Zhenhua Huang f875db4f20 Revert "dma-contiguous: check for memory region overlap" ... This reverts commit 3fa6456ebe. The Commit broke the CMA region creation through DT on arm64, as showed below logs with "memblock=debug": [ 0.000000] memblock_phys_alloc_range: 41943040 bytes align=0x200000 from=0x0000000000000000 max_addr=0x00000000ffffffff early_init_dt_alloc_reserved_memory_arch+0x34/0xa0 [ 0.000000] memblock_reserve: [0x00000000fd600000-0x00000000ffdfffff] memblock_alloc_range_nid+0xc0/0x19c [ 0.000000] Reserved memory: overlap with other memblock reserved region >From call flow, region we defined in DT was always reserved before entering into rmem_cma_setup. Also, rmem_cma_setup has one routine cma_init_reserved_mem to ensure the region was reserved. Checking the region not reserved here seems not correct. early_init_fdt_scan_reserved_mem: fdt_scan_reserved_mem __reserved_mem_reserve_reg early_init_dt_reserve_memory memblock_reserve(using “reg” prop case) fdt_init_reserved_mem __reserved_mem_alloc_size *early_init_dt_alloc_reserved_memory_arch* memblock_reserve(dynamic alloc case) __reserved_mem_init_node rmem_cma_setup(region overlap check here should always fail) Example DT can be used to reproduce issue: dump_mem: mem_dump_region { compatible = "shared-dma-pool"; alloc-ranges = <0x0 0x00000000 0x0 0xffffffff>; reusable; size = <0 0x2800000>; }; Signed-off-by: Zhenhua Huang <quic_zhenhuah@quicinc.com>		2023-09-08 05:58:32 -03:00
..
Kconfig	dma-contiguous: fix the Kconfig entry for CONFIG_DMA_NUMA_CMA	2023-08-30 13:52:53 +02:00
Makefile	dma-mapping: remove CONFIG_DMA_REMAP	2022-03-03 14:00:57 +03:00
coherent.c	dma-mapping: Add dma_release_coherent_memory to DMA API	2022-06-24 09:30:54 -06:00
contiguous.c	Revert "dma-contiguous: check for memory region overlap"	2023-09-08 05:58:32 -03:00
debug.c	dma-debug: don't call __dma_entry_alloc_check_leak() under free_entries_lock	2023-08-30 11:29:08 +02:00
debug.h	dma-debug: teach add_dma_entry() about DMA_ATTR_SKIP_CPU_SYNC	2021-10-18 12:46:45 +02:00
direct.c	swiotlb: if swiotlb is full, fall back to a transient memory pool	2023-08-01 18:02:20 +02:00
direct.h	dma-mapping: force bouncing if the kmalloc() size is not cache-line-aligned	2023-06-19 16:19:23 -07:00
dummy.c	dma-mapping: return error code from dma_dummy_map_sg()	2021-08-09 17:13:06 +02:00
map_benchmark.c	dma-mapping: benchmark: remove MODULE_LICENSE in non-modules	2023-04-13 13:13:51 -07:00
mapping.c	dma-mapping: move arch_dma_set_mask() declaration to header	2023-07-31 17:54:28 +02:00
ops_helpers.c	dma-mapping: handle vmalloc addresses in dma_common_{mmap,get_sgtable}	2021-07-16 11:30:26 +02:00
pool.c	dma-pool: remove a __maybe_unused label in atomic_pool_expand	2023-08-31 14:12:37 +02:00
remap.c	dma-remap: use kvmalloc_array/kvfree for larger dma memory remap	2023-06-07 15:06:28 +02:00
swiotlb.c	swiotlb: optimize get_max_slots()	2023-08-08 10:29:21 -07:00