diff options
| author | Jianmin Lv <lvjianmin@loongson.cn> | 2022-09-11 17:06:35 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-09-24 18:39:21 +0200 |
| commit | c78c43fe7d42524c8f364aaf95ef3652e7f1186b (patch) | |
| tree | a9a13210c39fb1ddfd404433ea3f1f9b6967073a /include/linux/acpi.h | |
| parent | bf2ee8d0c385f883a00473768b67faf2189b2410 (diff) | |
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 'include/linux/acpi.h')
| -rw-r--r-- | include/linux/acpi.h | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/acpi.h b/include/linux/acpi.h index bb41623dab77..a71d73a0d43e 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -279,14 +279,17 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) { } void acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa); +#if defined(CONFIG_ARM64) || defined(CONFIG_LOONGARCH) +void acpi_arch_dma_setup(struct device *dev); +#else +static inline void acpi_arch_dma_setup(struct device *dev) { } +#endif + #ifdef CONFIG_ARM64 void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa); -void acpi_arch_dma_setup(struct device *dev); #else static inline void acpi_numa_gicc_affinity_init(struct acpi_srat_gicc_affinity *pa) { } -static inline void -acpi_arch_dma_setup(struct device *dev) { } #endif int acpi_numa_memory_affinity_init (struct acpi_srat_mem_affinity *ma); |