Linux kernel mirror (for testing)
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linux
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
17extern int pci_enable_ats(struct pci_dev *dev, int ps);
18extern void pci_disable_ats(struct pci_dev *dev);
19extern int 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
57extern int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
58extern void pci_disable_pri(struct pci_dev *pdev);
59extern bool pci_pri_enabled(struct pci_dev *pdev);
60extern int pci_reset_pri(struct pci_dev *pdev);
61extern bool pci_pri_stopped(struct pci_dev *pdev);
62extern int pci_pri_status(struct pci_dev *pdev);
63
64#else /* CONFIG_PCI_PRI */
65
66static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
67{
68 return -ENODEV;
69}
70
71static inline void pci_disable_pri(struct pci_dev *pdev)
72{
73}
74
75static inline bool pci_pri_enabled(struct pci_dev *pdev)
76{
77 return false;
78}
79
80static inline int pci_reset_pri(struct pci_dev *pdev)
81{
82 return -ENODEV;
83}
84
85static inline bool pci_pri_stopped(struct pci_dev *pdev)
86{
87 return true;
88}
89
90static inline int pci_pri_status(struct pci_dev *pdev)
91{
92 return -ENODEV;
93}
94#endif /* CONFIG_PCI_PRI */
95
96#ifdef CONFIG_PCI_PASID
97
98extern int pci_enable_pasid(struct pci_dev *pdev, int features);
99extern void pci_disable_pasid(struct pci_dev *pdev);
100extern int pci_pasid_features(struct pci_dev *pdev);
101extern int pci_max_pasids(struct pci_dev *pdev);
102
103#else /* CONFIG_PCI_PASID */
104
105static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
106{
107 return -EINVAL;
108}
109
110static inline void pci_disable_pasid(struct pci_dev *pdev)
111{
112}
113
114static inline int pci_pasid_features(struct pci_dev *pdev)
115{
116 return -EINVAL;
117}
118
119static inline int pci_max_pasids(struct pci_dev *pdev)
120{
121 return -EINVAL;
122}
123
124#endif /* CONFIG_PCI_PASID */
125
126
127#endif /* LINUX_PCI_ATS_H*/