diff options
| author | Ingo Molnar <mingo@elte.hu> | 2011-05-10 22:15:57 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-05-10 22:15:57 +0200 |
| commit | 2c14ddc135d93cb4b33ee4bd4a2b05e21a4a762c (patch) | |
| tree | 47cc9da388b0bae4bbb2255e1fbe9eef724d088c /include/linux | |
| parent | 54b333529df25b21da462c7dcc16c7dc779d9f26 (diff) | |
| parent | 72fe00f01f9a3240a1073be27aeaf4fc476cc662 (diff) | |
Merge branch 'iommu/2.6.40' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into core/iommu
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pci-ats.h | 52 |
1 files changed, 52 insertions, 0 deletions
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*/ |