+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
- *
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Basic library routines.
- *
- */
-
-#ifndef _QSWNAL_H
-#define _QSWNAL_H
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
-#include <qsnet/kernel.h>
-#undef printf /* nasty QSW #define */
-
-#include <linux/config.h>
-#include <linux/module.h>
-
-#if MULTIRAIL_EKC
-# include <elan/epcomms.h>
-#else
-# include <elan3/elanregs.h>
-# include <elan3/elandev.h>
-# include <elan3/elanvp.h>
-# include <elan3/elan3mmu.h>
-# include <elan3/elanctxt.h>
-# include <elan3/elandebug.h>
-# include <elan3/urom_addrs.h>
-# include <elan3/busops.h>
-# include <elan3/kcomm.h>
-#endif
-
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/string.h>
-#include <linux/stat.h>
-#include <linux/errno.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#include <linux/locks.h> /* wait_on_buffer */
-#else
-#include <linux/buffer_head.h> /* wait_on_buffer */
-#endif
-#include <linux/unistd.h>
-#include <net/sock.h>
-#include <linux/uio.h>
-
-#include <asm/system.h>
-#include <asm/uaccess.h>
-
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/stat.h>
-#include <linux/list.h>
-#include <linux/sysctl.h>
-#include <asm/segment.h>
-
-#define DEBUG_SUBSYSTEM S_NAL
-
-#include <linux/kp30.h>
-#include <linux/kpr.h>
-#include <portals/p30.h>
-#include <portals/lib-p30.h>
-#include <portals/nal.h>
-
-#define KQSW_CHECKSUM 0
-#if KQSW_CHECKSUM
-typedef unsigned long kqsw_csum_t;
-#define KQSW_CSUM_SIZE (2 * sizeof (kqsw_csum_t))
-#else
-#define KQSW_CSUM_SIZE 0
-#endif
-#define KQSW_HDR_SIZE (sizeof (ptl_hdr_t) + KQSW_CSUM_SIZE)
-
-/*
- * Performance Tuning defines
- * NB no mention of PAGE_SIZE for interoperability
- */
-#define KQSW_MAXPAYLOAD PTL_MTU
-#define KQSW_SMALLPAYLOAD ((4<<10) - KQSW_HDR_SIZE) /* small/large ep receiver breakpoint */
-
-#define KQSW_TX_MAXCONTIG (1<<10) /* largest payload that gets made contiguous on transmit */
-
-#define KQSW_NTXMSGS 8 /* # normal transmit messages */
-#define KQSW_NNBLK_TXMSGS (PAGE_SIZE == 4096 ? 512 : 256) /* # reserved transmit messages if can't block */ /* avoid qsnet crash b=5291 */
-
-#define KQSW_NRXMSGS_LARGE 64 /* # large receive buffers */
-#define KQSW_EP_ENVELOPES_LARGE 256 /* # large ep envelopes */
-
-#define KQSW_NRXMSGS_SMALL 256 /* # small receive buffers */
-#define KQSW_EP_ENVELOPES_SMALL 2048 /* # small ep envelopes */
-
-#define KQSW_RESCHED 100 /* # busy loops that forces scheduler to yield */
-
-#define KQSW_OPTIMIZED_GETS 1 /* optimize gets >= this size */
-#define KQSW_OPTIMIZED_PUTS (32<<10) /* optimize puts >= this size */
-#define KQSW_COPY_SMALL_FWD 0 /* copy small fwd messages to pre-mapped buffer? */
-
-/*
- * derived constants
- */
-
-#define KQSW_TX_BUFFER_SIZE (KQSW_HDR_SIZE + KQSW_TX_MAXCONTIG)
-/* The pre-allocated tx buffer (hdr + small payload) */
-
-#define KQSW_NTXMSGPAGES (btopr(KQSW_TX_BUFFER_SIZE) + 1 + btopr(KQSW_MAXPAYLOAD) + 1)
-/* Reserve elan address space for pre-allocated and pre-mapped transmit
- * buffer and a full payload too. Extra pages allow for page alignment */
-
-#define KQSW_NRXMSGPAGES_SMALL (btopr(KQSW_HDR_SIZE + KQSW_SMALLPAYLOAD))
-/* receive hdr/payload always contiguous and page aligned */
-#define KQSW_NRXMSGBYTES_SMALL (KQSW_NRXMSGPAGES_SMALL * PAGE_SIZE)
-
-#define KQSW_NRXMSGPAGES_LARGE (btopr(KQSW_HDR_SIZE + KQSW_MAXPAYLOAD))
-/* receive hdr/payload always contiguous and page aligned */
-#define KQSW_NRXMSGBYTES_LARGE (KQSW_NRXMSGPAGES_LARGE * PAGE_SIZE)
-/* biggest complete packet we can receive (or transmit) */
-
-/* Remote memory descriptor */
-typedef struct
-{
- __u32 kqrmd_nfrag; /* # frags */
-#if MULTIRAIL_EKC
- EP_NMD kqrmd_frag[0]; /* actual frags */
-#else
- EP_IOVEC kqrmd_frag[0]; /* actual frags */
-#endif
-} kqswnal_remotemd_t;
-
-typedef struct kqswnal_rx
-{
- struct list_head krx_list; /* enqueue -> thread */
- struct kqswnal_rx *krx_alloclist; /* stack in kqn_rxds */
- EP_RCVR *krx_eprx; /* port to post receives to */
- EP_RXD *krx_rxd; /* receive descriptor (for repost) */
-#if MULTIRAIL_EKC
- EP_NMD krx_elanbuffer; /* contiguous Elan buffer */
-#else
- E3_Addr krx_elanbuffer; /* contiguous Elan buffer */
-#endif
- int krx_npages; /* # pages in receive buffer */
- int krx_nob; /* Number Of Bytes received into buffer */
- int krx_rpc_reply_needed; /* peer waiting for EKC RPC reply */
- int krx_rpc_reply_status; /* what status to send */
- int krx_state; /* what this RX is doing */
- atomic_t krx_refcount; /* how to tell when rpc is done */
- kpr_fwd_desc_t krx_fwd; /* embedded forwarding descriptor */
- ptl_kiov_t krx_kiov[KQSW_NRXMSGPAGES_LARGE]; /* buffer frags */
-} kqswnal_rx_t;
-
-#define KRX_POSTED 1 /* receiving */
-#define KRX_PARSE 2 /* ready to be parsed */
-#define KRX_COMPLETING 3 /* waiting to be completed */
-
-
-typedef struct kqswnal_tx
-{
- struct list_head ktx_list; /* enqueue idle/active */
- struct list_head ktx_delayed_list; /* enqueue delayedtxds */
- struct kqswnal_tx *ktx_alloclist; /* stack in kqn_txds */
- unsigned int ktx_isnblk:1; /* reserved descriptor? */
- unsigned int ktx_state:7; /* What I'm doing */
- unsigned int ktx_firsttmpfrag:1; /* ktx_frags[0] is in my ebuffer ? 0 : 1 */
- uint32_t ktx_basepage; /* page offset in reserved elan tx vaddrs for mapping pages */
- int ktx_npages; /* pages reserved for mapping messages */
- int ktx_nmappedpages; /* # pages mapped for current message */
- int ktx_port; /* destination ep port */
- ptl_nid_t ktx_nid; /* destination node */
- void *ktx_args[3]; /* completion passthru */
- char *ktx_buffer; /* pre-allocated contiguous buffer for hdr + small payloads */
- unsigned long ktx_launchtime; /* when (in jiffies) the transmit was launched */
-
- /* debug/info fields */
- pid_t ktx_launcher; /* pid of launching process */
-
- int ktx_nfrag; /* # message frags */
-#if MULTIRAIL_EKC
- int ktx_rail; /* preferred rail */
- EP_NMD ktx_ebuffer; /* elan mapping of ktx_buffer */
- EP_NMD ktx_frags[EP_MAXFRAG];/* elan mapping of msg frags */
-#else
- E3_Addr ktx_ebuffer; /* elan address of ktx_buffer */
- EP_IOVEC ktx_frags[EP_MAXFRAG];/* msg frags (elan vaddrs) */
-#endif
-} kqswnal_tx_t;
-
-#define KTX_IDLE 0 /* on kqn_(nblk_)idletxds */
-#define KTX_FORWARDING 1 /* sending a forwarded packet */
-#define KTX_SENDING 2 /* normal send */
-#define KTX_GETTING 3 /* sending optimised get */
-#define KTX_PUTTING 4 /* sending optimised put */
-#define KTX_RDMAING 5 /* handling optimised put/get */
-
-typedef struct
-{
- /* dynamic tunables... */
- int kqn_optimized_puts; /* optimized PUTs? */
- int kqn_optimized_gets; /* optimized GETs? */
-#if CONFIG_SYSCTL
- struct ctl_table_header *kqn_sysctl; /* sysctl interface */
-#endif
-} kqswnal_tunables_t;
-
-typedef struct
-{
- char kqn_init; /* what's been initialised */
- char kqn_shuttingdown; /* I'm trying to shut down */
- atomic_t kqn_nthreads; /* # threads running */
-
- kqswnal_rx_t *kqn_rxds; /* stack of all the receive descriptors */
- kqswnal_tx_t *kqn_txds; /* stack of all the transmit descriptors */
-
- struct list_head kqn_idletxds; /* transmit descriptors free to use */
- struct list_head kqn_nblk_idletxds; /* reserved free transmit descriptors */
- struct list_head kqn_activetxds; /* transmit descriptors being used */
- spinlock_t kqn_idletxd_lock; /* serialise idle txd access */
- wait_queue_head_t kqn_idletxd_waitq; /* sender blocks here waiting for idle txd */
- struct list_head kqn_idletxd_fwdq; /* forwarded packets block here waiting for idle txd */
- atomic_t kqn_pending_txs; /* # transmits being prepped */
-
- spinlock_t kqn_sched_lock; /* serialise packet schedulers */
- wait_queue_head_t kqn_sched_waitq; /* scheduler blocks here */
-
- struct list_head kqn_readyrxds; /* rxds full of data */
- struct list_head kqn_delayedfwds; /* delayed forwards */
- struct list_head kqn_delayedtxds; /* delayed transmits */
-
-#if MULTIRAIL_EKC
- EP_SYS *kqn_ep; /* elan system */
- EP_NMH *kqn_ep_tx_nmh; /* elan reserved tx vaddrs */
- EP_NMH *kqn_ep_rx_nmh; /* elan reserved rx vaddrs */
-#else
- EP_DEV *kqn_ep; /* elan device */
- ELAN3_DMA_HANDLE *kqn_eptxdmahandle; /* elan reserved tx vaddrs */
- ELAN3_DMA_HANDLE *kqn_eprxdmahandle; /* elan reserved rx vaddrs */
-#endif
- EP_XMTR *kqn_eptx; /* elan transmitter */
- EP_RCVR *kqn_eprx_small; /* elan receiver (small messages) */
- EP_RCVR *kqn_eprx_large; /* elan receiver (large messages) */
- kpr_router_t kqn_router; /* connection to Kernel Portals Router module */
-
- ptl_nid_t kqn_nid_offset; /* this cluster's NID offset */
- int kqn_nnodes; /* this cluster's size */
- int kqn_elanid; /* this nodes's elan ID */
-
- EP_STATUSBLK kqn_rpc_success; /* preset RPC reply status blocks */
- EP_STATUSBLK kqn_rpc_failed;
-} kqswnal_data_t;
-
-/* kqn_init state */
-#define KQN_INIT_NOTHING 0 /* MUST BE ZERO so zeroed state is initialised OK */
-#define KQN_INIT_DATA 1
-#define KQN_INIT_LIB 2
-#define KQN_INIT_ALL 3
-
-extern lib_nal_t kqswnal_lib;
-extern nal_t kqswnal_api;
-extern kqswnal_tunables_t kqswnal_tunables;
-extern kqswnal_data_t kqswnal_data;
-
-extern int kqswnal_thread_start (int (*fn)(void *arg), void *arg);
-extern void kqswnal_rxhandler(EP_RXD *rxd);
-extern int kqswnal_scheduler (void *);
-extern void kqswnal_fwd_packet (void *arg, kpr_fwd_desc_t *fwd);
-extern void kqswnal_rx_done (kqswnal_rx_t *krx);
-
-static inline ptl_nid_t
-kqswnal_elanid2nid (int elanid)
-{
- return (kqswnal_data.kqn_nid_offset + elanid);
-}
-
-static inline int
-kqswnal_nid2elanid (ptl_nid_t nid)
-{
- /* not in this cluster? */
- if (nid < kqswnal_data.kqn_nid_offset ||
- nid >= kqswnal_data.kqn_nid_offset + kqswnal_data.kqn_nnodes)
- return (-1);
-
- return (nid - kqswnal_data.kqn_nid_offset);
-}
-
-static inline ptl_nid_t
-kqswnal_rx_nid(kqswnal_rx_t *krx)
-{
- return (kqswnal_elanid2nid(ep_rxd_node(krx->krx_rxd)));
-}
-
-static inline int
-kqswnal_pages_spanned (void *base, int nob)
-{
- unsigned long first_page = ((unsigned long)base) >> PAGE_SHIFT;
- unsigned long last_page = (((unsigned long)base) + (nob - 1)) >> PAGE_SHIFT;
-
- LASSERT (last_page >= first_page); /* can't wrap address space */
- return (last_page - first_page + 1);
-}
-
-#if KQSW_CHECKSUM
-static inline kqsw_csum_t kqsw_csum (kqsw_csum_t sum, void *base, int nob)
-{
- unsigned char *ptr = (unsigned char *)base;
-
- while (nob-- > 0)
- sum += *ptr++;
-
- return (sum);
-}
-#endif
-
-static inline void kqswnal_rx_decref (kqswnal_rx_t *krx)
-{
- LASSERT (atomic_read (&krx->krx_refcount) > 0);
- if (atomic_dec_and_test (&krx->krx_refcount))
- kqswnal_rx_done(krx);
-}
-
-#if MULTIRAIL_EKC
-# ifndef EP_RAILMASK_ALL
-# error "old (unsupported) version of EKC headers"
-# endif
-#else
-/* multirail defines these in <elan/epcomms.h> */
-#define EP_MSG_SVC_PORTALS_SMALL (0x10) /* Portals over elan port number (large payloads) */
-#define EP_MSG_SVC_PORTALS_LARGE (0x11) /* Portals over elan port number (small payloads) */
-/* NB small/large message sizes are GLOBAL constants */
-
-/* A minimal attempt to minimise inline #ifdeffing */
-
-#define EP_SUCCESS ESUCCESS
-#define EP_ENOMEM ENOMEM
-
-static inline EP_XMTR *
-ep_alloc_xmtr(EP_DEV *e)
-{
- return (ep_alloc_large_xmtr(e));
-}
-
-static inline EP_RCVR *
-ep_alloc_rcvr(EP_DEV *e, int svc, int nenv)
-{
- return (ep_install_large_rcvr(e, svc, nenv));
-}
-
-static inline void
-ep_free_xmtr(EP_XMTR *x)
-{
- ep_free_large_xmtr(x);
-}
-
-static inline void
-ep_free_rcvr(EP_RCVR *r)
-{
- ep_remove_large_rcvr(r);
-}
-#endif
-
-#endif /* _QSWNAL_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff