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authorMurali Karicheri <m-karicheri2@ti.com>2015-03-03 20:52:08 +0300
committerBjorn Helgaas <bhelgaas@google.com>2015-03-03 23:42:55 +0300
commited748621031c2a205749997421e59fb4dfb1e909 (patch)
tree4739a881d9124fba79ba8b2ce40aed26158d91fb /include/linux/of_iommu.h
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
downloadlinux-ed748621031c2a205749997421e59fb4dfb1e909.tar.xz
of: iommu: Add ptr to OF node arg to of_iommu_configure()
of_iommu_configure() is called from of_dma_configure() to setup iommu ops using DT property. This API is currently used for platform devices for which DMA configuration (including IOMMU ops) may come from the device's parent. To extend this functionality for PCI devices, this API needs to take a parent node ptr as an argument instead of assuming device's parent. This is needed since for PCI, the DMA configuration may be defined in the DT node of the root bus bridge's parent device. Currently only dma-range is used for PCI and IOMMU is not supported. Return error if the device is PCI. Add "parent" parameter (a struct device_node *) to of_iommu_configure(). 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: Rob Herring <robh+dt@kernel.org> Acked-by: Will Deacon <will.deacon@arm.com> CC: Joerg Roedel <joro@8bytes.org> CC: Grant Likely <grant.likely@linaro.org> CC: Russell King <linux@arm.linux.org.uk> CC: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/linux/of_iommu.h')
-rw-r--r--include/linux/of_iommu.h6
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index 16c75547d725..ffbe4707d4aa 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -12,7 +12,8 @@ extern int of_get_dma_window(struct device_node *dn, const char *prefix,
size_t *size);
extern void of_iommu_init(void);
-extern struct iommu_ops *of_iommu_configure(struct device *dev);
+extern struct iommu_ops *of_iommu_configure(struct device *dev,
+ struct device_node *master_np);
#else
@@ -24,7 +25,8 @@ static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
}
static inline void of_iommu_init(void) { }
-static inline struct iommu_ops *of_iommu_configure(struct device *dev)
+static inline struct iommu_ops *of_iommu_configure(struct device *dev,
+ struct device_node *master_np)
{
return NULL;
}