Nicolas Saenz Julienne a7ba70f178 dma-mapping: treat dev->bus_dma_mask as a DMA limit ... Using a mask to represent bus DMA constraints has a set of limitations. The biggest one being it can only hold a power of two (minus one). The DMA mapping code is already aware of this and treats dev->bus_dma_mask as a limit. This quirk is already used by some architectures although still rare. With the introduction of the Raspberry Pi 4 we've found a new contender for the use of bus DMA limits, as its PCIe bus can only address the lower 3GB of memory (of a total of 4GB). This is impossible to represent with a mask. To make things worse the device-tree code rounds non power of two bus DMA limits to the next power of two, which is unacceptable in this case. In the light of this, rename dev->bus_dma_mask to dev->bus_dma_limit all over the tree and treat it as such. Note that dev->bus_dma_limit should contain the higher accessible DMA address. Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de>		2019-11-21 18:14:35 +01:00
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unittest-data
address.c
base.c	of: restore old handling of cells_name=NULL in of_*_phandle_with_args()	2019-09-19 08:33:02 -05:00
device.c	dma-mapping: treat dev->bus_dma_mask as a DMA limit	2019-11-21 18:14:35 +01:00
dynamic.c
fdt_address.c
fdt.c	fdt: Update CRC check for rng-seed	2019-08-27 12:27:07 +01:00
irq.c
Kconfig
kobj.c
Makefile
of_mdio.c	of: mdio: Fix a signedness bug in of_phy_get_and_connect()	2019-09-27 10:19:09 +02:00
of_net.c
of_numa.c
of_private.h
of_reserved_mem.c	of: reserved_mem: add missing of_node_put() for proper ref-counting	2019-10-23 15:15:05 -05:00
overlay.c
pdt.c
platform.c
property.c
resolver.c
unittest.c	of: unittest: fix memory leak in unittest_data_add	2019-10-23 14:42:44 -05:00