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 <nsaenzjulie...@suse.de>
Reviewed-by: Simon Glass <s...@chromium.org>
Reviewed-by: Stefan Roese <s...@denx.de>
---
Changes since v4:
- Introduce macros for !DM case to make API usage cleaner
Changes since v2:
- Use CONFIG_DM_DMA
include/phys2bus.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/include/phys2bus.h b/include/phys2bus.h
index dc9b8e5a25..866b8b51a8 100644
--- a/include/phys2bus.h
+++ b/include/phys2bus.h
@@ -21,4 +21,21 @@ static inline unsigned long bus_to_phys(unsigned long bus)
}
#endif
+#if CONFIG_IS_ENABLED(DM)
+#include <dm/device.h>
+
+static inline dma_addr_t dev_phys_to_bus(struct udevice *dev, phys_addr_t phys)
+{
+ return phys - dev_get_dma_offset(dev);
+}
+
+static inline phys_addr_t dev_bus_to_phys(struct udevice *dev, dma_addr_t bus)
+{
+ return bus + dev_get_dma_offset(dev);
+}
+#else
+#define dev_phys_to_bus(_, _addr) _addr
+#define dev_bus_to_phys(_, _addr) _addr
+#endif
+
#endif
--
2.29.2
