1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2025 Arm Ltd. */
#ifndef __LINUX_ARM_MPAM_H
#define __LINUX_ARM_MPAM_H
#include <linux/acpi.h>
#include <linux/types.h>
struct mpam_msc;
enum mpam_msc_iface {
MPAM_IFACE_MMIO, /* a real MPAM MSC */
MPAM_IFACE_PCC, /* a fake MPAM MSC */
};
enum mpam_class_types {
MPAM_CLASS_CACHE, /* Caches, e.g. L2, L3 */
MPAM_CLASS_MEMORY, /* Main memory */
MPAM_CLASS_UNKNOWN, /* Everything else, e.g. SMMU */
};
#define MPAM_CLASS_ID_DEFAULT 255
#ifdef CONFIG_ACPI_MPAM
int acpi_mpam_parse_resources(struct mpam_msc *msc,
struct acpi_mpam_msc_node *tbl_msc);
int acpi_mpam_count_msc(void);
#else
static inline int acpi_mpam_parse_resources(struct mpam_msc *msc,
struct acpi_mpam_msc_node *tbl_msc)
{
return -EINVAL;
}
static inline int acpi_mpam_count_msc(void) { return -EINVAL; }
#endif
#ifdef CONFIG_ARM64_MPAM_DRIVER
int mpam_ris_create(struct mpam_msc *msc, u8 ris_idx,
enum mpam_class_types type, u8 class_id, int component_id);
#else
static inline int mpam_ris_create(struct mpam_msc *msc, u8 ris_idx,
enum mpam_class_types type, u8 class_id,
int component_id)
{
return -EINVAL;
}
#endif
/**
* mpam_register_requestor() - Register a requestor with the MPAM driver
* @partid_max: The maximum PARTID value the requestor can generate.
* @pmg_max: The maximum PMG value the requestor can generate.
*
* Registers a requestor with the MPAM driver to ensure the chosen system-wide
* minimum PARTID and PMG values will allow the requestors features to be used.
*
* Returns an error if the registration is too late, and a larger PARTID/PMG
* value has been advertised to user-space. In this case the requestor should
* not use its MPAM features. Returns 0 on success.
*/
int mpam_register_requestor(u16 partid_max, u8 pmg_max);
#endif /* __LINUX_ARM_MPAM_H */
|
