include/linux/pci-ats.h


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

#ifndef LINUX_PCI_ATS_H
#define LINUX_PCI_ATS_H

#include <linux/pci.h>

/* Address Translation Service */
struct pci_ats {
	int pos;        /* capability position */
	int stu;        /* Smallest Translation Unit */
	int qdep;       /* Invalidate Queue Depth */
	int ref_cnt;    /* Physical Function reference count */
	unsigned int is_enabled:1;      /* Enable bit is set */
};

#ifdef CONFIG_PCI_ATS

int pci_enable_ats(struct pci_dev *dev, int ps);
void pci_disable_ats(struct pci_dev *dev);
int pci_ats_queue_depth(struct pci_dev *dev);

/**
 * pci_ats_enabled - query the ATS status
 * @dev: the PCI device
 *
 * Returns 1 if ATS capability is enabled, or 0 if not.
 */
static inline int pci_ats_enabled(struct pci_dev *dev)
{
	return dev->ats && dev->ats->is_enabled;
}

#else /* CONFIG_PCI_ATS */

static inline int pci_enable_ats(struct pci_dev *dev, int ps)
{
	return -ENODEV;
}

static inline void pci_disable_ats(struct pci_dev *dev)
{
}

static inline int pci_ats_queue_depth(struct pci_dev *dev)
{
	return -ENODEV;
}

static inline int pci_ats_enabled(struct pci_dev *dev)
{
	return 0;
}

#endif /* CONFIG_PCI_ATS */

#ifdef CONFIG_PCI_PRI

int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
void pci_disable_pri(struct pci_dev *pdev);
int pci_reset_pri(struct pci_dev *pdev);

#else /* CONFIG_PCI_PRI */

static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
{
	return -ENODEV;
}

static inline void pci_disable_pri(struct pci_dev *pdev)
{
}

static inline int pci_reset_pri(struct pci_dev *pdev)
{
	return -ENODEV;
}

#endif /* CONFIG_PCI_PRI */

#ifdef CONFIG_PCI_PASID

int pci_enable_pasid(struct pci_dev *pdev, int features);
void pci_disable_pasid(struct pci_dev *pdev);
int pci_pasid_features(struct pci_dev *pdev);
int pci_max_pasids(struct pci_dev *pdev);

#else  /* CONFIG_PCI_PASID */

static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
{
	return -EINVAL;
}

static inline void pci_disable_pasid(struct pci_dev *pdev)
{
}

static inline int pci_pasid_features(struct pci_dev *pdev)
{
	return -EINVAL;
}

static inline int pci_max_pasids(struct pci_dev *pdev)
{
	return -EINVAL;
}

#endif /* CONFIG_PCI_PASID */


#endif /* LINUX_PCI_ATS_H*/