On Tue, Jun 11, 2019 at 5:07 PM Christoph Hellwig <h...@infradead.org> wrote: > > On Tue, Jun 11, 2019 at 03:30:08PM +0300, Oded Gabbay wrote: > > Hello POWER developers, > > > > I'm trying to find out if there is an internal kernel API so that a > > PCI driver can call it to check if its PCI device is running inside a > > POWER9 machine. Alternatively, if that's not available, if it is > > running on a machine with powerpc architecture. > > Your driver has absolutely not business knowing this. > > > > > I need this information as my device (Goya AI accelerator) > > unfortunately needs a slightly different configuration of its PCIe > > controller in case of POWER9 (need to set bit 59 to be 1 in all > > outbound transactions). > > No, it doesn't. You can query the output from dma_get_required_mask > to optimize for the DMA addresses you get, and otherwise you simply > set the maximum dma mask you support. That is about the control you > get, and nothing else is a drivers business.
I don't want to conduct two discussions as I saw you answered on my patch. I'll add the ppc mailing list to my patch. Oded
