From: "shun-yi.wang" <shun-yi.wang@xxxxxxxxxxxx>
In order to reserve specific Contiguous Memory Allocator (CMA) regions
for hardware use. When the name of the reserved region contains "cma",
then a corresponding CMA heap is added.
In the DTS (Device Tree Source), we may have several memory regions
with different names, e.g.,
&scp {
...
memory-region = <&mem_reserved_1>, <&mem_reserved_2>;
};
mem_reserved_1: xxx-xxx-region {
...
};
mem_reserved_2: xxx-xxx-cma-region {
...
};
When the name of the region contains "cma", a corresponding heap
allocator is added by cma_heap_add().
However, we are unsure if using the name "cma" as an identifier
is a good practice.
I sincerely hope that you can provide me some suggestions, thanks.
Especially within the segment of '#ifdef CONFIG_DMA_BUF_HEAPS_CMA'
Note: The cma_heap_add() is introduced from this patch:
dma-buf: heaps: Introduce cma_heap_add() for non-default CMA heap
shun-yi.wang (1):
remoteproc: mediatek: Support reserved CMA regions
drivers/remoteproc/mtk_scp.c | 38 ++++++++++++++++++++++++++++--------
1 file changed, 30 insertions(+), 8 deletions(-)
--
2.18.0
