diff options
Diffstat (limited to 'include/dm/read.h')
| -rw-r--r-- | include/dm/read.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/dm/read.h b/include/dm/read.h index 97575bcad0..5bf3405614 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -648,6 +648,21 @@ u64 dev_translate_dma_address(const struct udevice *dev, const fdt32_t *in_addr); /** + * dev_get_dma_range() - Get a device's DMA constraints + * + * Provide the address bases and size of the linear mapping between the CPU and + * a device's BUS address space. + * + * @dev: device giving the context in which to translate the DMA address + * @cpu: base address for CPU's view of memory + * @bus: base address for BUS's view of memory + * @size: size of the address space + * @return 0 if ok, negative on error + */ +int dev_get_dma_range(const struct udevice *dev, phys_addr_t *cpu, + dma_addr_t *bus, u64 *size); + +/** * dev_read_alias_highest_id - Get highest alias id for the given stem * @stem: Alias stem to be examined * @@ -1005,6 +1020,12 @@ static inline u64 dev_translate_dma_address(const struct udevice *dev, return ofnode_translate_dma_address(dev_ofnode(dev), in_addr); } +static inline int dev_get_dma_range(const struct udevice *dev, phys_addr_t *cpu, + dma_addr_t *bus, u64 *size) +{ + return ofnode_get_dma_range(dev_ofnode(dev), cpu, bus, size); +} + static inline int dev_read_alias_highest_id(const char *stem) { if (!CONFIG_IS_ENABLED(OF_LIBFDT) || !gd->fdt_blob) |