1 #ifndef LINUX_PCI_ATS_H
2 #define LINUX_PCI_ATS_H
3
4 #include <linux/pci.h>
5
6 /* Address Translation Service */
7 struct 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
17 int pci_enable_ats(struct pci_dev *dev, int ps);
18 void pci_disable_ats(struct pci_dev *dev);
19 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 */
pci_ats_enabled(struct pci_dev * dev)27 static 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
pci_enable_ats(struct pci_dev * dev,int ps)34 static inline int pci_enable_ats(struct pci_dev *dev, int ps)
35 {
36 return -ENODEV;
37 }
38
pci_disable_ats(struct pci_dev * dev)39 static inline void pci_disable_ats(struct pci_dev *dev)
40 {
41 }
42
pci_ats_queue_depth(struct pci_dev * dev)43 static inline int pci_ats_queue_depth(struct pci_dev *dev)
44 {
45 return -ENODEV;
46 }
47
pci_ats_enabled(struct pci_dev * dev)48 static 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
57 int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
58 void pci_disable_pri(struct pci_dev *pdev);
59 int pci_reset_pri(struct pci_dev *pdev);
60
61 #else /* CONFIG_PCI_PRI */
62
pci_enable_pri(struct pci_dev * pdev,u32 reqs)63 static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
64 {
65 return -ENODEV;
66 }
67
pci_disable_pri(struct pci_dev * pdev)68 static inline void pci_disable_pri(struct pci_dev *pdev)
69 {
70 }
71
pci_reset_pri(struct pci_dev * pdev)72 static 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
81 int pci_enable_pasid(struct pci_dev *pdev, int features);
82 void pci_disable_pasid(struct pci_dev *pdev);
83 int pci_pasid_features(struct pci_dev *pdev);
84 int pci_max_pasids(struct pci_dev *pdev);
85
86 #else /* CONFIG_PCI_PASID */
87
pci_enable_pasid(struct pci_dev * pdev,int features)88 static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
89 {
90 return -EINVAL;
91 }
92
pci_disable_pasid(struct pci_dev * pdev)93 static inline void pci_disable_pasid(struct pci_dev *pdev)
94 {
95 }
96
pci_pasid_features(struct pci_dev * pdev)97 static inline int pci_pasid_features(struct pci_dev *pdev)
98 {
99 return -EINVAL;
100 }
101
pci_max_pasids(struct pci_dev * pdev)102 static 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