kernel/linux.git/include/linux/of_reserved_mem.h, branch v7.1-rc5

of: reserved_mem: replace CMA quirks by generic methods

2026-03-26T19:12:02+00:00

Add optional reserved memory callbacks to perform region verification and early fixup, then move all CMA related code in of_reserved_mem.c to them. Signed-off-by: Marek Szyprowski Link: https://patch.msgid.link/20260325090023.3175348-5-m.szyprowski@samsung.com Signed-off-by: Rob Herring (Arm)

of: reserved_mem: switch to ops based OF_DECLARE()

2026-03-26T19:12:02+00:00

Move init function from OF_DECLARE() argument to the given reserved memory region ops structure and then pass that structure to the OF_DECLARE() initializer. This node_init callback is mandatory for the reserved mem driver. Such change makes it possible in the future to add more functions called by the generic code before given memory region is initialized and rmem object is created. Signed-off-by: Marek Szyprowski Link: https://patch.msgid.link/20260325090023.3175348-4-m.szyprowski@samsung.com Signed-off-by: Rob Herring (Arm)

of: reserved_mem: remove fdt node from the structure

2026-03-26T19:12:02+00:00

FDT node is not needed for anything besides the initialization, so it can be simply passed as an argument to the reserved memory region init function. Signed-off-by: Marek Szyprowski Link: https://patch.msgid.link/20260325090023.3175348-2-m.szyprowski@samsung.com Signed-off-by: Rob Herring (Arm)

of: reserved_mem: Add functions to parse "memory-region"

2025-05-05T21:17:40+00:00

Drivers with "memory-region" properties currently have to do their own parsing of "memory-region" properties. The result is all the drivers have similar patterns of a call to parse "memory-region" and then get the region's address and size. As this is a standard property, it should have common functions for drivers to use. Add new functions to count the number of regions and retrieve the region's address as a resource. Reviewed-by: Daniel Baluta Acked-by: Arnaud Pouliquen Link: https://lore.kernel.org/r/20250423-dt-memory-region-v2-v2-1-2fbd6ebd3c88@kernel.org Signed-off-by: Rob Herring (Arm)

of: reserved_mem: Remove the use of phandle from the reserved_mem APIs

2024-05-03T12:49:13+00:00

The __find_rmem() function is the only place that references the phandle field of the reserved_mem struct. __find_rmem() is used to match a device_node object to its corresponding entry in the reserved_mem array using its phandle value. But, there is already a function called of_reserved_mem_lookup() which carries out the same action using the name of the node. Using the of_reserved_mem_lookup() function is more reliable because every node is guaranteed to have a name, but not all nodes will have a phandle. Nodes are only assigned a phandle if they are explicitly defined in the DT using "phandle = ", or if they are referenced by another node in the DT. Hence, If the phandle field is empty, then __find_rmem() will return a false negative. Hence, delete the __find_rmem() function and switch to using the of_reserved_mem_lookup() function to find the corresponding entry of a device_node in the reserved_mem array. Since the phandle field of the reserved_mem struct is now unused, delete that as well. Signed-off-by: Oreoluwa Babatunde Link: https://lore.kernel.org/r/20240502192403.3307277-1-quic_obabatun@quicinc.com Signed-off-by: Rob Herring (Arm)

of: reserved-memory: Add stub for RESERVEDMEM_OF_DECLARE()

2021-06-21T19:56:46+00:00

The reserved-memory Kconfig could be disabled when drivers are compile-tested. In this case RESERVEDMEM_OF_DECLARE() produces a noisy warning about the orphaned __reservedmem_of_table section. Add the missing stub that fixes the warning. In particular this is needed for compile-testing of NVIDIA Tegra210 memory driver which uses reserved-memory. Reported-by: Krzysztof Kozlowski Signed-off-by: Dmitry Osipenko Acked-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20210610162313.20942-1-digetx@gmail.com Signed-off-by: Rob Herring

of: Move reserved memory private function declarations

2021-06-03T01:59:28+00:00

fdt_init_reserved_mem() and fdt_reserved_mem_save_node() are private to the DT code, so move there declarations to of_private.h. There's no need for the dummy functions as CONFIG_OF_RESERVED_MEM is always enabled for CONFIG_OF_EARLY_FLATTREE. Cc: Frank Rowand Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20210527193841.1284169-1-robh@kernel.org

of: Make self-contained

2020-05-12T20:45:39+00:00

is not self-contained, as it uses _OF_DECLARE() to define RESERVEDMEM_OF_DECLARE(), but does not include . Fix this by adding the missing include. Signed-off-by: Geert Uytterhoeven Reviewed-by: Thierry Reding Acked-by: Rob Herring Signed-off-by: Thierry Reding

of: reserved-memory: Support lookup of regions by name

2020-04-30T10:38:01+00:00

Add support for looking up memory regions by name. This looks up the given name in the newly introduced memory-region-names property and returns the memory region at the corresponding index in the memory- region(s) property. Reviewed-by: Rob Herring Signed-off-by: Thierry Reding

of: mark early_init_dt_alloc_reserved_memory_arch static

2019-02-28T17:40:49+00:00

This function is only used in of_reserved_mem.c, and never overridden despite the __weak marker. Signed-off-by: Christoph Hellwig Signed-off-by: Rob Herring