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 <[email protected]> --- arch/mips/Kconfig | 2 +- arch/mips/loongson64/Kconfig | 5 ----- arch/mips/loongson64/common/Makefile | 5 ----- arch/mips/loongson64/loongson-3/Makefile | 2 +- .../{common/dma-swiotlb.c => loongson-3/dma.c} | 16 ++++------------ 5 files changed, 6 insertions(+), 24 deletions(-) rename arch/mips/loongson64/{common/dma-swiotlb.c => loongson-3/dma.c} (68%) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index bc8893063609..aae92a7b6a9c 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -453,7 +453,6 @@ config MACH_LOONGSON32 config MACH_LOONGSON64 bool "Loongson-2/3 family of machines" - select ARCH_HAS_PHYS_TO_DMA select SYS_SUPPORTS_ZBOOT help This enables the support of Loongson-2/3 family of machines. @@ -1388,6 +1387,7 @@ choice config CPU_LOONGSON3 bool "Loongson 3 CPU" depends on SYS_HAS_CPU_LOONGSON3 + select ARCH_HAS_PHYS_TO_DMA select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig index dbd2a9f9f9a9..a785bf8da3f3 100644 --- a/arch/mips/loongson64/Kconfig +++ b/arch/mips/loongson64/Kconfig @@ -93,7 +93,6 @@ config LOONGSON_MACH3X select LOONGSON_MC146818 select ZONE_DMA32 select LEFI_FIRMWARE_INTERFACE - select PHYS48_TO_HT40 help Generic Loongson 3 family machines utilize the 3A/3B revision of Loongson processor and RS780/SBX00 chipset. @@ -132,10 +131,6 @@ config LOONGSON_UART_BASE default y depends on EARLY_PRINTK || SERIAL_8250 -config PHYS48_TO_HT40 - bool - default y if CPU_LOONGSON3 - config LOONGSON_MC146818 bool default n 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-$(CONFIG_SWIOTLB) += dma-swiotlb.o diff --git a/arch/mips/loongson64/loongson-3/Makefile b/arch/mips/loongson64/loongson-3/Makefile index 44bc1482158b..b5a0c2fa5446 100644 --- a/arch/mips/loongson64/loongson-3/Makefile +++ b/arch/mips/loongson64/loongson-3/Makefile @@ -1,7 +1,7 @@ # # Makefile for Loongson-3 family machines # -obj-y += irq.o cop2-ex.o platform.o acpi_init.o +obj-y += irq.o cop2-ex.o platform.o acpi_init.o dma.o obj-$(CONFIG_SMP) += smp.o diff --git a/arch/mips/loongson64/common/dma-swiotlb.c b/arch/mips/loongson64/loongson-3/dma.c similarity index 68% rename from arch/mips/loongson64/common/dma-swiotlb.c rename to arch/mips/loongson64/loongson-3/dma.c index a4f554bf1232..5e86635f71db 100644 --- a/arch/mips/loongson64/common/dma-swiotlb.c +++ b/arch/mips/loongson64/loongson-3/dma.c @@ -5,26 +5,18 @@ 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; + long nid = (paddr >> 44) & 0x3; + return ((nid << 44) ^ paddr) | (nid << 37); } 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; + long nid = (daddr >> 37) & 0x3; + return ((nid << 37) ^ daddr) | (nid << 44); } void __init plat_swiotlb_setup(void) -- 2.17.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
