diff options
| author | Jianmin Lv <lvjianmin@loongson.cn> | 2022-09-11 12:06:35 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-09-24 19:39:21 +0300 |
| commit | c78c43fe7d42524c8f364aaf95ef3652e7f1186b (patch) | |
| tree | a9a13210c39fb1ddfd404433ea3f1f9b6967073a /arch/loongarch/Kconfig | |
| parent | bf2ee8d0c385f883a00473768b67faf2189b2410 (diff) | |
| download | linux-c78c43fe7d42524c8f364aaf95ef3652e7f1186b.tar.xz | |
LoongArch: Use acpi_arch_dma_setup() and remove ARCH_HAS_PHYS_TO_DMA
Use _DMA defined in ACPI spec for translation between
DMA address and CPU address, and implement acpi_arch_dma_setup
for initializing dev->dma_range_map, where acpi_dma_get_range
is called for parsing _DMA.
e.g.
If we have two dma ranges:
cpu address dma address size offset
0x200080000000 0x2080000000 0x400000000 0x1fe000000000
0x400080000000 0x4080000000 0x400000000 0x3fc000000000
_DMA for pci devices should be declared in host bridge as
flowing:
Name (_DMA, ResourceTemplate() {
QWordMemory (ResourceProducer,
PosDecode,
MinFixed,
MaxFixed,
NonCacheable,
ReadWrite,
0x0,
0x4080000000,
0x447fffffff,
0x3fc000000000,
0x400000000,
,
,
)
QWordMemory (ResourceProducer,
PosDecode,
MinFixed,
MaxFixed,
NonCacheable,
ReadWrite,
0x0,
0x2080000000,
0x247fffffff,
0x1fe000000000,
0x400000000,
,
,
)
})
Acked-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/loongarch/Kconfig')
| -rw-r--r-- | arch/loongarch/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index c7dd6ad779af..551dd99e98b8 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -10,7 +10,6 @@ config LOONGARCH select ARCH_ENABLE_MEMORY_HOTPLUG select ARCH_ENABLE_MEMORY_HOTREMOVE select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI - select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST select ARCH_INLINE_READ_LOCK if !PREEMPTION |