On 07/20/2011 01:16 AM, Rafał Miłecki wrote:
W dniu 20 lipca 2011 01:15 użytkownik Michael Büsch<m@xxxxxxx> napisał:
On Wed, 20 Jul 2011 00:12:20 +0200
Rafał Miłecki<zajec5@xxxxxxxxx> wrote:
+ * be fixed on ssb side, but requires testing with b43,
+ * b43legacy and b44. */
No it doesn't. b44 and b43legacy don't use 64bit DMA.
Just fix it in ssb, please.
They (drivers) don't, but what if we start giving them routing for
64-bit DMA? AFAIU they treat 64-bit DMA as 32-bit one (according to
specs: "If 64 Bit isn't an option, Silicon Backplane and PCI-E buses
can use 32 bit DMA.").
Won't they start using 64-bit DMA in the 32-bit way but with 64-bit
routing bits?
The BCM4311 was the first device that supported 64-bit DMA. I had the first of
those, and I got to debug the 64-bit stuff that had been written by Michael, but
there had been no hardware for testing. All earlier devices were restricted to
32-bit paths.
Larry
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