linux

iv/linux

History

Jianmin Lv c78c43fe7d 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>

2022-09-24 18:39:21 +02:00

alpha

provide arch_test_bit_acquire for architectures that define test_bit

2022-08-27 09:49:54 -07:00

arc

Kbuild updates for v5.20

2022-08-10 10:40:41 -07:00

arm

asm-generic: SOFTIRQ_ON_OWN_STACK rework

2022-09-09 07:23:29 -04:00

arm64

arm64 fixes for -rc5