These functions, instead of relying on hard-coded platform-specific address translations, make use of the DMA constraints provided by the DM core. This allows for per-device translations.
We can't yet get rid of the legacy phys_to_bus()/bus_to_phys() implementations as some of its users are not integrated into the device model.
Signed-off-by: Nicolas Saenz Julienne nsaenzjulienne@suse.de Reviewed-by: Simon Glass sjg@chromium.org
--- Changes since v2: - Use CONFIG_DM_DMA
include/phys2bus.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/include/phys2bus.h b/include/phys2bus.h index dc9b8e5a25..516d630aea 100644 --- a/include/phys2bus.h +++ b/include/phys2bus.h @@ -21,4 +21,20 @@ static inline unsigned long bus_to_phys(unsigned long bus) } #endif
+#if CONFIG_IS_ENABLED(DM_DMA) +#include <dm/device.h> + +static inline dma_addr_t dev_phys_to_bus(struct udevice *dev, + phys_addr_t phys) +{ + return phys - dev->dma_offset; +} + +static inline phys_addr_t dev_bus_to_phys(struct udevice *dev, + dma_addr_t bus) +{ + return bus + dev->dma_offset; +} +#endif + #endif