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 extern int pci_enable_ats(struct pci_dev *dev, int ps);
18 extern void pci_disable_ats(struct pci_dev *dev);
19 extern 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 extern int  pci_enable_pri(struct pci_dev *pdev, u32 reqs);
58 extern void pci_disable_pri(struct pci_dev *pdev);
59 extern bool pci_pri_enabled(struct pci_dev *pdev);
60 extern int  pci_reset_pri(struct pci_dev *pdev);
61 extern bool pci_pri_stopped(struct pci_dev *pdev);
62 extern int  pci_pri_status(struct pci_dev *pdev);
63 
64 #else /* CONFIG_PCI_PRI */
65 
pci_enable_pri(struct pci_dev * pdev,u32 reqs)66 static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
67 {
68 	return -ENODEV;
69 }
70 
pci_disable_pri(struct pci_dev * pdev)71 static inline void pci_disable_pri(struct pci_dev *pdev)
72 {
73 }
74 
pci_pri_enabled(struct pci_dev * pdev)75 static inline bool pci_pri_enabled(struct pci_dev *pdev)
76 {
77 	return false;
78 }
79 
pci_reset_pri(struct pci_dev * pdev)80 static inline int pci_reset_pri(struct pci_dev *pdev)
81 {
82 	return -ENODEV;
83 }
84 
pci_pri_stopped(struct pci_dev * pdev)85 static inline bool pci_pri_stopped(struct pci_dev *pdev)
86 {
87 	return true;
88 }
89 
pci_pri_status(struct pci_dev * pdev)90 static 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 
98 extern int pci_enable_pasid(struct pci_dev *pdev, int features);
99 extern void pci_disable_pasid(struct pci_dev *pdev);
100 extern int pci_pasid_features(struct pci_dev *pdev);
101 extern int pci_max_pasids(struct pci_dev *pdev);
102 
103 #else  /* CONFIG_PCI_PASID */
104 
pci_enable_pasid(struct pci_dev * pdev,int features)105 static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
106 {
107 	return -EINVAL;
108 }
109 
pci_disable_pasid(struct pci_dev * pdev)110 static inline void pci_disable_pasid(struct pci_dev *pdev)
111 {
112 }
113 
pci_pasid_features(struct pci_dev * pdev)114 static inline int pci_pasid_features(struct pci_dev *pdev)
115 {
116 	return -EINVAL;
117 }
118 
pci_max_pasids(struct pci_dev * pdev)119 static 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*/
128