On Wed, Nov 08, 2017 at 12:45:49PM +0000, Joao Pinto wrote: > 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. OK, thanks. This may push this series out until v4.16 because the v4.15 merge window will probably open Sunday, and I don't like to add code during the window and merge it immediately. Bjorn
