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| author | Christoph Hellwig <hch@lst.de> | 2018-06-15 13:08:41 +0200 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-06-24 09:26:04 -0700 |
| commit | d3bc81befcf2634c64f1b2a95311d54ccfa1e06c (patch) | |
| tree | 4684ab327e8a14e565baf20cfc9f07b5a3b90c18 /arch/mips/loongson64/common | |
| parent | a330a9c59b45e53dee7985237340f6480a1ea08f (diff) | |
| download | talos-obmc-linux-d3bc81befcf2634c64f1b2a95311d54ccfa1e06c.tar.gz talos-obmc-linux-d3bc81befcf2634c64f1b2a95311d54ccfa1e06c.zip | |
MIPS: loongson: untangle dma implementations
Only loongson-3 is DMA coherent and uses swiotlb. So move the dma
address translations stubs directly to the loongson-3 code, and remove
a few Kconfig indirections.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19539/
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org
Diffstat (limited to 'arch/mips/loongson64/common')
| -rw-r--r-- | arch/mips/loongson64/common/Makefile | 5 | ||||
| -rw-r--r-- | arch/mips/loongson64/common/dma-swiotlb.c | 33 |
2 files changed, 0 insertions, 38 deletions
diff --git a/arch/mips/loongson64/common/Makefile b/arch/mips/loongson64/common/Makefile index 8235ac7eac95..684624f61f5a 100644 --- a/arch/mips/loongson64/common/Makefile +++ b/arch/mips/loongson64/common/Makefile @@ -25,8 +25,3 @@ obj-$(CONFIG_CS5536) += cs5536/ # obj-$(CONFIG_SUSPEND) += pm.o - -# -# Big Memory (SWIOTLB) Support -# -obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o diff --git a/arch/mips/loongson64/common/dma-swiotlb.c b/arch/mips/loongson64/common/dma-swiotlb.c deleted file mode 100644 index a4f554bf1232..000000000000 --- a/arch/mips/loongson64/common/dma-swiotlb.c +++ /dev/null @@ -1,33 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#include <linux/dma-direct.h> -#include <linux/init.h> -#include <linux/swiotlb.h> - -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; -} - -void __init plat_swiotlb_setup(void) -{ - swiotlb_init(1); -} |
