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https://github.com/edk2-porting/linux-next.git
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ccb86a6907
This adds a generic uio driver that can bind to any PCI device. First user will be virtualization where a qemu userspace process needs to give guest OS access to the device. Interrupts are handled using the Interrupt Disable bit in the PCI command register and Interrupt Status bit in the PCI status register. All devices compliant to PCI 2.3 (circa 2002) and all compliant PCI Express devices should support these bits. Driver detects this support, and won't bind to devices which do not support the Interrupt Disable Bit in the command register. It's expected that more features of interest to virtualization will be added to this driver in the future. Possibilities are: mmap for device resources, MSI/MSI-X, eventfd (to interface with kvm), iommu. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Chris Wright <chrisw@redhat.com> Signed-off-by: Hans J. Koch <hjk@linutronix.de> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
98 lines
3.2 KiB
Plaintext
98 lines
3.2 KiB
Plaintext
menuconfig UIO
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tristate "Userspace I/O drivers"
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depends on !S390
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help
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Enable this to allow the userspace driver core code to be
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built. This code allows userspace programs easy access to
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kernel interrupts and memory locations, allowing some drivers
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to be written in userspace. Note that a small kernel driver
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is also required for interrupt handling to work properly.
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If you don't know what to do here, say N.
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if UIO
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config UIO_CIF
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tristate "generic Hilscher CIF Card driver"
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depends on PCI
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help
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Driver for Hilscher CIF DeviceNet and Profibus cards. This
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driver requires a userspace component that handles all of the
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heavy lifting and can be found at:
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http://www.osadl.org/projects/downloads/UIO/user/cif-*
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To compile this driver as a module, choose M here: the module
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will be called uio_cif.
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config UIO_PDRV
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tristate "Userspace I/O platform driver"
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help
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Generic platform driver for Userspace I/O devices.
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If you don't know what to do here, say N.
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config UIO_PDRV_GENIRQ
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tristate "Userspace I/O platform driver with generic IRQ handling"
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help
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Platform driver for Userspace I/O devices, including generic
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interrupt handling code. Shared interrupts are not supported.
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This kernel driver requires that the matching userspace driver
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handles interrupts in a special way. Userspace is responsible
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for acknowledging the hardware device if needed, and re-enabling
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interrupts in the interrupt controller using the write() syscall.
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If you don't know what to do here, say N.
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config UIO_SMX
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tristate "SMX cryptengine UIO interface"
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help
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Userspace IO interface to the Cryptography engine found on the
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Nias Digital SMX boards. These will be available from Q4 2008
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from http://www.niasdigital.com. The userspace part of this
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driver will be released under the GPL at the same time as the
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hardware and will be able to be downloaded from the same site.
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If you compile this as a module, it will be called uio_smx.
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config UIO_AEC
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tristate "AEC video timestamp device"
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depends on PCI
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help
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UIO driver for the Adrienne Electronics Corporation PCI time
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code device.
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This device differs from other UIO devices since it uses I/O
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ports instead of memory mapped I/O. In order to make it
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possible for UIO to work with this device a utility, uioport,
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can be used to read and write the ports:
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git clone git://ifup.org/philips/uioport.git
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If you compile this as a module, it will be called uio_aec.
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config UIO_SERCOS3
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tristate "Automata Sercos III PCI card driver"
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help
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Userspace I/O interface for the Sercos III PCI card from
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Automata GmbH. The userspace part of this driver will be
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available for download from the Automata GmbH web site.
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Automata GmbH: http://www.automataweb.com
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Sercos III interface: http://www.sercos.com
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If you compile this as a module, it will be called uio_sercos3.
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config UIO_PCI_GENERIC
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tristate "Generic driver for PCI 2.3 and PCI Express cards"
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depends on PCI
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default n
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help
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Generic driver that you can bind, dynamically, to any
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PCI 2.3 compliant and PCI Express card. It is useful,
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primarily, for virtualization scenarios.
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If you compile this as a module, it will be called uio_pci_generic.
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endif
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