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/*
* 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__ */
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