Hello to all, Às 12:56 AM de 11/8/2017, Bjorn Helgaas escreveu: > On Fri, Nov 03, 2017 at 02:47:05PM +0100, Niklas Cassel wrote: >> Use the DMA-API to get the MSI address. This address will be written to >> our PCI config space and to the register which determines which AXI >> address the DWC IP will spoof for incoming MSI irqs. >> >> Since it is a PCIe endpoint device, rather than the CPU, that is supposed >> to write to the MSI address, the proper way to get the MSI address is by >> using the DMA API, not by using virt_to_phys(). >> >> Using virt_to_phys() might work on some systems, but using the DMA API >> should work on all systems. >> >> This is essentially the same thing as allocating a buffer in a driver >> to which the endpoint will write to. To do this, we use the DMA API. >> >> Signed-off-by: Niklas Cassel <niklas.cassel@xxxxxxxx> > > I'm expecting Jingoo and/or Joao to chime in and ack the > DesignWare-related patches. I think all the others are in > pretty good shape. > >> --- >> drivers/pci/dwc/pcie-designware-host.c | 15 ++++++++++++--- >> drivers/pci/dwc/pcie-designware.h | 3 ++- >> 2 files changed, 14 insertions(+), 4 deletions(-) >> ... Let me test this patch-set in my setup first! I will give feedback until Friday. Thanks, Joao
