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SubjectRe: - sata_mv (7042) hang with large file operations
Morrison, Tom wrote:
> The plot thickens - it looks like it might be some type
> of problem interacting with the setup of my 4Gig DDR memory
> and how I setup some translation windows in my MPC8548E
> I realized this morning that I have an inbound/ output PEX window
> Translation Setup for mapping all from/to PEX bus to outside
> the physical 4GIG memory space (i.e.: up at 0xC_xxxx_xxxx). Thus,
> all output operations that translation from 0xC_xxxx_xxxx to
> the pci 32 bit address of xxxx_xxxx) - and vice versa for for
> the inbound. Note: we also have a straight 1:1 translation mapping
> as well for the lower 4Gig - so that's why this worked without
> the below mentioned change...
> So, I changed the Request & Response Hi Addresses (which were
> Being shifted by 32 bits down anyways) and 'OR' that with my
> 0xC (so the effective 64bit DMA address is 0xC_xxxx_xxxx (where
> Xxxx_xxxx is the effective address). This was what we did to
> solve the problem with the Marvel Linux driver that we got from
> the Marvel site....
> This all works just fine with ONLY 2 gig of memory in the system
> (and still have these inbound/output pex translation windows),
> but fails when I put back the 4 Gig (and the 8Gig) DDR memory.
> Unfortunately, this still hasn't solved the problem though -
> so there is something else which I am not seeing?

I don't know much about how 32-bit PPC deals with memory addresses
that are more than 32-bits..

But does this patch have any effect:

--- old/drivers/ata/sata_mv.c 2007-10-12 12:43:44.000000000 -0400
+++ linux/drivers/ata/sata_mv.c 2007-11-15 17:12:24.000000000 -0500
@@ -685,7 +685,7 @@
int rc;

- if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
+ if (0 && !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
if (rc) {
rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
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