db3c33c6d3
ATS does not depend on IOV support, so move the code into its own file. This file will also include support for the PRI and PASID capabilities later. Also give ATS its own Kconfig variable to allow selecting it without IOV support. Reviewed-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#ifndef LINUX_PCI_ATS_H
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#define LINUX_PCI_ATS_H
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#include <linux/pci.h>
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/* Address Translation Service */
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struct pci_ats {
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int pos; /* capability position */
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int stu; /* Smallest Translation Unit */
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int qdep; /* Invalidate Queue Depth */
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int ref_cnt; /* Physical Function reference count */
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unsigned int is_enabled:1; /* Enable bit is set */
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};
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#ifdef CONFIG_PCI_IOV
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extern int pci_enable_ats(struct pci_dev *dev, int ps);
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extern void pci_disable_ats(struct pci_dev *dev);
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extern int pci_ats_queue_depth(struct pci_dev *dev);
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/**
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* pci_ats_enabled - query the ATS status
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* @dev: the PCI device
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*
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* Returns 1 if ATS capability is enabled, or 0 if not.
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*/
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static inline int pci_ats_enabled(struct pci_dev *dev)
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{
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return dev->ats && dev->ats->is_enabled;
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}
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#else /* CONFIG_PCI_IOV */
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static inline int pci_enable_ats(struct pci_dev *dev, int ps)
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{
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return -ENODEV;
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}
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static inline void pci_disable_ats(struct pci_dev *dev)
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{
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}
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static inline int pci_ats_queue_depth(struct pci_dev *dev)
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{
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return -ENODEV;
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}
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static inline int pci_ats_enabled(struct pci_dev *dev)
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{
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return 0;
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}
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#endif /* CONFIG_PCI_IOV */
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#endif /* LINUX_PCI_ATS_H*/
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