Messages in this thread | | | Date | Mon, 26 Jan 2015 18:28:54 -0500 | From | Murali Karicheri <> | Subject | Re: [PATCH v4 5/6] PCI: update dma configuration from DT |
| |
On 01/23/2015 06:27 PM, Bjorn Helgaas wrote: > On Fri, Jan 23, 2015 at 05:32:38PM -0500, Murali Karicheri wrote: >> If there is a DT node available for the root bridge's parent device, >> use the dma configuration from that device node. For example, keystone >> PCI devices would require dma_pfn_offset to be set correctly in the >> device structure of the pci device in order to have the correct dma mask. >> The DT node will have dma-ranges defined for this. Also support using >> the DT property dma-coherent to allow coherent DMA operation by the >> PCI device. >> >> This patch use the new helper function of_pci_dma_configure() to update >> the device dma configuration. >> >> Cc: Joerg Roedel<joro@8bytes.org> >> Cc: Grant Likely<grant.likely@linaro.org> >> Cc: Rob Herring<robh+dt@kernel.org> >> Cc: Bjorn Helgaas<bhelgaas@google.com> >> Cc: Will Deacon<will.deacon@arm.com> >> Cc: Russell King<linux@arm.linux.org.uk> >> Cc: Arnd Bergmann<arnd@arndb.de> >> Cc: Suravee Suthikulpanit<Suravee.Suthikulpanit@amd.com> >> >> Signed-off-by: Murali Karicheri<m-karicheri2@ti.com> > > I assume this series will be merged via some non-PCI tree, so:
Not sure who will pick this. Since this is for PCI, will it be possible to apply this to arm-pci/next?
> > Acked-by: Bjorn Helgaas<bhelgaas@google.com>
I will add your ack for v5.
Murali > >> --- >> drivers/pci/probe.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c >> index 23212f8..d7dcd6c 100644 >> --- a/drivers/pci/probe.c >> +++ b/drivers/pci/probe.c >> @@ -6,6 +6,7 @@ >> #include<linux/delay.h> >> #include<linux/init.h> >> #include<linux/pci.h> >> +#include<linux/of_pci.h> >> #include<linux/pci_hotplug.h> >> #include<linux/slab.h> >> #include<linux/module.h> >> @@ -1520,6 +1521,7 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus) >> dev->dev.dma_mask =&dev->dma_mask; >> dev->dev.dma_parms =&dev->dma_parms; >> dev->dev.coherent_dma_mask = 0xffffffffull; >> + of_pci_dma_configure(dev); >> >> pci_set_dma_max_seg_size(dev, 65536); >> pci_set_dma_seg_boundary(dev, 0xffffffff); >> -- >> 1.7.9.5 >>
-- Murali Karicheri Linux Kernel, Texas Instruments
| |