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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
// SPDX-License-Identifier: GPL-2.0
/*
* Intel(R) Trace Hub pci driver
*
* Copyright (C) 2014-2015 Intel Corporation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/pci.h>
#include "intel_th.h"
#define DRIVER_NAME "intel_th_pci"
#define BAR_MASK (BIT(TH_MMIO_CONFIG) | BIT(TH_MMIO_SW))
#define PCI_REG_NPKDSC 0x80
#define NPKDSC_TSACT BIT(5)
static int intel_th_pci_activate(struct intel_th *th)
{
struct pci_dev *pdev = to_pci_dev(th->dev);
u32 npkdsc;
int err;
if (!INTEL_TH_CAP(th, tscu_enable))
return 0;
err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
if (!err) {
npkdsc |= NPKDSC_TSACT;
err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
}
if (err)
dev_err(&pdev->dev, "failed to read NPKDSC register\n");
return err;
}
static void intel_th_pci_deactivate(struct intel_th *th)
{
struct pci_dev *pdev = to_pci_dev(th->dev);
u32 npkdsc;
int err;
if (!INTEL_TH_CAP(th, tscu_enable))
return;
err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
if (!err) {
npkdsc |= NPKDSC_TSACT;
err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
}
if (err)
dev_err(&pdev->dev, "failed to read NPKDSC register\n");
}
static int intel_th_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct intel_th_drvdata *drvdata = (void *)id->driver_data;
struct intel_th *th;
int err;
err = pcim_enable_device(pdev);
if (err)
return err;
err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
if (err)
return err;
th = intel_th_alloc(&pdev->dev, drvdata, pdev->resource,
DEVICE_COUNT_RESOURCE, pdev->irq);
if (IS_ERR(th))
return PTR_ERR(th);
th->activate = intel_th_pci_activate;
th->deactivate = intel_th_pci_deactivate;
pci_set_master(pdev);
return 0;
}
static void intel_th_pci_remove(struct pci_dev *pdev)
{
struct intel_th *th = pci_get_drvdata(pdev);
intel_th_free(th);
}
static const struct intel_th_drvdata intel_th_2x = {
.tscu_enable = 1,
};
static const struct pci_device_id intel_th_pci_id_table[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
.driver_data = (kernel_ulong_t)0,
},
{
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
.driver_data = (kernel_ulong_t)0,
},
{
/* Apollo Lake */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
.driver_data = (kernel_ulong_t)0,
},
{
/* Broxton */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
.driver_data = (kernel_ulong_t)0,
},
{
/* Broxton B-step */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
.driver_data = (kernel_ulong_t)0,
},
{
/* Kaby Lake PCH-H */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
.driver_data = (kernel_ulong_t)0,
},
{
/* Denverton */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
.driver_data = (kernel_ulong_t)0,
},
{
/* Lewisburg PCH */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa1a6),
.driver_data = (kernel_ulong_t)0,
},
{
/* Gemini Lake */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{
/* Cannon Lake H */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{
/* Cannon Lake LP */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{
/* Cedar Fork PCH */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{ 0 },
};
MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
static struct pci_driver intel_th_pci_driver = {
.name = DRIVER_NAME,
.id_table = intel_th_pci_id_table,
.probe = intel_th_pci_probe,
.remove = intel_th_pci_remove,
};
module_pci_driver(intel_th_pci_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
|
