summaryrefslogtreecommitdiff
path: root/drivers/vfio/pci/vfio_pci_private.h
AgeCommit message (Collapse)Author
2014-08-07vfio-pci: Attempt bus/slot reset on releaseAlex Williamson
Each time a device is released, mark whether a local reset was successful or whether a bus/slot reset is needed. If a reset is needed and all of the affected devices are bound to vfio-pci and unused, allow the reset. This is most useful when the userspace driver is killed and releases all the devices in an unclean state, such as when a QEMU VM quits. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2014-08-07vfio-pci: Use mutex around open, release, and removeAlex Williamson
Serializing open/release allows us to fix a refcnt error if we fail to enable the device and lets us prevent devices from being unbound or opened, giving us an opportunity to do bus resets on release. No restriction added to serialize binding devices to vfio-pci while the mutex is held though. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-03-11VFIO-AER: Vfio-pci driver changes for supporting AERVijay Mohan Pandarathil
- New VFIO_SET_IRQ ioctl option to pass the eventfd that is signaled when an error occurs in the vfio_pci_device - Register pci_error_handler for the vfio_pci driver - When the device encounters an error, the error handler registered by the vfio_pci driver gets invoked by the AER infrastructure - In the error handler, signal the eventfd registered for the device. - This results in the qemu eventfd handler getting invoked and appropriate action taken for the guest. Signed-off-by: Vijay Mohan Pandarathil <vijaymohan.pandarathil@hp.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-02-18vfio-pci: Add support for VGA region accessAlex Williamson
PCI defines display class VGA regions at I/O port address 0x3b0, 0x3c0 and MMIO address 0xa0000. As these are non-overlapping, we can ignore the I/O port vs MMIO difference and expose them both in a single region. We make use of the VGA arbiter around each access to configure chipset access as necessary. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2013-02-14vfio-pci: Cleanup BAR accessAlex Williamson
We can actually handle MMIO and I/O port from the same access function since PCI already does abstraction of this. The ROM BAR only requires a minor difference, so it gets included too. vfio_pci_config_readwrite gets renamed for consistency. Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2012-07-31vfio: Add PCI device driverAlex Williamson
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>