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The .INF file is typically required since only it contains device identification data such as PCI vendor and device IDs or PCMCIA identifier strings. The .INF file may be optionally omitted however, in which case the ndiscvt utility will only perform the conversion of the .SYS file. This is useful for debugging purposes only.
|Open and parse the specified .INF file when performing conversion. The ndiscvt utility will parse this file and emit a device identification structure and registry key configuration structures which will be used by the ndis(4) driver and ndisapi(9) kernel subsystem. If this is omitted, ndiscvt will emit a dummy configuration structure only.|
|Open and parse the specified .SYS file. This file must contain a Windows[rg] driver image. The ndiscvt utility will perform some manipulation of the sections within the executable file to make runtime linking within the kernel a little easier and then convert the image into a data array.|
|Specify an alternate name for the network device/interface which will be created when the driver is instantiated. If you need to load more than one NDIS driver into your system (i.e., if you have two different network cards in your system which require NDIS driver support), each module you create must have a unique name. Device can not be larger than IFNAMSIZ. If no name is specified, the driver will use the default a default name ("ndis").|
|Specify the output file in which to place the resulting data. This can be any file pathname. If outfile is a single dash ('-'), the data will be written to the standard output. The if_ndis.c module expects to find the driver data in a file called ndis_driver_data.h, so it is recommended that this name be used.|
|Generate both an ndis_driver_data.h file and an ndis_driver.data.o file. The latter file will contain a copy of the Windows[rg] .SYS driver image encoded as a FreeBSD ELF object file (created with objcopy(1)). Turning the Windows[rg] driver image directly into an object code file saves disk space and compilation time.|
A few NDIS drivers come with additional files that the core
driver module will load during initialization time.
these files contain firmware which the driver will transfer to
the device in order to make it fully operational.
these files are usually just copied into one of the system
directories along with the driver itself.
In FreeBSD there are two mechanism for loading these files. If the driver is built as a loadable kernel module which is loaded after the kernel has finished booting (and after the root file system has been mounted), the extra files can simply be copied to the /compat/ndis directory, and they will be loaded into the kernel on demand when the driver needs them.
If however the driver is required to bootstrap the system (i.e., if the NDIS-based network interface is to be used for diskless/PXE booting), the files need to be pre-loaded by the bootstrap loader in order to be accessible, since the driver will need them before the root file system has been mounted. However, the bootstrap loader is only able to load files that are shared FreeBSD binary objects.
When an NDIS driver tries to open an external file, the ndisapi(9) code will first search for a loaded kernel module that matches the name specified in the open request, and if that fails, it will then try to open the file from the /compat/ndis directory as well. Note that during kernel bootstrap, the ability to open files from /compat/ndis is disabled: only the module search will be performed.
When using the
|NDISCVT (8)||December 10, 2003|
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|“||If you have an emergency I'm great at running around and flailing my arms||”|
|— Artur Bagyants|