forked from Minki/linux
0a0c3b5a24
This device extends the uio_pdrv_genirq driver to provide limited dynamic memory allocation for UIO devices. This allows UIO devices to use CMA and IOMMU allocated memory regions. This driver is based on the uio_pdrv_genirq driver and provides the same generic interrupt handling capabilities. Like uio_prdv_genirq, a fixed number of memory regions, defined in the platform device's .resources field are exported to userpace. This driver adds the ability to export additional regions whose number and size are known at boot time, but whose memory is not allocated until the uio device file is opened for the first time. When the device file is closed, the allocated memory block is freed. Physical (DMA) addresses for the dynamic regions are provided to the userspace via /sys/class/uio/uioX/maps/mapY/addr in the same way as static addresses are when the uio device file is open, when no processes are holding the device file open, the address returned to userspace is DMA_ERROR_CODE. Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp> Signed-off-by: "Hans J. Koch" <hjk@hansjkoch.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
131 lines
4.3 KiB
Plaintext
131 lines
4.3 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 called cif that handles
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all of the heavy lifting and can be found at:
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<http://www.osadl.org/projects/downloads/UIO/user/>
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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_DMEM_GENIRQ
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tristate "Userspace platform driver with generic irq and dynamic memory"
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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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Memory regions can be specified with the same platform device
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resources as the UIO_PDRV drivers, but dynamic regions can also
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be specified.
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The number and size of these regions is static,
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but the memory allocation is not performed until
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the associated device file is opened. The
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memory is freed once the uio device is closed.
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If you don't know what to do here, say N.
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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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depends on PCI
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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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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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config UIO_NETX
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tristate "Hilscher NetX Card driver"
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depends on PCI
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help
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Driver for Hilscher NetX based fieldbus cards (cifX, comX).
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This driver requires a userspace component that comes with the card
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or is available from Hilscher (http://www.hilscher.com).
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To compile this driver as a module, choose M here; the module
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will be called uio_netx.
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config UIO_PRUSS
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tristate "Texas Instruments PRUSS driver"
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depends on ARCH_DAVINCI_DA850
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help
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PRUSS driver for OMAPL138/DA850/AM18XX devices
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PRUSS driver requires user space components, examples and user space
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driver is available from below SVN repo - you may use anonymous login
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https://gforge.ti.com/gf/project/pru_sw/
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More info on API is available at below wiki
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http://processors.wiki.ti.com/index.php/PRU_Linux_Application_Loader
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To compile this driver as a module, choose M here: the module
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will be called uio_pruss.
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endif
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