Arnd, 2015-11-22 21:02 GMT+01:00 Arnd Bergmann <a...@arndb.de>: > On Sunday 22 November 2015 08:53:53 Marcin Wojtas wrote: >> This commit enables finding appropriate mbus window and obtaining its >> target id and attribute for given physical address in two separate >> routines, both for IO and DRAM windows. This functionality >> is needed for Armada XP/38x Network Controller's Buffer Manager and >> PnC configuration. >> >> Signed-off-by: Marcin Wojtas <m...@semihalf.com> >> >> [DRAM window information reference in LKv3.10] >> Signed-off-by: Evan Wang <xsw...@marvell.com> >> > > It's too long ago to remember all the details, but I thought we > had designed this so the configuration can just be done by > describing it in DT. What am I missing? >
And those functions do not break this approach. They just enable finding and reading the settings of MBUS windows done during initial configuration. Please remember that mvebu-mbus driver fills the MBUS windows registers basing on DT, however it just configures access CPU - DRAM/perfipheral. In this particular case only physical adresses of buffers are known and we have to 'open windows' between BM <-> DRAM and NETA <-> BM internal memory. Hence instead of hardcoding size/target/attribute, we can take information stored in CPU DRAM/IO windows registers. Best regards, Marcin -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html