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The bulk of the driver code now lives in the 'dde_linux' repository, which is available on all platforms, from where it can be referenced by other repositories. The 'wifi_drv' binary was delegated to a generic harness that includes all configuration and management functionality shared by all wireless device driver components, e.g., the wpa_supplicant. The code of the device driver emulation environment is located in 'src/lib/wifi'. It is referenced by the platform-specific driver library that resides in the corresponding platform repository. The runtime configuration needs to point the driver to proper driver library. The platform-specific library is in charge of orchestrating the contrib source utilized by the driver as well as providing the 'source.list' and 'dep.list' files. It must include the generic library snippet 'repos/dde_linux/lib/wifi.inc' that deals with managing the emulation environment code. The 'repos/dde_linux/src/drivers/wifi/README' file contains more detailed information on how to deploy the driver. Issue #4861.
73 lines
2.5 KiB
Plaintext
73 lines
2.5 KiB
Plaintext
Device drivers ported from the Linux kernel
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USB
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###
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Host controller
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~~~~~~~~~~~~~~~
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The driver will start all USB controller types a platform offers.
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Please consult repos/dde_linux/drivers/usb_host/README for a description.
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HID
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~~~
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Please consult repos/dde_linux/drivers/usb_hid/README for a description.
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Storage
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~~~~~~~
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Please consult repos/os/src/drivers/usb_block/README for a description.
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Network (Nic)
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~~~~~~~~~~~~~
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Please consolut repos/dde_linux/src/drivers/usb_net/README for a description.
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LXIP
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####
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LXIP is a port of the Linux TCP/IP stack to Genode. It is build as a shared
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library named 'lxip.lib.so'. The IP stack can be interfaced using Genode's
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version of 'libc' by linking your application to 'lxip_libc' plugin in your
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'target.mk' file.
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Wifi
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####
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The 'wifi_drv' consists of a port of the mac802.11 stack, platform-specific
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drivers and the 'wpa_supplicant' to Genode.
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lx_kit
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######
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The modular lx_kit seperates the required back end functionality of the Linux
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emulation environment from the front end. Thereby each driver can reuse
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specific parts or supply more suitable implementations by itself. It is used to
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reduce the amount of redundant code in each driver.
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The lx_kit is split into several layers whose structure is as follows:
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The first layer in _repos/dde_linux/src/include/lx_emul_ contains those header
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files that provide the structural definitions and function declarations of the
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Linux API, e.g. _errno.h_ provides all error code values. The second layer in
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_repos/dde_linux/src/include/lx_emul/impl_ contains the implementation of
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selected functions, e.g. _slab.h_ provides the implementation of 'kmalloc()'.
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The lx_kit back end API is the third layer and provides the _Lx::Malloc_
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interface (_repos/dde_linux/src/include/lx_kit/malloc.h_) which is used to
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implement 'kmalloc()'. There are several generic implementations of the lx_kit
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interfaces that can be used by a driver.
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A driver typically includes a 'lx_emul/impl/xyz.h' header once directly in its
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lx_emul compilation unit. The lx_kit interface files are only included in those
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compilation units that use or implement the interface. If a driver wants to use
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a generic implementation it must add the source file to its source file list.
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The generic implementations are located in _repos/dde_linux/src/lx_kit/_.
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The modular lx_kit still depends on the private _lx_emul.h_ header file that is
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tailored to each driver. Since the lx_kit already contains much of the
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declarations and definitions that were originally placed in these private
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header files, those files can now ommit a large amount of code.
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