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authorAlex Williamson <alex.williamson@redhat.com>2012-07-31 08:16:24 -0600
committerAlex Williamson <alex.williamson@redhat.com>2012-07-31 08:16:24 -0600
commit89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 (patch)
tree6bea54ae5eaea48c17d309855d36d801259b64d1 /include/linux/vfio.h
parent73fa0d10d077d9521ee2dace2307ae2c9a965336 (diff)
downloadop-kernel-dev-89e1f7d4c66d85f42c3d52ea3866eb10cadf6153.zip
op-kernel-dev-89e1f7d4c66d85f42c3d52ea3866eb10cadf6153.tar.gz
vfio: Add PCI device driver
Add PCI device support for VFIO. PCI devices expose regions for accessing config space, I/O port space, and MMIO areas of the device. PCI config access is virtualized in the kernel, allowing us to ensure the integrity of the system, by preventing various accesses while reducing duplicate support across various userspace drivers. I/O port supports read/write access while MMIO also supports mmap of sufficiently sized regions. Support for INTx, MSI, and MSI-X interrupts are provided using eventfds to userspace. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include/linux/vfio.h')
-rw-r--r--include/linux/vfio.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index acb046f..0a4f180 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -223,6 +223,7 @@ struct vfio_device_info {
__u32 argsz;
__u32 flags;
#define VFIO_DEVICE_FLAGS_RESET (1 << 0) /* Device supports reset */
+#define VFIO_DEVICE_FLAGS_PCI (1 << 1) /* vfio-pci device */
__u32 num_regions; /* Max region index + 1 */
__u32 num_irqs; /* Max IRQ index + 1 */
};
@@ -364,6 +365,31 @@ struct vfio_irq_set {
*/
#define VFIO_DEVICE_RESET _IO(VFIO_TYPE, VFIO_BASE + 11)
+/*
+ * The VFIO-PCI bus driver makes use of the following fixed region and
+ * IRQ index mapping. Unimplemented regions return a size of zero.
+ * Unimplemented IRQ types return a count of zero.
+ */
+
+enum {
+ VFIO_PCI_BAR0_REGION_INDEX,
+ VFIO_PCI_BAR1_REGION_INDEX,
+ VFIO_PCI_BAR2_REGION_INDEX,
+ VFIO_PCI_BAR3_REGION_INDEX,
+ VFIO_PCI_BAR4_REGION_INDEX,
+ VFIO_PCI_BAR5_REGION_INDEX,
+ VFIO_PCI_ROM_REGION_INDEX,
+ VFIO_PCI_CONFIG_REGION_INDEX,
+ VFIO_PCI_NUM_REGIONS
+};
+
+enum {
+ VFIO_PCI_INTX_IRQ_INDEX,
+ VFIO_PCI_MSI_IRQ_INDEX,
+ VFIO_PCI_MSIX_IRQ_INDEX,
+ VFIO_PCI_NUM_IRQS
+};
+
/* -------- API for Type1 VFIO IOMMU -------- */
/**
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