On 01/09/2013 03:10 PM, Arnd Bergmann wrote: > On Wednesday 09 January 2013, Thierry Reding wrote: >> What happens on Tegra is that we need to map 256 MiB of physical memory >> to access all the PCIe extended configuration space. However, ioremap() >> on such a large region fails if not enough vmalloc() space is available. >> >> This was observed when somebody tested this on CardHu which has a 1 GiB >> of RAM and therefore remapping the full 256 MiB fails. ... > Have you checked if the hardware supports an alternative config > space access mechanism that does not depend on a huge address range? > A lot of them provide an index/data register pair somewhere, as the > original PC implementation did. That would be nice, but I've talked to the HW engineers, and there's no indication that any alternative mechanism exists. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
