Re: Opterons and setting the pci bus master bit

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Fri, 2005-09-30 at 13:32 -0400, linux-os (Dick Johnson) wrote:
>     pci_set_dma_mask(dev, 0xffffffffULL);    // 32 bit DMA only
>     pci_set_drvdata(dev, NULL);              // Harmless if unused
>     pci_set_power_state(dev, 0);             // Turn it ON
>     pci_set_master(dev);                     // Make bus-master
>     pci_set_mwi(dev);   // Check return, different code
>     pci_write_config_dword(dev, PCI_COMMAND, PCI_CONFIG_YOU_DEFINE);
> 
>    Typical bus-master PCI_CONFIG_YOU_DEFINE is:
>      (PCI_COMMAND_MEMORY|PCI_COMMAND_MASTER|PCI_COMMAND_SERR)

Actually the last one is slightly bogus for things like
memory/master/etc... you shouldn't bother about these if you do things
correctly and call ... pci_enable_device() which you forgot :)

Ben.


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