This series fixes several issues related to 'dma-ranges'. Primarily, 'dma-ranges' in a PCI bridge node does correctly set dma masks for PCI devices not described in the DT. A common case needing dma-ranges is a 32-bit PCIe bridge on a 64-bit system. This affects several platforms including Broadcom, NXP, Renesas, and Arm Juno. There's been several attempts to fix these issues, most recently earlier this week[1]. In the process, I found several bugs in the address translation. It appears that things have happened to work as various DTs happen to use 1:1 addresses. First 3 patches are just some clean-up. The 4th patch adds a unittest exhibiting the issues. Patches 5-9 rework how of_dma_configure() works making it work on either a struct device child node or a struct device_node parent node so that it works on bus leaf nodes like PCI bridges. Patches 10 and 11 fix 2 issues with address translation for dma-ranges. My testing on this has been with QEMU virt machine hacked up to set PCI dma-ranges and the unittest. Nicolas reports this series resolves the issues on Rpi4 and NXP Layerscape platforms. Rob [1] https://lore.kernel.org/linux-arm-kernel/20190924181244.7159-1-nsaenzjulienne@xxxxxxx/ Rob Herring (5): of: Remove unused of_find_matching_node_by_address() of: Make of_dma_get_range() private of/unittest: Add dma-ranges address translation tests of/address: Translate 'dma-ranges' for parent nodes missing 'dma-ranges' of/address: Fix of_pci_range_parser_one translation of DMA addresses Robin Murphy (6): of: address: Report of_dma_get_range() errors meaningfully of: Ratify of_dma_configure() interface of/address: Introduce of_get_next_dma_parent() helper of: address: Follow DMA parent for "dma-coherent" of: Factor out #{addr,size}-cells parsing of: Make of_dma_get_range() work on bus nodes drivers/of/address.c | 83 +++++++++---------- drivers/of/base.c | 32 ++++--- drivers/of/device.c | 12 ++- drivers/of/of_private.h | 14 ++++ drivers/of/unittest-data/testcases.dts | 1 + drivers/of/unittest-data/tests-address.dtsi | 48 +++++++++++ drivers/of/unittest.c | 92 +++++++++++++++++++++ include/linux/of_address.h | 21 +---- include/linux/of_device.h | 4 +- 9 files changed, 227 insertions(+), 80 deletions(-) create mode 100644 drivers/of/unittest-data/tests-address.dtsi -- 2.20.1
