Filip Navara wrote:
- At first, the UseMapRegisters variable you added to
MAP_REGISTER_ENTRY structure isn't needed. IoFlushAdapterBuffers can determine the information itself and the case was clearly marked as UNIMPLEMENTED and FIXME.
This case isn't marked as UNIMPLEMENTED and FIXME. The using of hardware scatter/gather is marked as UNIMPLEMENTED and FIXME. I've modified the cache manager a little bit. The cache segments for the floppy driver allocated from below the 16MB limit. I get no data from a floppy.
- The byte offset is added for a reason. I know the stuff that it is
supposed to solve is broken atm, but the rationale is that there can be more IoMapTransfer calls and together with MAP_REGISTER_ENTRY->Counter you can setup more transfers... It's explained in http://download.microsoft.com/download/e/b/a/eba1050f-a31d-436b-9281-92cdfea...
It makes no sense to call IoMapTransfer more than ones without a call to IoFlushAdapterBuffers for the pc dma controllers. For the pc dma controllers, a transfer has to be finished, before the next can be started. It is always possible to call IoFlushAdapterBuffers after each transfer and before the next is started. The reference doesn't explain something about to setup more transfers.
- Hartmut