phys_fmablk(kgn_device_t *device);
int kgnilnd_map_phys_fmablk(kgn_device_t *device);
void kgnilnd_unmap_fma_blocks(kgn_device_t *device);
void kgnilnd_free_phys_fmablk(kgn_device_t *device);
int kgnilnd_ctl(struct lnet_ni *ni, unsigned int cmd, void *arg);
int kgnilnd_send(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg);
int kgnilnd_eager_recv(struct lnet_ni *ni, void *private,
struct lnet_msg *lntmsg, void **new_private);
int kgnilnd_recv(struct lnet_ni *ni, void *private, struct lnet_msg *lntmsg,
int delayed, struct iov_iter *to, unsigned int rlen);
__u16 kgnilnd_cksum_kiov(unsigned int nkiov, struct bio_vec *kiov,
unsigned int offset, unsigned int nob, int dump_blob);
/* purgatory functions */
void kgnilnd_add_purgatory_locked(kgn_conn_t *conn, kgn_peer_t *peer);
void kgnilnd_mark_for_detach_purgatory_all_locked(kgn_peer_t *peer);
void kgnilnd_detach_purgatory_locked(kgn_conn_t *conn, struct list_head *conn_list);
void kgnilnd_release_purgatory_list(struct list_head *conn_list);
void kgnilnd_update_reaper_timeout(long timeout);
void kgnilnd_unmap_buffer(kgn_tx_t *tx, int error);
kgn_tx_t *kgnilnd_new_tx_msg(int type, lnet_nid_t source);
void kgnilnd_tx_done(kgn_tx_t *tx, int completion);
void kgnilnd_txlist_done(struct list_head *txlist, int error);
void kgnilnd_unlink_peer_locked(kgn_peer_t *peer);
int _kgnilnd_schedule_conn(kgn_conn_t *conn, const char *caller, int line, int refheld, int lock_held);
int kgnilnd_schedule_process_conn(kgn_conn_t *conn, int sched_intent);
void kgnilnd_schedule_dgram(kgn_device_t *dev);
int kgnilnd_create_peer_safe(kgn_peer_t **peerp, lnet_nid_t nid, kgn_net_t *net, int node_state);
void kgnilnd_add_peer_locked(lnet_nid_t nid, kgn_peer_t *new_stub_peer, kgn_peer_t **peerp);
int kgnilnd_add_peer(kgn_net_t *net, lnet_nid_t nid, kgn_peer_t **peerp);
kgn_peer_t *kgnilnd_find_peer_locked(lnet_nid_t nid);
int kgnilnd_del_conn_or_peer(kgn_net_t *net, lnet_nid_t nid, int command, int error);
void kgnilnd_peer_increase_reconnect_locked(kgn_peer_t *peer);
void kgnilnd_queue_reply(kgn_conn_t *conn, kgn_tx_t *tx);
void kgnilnd_queue_tx(kgn_conn_t *conn, kgn_tx_t *tx);
void kgnilnd_launch_tx(kgn_tx_t *tx, kgn_net_t *net,
struct lnet_processid *target);
int kgnilnd_send_mapped_tx(kgn_tx_t *tx, int try_map_if_full);
void kgnilnd_consume_rx(kgn_rx_t *rx);
void kgnilnd_schedule_device(kgn_device_t *dev);
void kgnilnd_device_callback(__u32 devid, __u64 arg);
void kgnilnd_schedule_device_timer(cfs_timer_cb_arg_t data);
void kgnilnd_schedule_device_timer_rd(cfs_timer_cb_arg_t data);
int kgnilnd_reaper(void *arg);
int kgnilnd_scheduler(void *arg);
int kgnilnd_dgram_mover(void *arg);
int kgnilnd_rca(void *arg);
int kgnilnd_thread_start(int(*fn)(void *arg), void *arg, char *name, int id);
int kgnilnd_create_conn(kgn_conn_t **connp, kgn_device_t *dev);
int kgnilnd_conn_isdup_locked(kgn_peer_t *peer, kgn_conn_t *newconn);
kgn_conn_t *kgnilnd_find_conn_locked(kgn_peer_t *peer);
int kgnilnd_get_conn(kgn_conn_t **connp, kgn_peer_t);
kgn_conn_t *kgnilnd_find_or_create_conn_locked(kgn_peer_t *peer);
void kgnilnd_peer_cancel_tx_queue(kgn_peer_t *peer);
void kgnilnd_cancel_peer_connect_locked(kgn_peer_t *peer, struct list_head *zombies);
int kgnilnd_close_stale_conns_locked(kgn_peer_t *peer, kgn_conn_t *newconn);
void kgnilnd_peer_alive(kgn_peer_t *peer);
void kgnilnd_peer_notify(kgn_peer_t *peer, int error, int alive);
void kgnilnd_close_conn_locked(kgn_conn_t *conn, int error);
void kgnilnd_close_conn(kgn_conn_t *conn, int error);
void kgnilnd_complete_closed_conn(kgn_conn_t *conn);
void kgnilnd_destroy_conn_ep(kgn_conn_t *conn);
int kgnilnd_close_peer_conns_locked(kgn_peer_t *peer, int why);
int kgnilnd_report_node_state(lnet_nid_t nid, int down);
void kgnilnd_wakeup_rca_thread(void);
int kgnilnd_start_rca_thread(void);
int kgnilnd_get_node_state(__u32 nid);
int kgnilnd_tunables_setup(struct lnet_ni *ni);
int kgnilnd_tunables_init(void);
void kgnilnd_init_msg(kgn_msg_t *msg, int type, lnet_nid_t source);
void kgnilnd_bump_timeouts(__u32 nap_time, char *reason);
void kgnilnd_pause_threads(void);
int kgnilnd_hw_in_quiesce(void);
int kgnilnd_check_hw_quiesce(void);
void kgnilnd_quiesce_wait(char *reason);
void kgnilnd_quiesce_end_callback(gni_nic_handle_t nic_handle, uint64_t msecs);
int kgnilnd_ruhroh_thread(void *arg);
void kgnilnd_reset_stack(void);
void kgnilnd_critical_error(gni_err_handle_t err_handle);
void kgnilnd_insert_sysctl(void);
void kgnilnd_remove_sysctl(void);
void kgnilnd_proc_init(void);
void kgnilnd_proc_fini(void);
/* gnilnd_conn.c */
void kgnilnd_release_mbox(kgn_conn_t *conn, int purgatory_hold);
int kgnilnd_find_and_cancel_dgram(kgn_device_t *dev, lnet_nid_t dst_nid);
void kgnilnd_cancel_dgram_locked(kgn_dgram_t *dgram);
void kgnilnd_release_dgram(kgn_device_t *dev, kgn_dgram_t *dgram, int shutdown);
int kgnilnd_setup_wildcard_dgram(kgn_device_t *dev);
int kgnilnd_cancel_net_dgrams(kgn_net_t *net);
int kgnilnd_cancel_wc_dgrams(kgn_device_t *dev);
int kgnilnd_cancel_dgrams(kgn_device_t *dev);
void kgnilnd_wait_for_canceled_dgrams(kgn_device_t *dev);
int kgnilnd_dgram_waitq(void *arg);
int kgnilnd_set_conn_params(kgn_dgram_t *dgram);
/* struct2str functions - we don't use a default: case to cause the compile
* to fail if there is a missing case. This allows us to hide these down here
* out of the way but ensure we'll catch any updates to the enum/types
* above */
static inline const char *
kgnilnd_fmablk_state2str(kgn_fmablk_state_t state)
{
/* Only want single char string for this */
switch (state) {
case GNILND_FMABLK_IDLE:
return "I";
case GNILND_FMABLK_PHYS:
return "P";
case GNILND_FMABLK_VIRT:
return "V";
case GNILND_FMABLK_FREED:
return "F";
}
return "<unknown state>";
}
static inline const char *
kgnilnd_msgtype2str(int type)
{
switch (type) {
ENUM2STR(GNILND_MSG_NONE);
ENUM2STR(GNILND_MSG_NOOP);
ENUM2STR(GNILND_MSG_IMMEDIATE);
ENUM2STR(GNILND_MSG_PUT_REQ);
ENUM2STR(GNILND_MSG_PUT_NAK);
ENUM2STR(GNILND_MSG_PUT_ACK);
ENUM2STR(GNILND_MSG_PUT_DONE);
ENUM2STR(GNILND_MSG_GET_REQ);
ENUM2STR(GNILND_MSG_GET_NAK);
ENUM2STR(GNILND_MSG_GET_DONE);
ENUM2STR(GNILND_MSG_CLOSE);
ENUM2STR(GNILND_MSG_PUT_REQ_REV);
ENUM2STR(GNILND_MSG_PUT_DONE_REV);
ENUM2STR(GNILND_MSG_PUT_NAK_REV);
ENUM2STR(GNILND_MSG_GET_REQ_REV);
ENUM2STR(GNILND_MSG_GET_ACK_REV);
ENUM2STR(GNILND_MSG_GET_DONE_REV);
ENUM2STR(GNILND_MSG_GET_NAK_REV);
}
return "<unknown msg type>";
}
static inline const char *
kgnilnd_tx_state2str(kgn_tx_list_state_t state)
{
switch (state) {
ENUM2STR(GNILND_TX_IDLE);
ENUM2STR(GNILND_TX_ALLOCD);
ENUM2STR(GNILND_TX_PEERQ);
ENUM2STR(GNILND_TX_MAPQ);
ENUM2STR(GNILND_TX_FMAQ);
ENUM2STR(GNILND_TX_LIVE_FMAQ);
ENUM2STR(GNILND_TX_RDMAQ);
ENUM2STR(GNILND_TX_LIVE_RDMAQ);
ENUM2STR(GNILND_TX_DYING);
ENUM2STR(GNILND_TX_FREED);
}
return "<unknown state>";
}
static inline const char *
kgnilnd_conn_state2str(kgn_conn_t *conn)
{
kgn_conn_state_t state = conn->gnc_state;
switch (state) {
ENUM2STR(GNILND_CONN_DUMMY);
ENUM2STR(GNILND_CONN_LISTEN);
ENUM2STR(GNILND_CONN_CONNECTING);
ENUM2STR(GNILND_CONN_ESTABLISHED);
ENUM2STR(GNILND_CONN_CLOSING);
ENUM2STR(GNILND_CONN_CLOSED);
ENUM2STR(GNILND_CONN_DONE);
ENUM2STR(GNILND_CONN_DESTROY_EP);
}
return "<?state?>";
}
static inline const char *
kgnilnd_connreq_type2str(kgn_connreq_t *connreq)
{
kgn_connreq_type_t type = connreq->gncr_type;
switch (type) {
ENUM2STR(GNILND_CONNREQ_REQ);
ENUM2STR(GNILND_CONNREQ_NAK);
ENUM2STR(GNILND_CONNREQ_CLOSE);
}
return "<?type?>";
}
static inline const char *
kgnilnd_dgram_state2str(kgn_dgram_t *dgram)
{
kgn_dgram_state_t state = dgram->gndg_state;
switch (state) {
ENUM2STR(GNILND_DGRAM_USED);
ENUM2STR(GNILND_DGRAM_POSTING);
ENUM2STR(GNILND_DGRAM_POSTED);
ENUM2STR(GNILND_DGRAM_PROCESSING);
ENUM2STR(GNILND_DGRAM_DONE);
ENUM2STR(GNILND_DGRAM_CANCELED);
}
return "<?state?>";
}
static inline const char *
kgnilnd_dgram_type2str(kgn_dgram_t *dgram)
{
kgn_dgram_type_t type = dgram->gndg_type;
switch (type) {
ENUM2STR(GNILND_DGRAM_REQ);
ENUM2STR(GNILND_DGRAM_WC_REQ);
ENUM2STR(GNILND_DGRAM_NAK);
ENUM2STR(GNILND_DGRAM_CLOSE);
}
return "<?type?>";
}
static inline const char *
kgnilnd_conn_dgram_type2str(kgn_dgram_type_t type)
{
switch (type) {
ENUM2STR(GNILND_DGRAM_REQ);
ENUM2STR(GNILND_DGRAM_WC_REQ);
ENUM2STR(GNILND_DGRAM_NAK);
ENUM2STR(GNILND_DGRAM_CLOSE);
}
return "<?type?>";
}
/* pulls in tunables per platform and adds in nid/nic conversion
* if RCA wasn't available at build time */
#include "gnilnd_hss_ops.h"
/* API wrapper functions - include late to pick up all of the other defines */
#include "gnilnd_api_wrap.h"
#if defined(CONFIG_CRAY_GEMINI)
#include "gnilnd_gemini.h"
#elif defined(CONFIG_CRAY_ARIES)
#include "gnilnd_aries.h"
#else
#error "Undefined Network Hardware Type"
#endif
extern uint32_t kgni_driver_version;
static inline void
kgnilnd_check_kgni_version(void)
{
uint32_t *kdv;
kgnilnd_data.kgn_enable_gl_mutex = 1;
kdv = symbol_get(kgni_driver_version);
if (!kdv) {
LCONSOLE_INFO("Not using thread safe locking -"
" no symbol kgni_driver_version\n");
return;
}
/* Thread-safe kgni implemented in minor ver 0x44/45, code rev 0xb9 */
if (*kdv < GNI_VERSION_CHECK(0, GNILND_KGNI_TS_MINOR_VER, 0xb9)) {
symbol_put(kgni_driver_version);
LCONSOLE_INFO("Not using thread safe locking, gni version 0x%x,"
" need >= 0x%x\n", *kdv,
GNI_VERSION_CHECK(0, GNILND_KGNI_TS_MINOR_VER, 0xb9));
return;
}
symbol_put(kgni_driver_version);
if (!*kgnilnd_tunables.kgn_thread_safe) {
return;
}
/* Use thread-safe locking */
kgnilnd_data.kgn_enable_gl_mutex = 0;
}
#endif /* _GNILND_GNILND_H_ */
