Ything-RepoMirrors/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-01-25 07:47:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

dma: contiguous: Reserve default CMA heap

Browse Source 
The CMA code, in addition to the reserved-memory regions in the device
tree, will also register a default CMA region if the device tree doesn't
provide any, with its size and position coming from either the kernel
command-line or configuration.

Let's register that one for use to create a heap for it.

Reviewed-by: T.J. Mercier <tjmercier@google.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://lore.kernel.org/r/20251013-dma-buf-ecc-heap-v8-4-04ce150ea3d9@kernel.org
This commit is contained in:
Maxime Ripard
2025-10-13 10:35:19 +02:00
committed by Sumit Semwal
parent 84a593066a
commit 8f1fc1bf1a
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
kernel/dma/contiguous.c
View File

@@ -242,6 +242,8 @@ void __init dma_contiguous_reserve(phys_addr_t limit)
}
if (selected_size && !dma_contiguous_default_area) {
int ret;
pr_debug("%s: reserving %ld MiB for global area\n", __func__,
(unsigned long)selected_size / SZ_1M);
@@ -249,6 +251,10 @@ void __init dma_contiguous_reserve(phys_addr_t limit)
selected_limit,
&dma_contiguous_default_area,
fixed);
ret = dma_heap_cma_register_heap(dma_contiguous_default_area);
if (ret)
pr_warn("Couldn't register default CMA heap.");
}
}