Modifications to DSP files

These notes provide information about modifications to the DSP files that are required for MDI drivers. This information supplements the information in ``DSP issues''. Also see ``DSP (Driver Software Package)''. See the sample source code in the ndsamples package for examples of these files.

• The following definitions are required in the Master(DSP/4dsp) file for MDI drivers that use DDI 7 and MDI 2.

     $version 2
     $entry init intr
     $modtype Network Adapter
     $interface ddi 7     # could also be ddi 7mp, ddi 7.1, ddi 7.1mp
     $interface mdi 2     # could also be mdi 2.1
  

  The following definitions are required for MDI drivers that use DDI 8mp and MDI 2.1:

     $version 2
     $modtype Network Adapter
     $interface ddi 8mp   # could also be ddi 8
     $interface mdi 2.1   # could also be mdi 2
  

  If your driver is multithreaded, be sure to specify ddi 7mp or ddi 8mp.

• For DDI 7 drivers, Specify ``L'', ``S'', and ``c'' to indicate a loadable STREAMS character driver in the ``characteristics'' field. For DDI 8 drivers, only the ``h'' characteristic is necessary for MDI drivers.

• For the System(DSP/4dsp) file, note that the IPL for STREAMS devices is 6 on SVR5 and SCO SVR5 1 and 2 systems whereas it is 5 on SCO OpenServer 5. System files for PCI devices must specify ITYPE=4.

• Create bcfg(DSP/4dsp) file for each bus type the driver supports. This file must list all the DSP and other files that are required to install the driver, definitions of all tunable parameters that users can modify, and other information required to configure the driver. Many of the bcfg parameters can be obtained from the SCO OpenServer 5 MDI AOF file, although the bcfg syntax is different and supports additional parameters.

• The Space.c(DSP/4dsp) file usually contains nothing other than the MODNAME declaration. Most configurable parameters are defined in the bcfg(DSP/4dsp) file rather than Space.c. The only parameters that should be defined in the drivers Space.c file are those that users are not expected to modify.