4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
25 * Copyright (c) 2012, 2013, Intel Corporation.
28 * This file is part of Lustre, http://www.lustre.org/
29 * Lustre is a trademark of Sun Microsystems, Inc.
31 * Please see comments in libcfs/include/libcfs/libcfs_cpu.h for introduction
33 * Author: liang@whamcloud.com
36 #define DEBUG_SUBSYSTEM S_LNET
38 #include <libcfs/libcfs.h>
40 /** Global CPU partition table */
41 struct cfs_cpt_table *cfs_cpt_table __read_mostly = NULL;
42 EXPORT_SYMBOL(cfs_cpt_table);
44 #ifndef HAVE_LIBCFS_CPT
46 #define CFS_CPU_VERSION_MAGIC 0xbabecafe
48 #define CFS_CPT_DISTANCE 1 /* Arbitrary positive value */
50 struct cfs_cpt_table *cfs_cpt_table_alloc(int ncpt)
52 struct cfs_cpt_table *cptab;
55 CERROR("Can't support cpu partition number %d\n", ncpt);
59 LIBCFS_ALLOC(cptab, sizeof(*cptab));
61 cptab->ctb_version = CFS_CPU_VERSION_MAGIC;
62 cpu_set(0, cptab->ctb_cpumask);
63 node_set(0, cptab->ctb_nodemask);
64 cptab->ctb_nparts = ncpt;
69 EXPORT_SYMBOL(cfs_cpt_table_alloc);
71 void cfs_cpt_table_free(struct cfs_cpt_table *cptab)
73 LASSERT(cptab->ctb_version == CFS_CPU_VERSION_MAGIC);
75 LIBCFS_FREE(cptab, sizeof(*cptab));
77 EXPORT_SYMBOL(cfs_cpt_table_free);
79 int cfs_cpt_table_print(struct cfs_cpt_table *cptab, char *buf, int len)
83 rc = snprintf(buf, len, "%d\t: %d\n", 0, 0);
90 EXPORT_SYMBOL(cfs_cpt_table_print);
92 int cfs_cpt_distance_print(struct cfs_cpt_table *cptab, char *buf, int len)
96 rc = snprintf(buf, len, "%d\t: %d:%d\n", 0, CFS_CPT_DISTANCE);
103 EXPORT_SYMBOL(cfs_cpt_distance_print);
105 int cfs_cpt_number(struct cfs_cpt_table *cptab)
109 EXPORT_SYMBOL(cfs_cpt_number);
111 int cfs_cpt_weight(struct cfs_cpt_table *cptab, int cpt)
115 EXPORT_SYMBOL(cfs_cpt_weight);
117 int cfs_cpt_online(struct cfs_cpt_table *cptab, int cpt)
121 EXPORT_SYMBOL(cfs_cpt_online);
123 cpumask_t *cfs_cpt_cpumask(struct cfs_cpt_table *cptab, int cpt)
125 return &cptab->ctb_mask;
127 EXPORT_SYMBOL(cfs_cpt_cpumask);
129 nodemask_t *cfs_cpt_nodemask(struct cfs_cpt_table *cptab, int cpt)
131 return &cptab->ctb_nodemask;
133 EXPORT_SYMBOL(cfs_cpt_nodemask);
135 unsigned cfs_cpt_distance(struct cfs_cpt_table *cptab, int cpt1, int cpt2)
137 return CFS_CPT_DISTANCE;
139 EXPORT_SYMBOL(cfs_cpt_distance);
141 int cfs_cpt_set_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu)
145 EXPORT_SYMBOL(cfs_cpt_set_cpu);
147 void cfs_cpt_unset_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu)
150 EXPORT_SYMBOL(cfs_cpt_unset_cpu);
152 int cfs_cpt_set_cpumask(struct cfs_cpt_table *cptab, int cpt,
153 const cpumask_t *mask)
157 EXPORT_SYMBOL(cfs_cpt_set_cpumask);
159 void cfs_cpt_unset_cpumask(struct cfs_cpt_table *cptab, int cpt,
160 const cpumask_t *mask)
163 EXPORT_SYMBOL(cfs_cpt_unset_cpumask);
165 int cfs_cpt_set_node(struct cfs_cpt_table *cptab, int cpt, int node)
169 EXPORT_SYMBOL(cfs_cpt_set_node);
171 void cfs_cpt_unset_node(struct cfs_cpt_table *cptab, int cpt, int node)
174 EXPORT_SYMBOL(cfs_cpt_unset_node);
176 int cfs_cpt_set_nodemask(struct cfs_cpt_table *cptab, int cpt,
177 const nodemask_t *mask)
181 EXPORT_SYMBOL(cfs_cpt_set_nodemask);
183 void cfs_cpt_unset_nodemask(struct cfs_cpt_table *cptab, int cpt,
184 const nodemask_t *mask)
187 EXPORT_SYMBOL(cfs_cpt_unset_nodemask);
189 int cfs_cpt_spread_node(struct cfs_cpt_table *cptab, int cpt)
193 EXPORT_SYMBOL(cfs_cpt_spread_node);
195 int cfs_cpt_current(struct cfs_cpt_table *cptab, int remap)
199 EXPORT_SYMBOL(cfs_cpt_current);
201 int cfs_cpt_of_cpu(struct cfs_cpt_table *cptab, int cpu)
205 EXPORT_SYMBOL(cfs_cpt_of_cpu);
207 int cfs_cpt_of_node(struct cfs_cpt_table *cptab, int node)
211 EXPORT_SYMBOL(cfs_cpt_of_node);
213 int cfs_cpt_bind(struct cfs_cpt_table *cptab, int cpt)
217 EXPORT_SYMBOL(cfs_cpt_bind);
219 void cfs_cpu_fini(void)
221 if (cfs_cpt_table != NULL) {
222 cfs_cpt_table_free(cfs_cpt_table);
223 cfs_cpt_table = NULL;
227 int cfs_cpu_init(void)
229 cfs_cpt_table = cfs_cpt_table_alloc(1);
231 return cfs_cpt_table != NULL ? 0 : -1;
234 #endif /* HAVE_LIBCFS_CPT */