9b97387c5c
Rename and change the type of of_node to indicate it is a generic pointer which is generally only used for comparison purposes. In a later patch we will put an ACPI/PPTT token pointer in fw_token so that the code which builds the shared cpu masks can be reused. Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Vijaya Kumar K <vkilari@codeaurora.org> Tested-by: Xiongfeng Wang <wangxiongfeng2@huawei.com> Tested-by: Tomasz Nowicki <Tomasz.Nowicki@cavium.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_CACHEINFO_H
|
|
#define _LINUX_CACHEINFO_H
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/smp.h>
|
|
|
|
struct device_node;
|
|
struct attribute;
|
|
|
|
enum cache_type {
|
|
CACHE_TYPE_NOCACHE = 0,
|
|
CACHE_TYPE_INST = BIT(0),
|
|
CACHE_TYPE_DATA = BIT(1),
|
|
CACHE_TYPE_SEPARATE = CACHE_TYPE_INST | CACHE_TYPE_DATA,
|
|
CACHE_TYPE_UNIFIED = BIT(2),
|
|
};
|
|
|
|
/**
|
|
* struct cacheinfo - represent a cache leaf node
|
|
* @id: This cache's id. It is unique among caches with the same (type, level).
|
|
* @type: type of the cache - data, inst or unified
|
|
* @level: represents the hierarchy in the multi-level cache
|
|
* @coherency_line_size: size of each cache line usually representing
|
|
* the minimum amount of data that gets transferred from memory
|
|
* @number_of_sets: total number of sets, a set is a collection of cache
|
|
* lines sharing the same index
|
|
* @ways_of_associativity: number of ways in which a particular memory
|
|
* block can be placed in the cache
|
|
* @physical_line_partition: number of physical cache lines sharing the
|
|
* same cachetag
|
|
* @size: Total size of the cache
|
|
* @shared_cpu_map: logical cpumask representing all the cpus sharing
|
|
* this cache node
|
|
* @attributes: bitfield representing various cache attributes
|
|
* @fw_token: Unique value used to determine if different cacheinfo
|
|
* structures represent a single hardware cache instance.
|
|
* @disable_sysfs: indicates whether this node is visible to the user via
|
|
* sysfs or not
|
|
* @priv: pointer to any private data structure specific to particular
|
|
* cache design
|
|
*
|
|
* While @of_node, @disable_sysfs and @priv are used for internal book
|
|
* keeping, the remaining members form the core properties of the cache
|
|
*/
|
|
struct cacheinfo {
|
|
unsigned int id;
|
|
enum cache_type type;
|
|
unsigned int level;
|
|
unsigned int coherency_line_size;
|
|
unsigned int number_of_sets;
|
|
unsigned int ways_of_associativity;
|
|
unsigned int physical_line_partition;
|
|
unsigned int size;
|
|
cpumask_t shared_cpu_map;
|
|
unsigned int attributes;
|
|
#define CACHE_WRITE_THROUGH BIT(0)
|
|
#define CACHE_WRITE_BACK BIT(1)
|
|
#define CACHE_WRITE_POLICY_MASK \
|
|
(CACHE_WRITE_THROUGH | CACHE_WRITE_BACK)
|
|
#define CACHE_READ_ALLOCATE BIT(2)
|
|
#define CACHE_WRITE_ALLOCATE BIT(3)
|
|
#define CACHE_ALLOCATE_POLICY_MASK \
|
|
(CACHE_READ_ALLOCATE | CACHE_WRITE_ALLOCATE)
|
|
#define CACHE_ID BIT(4)
|
|
void *fw_token;
|
|
bool disable_sysfs;
|
|
void *priv;
|
|
};
|
|
|
|
struct cpu_cacheinfo {
|
|
struct cacheinfo *info_list;
|
|
unsigned int num_levels;
|
|
unsigned int num_leaves;
|
|
bool cpu_map_populated;
|
|
};
|
|
|
|
/*
|
|
* Helpers to make sure "func" is executed on the cpu whose cache
|
|
* attributes are being detected
|
|
*/
|
|
#define DEFINE_SMP_CALL_CACHE_FUNCTION(func) \
|
|
static inline void _##func(void *ret) \
|
|
{ \
|
|
int cpu = smp_processor_id(); \
|
|
*(int *)ret = __##func(cpu); \
|
|
} \
|
|
\
|
|
int func(unsigned int cpu) \
|
|
{ \
|
|
int ret; \
|
|
smp_call_function_single(cpu, _##func, &ret, true); \
|
|
return ret; \
|
|
}
|
|
|
|
struct cpu_cacheinfo *get_cpu_cacheinfo(unsigned int cpu);
|
|
int init_cache_level(unsigned int cpu);
|
|
int populate_cache_leaves(unsigned int cpu);
|
|
|
|
const struct attribute_group *cache_get_priv_group(struct cacheinfo *this_leaf);
|
|
|
|
#endif /* _LINUX_CACHEINFO_H */
|