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linux/kernel/dma
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Oreoluwa Babatunde 0fd17e5983 of: reserved_mem: Allow reserved_mem framework detect "cma=" kernel param 
When initializing the default cma region, the "cma=" kernel parameter
takes priority over a DT defined linux,cma-default region. Hence, give
the reserved_mem framework the ability to detect this so that the DT
defined cma region can skip initialization accordingly.

Signed-off-by: Oreoluwa Babatunde <oreoluwa.babatunde@oss.qualcomm.com>
Tested-by: Joy Zou <joy.zou@nxp.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Fixes: 8a6e02d0c0 ("of: reserved_mem: Restructure how the reserved memory regions are processed")
Fixes: 2c223f7239 ("of: reserved_mem: Restructure call site for dma_contiguous_early_fixup()")
Link: https://lore.kernel.org/r/20251210002027.1171519-1-oreoluwa.babatunde@oss.qualcomm.com
[mszyprow: rebased onto v6.19-rc1, added fixes tags, added a stub for
 cma_skip_dt_default_reserved_mem() if no CONFIG_DMA_CMA is set]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2026-01-29 00:26:36 +01:00
..
coherent.c dma-coherent: Warn if OF reserved memory is beyond current coherent DMA mask 2025-04-22 17:44:09 +02:00
contiguous.c of: reserved_mem: Allow reserved_mem framework detect "cma=" kernel param 2026-01-29 00:26:36 +01:00
debug.c dma-debug: don't report false positives with DMA_BOUNCE_UNALIGNED_KMALLOC 2025-10-15 13:24:33 -07:00
debug.h dma-mapping: export new dma_*map_phys() interface 2025-09-12 00:18:21 +02:00
direct.c VFIO updates for v6.19-rc1 2025-12-04 18:42:48 -08:00
direct.h dma-mapping: convert dma_direct_*map_page to be phys_addr_t based 2025-09-12 00:18:20 +02:00
dummy.c dma-mapping: convert dummy ops to physical address mapping 2025-10-29 10:27:29 +01:00
Kconfig dma-debug: remove DMA_API_DEBUG_SG 2024-10-29 08:53:37 +01:00
Makefile dma-mapping: clearly mark DMA ops as an architecture feature 2024-09-04 07:08:51 +03:00
map_benchmark.c tools/dma: move dma_map_benchmark from selftests to tools/dma 2025-10-29 09:41:40 +01:00
mapping.c dma-mapping: remove unused map_page callback 2025-10-29 10:27:31 +01:00
ops_helpers.c dma-mapping: remove unused map_page callback 2025-10-29 10:27:31 +01:00
pool.c dma/pool: Avoid allocating redundant pools 2026-01-14 11:00:00 +01:00
remap.c dma-remap: drop nth_page() in dma_common_contiguous_remap() 2025-09-21 14:22:06 -07:00
swiotlb.c mm: make INVALID_PHYS_ADDR a generic macro 2025-11-16 17:28:26 -08:00