xref: /linux-6.15/include/linux/pci-ats.h (revision ef264cf0) 
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  */
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 
34 static inline int pci_enable_ats(struct pci_dev *dev, int ps)
35 {
36 	return -ENODEV;
37 }
38 
39 static inline void pci_disable_ats(struct pci_dev *dev)
40 {
41 }
42 
43 static inline int pci_ats_queue_depth(struct pci_dev *dev)
44 {
45 	return -ENODEV;
46 }
47 
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 
63 static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
64 {
65 	return -ENODEV;
66 }
67 
68 static inline void pci_disable_pri(struct pci_dev *pdev)
69 {
70 }
71 
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 
88 static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
89 {
90 	return -EINVAL;
91 }
92 
93 static inline void pci_disable_pasid(struct pci_dev *pdev)
94 {
95 }
96 
97 static inline int pci_pasid_features(struct pci_dev *pdev)
98 {
99 	return -EINVAL;
100 }
101 
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