From 5cdede2408e80f190c5595e592c24e77c1bf44b2 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Mon, 4 Apr 2011 15:55:18 +0200 Subject: PCI: Move ATS declarations in seperate header file This patch moves the relevant declarations from the local header file in drivers/pci to a more accessible locations so that it can be used by the AMD IOMMU driver too. The file is named pci-ats.h because support for the PCI PRI capability will also be added there in a later patch-set. Signed-off-by: Joerg Roedel Acked-by: Jesse Barnes --- include/linux/pci-ats.h | 52 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 include/linux/pci-ats.h (limited to 'include/linux/pci-ats.h') diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h new file mode 100644 index 000000000000..655824fa4c76 --- /dev/null +++ b/include/linux/pci-ats.h @@ -0,0 +1,52 @@ +#ifndef LINUX_PCI_ATS_H +#define LINUX_PCI_ATS_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_IOV + +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); +/** + * 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_IOV */ + +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_IOV */ + +#endif /* LINUX_PCI_ATS_H*/ -- cgit v1.2.3-58-ga151