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include/linux/pci-ats.h 2.59 KB
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  #ifndef LINUX_PCI_ATS_H
  #define LINUX_PCI_ATS_H
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  #include <linux/pci.h>
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  /* Address Translation Service */
  struct pci_ats {
  	int pos;        /* capability position */
  	int stu;        /* Smallest Translation Unit */
  	int qdep;       /* Invalidate Queue Depth */
  	int ref_cnt;    /* Physical Function reference count */
  	unsigned int is_enabled:1;      /* Enable bit is set */
  };
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  #ifdef CONFIG_PCI_ATS
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  extern int pci_enable_ats(struct pci_dev *dev, int ps);
  extern void pci_disable_ats(struct pci_dev *dev);
  extern int pci_ats_queue_depth(struct pci_dev *dev);
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  /**
   * pci_ats_enabled - query the ATS status
   * @dev: the PCI device
   *
   * Returns 1 if ATS capability is enabled, or 0 if not.
   */
  static inline int pci_ats_enabled(struct pci_dev *dev)
  {
  	return dev->ats && dev->ats->is_enabled;
  }









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  #else /* CONFIG_PCI_ATS */









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  static inline int pci_enable_ats(struct pci_dev *dev, int ps)
  {
  	return -ENODEV;
  }
  
  static inline void pci_disable_ats(struct pci_dev *dev)
  {
  }
  
  static inline int pci_ats_queue_depth(struct pci_dev *dev)
  {
  	return -ENODEV;
  }
  
  static inline int pci_ats_enabled(struct pci_dev *dev)
  {
  	return 0;
  }









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  #endif /* CONFIG_PCI_ATS */









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  #ifdef CONFIG_PCI_PRI
  
  extern int  pci_enable_pri(struct pci_dev *pdev, u32 reqs);
  extern void pci_disable_pri(struct pci_dev *pdev);
  extern bool pci_pri_enabled(struct pci_dev *pdev);
  extern int  pci_reset_pri(struct pci_dev *pdev);
  extern bool pci_pri_stopped(struct pci_dev *pdev);
  extern int  pci_pri_status(struct pci_dev *pdev);
  
  #else /* CONFIG_PCI_PRI */
  
  static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs)
  {
  	return -ENODEV;
  }
  
  static inline void pci_disable_pri(struct pci_dev *pdev)
  {
  }
  
  static inline bool pci_pri_enabled(struct pci_dev *pdev)
  {
  	return false;
  }
  
  static inline int pci_reset_pri(struct pci_dev *pdev)
  {
  	return -ENODEV;
  }
  
  static inline bool pci_pri_stopped(struct pci_dev *pdev)
  {
  	return true;
  }
  
  static inline int pci_pri_status(struct pci_dev *pdev)
  {
  	return -ENODEV;
  }
  #endif /* CONFIG_PCI_PRI */









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  #ifdef CONFIG_PCI_PASID
  
  extern int pci_enable_pasid(struct pci_dev *pdev, int features);
  extern void pci_disable_pasid(struct pci_dev *pdev);
  extern int pci_pasid_features(struct pci_dev *pdev);
  extern int pci_max_pasids(struct pci_dev *pdev);
  
  #else  /* CONFIG_PCI_PASID */
  
  static inline int pci_enable_pasid(struct pci_dev *pdev, int features)
  {
  	return -EINVAL;
  }
  
  static inline void pci_disable_pasid(struct pci_dev *pdev)
  {
  }
  
  static inline int pci_pasid_features(struct pci_dev *pdev)
  {
  	return -EINVAL;
  }
  
  static inline int pci_max_pasids(struct pci_dev *pdev)
  {
  	return -EINVAL;
  }
  
  #endif /* CONFIG_PCI_PASID */









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  #endif /* LINUX_PCI_ATS_H*/