1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * Basic library routines.
28 # define EXPORT_SYMTAB
31 #ifdef PROPRIETARY_ELAN
32 # include <qsw/kernel.h>
34 # include <qsnet/kernel.h>
37 #undef printf /* nasty QSW #define */
39 #include <linux/config.h>
40 #include <linux/module.h>
42 #include <elan3/elanregs.h>
43 #include <elan3/elandev.h>
44 #include <elan3/elanvp.h>
45 #include <elan3/elan3mmu.h>
46 #include <elan3/elanctxt.h>
47 #include <elan3/elandebug.h>
48 #include <elan3/urom_addrs.h>
49 #include <elan3/busops.h>
50 #include <elan3/kcomm.h>
52 #include <linux/kernel.h>
54 #include <linux/string.h>
55 #include <linux/stat.h>
56 #include <linux/errno.h>
57 #include <linux/locks.h>
58 #include <linux/unistd.h>
60 #include <linux/uio.h>
62 #include <asm/system.h>
63 #include <asm/uaccess.h>
66 #include <linux/file.h>
67 #include <linux/stat.h>
68 #include <linux/list.h>
69 #include <asm/uaccess.h>
70 #include <asm/segment.h>
72 #define DEBUG_SUBSYSTEM S_QSWNAL
74 #include <linux/kp30.h>
75 #include <portals/p30.h>
76 #include <portals/lib-p30.h>
78 #define KQSW_OPTIMIZE_GETS 1
80 #define KQSW_CHECKSUM 0
82 typedef unsigned long kqsw_csum_t;
83 #define KQSW_CSUM_SIZE (2 * sizeof (kqsw_csum_t))
85 #define KQSW_CSUM_SIZE 0
87 #define KQSW_HDR_SIZE (sizeof (ptl_hdr_t) + KQSW_CSUM_SIZE)
92 #define EP_SVC_LARGE_PORTALS_SMALL (0x10) /* Portals over elan port number (large payloads) */
93 #define EP_SVC_LARGE_PORTALS_LARGE (0x11) /* Portals over elan port number (small payloads) */
94 /* NB small/large message sizes are GLOBAL constants */
97 * Performance Tuning defines
98 * NB no mention of PAGE_SIZE for interoperability
100 #define KQSW_MAXPAYLOAD PTL_MTU
101 #define KQSW_SMALLPAYLOAD ((4<<10) - KQSW_HDR_SIZE) /* small/large ep receiver breakpoint */
103 #define KQSW_TX_MAXCONTIG (1<<10) /* largest payload that gets made contiguous on transmit */
105 #define KQSW_NTXMSGS 8 /* # normal transmit messages */
106 #define KQSW_NNBLK_TXMSGS 256 /* # reserved transmit messages if can't block */
108 #define KQSW_NRXMSGS_LARGE 64 /* # large receive buffers */
109 #define KQSW_EP_ENVELOPES_LARGE 128 /* # large ep envelopes */
111 #define KQSW_NRXMSGS_SMALL 256 /* # small receive buffers */
112 #define KQSW_EP_ENVELOPES_SMALL 2048 /* # small ep envelopes */
114 #define KQSW_RESCHED 100 /* # busy loops that forces scheduler to yield */
120 #define KQSW_TX_BUFFER_SIZE (KQSW_HDR_SIZE + KQSW_TX_MAXCONTIG)
121 /* The pre-allocated tx buffer (hdr + small payload) */
123 #define KQSW_NTXMSGPAGES (btopr(KQSW_TX_BUFFER_SIZE) + 1 + btopr(KQSW_MAXPAYLOAD) + 1)
124 /* Reserve elan address space for pre-allocated and pre-mapped transmit
125 * buffer and a full payload too. Extra pages allow for page alignment */
127 #define KQSW_NRXMSGPAGES_SMALL (btopr(KQSW_HDR_SIZE + KQSW_SMALLPAYLOAD))
128 /* receive hdr/payload always contiguous and page aligned */
129 #define KQSW_NRXMSGBYTES_SMALL (KQSW_NRXMSGPAGES_SMALL * PAGE_SIZE)
131 #define KQSW_NRXMSGPAGES_LARGE (btopr(KQSW_HDR_SIZE + KQSW_MAXPAYLOAD))
132 /* receive hdr/payload always contiguous and page aligned */
133 #define KQSW_NRXMSGBYTES_LARGE (KQSW_NRXMSGPAGES_LARGE * PAGE_SIZE)
134 /* biggest complete packet we can receive (or transmit) */
136 /* Remote memory descriptor */
139 __u32 kqrmd_neiov; /* # frags */
140 EP_IOVEC kqrmd_eiov[0]; /* actual frags */
141 } kqswnal_remotemd_t;
145 struct list_head krx_list; /* enqueue -> thread */
146 EP_RCVR *krx_eprx; /* port to post receives to */
147 EP_RXD *krx_rxd; /* receive descriptor (for repost) */
148 E3_Addr krx_elanaddr; /* Elan address of buffer (contiguous in elan vm) */
149 int krx_npages; /* # pages in receive buffer */
150 int krx_nob; /* Number Of Bytes received into buffer */
151 atomic_t krx_refcount; /* who's using me? */
152 int krx_rpc_completed; /* I completed peer's RPC */
153 kpr_fwd_desc_t krx_fwd; /* embedded forwarding descriptor */
154 struct page *krx_pages[KQSW_NRXMSGPAGES_LARGE]; /* pages allocated */
155 struct iovec krx_iov[KQSW_NRXMSGPAGES_LARGE]; /* iovec for forwarding */
160 struct list_head ktx_list; /* enqueue idle/active */
161 struct list_head ktx_delayed_list; /* enqueue delayedtxds */
162 int ktx_isnblk:1; /* reserved descriptor? */
163 int ktx_state:7; /* What I'm doing */
164 uint32_t ktx_basepage; /* page offset in reserved elan tx vaddrs for mapping pages */
165 int ktx_npages; /* pages reserved for mapping messages */
166 int ktx_nmappedpages; /* # pages mapped for current message */
167 int ktx_port; /* destination ep port */
168 ptl_nid_t ktx_nid; /* destination node */
169 void *ktx_args[2]; /* completion passthru */
170 E3_Addr ktx_ebuffer; /* elan address of ktx_buffer */
171 char *ktx_buffer; /* pre-allocated contiguous buffer for hdr + small payloads */
172 unsigned long ktx_launchtime; /* when (in jiffies) the transmit was launched */
174 /* debug/info fields */
175 pid_t ktx_launcher; /* pid of launching process */
176 ptl_hdr_t *ktx_wire_hdr; /* portals header (wire endian) */
178 int ktx_nfrag; /* # message frags */
180 EP_IOVEC iov[EP_MAXFRAG]; /* msg frags (elan vaddrs) */
181 EP_DATAVEC datav[EP_MAXFRAG]; /* DMA frags (eolan vaddrs) */
185 #define KTX_IDLE 0 /* on kqn_(nblk_)idletxds */
186 #define KTX_SENDING 1 /* local send */
187 #define KTX_FORWARDING 2 /* routing a packet */
188 #define KTX_GETTING 3 /* local optimised get */
192 char kqn_init; /* what's been initialised */
193 char kqn_shuttingdown; /* I'm trying to shut down */
194 atomic_t kqn_nthreads; /* # threads still running */
196 kqswnal_rx_t *kqn_rxds; /* all the receive descriptors */
197 kqswnal_tx_t *kqn_txds; /* all the transmit descriptors */
199 struct list_head kqn_idletxds; /* transmit descriptors free to use */
200 struct list_head kqn_nblk_idletxds; /* reserved free transmit descriptors */
201 struct list_head kqn_activetxds; /* transmit descriptors being used */
202 spinlock_t kqn_idletxd_lock; /* serialise idle txd access */
203 wait_queue_head_t kqn_idletxd_waitq; /* sender blocks here waiting for idle txd */
204 struct list_head kqn_idletxd_fwdq; /* forwarded packets block here waiting for idle txd */
206 spinlock_t kqn_sched_lock; /* serialise packet schedulers */
207 wait_queue_head_t kqn_sched_waitq; /* scheduler blocks here */
209 struct list_head kqn_readyrxds; /* rxds full of data */
210 struct list_head kqn_delayedfwds; /* delayed forwards */
211 struct list_head kqn_delayedtxds; /* delayed transmits */
213 spinlock_t kqn_statelock; /* cb_cli/cb_sti */
214 nal_cb_t *kqn_cb; /* -> kqswnal_lib */
215 EP_DEV *kqn_epdev; /* elan device */
216 EP_XMTR *kqn_eptx; /* elan transmitter */
217 EP_RCVR *kqn_eprx_small; /* elan receiver (small messages) */
218 EP_RCVR *kqn_eprx_large; /* elan receiver (large messages) */
219 ELAN3_DMA_HANDLE *kqn_eptxdmahandle; /* elan reserved tx vaddrs */
220 ELAN3_DMA_HANDLE *kqn_eprxdmahandle; /* elan reserved rx vaddrs */
221 kpr_router_t kqn_router; /* connection to Kernel Portals Router module */
223 ptl_nid_t kqn_nid_offset; /* this cluster's NID offset */
224 int kqn_nnodes; /* this cluster's size */
225 int kqn_elanid; /* this nodes's elan ID */
229 #define KQN_INIT_NOTHING 0 /* MUST BE ZERO so zeroed state is initialised OK */
230 #define KQN_INIT_DATA 1
231 #define KQN_INIT_PTL 2
232 #define KQN_INIT_ALL 3
234 extern nal_cb_t kqswnal_lib;
235 extern nal_t kqswnal_api;
236 extern kqswnal_data_t kqswnal_data;
238 extern int kqswnal_thread_start (int (*fn)(void *arg), void *arg);
239 extern void kqswnal_rxhandler(EP_RXD *rxd);
240 extern int kqswnal_scheduler (void *);
241 extern void kqswnal_fwd_packet (void *arg, kpr_fwd_desc_t *fwd);
242 extern void kqswnal_reply_complete (EP_RXD *rxd);
243 extern void kqswnal_requeue_rx (kqswnal_rx_t *krx);
245 static inline ptl_nid_t
246 kqswnal_elanid2nid (int elanid)
248 return (kqswnal_data.kqn_nid_offset + elanid);
252 kqswnal_nid2elanid (ptl_nid_t nid)
254 /* not in this cluster? */
255 if (nid < kqswnal_data.kqn_nid_offset ||
256 nid >= kqswnal_data.kqn_nid_offset + kqswnal_data.kqn_nnodes)
259 return (nid - kqswnal_data.kqn_nid_offset);
263 kqswnal_pages_spanned (void *base, int nob)
265 unsigned long first_page = ((unsigned long)base) >> PAGE_SHIFT;
266 unsigned long last_page = (((unsigned long)base) + (nob - 1)) >> PAGE_SHIFT;
268 LASSERT (last_page >= first_page); /* can't wrap address space */
269 return (last_page - first_page + 1);
273 static inline kqsw_csum_t kqsw_csum (kqsw_csum_t sum, void *base, int nob)
275 unsigned char *ptr = (unsigned char *)base;
284 #endif /* _QSWNAL_H */