1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _INTEL_VSEC_H
3#define _INTEL_VSEC_H
4
5#include <linux/auxiliary_bus.h>
6#include <linux/bits.h>
7
8#define VSEC_CAP_TELEMETRY BIT(0)
9#define VSEC_CAP_WATCHER BIT(1)
10#define VSEC_CAP_CRASHLOG BIT(2)
11#define VSEC_CAP_SDSI BIT(3)
12#define VSEC_CAP_TPMI BIT(4)
13
14/* Intel DVSEC offsets */
15#define INTEL_DVSEC_ENTRIES 0xA
16#define INTEL_DVSEC_SIZE 0xB
17#define INTEL_DVSEC_TABLE 0xC
18#define INTEL_DVSEC_TABLE_BAR(x) ((x) & GENMASK(2, 0))
19#define INTEL_DVSEC_TABLE_OFFSET(x) ((x) & GENMASK(31, 3))
20#define TABLE_OFFSET_SHIFT 3
21
22struct pci_dev;
23struct resource;
24
25enum intel_vsec_id {
26 VSEC_ID_TELEMETRY = 2,
27 VSEC_ID_WATCHER = 3,
28 VSEC_ID_CRASHLOG = 4,
29 VSEC_ID_SDSI = 65,
30 VSEC_ID_TPMI = 66,
31};
32
33/**
34 * struct intel_vsec_header - Common fields of Intel VSEC and DVSEC registers.
35 * @rev: Revision ID of the VSEC/DVSEC register space
36 * @length: Length of the VSEC/DVSEC register space
37 * @id: ID of the feature
38 * @num_entries: Number of instances of the feature
39 * @entry_size: Size of the discovery table for each feature
40 * @tbir: BAR containing the discovery tables
41 * @offset: BAR offset of start of the first discovery table
42 */
43struct intel_vsec_header {
44 u8 rev;
45 u16 length;
46 u16 id;
47 u8 num_entries;
48 u8 entry_size;
49 u8 tbir;
50 u32 offset;
51};
52
53enum intel_vsec_quirks {
54 /* Watcher feature not supported */
55 VSEC_QUIRK_NO_WATCHER = BIT(0),
56
57 /* Crashlog feature not supported */
58 VSEC_QUIRK_NO_CRASHLOG = BIT(1),
59
60 /* Use shift instead of mask to read discovery table offset */
61 VSEC_QUIRK_TABLE_SHIFT = BIT(2),
62
63 /* DVSEC not present (provided in driver data) */
64 VSEC_QUIRK_NO_DVSEC = BIT(3),
65
66 /* Platforms requiring quirk in the auxiliary driver */
67 VSEC_QUIRK_EARLY_HW = BIT(4),
68};
69
70/**
71 * struct pmt_callbacks - Callback infrastructure for PMT devices
72 * ->read_telem() when specified, called by client driver to access PMT data (instead
73 * of direct copy).
74 * @pdev: PCI device reference for the callback's use
75 * @guid: ID of data to acccss
76 * @data: buffer for the data to be copied
77 * @off: offset into the requested buffer
78 * @count: size of buffer
79 */
80struct pmt_callbacks {
81 int (*read_telem)(struct pci_dev *pdev, u32 guid, u64 *data, loff_t off, u32 count);
82};
83
84/**
85 * struct intel_vsec_platform_info - Platform specific data
86 * @parent: parent device in the auxbus chain
87 * @headers: list of headers to define the PMT client devices to create
88 * @priv_data: private data, usable by parent devices, currently a callback
89 * @caps: bitmask of PMT capabilities for the given headers
90 * @quirks: bitmask of VSEC device quirks
91 * @base_addr: allow a base address to be specified (rather than derived)
92 */
93struct intel_vsec_platform_info {
94 struct device *parent;
95 struct intel_vsec_header **headers;
96 void *priv_data;
97 unsigned long caps;
98 unsigned long quirks;
99 u64 base_addr;
100};
101
102/**
103 * struct intel_sec_device - Auxbus specific device information
104 * @auxdev: auxbus device struct for auxbus access
105 * @pcidev: pci device associated with the device
106 * @resource: any resources shared by the parent
107 * @ida: id reference
108 * @num_resources: number of resources
109 * @id: xarray id
110 * @priv_data: any private data needed
111 * @quirks: specified quirks
112 * @base_addr: base address of entries (if specified)
113 */
114struct intel_vsec_device {
115 struct auxiliary_device auxdev;
116 struct pci_dev *pcidev;
117 struct resource *resource;
118 struct ida *ida;
119 int num_resources;
120 int id; /* xa */
121 void *priv_data;
122 size_t priv_data_size;
123 unsigned long quirks;
124 u64 base_addr;
125};
126
127int intel_vsec_add_aux(struct pci_dev *pdev, struct device *parent,
128 struct intel_vsec_device *intel_vsec_dev,
129 const char *name);
130
131static inline struct intel_vsec_device *dev_to_ivdev(struct device *dev)
132{
133 return container_of(dev, struct intel_vsec_device, auxdev.dev);
134}
135
136static inline struct intel_vsec_device *auxdev_to_ivdev(struct auxiliary_device *auxdev)
137{
138 return container_of(auxdev, struct intel_vsec_device, auxdev);
139}
140
141#if IS_ENABLED(CONFIG_INTEL_VSEC)
142int intel_vsec_register(struct pci_dev *pdev,
143 struct intel_vsec_platform_info *info);
144#else
145static inline int intel_vsec_register(struct pci_dev *pdev,
146 struct intel_vsec_platform_info *info)
147{
148 return -ENODEV;
149}
150#endif
151#endif
152

source code of linux/include/linux/intel_vsec.h

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