1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2003 Los Alamos National Laboratory (LANL)
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.
24 * Portals GM kernel NAL header file
25 * This file makes all declaration and prototypes
26 * for the API side and CB side of the NAL
28 #ifndef __INCLUDE_GMNAL_H__
29 #define __INCLUDE_GMNAL_H__
32 # define EXPORT_SYMTAB
35 #include "linux/config.h"
36 #include "linux/module.h"
37 #include "linux/tty.h"
38 #include "linux/kernel.h"
40 #include "linux/string.h"
41 #include "linux/stat.h"
42 #include "linux/errno.h"
43 #include "linux/locks.h"
44 #include "linux/unistd.h"
45 #include "linux/init.h"
46 #include "linux/sem.h"
47 #include "linux/vmalloc.h"
48 #include "linux/sysctl.h"
50 #define DEBUG_SUBSYSTEM S_GMNAL
52 #include "portals/nal.h"
53 #include "portals/api.h"
54 #include "portals/errno.h"
55 #include "linux/kp30.h"
56 #include "portals/p30.h"
58 #include "portals/nal.h"
59 #include "portals/lib-p30.h"
61 #define GM_STRONG_TYPES 1
66 #include "gm_internal.h"
71 * Defines for the API NAL
75 * Small message size is configurable
76 * insmod can set small_msg_size
77 * which is used to populate nal_data.small_msg_size
79 #define GMNAL_SMALL_MESSAGE 1078
80 #define GMNAL_LARGE_MESSAGE_INIT 1079
81 #define GMNAL_LARGE_MESSAGE_ACK 1080
82 #define GMNAL_LARGE_MESSAGE_FINI 1081
84 extern int gmnal_small_msg_size;
85 extern int num_rx_threads;
88 #define GMNAL_SMALL_MSG_SIZE(a) a->small_msg_size
89 #define GMNAL_IS_SMALL_MESSAGE(n,a,b,c) gmnal_is_small_msg(n, a, b, c)
90 #define GMNAL_MAGIC 0x1234abcd
92 * The gm_port to use for gmnal
94 #define GMNAL_GM_PORT gm_port
98 * Small Transmit Descriptor
99 * A structre to keep track of a small transmit operation
100 * This structure has a one-to-one relationship with a small
101 * transmit buffer (both create by gmnal_stxd_alloc).
102 * There are two free list of stxd. One for use by clients of the NAL
103 * and the other by the NAL rxthreads when doing sends.
104 * This helps prevent deadlock caused by stxd starvation.
106 typedef struct _gmnal_stxd_t {
114 struct _gmnal_data_t *nal_data;
117 struct iovec iov[PTL_MD_MAX_IOV];
118 struct _gmnal_stxd_t *next;
121 struct iovec *iovec_dup;
125 * keeps a transmit token for large transmit (gm_get)
126 * and a pointer to rxd that is used as context for large receive
128 typedef struct _gmnal_ltxd_t {
129 struct _gmnal_ltxd_t *next;
130 struct _gmnal_srxd_t *srxd;
135 * as for gmnal_stxd_t
136 * a hash table in nal_data find srxds from
137 * the rx buffer address. hash table populated at init time
139 typedef struct _gmnal_srxd_t {
143 unsigned int gm_source_node;
144 gmnal_stxd_t *source_stxd;
150 spinlock_t callback_lock;
153 struct _gmnal_srxd_t *next;
154 struct _gmnal_data_t *nal_data;
158 * Header which lmgnal puts at the start of each message
160 typedef struct _gmnal_msghdr {
163 unsigned int sender_node_id;
167 #define GMNAL_MSGHDR_SIZE sizeof(gmnal_msghdr_t)
170 * the caretaker thread (ct_thread) gets receive events
171 * (and other events) from the myrinet device via the GM2 API.
172 * caretaker thread populates one work entry for each receive event,
173 * puts it on a Q in nal_data and wakes a receive thread to
174 * process the receive.
175 * Processing a portals receive can involve a transmit operation.
176 * Because of this the caretaker thread cannot process receives
177 * as it may get deadlocked when supply of transmit descriptors
178 * is exhausted (as caretaker thread is responsible for replacing
179 * transmit descriptors on the free list)
181 typedef struct _gmnal_rxtwe {
187 struct _gmnal_rxtwe *next;
191 * 1 receive thread started on each CPU
193 #define NRXTHREADS 10 /* max number of receiver threads */
195 typedef struct _gmnal_data_t {
196 spinlock_t stxd_lock;
197 struct semaphore stxd_token;
199 spinlock_t rxt_stxd_lock;
200 struct semaphore rxt_stxd_token;
201 gmnal_stxd_t *rxt_stxd;
202 spinlock_t ltxd_lock;
203 struct semaphore ltxd_token;
205 spinlock_t srxd_lock;
206 struct semaphore srxd_token;
208 struct gm_hash *srxd_hash;
211 struct gm_port *gm_port;
212 unsigned int gm_local_nid;
213 unsigned int gm_global_nid;
215 long rxthread_pid[NRXTHREADS];
216 int rxthread_stop_flag;
217 spinlock_t rxthread_flag_lock;
221 gm_alarm_t ctthread_alarm;
223 int small_msg_gmsize;
224 gmnal_rxtwe_t *rxtwe_head;
225 gmnal_rxtwe_t *rxtwe_tail;
226 spinlock_t rxtwe_lock;
227 struct semaphore rxtwe_wait;
228 struct ctl_table_header *sysctl;
232 * Flags to start/stop and check status of threads
233 * each rxthread sets 1 bit (any bit) of the flag on startup
234 * and clears 1 bit when exiting
236 #define GMNAL_THREAD_RESET 0
237 #define GMNAL_THREAD_STOP 666
238 #define GMNAL_CTTHREAD_STARTED 333
239 #define GMNAL_RXTHREADS_STARTED ( (1<<num_rx_threads)-1)
242 extern gmnal_data_t *global_nal_data;
247 #define GMNAL_IOC_GET_GNID 1
252 #define GMNAL_STATUS_OK 0
253 #define GMNAL_STATUS_FAIL 1
254 #define GMNAL_STATUS_NOMEM 2
258 * FUNCTION PROTOTYPES
266 * For the Small tx and rx descriptor lists
268 #define GMNAL_TXD_LOCK_INIT(a) spin_lock_init(&a->stxd_lock);
269 #define GMNAL_TXD_LOCK(a) spin_lock(&a->stxd_lock);
270 #define GMNAL_TXD_UNLOCK(a) spin_unlock(&a->stxd_lock);
271 #define GMNAL_TXD_TOKEN_INIT(a, n) sema_init(&a->stxd_token, n);
272 #define GMNAL_TXD_GETTOKEN(a) down(&a->stxd_token);
273 #define GMNAL_TXD_TRYGETTOKEN(a) down_trylock(&a->stxd_token)
274 #define GMNAL_TXD_RETURNTOKEN(a) up(&a->stxd_token);
276 #define GMNAL_RXT_TXD_LOCK_INIT(a) spin_lock_init(&a->rxt_stxd_lock);
277 #define GMNAL_RXT_TXD_LOCK(a) spin_lock(&a->rxt_stxd_lock);
278 #define GMNAL_RXT_TXD_UNLOCK(a) spin_unlock(&a->rxt_stxd_lock);
279 #define GMNAL_RXT_TXD_TOKEN_INIT(a, n) sema_init(&a->rxt_stxd_token, n);
280 #define GMNAL_RXT_TXD_GETTOKEN(a) down(&a->rxt_stxd_token);
281 #define GMNAL_RXT_TXD_TRYGETTOKEN(a) down_trylock(&a->rxt_stxd_token)
282 #define GMNAL_RXT_TXD_RETURNTOKEN(a) up(&a->rxt_stxd_token);
284 #define GMNAL_LTXD_LOCK_INIT(a) spin_lock_init(&a->ltxd_lock);
285 #define GMNAL_LTXD_LOCK(a) spin_lock(&a->ltxd_lock);
286 #define GMNAL_LTXD_UNLOCK(a) spin_unlock(&a->ltxd_lock);
287 #define GMNAL_LTXD_TOKEN_INIT(a, n) sema_init(&a->ltxd_token, n);
288 #define GMNAL_LTXD_GETTOKEN(a) down(&a->ltxd_token);
289 #define GMNAL_LTXD_TRYGETTOKEN(a) down_trylock(&a->ltxd_token)
290 #define GMNAL_LTXD_RETURNTOKEN(a) up(&a->ltxd_token);
292 #define GMNAL_RXD_LOCK_INIT(a) spin_lock_init(&a->srxd_lock);
293 #define GMNAL_RXD_LOCK(a) spin_lock(&a->srxd_lock);
294 #define GMNAL_RXD_UNLOCK(a) spin_unlock(&a->srxd_lock);
295 #define GMNAL_RXD_TOKEN_INIT(a, n) sema_init(&a->srxd_token, n);
296 #define GMNAL_RXD_GETTOKEN(a) down(&a->srxd_token);
297 #define GMNAL_RXD_TRYGETTOKEN(a) down_trylock(&a->srxd_token)
298 #define GMNAL_RXD_RETURNTOKEN(a) up(&a->srxd_token);
300 #define GMNAL_GM_LOCK_INIT(a) spin_lock_init(&a->gm_lock);
301 #define GMNAL_GM_LOCK(a) spin_lock(&a->gm_lock);
302 #define GMNAL_GM_UNLOCK(a) spin_unlock(&a->gm_lock);
312 int gmnal_api_startup(nal_t *, ptl_pid_t,
313 ptl_ni_limits_t *, ptl_ni_limits_t *);
315 int gmnal_api_forward(nal_t *, int, void *, size_t, void *, size_t);
317 void gmnal_api_shutdown(nal_t *);
319 int gmnal_api_validate(nal_t *, void *, size_t);
321 void gmnal_api_yield(nal_t *, unsigned long *, int);
323 void gmnal_api_lock(nal_t *, unsigned long *);
325 void gmnal_api_unlock(nal_t *, unsigned long *);
328 #define GMNAL_INIT_NAL(a) do { \
329 (a)->nal_ni_init = gmnal_api_startup; \
330 (a)->nal_ni_fini = gmnal_api_shutdown; \
331 (a)->nal_data = NULL; \
339 ptl_err_t gmnal_cb_send(lib_nal_t *, void *, lib_msg_t *, ptl_hdr_t *,
340 int, ptl_nid_t, ptl_pid_t, unsigned int, struct iovec *, size_t, size_t);
342 ptl_err_t gmnal_cb_send_pages(lib_nal_t *, void *, lib_msg_t *, ptl_hdr_t *,
343 int, ptl_nid_t, ptl_pid_t, unsigned int, ptl_kiov_t *, size_t, size_t);
345 ptl_err_t gmnal_cb_recv(lib_nal_t *, void *, lib_msg_t *,
346 unsigned int, struct iovec *, size_t, size_t, size_t);
348 ptl_err_t gmnal_cb_recv_pages(lib_nal_t *, void *, lib_msg_t *,
349 unsigned int, ptl_kiov_t *, size_t, size_t, size_t);
351 int gmnal_cb_dist(lib_nal_t *, ptl_nid_t, unsigned long *);
353 int gmnal_init(void);
355 void gmnal_fini(void);
359 #define GMNAL_INIT_NAL_CB(a) do { \
360 a->libnal_send = gmnal_cb_send; \
361 a->libnal_send_pages = gmnal_cb_send_pages; \
362 a->libnal_recv = gmnal_cb_recv; \
363 a->libnal_recv_pages = gmnal_cb_recv_pages; \
364 a->libnal_map = NULL; \
365 a->libnal_unmap = NULL; \
366 a->libnal_dist = gmnal_cb_dist; \
367 a->libnal_data = NULL; \
372 * Small and Large Transmit and Receive Descriptor Functions
374 int gmnal_alloc_txd(gmnal_data_t *);
375 void gmnal_free_txd(gmnal_data_t *);
376 gmnal_stxd_t* gmnal_get_stxd(gmnal_data_t *, int);
377 void gmnal_return_stxd(gmnal_data_t *, gmnal_stxd_t *);
378 gmnal_ltxd_t* gmnal_get_ltxd(gmnal_data_t *);
379 void gmnal_return_ltxd(gmnal_data_t *, gmnal_ltxd_t *);
381 int gmnal_alloc_srxd(gmnal_data_t *);
382 void gmnal_free_srxd(gmnal_data_t *);
383 gmnal_srxd_t* gmnal_get_srxd(gmnal_data_t *, int);
384 void gmnal_return_srxd(gmnal_data_t *, gmnal_srxd_t *);
387 * general utility functions
389 gmnal_srxd_t *gmnal_rxbuffer_to_srxd(gmnal_data_t *, void*);
390 void gmnal_stop_rxthread(gmnal_data_t *);
391 void gmnal_stop_ctthread(gmnal_data_t *);
392 void gmnal_small_tx_callback(gm_port_t *, void *, gm_status_t);
393 void gmnal_drop_sends_callback(gm_port_t *, void *, gm_status_t);
394 void gmnal_resume_sending_callback(gm_port_t *, void *, gm_status_t);
395 char *gmnal_gm_error(gm_status_t);
396 char *gmnal_rxevent(gm_recv_event_t*);
397 int gmnal_is_small_msg(gmnal_data_t*, int, struct iovec*, int);
398 void gmnal_yield(int);
399 int gmnal_start_kernel_threads(gmnal_data_t *);
403 * Communication functions
409 int gmnal_ct_thread(void *); /* caretaker thread */
410 int gmnal_rx_thread(void *); /* receive thread */
411 int gmnal_pre_receive(gmnal_data_t*, gmnal_rxtwe_t*, int);
412 int gmnal_rx_bad(gmnal_data_t *, gmnal_rxtwe_t *, gmnal_srxd_t*);
413 int gmnal_rx_requeue_buffer(gmnal_data_t *, gmnal_srxd_t *);
414 int gmnal_add_rxtwe(gmnal_data_t *, gm_recv_t *);
415 gmnal_rxtwe_t * gmnal_get_rxtwe(gmnal_data_t *);
416 void gmnal_remove_rxtwe(gmnal_data_t *);
422 int gmnal_small_rx(lib_nal_t *, void *, lib_msg_t *, unsigned int,
423 struct iovec *, size_t, size_t, size_t);
424 int gmnal_small_tx(lib_nal_t *, void *, lib_msg_t *, ptl_hdr_t *,
425 int, ptl_nid_t, ptl_pid_t,
426 unsigned int, struct iovec*, size_t, int);
427 void gmnal_small_tx_callback(gm_port_t *, void *, gm_status_t);
434 int gmnal_large_rx(lib_nal_t *, void *, lib_msg_t *, unsigned int,
435 struct iovec *, size_t, size_t, size_t);
437 int gmnal_large_tx(lib_nal_t *, void *, lib_msg_t *, ptl_hdr_t *,
438 int, ptl_nid_t, ptl_pid_t, unsigned int,
439 struct iovec*, size_t, int);
441 void gmnal_large_tx_callback(gm_port_t *, void *, gm_status_t);
443 int gmnal_remote_get(gmnal_srxd_t *, int, struct iovec*, int,
446 void gmnal_remote_get_callback(gm_port_t *, void *, gm_status_t);
448 int gmnal_copyiov(int, gmnal_srxd_t *, int, struct iovec*, int,
451 void gmnal_large_tx_ack(gmnal_data_t *, gmnal_srxd_t *);
452 void gmnal_large_tx_ack_callback(gm_port_t *, void *, gm_status_t);
453 void gmnal_large_tx_ack_received(gmnal_data_t *, gmnal_srxd_t *);
455 #endif /*__INCLUDE_GMNAL_H__*/