diff options
| author | Will Deacon <will.deacon@arm.com> | 2014-08-27 16:24:20 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-12-01 16:50:45 +0000 |
| commit | 97890ba9289c66e23f2f2d431937693b6498d6f6 (patch) | |
| tree | fce6fcfd86ad149adfdae5c04245cc75342d2608 /drivers | |
| parent | 461bfb3fe7d0cf64d9ee2190ad8507e460fab198 (diff) | |
| download | linux-97890ba9289c66e23f2f2d431937693b6498d6f6.tar.bz2 | |
dma-mapping: detect and configure IOMMU in of_dma_configure
This patch extends of_dma_configure so that it sets up the IOMMU for a
device, as well as the coherent/non-coherent DMA mapping ops.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/of/platform.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/of/platform.c b/drivers/of/platform.c index ff1f4e9afccb..b89caf8c7586 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -19,6 +19,7 @@ #include <linux/slab.h> #include <linux/of_address.h> #include <linux/of_device.h> +#include <linux/of_iommu.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <linux/platform_device.h> @@ -166,6 +167,7 @@ static void of_dma_configure(struct device *dev) int ret; bool coherent; unsigned long offset; + struct iommu_ops *iommu; /* * Set default dma-mask to 32 bit. Drivers are expected to setup @@ -194,7 +196,16 @@ static void of_dma_configure(struct device *dev) dev_dbg(dev, "device is%sdma coherent\n", coherent ? " " : " not "); - arch_setup_dma_ops(dev, coherent); + iommu = of_iommu_configure(dev); + dev_dbg(dev, "device is%sbehind an iommu\n", + iommu ? " " : " not "); + + arch_setup_dma_ops(dev, dma_addr, size, iommu, coherent); +} + +static void of_dma_deconfigure(struct device *dev) +{ + arch_teardown_dma_ops(dev); } /** @@ -223,16 +234,12 @@ static struct platform_device *of_platform_device_create_pdata( if (!dev) goto err_clear_flag; - of_dma_configure(&dev->dev); dev->dev.bus = &platform_bus_type; dev->dev.platform_data = platform_data; - - /* We do not fill the DMA ops for platform devices by default. - * This is currently the responsibility of the platform code - * to do such, possibly using a device notifier - */ + of_dma_configure(&dev->dev); if (of_device_add(dev) != 0) { + of_dma_deconfigure(&dev->dev); platform_device_put(dev); goto err_clear_flag; } |