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path: root/drivers/of/of_reserved_mem.c
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2015-01-13drivers: of: Export of_reserved_mem_device_{init,release}George G. Davis1-0/+2
Export of_reserved_mem_device_{init,release} so that modules can initialize and release their assigned per-device cma_area. Signed-off-by: George G. Davis <george_davis@mentor.com> [robh: s/EXPORT_SYMBOL/EXPORT_SYMBOL_GPL/] Signed-off-by: Rob Herring <robh@kernel.org>
2014-10-29drivers: of: add return value to of_reserved_mem_device_init()Marek Szyprowski1-5/+9
Driver calling of_reserved_mem_device_init() might be interested if the initialization has been successful or not, so add support for returning error code. This fixes a build warining caused by commit 7bfa5ab6fa1b ("drivers: dma-coherent: add initialization from device tree"), which has been merged without this change and without fixing function return value. Fixes: 7bfa5ab6fa1b1 ("drivers: dma-coherent: add initialization from device tree") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Laura Abbott <lauraa@codeaurora.org> Cc: Josh Cartwright <joshc@codeaurora.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-01drivers: of: add automated assignment of reserved regions to client devicesMarek Szyprowski1-0/+70
This patch adds code for automated assignment of reserved memory regions to struct device. reserved_mem->ops->device_init()/device_cleanup() callbacks are called to perform reserved memory driver specific initialization and cleanup Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-05-20of: align RESERVEDMEM_OF_DECLARE function callbacks to other callbacksRob Herring1-1/+1
All the parameters for RESERVEDMEM_OF_DECLARE function callbacks are members of struct reserved_mem, so just pass the struct ptr to callback functions so the function callback is more in line with other OF match table callbacks. Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Rob Herring <robh@kernel.org>
2014-04-30of/fdt: update of_get_flat_dt_prop in prep for libfdtRob Herring1-2/+2
Make of_get_flat_dt_prop arguments compatible with libfdt fdt_getprop call in preparation to convert FDT code to use libfdt. Make the return value const and the property length ptr type an int. Signed-off-by: Rob Herring <robh@kernel.org> Tested-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Grant Likely <grant.likely@linaro.org> Tested-by: Stephen Chivers <schivers@csc.com>
2014-03-11drivers: of: add support for custom reserved memory driversMarek Szyprowski1-0/+29
Add support for custom reserved memory drivers. Call their init() function for each reserved region and prepare for using operations provided by them with by the reserved_mem->ops array. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-03-11drivers: of: add initialization code for dynamic reserved memoryMarek Szyprowski1-0/+188
This patch adds support for dynamically allocated reserved memory regions declared in device tree. Such regions are defined by 'size', 'alignment' and 'alloc-ranges' properties. Based on previous code provided by Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-10-15Revert "drivers: of: add initialization code for dma reserved memory"Marek Szyprowski1-173/+0
This reverts commit 9d8eab7af79cb4ce2de5de39f82c455b1f796963. There is still no consensus on the bindings for the reserved memory and various drawbacks of the proposed solution has been shown, so the best now is to revert it completely and start again from scratch later. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>
2013-09-10drivers: of: fix build break if asm/dma-contiguous.h is missingMarek Szyprowski1-2/+0
It is not needed to include asm/dma-contiguous.h header to compile reserved memory initialization code, so remove it to avoid build break on architectures without CMA support. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Tested-by: Guenter Roeck <linux@roeck-us.net>
2013-08-27drivers: of: add initialization code for dma reserved memoryMarek Szyprowski1-0/+175
This patch adds device tree support for contiguous and reserved memory regions defined in device tree. Large memory blocks can be reliably reserved only during early boot. This must happen before the whole memory management subsystem is initialized, because we need to ensure that the given contiguous blocks are not yet allocated by kernel. Also it must happen before kernel mappings for the whole low memory are created, to ensure that there will be no mappings (for reserved blocks) or mapping with special properties can be created (for CMA blocks). This all happens before device tree structures are unflattened, so we need to get reserved memory layout directly from fdt. Later, those reserved memory regions are assigned to devices on each device structure initialization. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Michal Nazarewicz <mina86@mina86.com> Acked-by: Tomasz Figa <t.figa@samsung.com> Acked-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Rob Herring <rob.herring@calxeda.com>