Re: CONFIG_BLK_DEV_IDEDMA_PCI

On   5 Jun, this message from Geert Uytterhoeven echoed through cyberspace:

When trying to compile the sl82c105 IDE driver for my LongTrail, I stumbled
across the following problem:

This driver needs CONFIG_BLK_DEV_IDEDMA=y, so its config line in
drivers/ide/Config.in should look like:

    dep_mbool '    Winbond SL82c105 support' CONFIG_BLK_DEV_SL82C105 $CONFIG_BLK_DEV_IDEDMA_PCI

Unfortunately I cannot turn CONFIG_BLK_DEV_IDEDMA on because it is
automatically turned off again by the following construct in
drivers/ide/Config.in:

  if [ "$CONFIG_PMAC" = "y" -o "$CONFIG_ALL_PPC" = "y" ]; then
     bool '    Builtin PowerMac IDE support' CONFIG_BLK_DEV_IDE_PMAC
     dep_bool '      PowerMac IDE DMA support' CONFIG_BLK_DEV_IDEDMA_PMAC $CONFIG_BLK_DEV_IDE_PMAC
     dep_bool '        Use DMA by default' CONFIG_IDEDMA_PMAC_AUTO $CONFIG_BLK_DEV_IDEDMA_PMAC
     define_bool CONFIG_BLK_DEV_IDEDMA $CONFIG_BLK_DEV_IDEDMA_PMAC
     define_bool CONFIG_BLK_DEV_IDEDMA_PCI $CONFIG_BLK_DEV_IDEDMA_PMAC
  fi

Aha, that might be one of the reasons why I need to enable PowerMac
built-in IDE, although I don't have such a beast, in order to get my
Promise going...

I think this part needs to be under the test for CONFIG_PCI, just like the
other PCI IDE (DMA) drivers.

There is quite some mixup on PPC between standard (PC, that is :-( ) IDE
and PowerMac IDE. Paul Mackerras might help out on that part...

Michel

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