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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-19 17:28:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-19 17:28:58 -0700
commitcbdad8dc18b8ddd6c8b48c4ef26d46f00b5af923 (patch)
tree6354f5685db502e748b801873ed07ba1a7fa1f09 /include
parent51509a283a908d73b20371addc67ee3ae7189934 (diff)
parent86b9523ab1517f6edeb87295329c901930d3732d (diff)
Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, gart: Rename pci-gart_64.c to amd_gart_64.c x86/amd-iommu: Use threaded interupt handler arch/x86/kernel/pci-iommu_table.c: Convert sprintf_symbol to %pS x86/amd-iommu: Add support for invalidate_all command x86/amd-iommu: Add extended feature detection x86/amd-iommu: Add ATS enable/disable code x86/amd-iommu: Add flag to indicate IOTLB support x86/amd-iommu: Flush device IOTLB if ATS is enabled x86/amd-iommu: Select PCI_IOV with AMD IOMMU driver PCI: Move ATS declarations in seperate header file dma-debug: print information about leaked entry x86/amd-iommu: Flush all internal TLBs when IOMMUs are enabled x86/amd-iommu: Rename iommu_flush_device x86/amd-iommu: Improve handling of full command buffer x86/amd-iommu: Rename iommu_flush* to domain_flush* x86/amd-iommu: Remove command buffer resetting logic x86/amd-iommu: Cleanup completion-wait handling x86/amd-iommu: Cleanup inv_pages command handling x86/amd-iommu: Move inv-dte command building to own function x86/amd-iommu: Move compl-wait command building to own function
Diffstat (limited to 'include')
-rw-r--r--include/linux/pci-ats.h52
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*/