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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-02-10 11:35:36 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-02-10 11:35:36 -0800 |
| commit | 4ba24fef3eb3b142197135223b90ced2f319cd53 (patch) | |
| tree | a20c125b27740ec7b4c761b11d801108e1b316b2 /arch/mips/loongson/common/dma-swiotlb.c | |
| parent | 47c1ffb2b6b630894e9a16442611c056ab21c057 (diff) | |
| parent | 98a4a59ee31a12105a2b84f5b8b515ac2cb208ef (diff) | |
Merge branch 'next' into for-linus
Prepare first round of input updates for 3.20.
Diffstat (limited to 'arch/mips/loongson/common/dma-swiotlb.c')
| -rw-r--r-- | arch/mips/loongson/common/dma-swiotlb.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/mips/loongson/common/dma-swiotlb.c b/arch/mips/loongson/common/dma-swiotlb.c index c2be01f91575..2c6b989c1bc4 100644 --- a/arch/mips/loongson/common/dma-swiotlb.c +++ b/arch/mips/loongson/common/dma-swiotlb.c @@ -105,11 +105,25 @@ static int loongson_dma_set_mask(struct device *dev, u64 mask) dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) { + long nid; +#ifdef CONFIG_PHYS48_TO_HT40 + /* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from + * Loongson-3's 48bit address space and embed it into 40bit */ + nid = (paddr >> 44) & 0x3; + paddr = ((nid << 44) ^ paddr) | (nid << 37); +#endif return paddr; } phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) { + long nid; +#ifdef CONFIG_PHYS48_TO_HT40 + /* We extract 2bit node id (bit 44~47, only bit 44~45 used now) from + * Loongson-3's 48bit address space and embed it into 40bit */ + nid = (daddr >> 37) & 0x3; + daddr = ((nid << 37) ^ daddr) | (nid << 44); +#endif return daddr; } |