include/linux/pci-ats.h

   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  */
  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 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
  66 static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
  67 {
  68         return -ENODEV;
  69 }
  70
  71 static inline void pci_disable_pri(struct pci_dev *pdev)
  72 {
  73 }
  74
  75 static inline bool pci_pri_enabled(struct pci_dev *pdev)
  76 {
  77         return false;
  78 }
  79
  80 static inline int pci_reset_pri(struct pci_dev *pdev)
  81 {
  82         return -ENODEV;
  83 }
  84
  85 static inline bool pci_pri_stopped(struct pci_dev *pdev)
  86 {
  87         return true;
  88 }
  89
  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
 105 static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
 106 {
 107         return -EINVAL;
 108 }
 109
 110 static inline void pci_disable_pasid(struct pci_dev *pdev)
 111 {
 112 }
 113
 114 static inline int pci_pasid_features(struct pci_dev *pdev)
 115 {
 116         return -EINVAL;
 117 }
 118
 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*/