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).
19 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
20 * Copyright (c) 2012, 2017, Intel Corporation.
23 * This file is part of Lustre, http://www.lustre.org/
24 * Lustre is a trademark of Sun Microsystems, Inc.
26 * Please see comments in libcfs/include/libcfs/libcfs_cpu.h for introduction
28 * Author: liang@whamcloud.com
31 #define DEBUG_SUBSYSTEM S_LNET
33 #include <libcfs/linux/linux-cpu.h>
34 #include <libcfs/libcfs.h>
36 /** Global CPU partition table */
37 struct cfs_cpt_table *cfs_cpt_table __read_mostly;
38 EXPORT_SYMBOL(cfs_cpt_table);
42 #define CFS_CPT_DISTANCE 1 /* Arbitrary positive value */
44 struct cfs_cpt_table *cfs_cpt_table_alloc(int ncpt)
46 struct cfs_cpt_table *cptab;
49 CERROR("Can't support cpu partition number %d\n", ncpt);
53 LIBCFS_ALLOC(cptab, sizeof(*cptab));
57 cpumask_set_cpu(0, cptab->ctb_cpumask);
58 node_set(0, cptab->ctb_nodemask);
62 EXPORT_SYMBOL(cfs_cpt_table_alloc);
64 void cfs_cpt_table_free(struct cfs_cpt_table *cptab)
66 LIBCFS_FREE(cptab, sizeof(*cptab));
68 EXPORT_SYMBOL(cfs_cpt_table_free);
70 int cfs_cpt_table_print(struct cfs_cpt_table *cptab, char *buf, int len)
74 rc = snprintf(buf, len, "%d\t: %d\n", 0, 0);
81 EXPORT_SYMBOL(cfs_cpt_table_print);
83 int cfs_cpt_distance_print(struct cfs_cpt_table *cptab, char *buf, int len)
87 rc = snprintf(buf, len, "0\t: 0:%d\n", CFS_CPT_DISTANCE);
94 EXPORT_SYMBOL(cfs_cpt_distance_print);
96 int cfs_cpt_number(struct cfs_cpt_table *cptab)
100 EXPORT_SYMBOL(cfs_cpt_number);
102 int cfs_cpt_weight(struct cfs_cpt_table *cptab, int cpt)
106 EXPORT_SYMBOL(cfs_cpt_weight);
108 int cfs_cpt_online(struct cfs_cpt_table *cptab, int cpt)
112 EXPORT_SYMBOL(cfs_cpt_online);
114 cpumask_t *cfs_cpt_cpumask(struct cfs_cpt_table *cptab, int cpt)
116 return &cptab->ctb_cpumask;
118 EXPORT_SYMBOL(cfs_cpt_cpumask);
120 nodemask_t *cfs_cpt_nodemask(struct cfs_cpt_table *cptab, int cpt)
122 return &cptab->ctb_nodemask;
124 EXPORT_SYMBOL(cfs_cpt_nodemask);
126 unsigned int cfs_cpt_distance(struct cfs_cpt_table *cptab, int cpt1, int cpt2)
128 return CFS_CPT_DISTANCE;
130 EXPORT_SYMBOL(cfs_cpt_distance);
132 int cfs_cpt_set_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu)
136 EXPORT_SYMBOL(cfs_cpt_set_cpu);
138 void cfs_cpt_unset_cpu(struct cfs_cpt_table *cptab, int cpt, int cpu)
141 EXPORT_SYMBOL(cfs_cpt_unset_cpu);
143 int cfs_cpt_set_cpumask(struct cfs_cpt_table *cptab, int cpt,
144 const cpumask_t *mask)
148 EXPORT_SYMBOL(cfs_cpt_set_cpumask);
150 void cfs_cpt_unset_cpumask(struct cfs_cpt_table *cptab, int cpt,
151 const cpumask_t *mask)
154 EXPORT_SYMBOL(cfs_cpt_unset_cpumask);
156 int cfs_cpt_set_node(struct cfs_cpt_table *cptab, int cpt, int node)
160 EXPORT_SYMBOL(cfs_cpt_set_node);
162 void cfs_cpt_unset_node(struct cfs_cpt_table *cptab, int cpt, int node)
165 EXPORT_SYMBOL(cfs_cpt_unset_node);
167 int cfs_cpt_set_nodemask(struct cfs_cpt_table *cptab, int cpt,
168 const nodemask_t *mask)
172 EXPORT_SYMBOL(cfs_cpt_set_nodemask);
174 void cfs_cpt_unset_nodemask(struct cfs_cpt_table *cptab, int cpt,
175 const nodemask_t *mask)
178 EXPORT_SYMBOL(cfs_cpt_unset_nodemask);
180 int cfs_cpt_spread_node(struct cfs_cpt_table *cptab, int cpt)
184 EXPORT_SYMBOL(cfs_cpt_spread_node);
186 int cfs_cpt_current(struct cfs_cpt_table *cptab, int remap)
190 EXPORT_SYMBOL(cfs_cpt_current);
192 int cfs_cpt_of_cpu(struct cfs_cpt_table *cptab, int cpu)
196 EXPORT_SYMBOL(cfs_cpt_of_cpu);
198 int cfs_cpt_of_node(struct cfs_cpt_table *cptab, int node)
202 EXPORT_SYMBOL(cfs_cpt_of_node);
204 int cfs_cpt_bind(struct cfs_cpt_table *cptab, int cpt)
208 EXPORT_SYMBOL(cfs_cpt_bind);
210 void cfs_cpu_fini(void)
213 cfs_cpt_table_free(cfs_cpt_table);
214 cfs_cpt_table = NULL;
218 int cfs_cpu_init(void)
220 cfs_cpt_table = cfs_cpt_table_alloc(1);
222 return cfs_cpt_table ? 0 : -1;
225 #endif /* !CONFIG_SMP */