This series could be split into at least two or even three parts, but I kept it as is for now as it contains all the changes needed in order to have u-boot working on the new Raspberry Pi 400 and Raspberry Pi Compute Module 4.
There are core changes, specifically with regard to cpu to bus address space translations. So far we had relied on hard-coded values but RPi needs per device translations as it has at least three distinct bus address spaces with different offsets. So it's a good opportunity to implement bus translations the right way by parsing DT's dma-ranges.
Here's a more concrete example of what we're dealing with:
- On a RPi4, SoC version BCM2711C0 with 8GB of memory
[0x0 0x200000000] [0x200000000 0x400000000] [0xc0000000 0x100000000] [0x00000000 0x100000000] phys/cpu address PCIe bus address Legacy peripheral emmc2 address space space address space space
- On a RPi4, SoC version BCM2711C0 with 4GB of memory
[0x0 0x100000000] [0x100000000 0x200000000] [0xc0000000 0x100000000] [0x00000000 0x100000000] phys/cpu address PCIe bus address Legacy peripheral emmc2 address space space address space space
- On a RPi4, SoC version BCM2711B0 with 8GB of memory (bus can only access the lower 3GB of memory because of a SoC routing bug)
[0x0 0x200000000] [0x00000000 0xC0000000] [0xc0000000 0x100000000] phys/cpu address PCIe bus address Legacy peripheral space space address space
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Changes since v2: - Test builds not broken with buildman - Add tests to all DM changes - Make code conditional with config option - Correct OF refcount - Add config changes - Address small changes as per reviews
Changes since v1: - Fix some issues in 'dm: Introduce xxx_get_dma_range()' - Fix some typos in commit messages - Change DTB file name for RPi400 - Address Matthias' comments
Nicolas Saenz Julienne (12): rpi: Add identifier for the new RPi400 rpi: Add identifier for the new CM4 pci: pcie-brcmstb: Fix inbound window configurations dm: Introduce xxx_get_dma_range() dm: test: Add test case for dev_get_dma_ranges() dm: Introduce DMA constraints into the core device model dm: test: Add test case for dev->dma_offset dm: Introduce dev_phys_to_bus()/dev_bus_to_phys() dm: test: Add test case for dev_phys_to_bus()/dev_bus_to_phys() xhci: translate virtual addresses into the bus's address space mmc: Introduce mmc_phys_to_bus()/mmc_bus_to_phys() configs: rpi4: Enable DM_DMA across all RPi4 configurations
arch/sandbox/dts/test.dts | 21 ++++++++ board/raspberrypi/rpi/rpi.c | 10 ++++ common/fdt_support.c | 73 ++++++++++++++++++++++++++++ configs/rpi_4_32b_defconfig | 1 + configs/rpi_4_defconfig | 1 + configs/rpi_arm64_defconfig | 1 + configs/sandbox64_defconfig | 1 + configs/sandbox_defconfig | 1 + configs/sandbox_flattree_defconfig | 1 + configs/sandbox_spl_defconfig | 1 + drivers/core/Kconfig | 10 ++++ drivers/core/device.c | 35 ++++++++++++++ drivers/core/of_addr.c | 78 ++++++++++++++++++++++++++++++ drivers/core/ofnode.c | 9 ++++ drivers/core/read.c | 6 +++ drivers/mmc/sdhci.c | 7 +-- drivers/pci/pcie_brcmstb.c | 12 ++--- drivers/usb/host/xhci-mem.c | 45 +++++++++-------- drivers/usb/host/xhci-ring.c | 11 +++-- drivers/usb/host/xhci.c | 4 +- include/dm/device.h | 3 ++ include/dm/of_addr.h | 17 +++++++ include/dm/ofnode.h | 16 ++++++ include/dm/read.h | 21 ++++++++ include/fdt_support.h | 14 ++++++ include/mmc.h | 10 ++++ include/phys2bus.h | 16 ++++++ include/usb/xhci.h | 22 ++++++++- test/dm/Makefile | 2 + test/dm/core.c | 30 ++++++++++++ test/dm/phys2bus.c | 36 ++++++++++++++ test/dm/read.c | 49 +++++++++++++++++++ 32 files changed, 526 insertions(+), 38 deletions(-) create mode 100644 test/dm/phys2bus.c create mode 100644 test/dm/read.c