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| author | Nicolas Saenz Julienne <nsaenzjulienne@suse.de> | 2019-11-07 16:06:45 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-11-11 10:52:19 +0100 |
| commit | e380a0394c36a3a878c858418d5dd7f5f195b6fc (patch) | |
| tree | 03b188c0d608d1c8c78cd7f0a4d867351f9f8cb0 /arch/x86/Kconfig | |
| parent | b12d66278dd627cbe1ea7c000aa4715aaf8830c8 (diff) | |
| download | linux-e380a0394c36a3a878c858418d5dd7f5f195b6fc.tar.bz2 | |
x86/PCI: sta2x11: use default DMA address translation
The devices found behind this PCIe chip have unusual DMA mapping
constraints as there is an AMBA interconnect placed in between them and
the different PCI endpoints. The offset between physical memory
addresses and AMBA's view is provided by reading a PCI config register,
which is saved and used whenever DMA mapping is needed.
It turns out that this DMA setup can be represented by properly setting
'dma_pfn_offset', 'dma_bus_mask' and 'dma_mask' during the PCI device
enable fixup. And ultimately allows us to get rid of this device's
custom DMA functions.
Aside from the code deletion and DMA setup, sta2x11_pdev_to_mapping() is
moved to avoid warnings whenever CONFIG_PM is not enabled.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index d6e1faa28c58..35dd8f147f99 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -708,7 +708,6 @@ config X86_SUPPORTS_MEMORY_FAILURE config STA2X11 bool "STA2X11 Companion Chip Support" depends on X86_32_NON_STANDARD && PCI - select ARCH_HAS_PHYS_TO_DMA select SWIOTLB select MFD_STA2X11 select GPIOLIB |