diff options
| author | Murali Karicheri <m-karicheri2@ti.com> | 2015-03-03 18:52:13 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-03-12 17:43:09 +0100 |
| commit | de335bb49269037d1e8906ba59f8bacba732bec6 (patch) | |
| tree | 752f43488c0b28a220ea157b2e274d408c68aee6 /drivers/pci/probe.c | |
| parent | of/pci: Add of_pci_dma_configure() to update DMA configuration (diff) | |
| download | linux-de335bb49269037d1e8906ba59f8bacba732bec6.tar.xz linux-de335bb49269037d1e8906ba59f8bacba732bec6.zip | |
PCI: Update DMA configuration from DT
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.
Use the new helper function of_pci_dma_configure() to update the device DMA
configuration. This fixes DMA on systems where DMA addresses are a
constant offset from CPU physical addresses.
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> (AMD Seattle)
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
CC: Joerg Roedel <joro@8bytes.org>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 8d2f400e96cb..413c1dd431b9 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); |