Arjan van de Ven wrote:
> On Sun, 20 Jul 2008 20:36:23 +0200
> Stefan Richter <[EMAIL PROTECTED]> wrote:
>
>> PS: I don't want to set the DMA mask of this device to
>> DMA_31BIT_MASK because that would be detrimental to other functions
>> of the device. It's a TI TSB43AB22A FireWire controller.
>
> Hi,
>
> just want to mention that you can set the coherent mask separately from
> the generic mask... is that sufficient for your load?
> (you can even set it just for this allocation..)
Hmm. Would that be done this way?
During probe:
if (chip_is_tsb43ab22a) {
if (dma_supported(dev, DMA_31BIT_MASK))
chip->needs_dma_mask_workaround = 1;
else
chip->needs_some_other_workaround = 1;
}
Later on:
if (dev->needs_dma_mask_workaround)
pci_set_consistent_dma_mask(pdev, DMA_31BIT_MASK);
allocate_something_special;
if (dev->needs_dma_mask_workaround)
pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
Or is there a variant of dma_alloc_coherent() which directly accepts a
mask argument?
--
Stefan Richter
-=====-==--- -=== =-=--
http://arcgraph.de/sr/
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