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 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*/