From e905086e6b2fc9d7e2764cf04622743ca86558f1 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 20 Jun 2018 09:11:15 +0200 Subject: [PATCH] MIPS: loongson64: use generic dma noncoherent ops Provide phys_to_dma/dma_to_phys helpers, everything else is generic. Signed-off-by: Christoph Hellwig Patchwork: https://patchwork.linux-mips.org/patch/19545/ Signed-off-by: Paul Burton Cc: Florian Fainelli Cc: David Daney Cc: Kevin Cernekee Cc: Jiaxun Yang Cc: Tom Bogendoerfer Cc: Huacai Chen Cc: iommu@lists.linux-foundation.org Cc: linux-mips@linux-mips.org --- arch/mips/Kconfig | 1 + .../asm/mach-loongson64/dma-coherence.h | 69 ------------------- arch/mips/loongson64/Kconfig | 2 - arch/mips/loongson64/common/Makefile | 1 + arch/mips/loongson64/common/dma.c | 18 +++++ 5 files changed, 20 insertions(+), 71 deletions(-) delete mode 100644 arch/mips/include/asm/mach-loongson64/dma-coherence.h create mode 100644 arch/mips/loongson64/common/dma.c diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 47592cc7fa54..aa438f0a0273 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1828,6 +1828,7 @@ config CPU_LOONGSON2 select CPU_SUPPORTS_64BIT_KERNEL select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES + select ARCH_HAS_PHYS_TO_DMA config CPU_LOONGSON1 bool diff --git a/arch/mips/include/asm/mach-loongson64/dma-coherence.h b/arch/mips/include/asm/mach-loongson64/dma-coherence.h deleted file mode 100644 index 651dd2eb3ee5..000000000000 --- a/arch/mips/include/asm/mach-loongson64/dma-coherence.h +++ /dev/null @@ -1,69 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2006, 07 Ralf Baechle - * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology - * Author: Fuxin Zhang, zhangfx@lemote.com - * - */ -#ifndef __ASM_MACH_LOONGSON64_DMA_COHERENCE_H -#define __ASM_MACH_LOONGSON64_DMA_COHERENCE_H - -#ifdef CONFIG_SWIOTLB -#include -#endif - -struct device; - -static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, - size_t size) -{ - return virt_to_phys(addr) | 0x80000000; -} - -static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, - struct page *page) -{ - return page_to_phys(page) | 0x80000000; -} - -static inline unsigned long plat_dma_addr_to_phys(struct device *dev, - dma_addr_t dma_addr) -{ -#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT) - return (dma_addr > 0x8fffffff) ? dma_addr : (dma_addr & 0x0fffffff); -#else - return dma_addr & 0x7fffffff; -#endif -} - -static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr, - size_t size, enum dma_data_direction direction) -{ -} - -static inline int plat_dma_supported(struct device *dev, u64 mask) -{ - /* - * we fall back to GFP_DMA when the mask isn't all 1s, - * so we can't guarantee allocations that must be - * within a tighter range than GFP_DMA.. - */ - if (mask < DMA_BIT_MASK(24)) - return 0; - - return 1; -} - -static inline int plat_device_is_coherent(struct device *dev) -{ - return 0; -} - -static inline void plat_post_dma_flush(struct device *dev) -{ -} - -#endif /* __ASM_MACH_LOONGSON64_DMA_COHERENCE_H */ diff --git a/arch/mips/loongson64/Kconfig b/arch/mips/loongson64/Kconfig index a785bf8da3f3..c865b4b9b775 100644 --- a/arch/mips/loongson64/Kconfig +++ b/arch/mips/loongson64/Kconfig @@ -13,7 +13,6 @@ config LEMOTE_FULOONG2E select CSRC_R4K select SYS_HAS_CPU_LOONGSON2E select DMA_NONCOHERENT - select MIPS_DMA_DEFAULT select BOOT_ELF32 select BOARD_SCACHE select HW_HAS_PCI @@ -45,7 +44,6 @@ config LEMOTE_MACH2F select CS5536 select CSRC_R4K if ! MIPS_EXTERNAL_TIMER select DMA_NONCOHERENT - select MIPS_DMA_DEFAULT select GENERIC_ISA_DMA_SUPPORT_BROKEN select HAVE_CLK select HW_HAS_PCI diff --git a/arch/mips/loongson64/common/Makefile b/arch/mips/loongson64/common/Makefile index 684624f61f5a..57ee03022941 100644 --- a/arch/mips/loongson64/common/Makefile +++ b/arch/mips/loongson64/common/Makefile @@ -6,6 +6,7 @@ obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \ bonito-irq.o mem.o machtype.o platform.o serial.o obj-$(CONFIG_PCI) += pci.o +obj-$(CONFIG_CPU_LOONGSON2) += dma.o # # Serial port support diff --git a/arch/mips/loongson64/common/dma.c b/arch/mips/loongson64/common/dma.c new file mode 100644 index 000000000000..48f04126bde2 --- /dev/null +++ b/arch/mips/loongson64/common/dma.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +#include + +dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + return paddr | 0x80000000; +} + +phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr) +{ +#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT) + if (dma_addr > 0x8fffffff) + return dma_addr; + return dma_addr & 0x0fffffff; +#else + return dma_addr & 0x7fffffff; +#endif +}