1#ifndef LINUX_PCI_ATS_H
2#define LINUX_PCI_ATS_H
3
4#include <linux/pci.h>
5
6/* Address Translation Service */
7struct pci_ats {
8	int pos;        /* capability position */
9	int stu;        /* Smallest Translation Unit */
10	int qdep;       /* Invalidate Queue Depth */
11	int ref_cnt;    /* Physical Function reference count */
12	unsigned int is_enabled:1;      /* Enable bit is set */
13};
14
15#ifdef CONFIG_PCI_ATS
16
17int pci_enable_ats(struct pci_dev *dev, int ps);
18void pci_disable_ats(struct pci_dev *dev);
19int pci_ats_queue_depth(struct pci_dev *dev);
20
21/**
22 * pci_ats_enabled - query the ATS status
23 * @dev: the PCI device
24 *
25 * Returns 1 if ATS capability is enabled, or 0 if not.
26 */
27static inline int pci_ats_enabled(struct pci_dev *dev)
28{
29	return dev->ats && dev->ats->is_enabled;
30}
31
32#else /* CONFIG_PCI_ATS */
33
34static inline int pci_enable_ats(struct pci_dev *dev, int ps)
35{
36	return -ENODEV;
37}
38
39static inline void pci_disable_ats(struct pci_dev *dev)
40{
41}
42
43static inline int pci_ats_queue_depth(struct pci_dev *dev)
44{
45	return -ENODEV;
46}
47
48static inline int pci_ats_enabled(struct pci_dev *dev)
49{
50	return 0;
51}
52
53#endif /* CONFIG_PCI_ATS */
54
55#ifdef CONFIG_PCI_PRI
56
57int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
58void pci_disable_pri(struct pci_dev *pdev);
59int pci_reset_pri(struct pci_dev *pdev);
60
61#else /* CONFIG_PCI_PRI */
62
63static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
64{
65	return -ENODEV;
66}
67
68static inline void pci_disable_pri(struct pci_dev *pdev)
69{
70}
71
72static inline int pci_reset_pri(struct pci_dev *pdev)
73{
74	return -ENODEV;
75}
76
77#endif /* CONFIG_PCI_PRI */
78
79#ifdef CONFIG_PCI_PASID
80
81int pci_enable_pasid(struct pci_dev *pdev, int features);
82void pci_disable_pasid(struct pci_dev *pdev);
83int pci_pasid_features(struct pci_dev *pdev);
84int pci_max_pasids(struct pci_dev *pdev);
85
86#else  /* CONFIG_PCI_PASID */
87
88static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
89{
90	return -EINVAL;
91}
92
93static inline void pci_disable_pasid(struct pci_dev *pdev)
94{
95}
96
97static inline int pci_pasid_features(struct pci_dev *pdev)
98{
99	return -EINVAL;
100}
101
102static inline int pci_max_pasids(struct pci_dev *pdev)
103{
104	return -EINVAL;
105}
106
107#endif /* CONFIG_PCI_PASID */
108
109
110#endif /* LINUX_PCI_ATS_H*/
111