diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/linux/linux-cpu.h')
| -rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/linux/linux-cpu.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/linux/linux-cpu.h b/drivers/staging/lustre/include/linux/libcfs/linux/linux-cpu.h new file mode 100644 index 000000000000..224371c92f7c --- /dev/null +++ b/drivers/staging/lustre/include/linux/libcfs/linux/linux-cpu.h @@ -0,0 +1,175 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program 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 version 2 for more details (a copy is included + * in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA + * + * GPL HEADER END + */ +/* + * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * libcfs/include/libcfs/linux/linux-mem.h + * + * Basic library routines. + * + * Author: liang@whamcloud.com + */ + +#ifndef __LIBCFS_LINUX_CPU_H__ +#define __LIBCFS_LINUX_CPU_H__ + +#ifndef __LIBCFS_LIBCFS_H__ +#error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead +#endif + + +#include <linux/cpu.h> +#include <linux/cpuset.h> +#include <linux/topology.h> +#include <linux/version.h> + + +#ifdef CONFIG_SMP + +#define HAVE_LIBCFS_CPT + +/** virtual processing unit */ +struct cfs_cpu_partition { + /* CPUs mask for this partition */ + cpumask_t *cpt_cpumask; + /* nodes mask for this partition */ + nodemask_t *cpt_nodemask; + /* spread rotor for NUMA allocator */ + unsigned cpt_spread_rotor; +}; + +/** descriptor for CPU partitions */ +struct cfs_cpt_table { + /* version, reserved for hotplug */ + unsigned ctb_version; + /* spread rotor for NUMA allocator */ + unsigned ctb_spread_rotor; + /* # of CPU partitions */ + unsigned ctb_nparts; + /* partitions tables */ + struct cfs_cpu_partition *ctb_parts; + /* shadow HW CPU to CPU partition ID */ + int *ctb_cpu2cpt; + /* all cpus in this partition table */ + cpumask_t *ctb_cpumask; + /* all nodes in this partition table */ + nodemask_t *ctb_nodemask; +}; + +void cfs_cpu_core_siblings(int cpu, cpumask_t *mask); +void cfs_cpu_ht_siblings(int cpu, cpumask_t *mask); +void cfs_node_to_cpumask(int node, cpumask_t *mask); +int cfs_cpu_core_nsiblings(int cpu); +int cfs_cpu_ht_nsiblings(int cpu); + +/** + * comment out definitions for compatible layer + * #define CFS_CPU_NR NR_CPUS + * + * typedef cpumask_t cfs_cpumask_t; + * + * #define cfs_cpu_current() smp_processor_id() + * #define cfs_cpu_online(i) cpu_online(i) + * #define cfs_cpu_online_num() num_online_cpus() + * #define cfs_cpu_online_for_each(i) for_each_online_cpu(i) + * #define cfs_cpu_possible_num() num_possible_cpus() + * #define cfs_cpu_possible_for_each(i) for_each_possible_cpu(i) + * + * #ifdef CONFIG_CPUMASK_SIZE + * #define cfs_cpu_mask_size() cpumask_size() + * #else + * #define cfs_cpu_mask_size() sizeof(cfs_cpumask_t) + * #endif + * + * #define cfs_cpu_mask_set(i, mask) cpu_set(i, mask) + * #define cfs_cpu_mask_unset(i, mask) cpu_clear(i, mask) + * #define cfs_cpu_mask_isset(i, mask) cpu_isset(i, mask) + * #define cfs_cpu_mask_clear(mask) cpus_clear(mask) + * #define cfs_cpu_mask_empty(mask) cpus_empty(mask) + * #define cfs_cpu_mask_weight(mask) cpus_weight(mask) + * #define cfs_cpu_mask_first(mask) first_cpu(mask) + * #define cfs_cpu_mask_any_online(mask) (any_online_cpu(mask) != NR_CPUS) + * #define cfs_cpu_mask_for_each(i, mask) for_each_cpu_mask(i, mask) + * #define cfs_cpu_mask_bind(t, mask) set_cpus_allowed(t, mask) + * + * #ifdef HAVE_CPUMASK_COPY + * #define cfs_cpu_mask_copy(dst, src) cpumask_copy(dst, src) + * #else + * #define cfs_cpu_mask_copy(dst, src) memcpy(dst, src, sizeof(*src)) + * #endif + * + * static inline void + * cfs_cpu_mask_of_online(cfs_cpumask_t *mask) + * { + * cfs_cpu_mask_copy(mask, &cpu_online_map); + * } + * + * #ifdef CONFIG_NUMA + * + * #define CFS_NODE_NR MAX_NUMNODES + * + * typedef nodemask_t cfs_node_mask_t; + * + * #define cfs_node_of_cpu(cpu) cpu_to_node(cpu) + * #define cfs_node_online(i) node_online(i) + * #define cfs_node_online_num() num_online_nodes() + * #define cfs_node_online_for_each(i) for_each_online_node(i) + * #define cfs_node_possible_num() num_possible_nodes() + * #define cfs_node_possible_for_each(i) for_each_node(i) + * + * static inline void cfs_node_to_cpumask(int node, cfs_cpumask_t *mask) + * { + * #if defined(HAVE_NODE_TO_CPUMASK) + * *mask = node_to_cpumask(node); + * #elif defined(HAVE_CPUMASK_OF_NODE) + * cfs_cpu_mask_copy(mask, cpumask_of_node(node)); + * #else + * # error "Needs node_to_cpumask or cpumask_of_node" + * #endif + * } + * + * #define cfs_node_mask_set(i, mask) node_set(i, mask) + * #define cfs_node_mask_unset(i, mask) node_clear(i, mask) + * #define cfs_node_mask_isset(i, mask) node_isset(i, mask) + * #define cfs_node_mask_clear(mask) nodes_reset(mask) + * #define cfs_node_mask_empty(mask) nodes_empty(mask) + * #define cfs_node_mask_weight(mask) nodes_weight(mask) + * #define cfs_node_mask_for_each(i, mask) for_each_node_mask(i, mask) + * #define cfs_node_mask_copy(dst, src) memcpy(dst, src, sizeof(*src)) + * + * static inline void + * cfs_node_mask_of_online(cfs_node_mask_t *mask) + * { + * cfs_node_mask_copy(mask, &node_online_map); + * } + * + * #endif + */ + +#endif /* CONFIG_SMP */ +#endif /* __LIBCFS_LINUX_CPU_H__ */ |