This patchset expands the usefulness of the Broadcom Settop Box PCIe controller by building upon the PCIe driver used currently by the Raspbery Pi. Other forms of this patchset were submitted by me years ago and not accepted; the major sticking point was the code required for the DMA remapping needed for the PCIe driver to work [1]. There have been many changes to the DMA and OF subsystems since that time, making a cleaner and less intrusive patchset possible. This patchset implements a generalization of "dev->dma_pfn_offset", except that instead of a single scalar offset it provides for multiple offsets via a function which depends upon the "dma-ranges" property of the PCIe host controller. This is required for proper functionality of the BrcmSTB PCIe controller and possibly some other devices. [1] https://lore.kernel.org/linux-arm-kernel/1516058925-46522-5-git-send-email-jim2101024@xxxxxxxxx/ Jim Quinlan (15): PCI: brcmstb: PCIE_BRCMSTB depends on ARCH_BRCMSTB ahci_brcm: fix use of BCM7216 reset controller dt-bindings: PCI: Add bindings for more Brcmstb chips PCI: brcmstb: Add compatibily of other chips PCI: brcmstb: Add suspend and resume pm_ops PCI: brcmstb: Asserting PERST is different for 7278 PCI: brcmstb: Add control of rescal reset of: Include a dev param in of_dma_get_range() device core: Add ability to handle multiple dma offsets dma-direct: Invoke dma offset func if needed arm: dma-mapping: Invoke dma offset func if needed PCI: brcmstb: Set internal memory viewport sizes PCI: brcmstb: Accommodate MSI for older chips PCI: brcmstb: Set bus max burst side by chip type PCI: brcmstb: add compatilbe chips to match list .../bindings/pci/brcm,stb-pcie.yaml | 40 +- arch/arm/include/asm/dma-mapping.h | 17 +- drivers/ata/ahci_brcm.c | 14 +- drivers/of/address.c | 54 ++- drivers/of/device.c | 2 +- drivers/of/of_private.h | 8 +- drivers/pci/controller/Kconfig | 4 +- drivers/pci/controller/pcie-brcmstb.c | 403 +++++++++++++++--- include/linux/device.h | 9 +- include/linux/dma-direct.h | 16 + include/linux/dma-mapping.h | 44 ++ kernel/dma/Kconfig | 12 + 12 files changed, 542 insertions(+), 81 deletions(-) -- 2.17.1
