From 54aed4dd35269ef15eb1569517f34fb3961d4d34 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 15 Jun 2018 13:08:44 +0200 Subject: MIPS: IP27: use dma_direct_ops IP27 is coherent and has a reasonably direct mapping, just with a little per-bus offset added into the dma address. Signed-off-by: Christoph Hellwig Patchwork: https://patchwork.linux-mips.org/patch/19542/ 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 | 2 +- arch/mips/include/asm/mach-ip27/dma-coherence.h | 70 ------------------------- arch/mips/pci/pci-ip27.c | 14 +++++ 3 files changed, 15 insertions(+), 71 deletions(-) delete mode 100644 arch/mips/include/asm/mach-ip27/dma-coherence.h (limited to 'arch/mips') diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index c1307b83de3a..b5b68cfaec2b 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -683,11 +683,11 @@ config SGI_IP22 config SGI_IP27 bool "SGI IP27 (Origin200/2000)" + select ARCH_HAS_PHYS_TO_DMA select FW_ARC select FW_ARC64 select BOOT_ELF64 select DEFAULT_SGI_PARTITION - select MIPS_DMA_DEFAULT select SYS_HAS_EARLY_PRINTK select HW_HAS_PCI select NR_CPUS_DEFAULT_64 diff --git a/arch/mips/include/asm/mach-ip27/dma-coherence.h b/arch/mips/include/asm/mach-ip27/dma-coherence.h deleted file mode 100644 index 04d862020ac9..000000000000 --- a/arch/mips/include/asm/mach-ip27/dma-coherence.h +++ /dev/null @@ -1,70 +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 Ralf Baechle - * - */ -#ifndef __ASM_MACH_IP27_DMA_COHERENCE_H -#define __ASM_MACH_IP27_DMA_COHERENCE_H - -#include - -#define pdev_to_baddr(pdev, addr) \ - (BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr)) -#define dev_to_baddr(dev, addr) \ - pdev_to_baddr(to_pci_dev(dev), (addr)) - -struct device; - -static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, - size_t size) -{ - dma_addr_t pa = dev_to_baddr(dev, virt_to_phys(addr)); - - return pa; -} - -static inline dma_addr_t plat_map_dma_mem_page(struct device *dev, - struct page *page) -{ - dma_addr_t pa = dev_to_baddr(dev, page_to_phys(page)); - - return pa; -} - -static inline unsigned long plat_dma_addr_to_phys(struct device *dev, - dma_addr_t dma_addr) -{ - return dma_addr & ~(0xffUL << 56); -} - -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 void plat_post_dma_flush(struct device *dev) -{ -} - -static inline int plat_device_is_coherent(struct device *dev) -{ - return 1; /* IP27 non-coherent mode is unsupported */ -} - -#endif /* __ASM_MACH_IP27_DMA_COHERENCE_H */ diff --git a/arch/mips/pci/pci-ip27.c b/arch/mips/pci/pci-ip27.c index 0f09eafa5e3a..65b48d41a229 100644 --- a/arch/mips/pci/pci-ip27.c +++ b/arch/mips/pci/pci-ip27.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -182,6 +183,19 @@ int pcibios_plat_dev_init(struct pci_dev *dev) return 0; } +dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) +{ + struct pci_dev *pdev = to_pci_dev(dev); + struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus); + + return bc->baddr + paddr; +} + +phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr) +{ + return dma_addr & ~(0xffUL << 56); +} + /* * Device might live on a subordinate PCI bus. XXX Walk up the chain of buses * to find the slot number in sense of the bridge device register. -- cgit v1.2.3-55-g7522