Robert Hancock wrote:
>@@ -1153,6 +1164,15 @@
> pp->notifier_clear_block = pp->gen_block +
> NV_ADMA_NOTIFIER_CLEAR + (4 * ap->port_no);
>
>+ /* Now that the legacy PRD and padding buffer are allocated we can
>+ safely raise the DMA mask to allocate the CPB/APRD table.
>+ These are allowed to fail since we store the value that ends up
>+ being used to set as the bounce limit in slave_config later if
>+ needed. */
>+ pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
>+ pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
>+ pp->adma_dma_mask = *dev->dma_mask;
>+
> mem = dmam_alloc_coherent(dev, NV_ADMA_PORT_PRIV_DMA_SZ,
> &mem_dma, GFP_KERNEL);
This causes my DMA memory to always be above 4GB no matter how much I delay the setting of the 64bit DMA mask. I find that if I set the DMA mask as 32bit and not increase it to 64 bit at all then all my I/O to the DVD rom are fine.
Jeff Garzik wrote:
>I would consider setting the consistent DMA mask to 32-bit, and setting
>the overall mask to 64-bit.
>Seems like that would solve the problem?
I agree and I have tested that it is working.
-Shyam Iyer
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