root/include/linux/pci-ats.h

DEFINITIONS

1. pci_ats_enabled
2. pci_enable_ats
3. pci_disable_ats
4. pci_ats_queue_depth
5. pci_ats_enabled
6. pci_enable_pri
7. pci_disable_pri
8. pci_reset_pri
9. pci_enable_pasid
10. pci_disable_pasid
11. pci_pasid_features
12. pci_max_pasids

#ifndef LINUX_PCI_ATS_H
#define LINUX_PCI_ATS_H

#include <linux/pci.h>

/* 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 */
};

#ifdef CONFIG_PCI_ATS

int pci_enable_ats(struct pci_dev *dev, int ps);
void pci_disable_ats(struct pci_dev *dev);
int pci_ats_queue_depth(struct pci_dev *dev);

/**
 * 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;
}

#else /* CONFIG_PCI_ATS */

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;
}

#endif /* CONFIG_PCI_ATS */

#ifdef CONFIG_PCI_PRI

int pci_enable_pri(struct pci_dev *pdev, u32 reqs);
void pci_disable_pri(struct pci_dev *pdev);
int pci_reset_pri(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 int pci_reset_pri(struct pci_dev *pdev)
{
        return -ENODEV;
}

#endif /* CONFIG_PCI_PRI */

#ifdef CONFIG_PCI_PASID

int pci_enable_pasid(struct pci_dev *pdev, int features);
void pci_disable_pasid(struct pci_dev *pdev);
int pci_pasid_features(struct pci_dev *pdev);
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 */


#endif /* LINUX_PCI_ATS_H*/