diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-06-15 14:08:44 +0300 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-06-24 19:26:04 +0300 |
| commit | 54aed4dd35269ef15eb1569517f34fb3961d4d34 (patch) | |
| tree | f3ac11d100a9c06b3a311aab05836e9904a0f04e /arch/mips/include/asm | |
| parent | dffbfde7582b03f57aed15055dbf8af433c5b1ae (diff) | |
| download | linux-54aed4dd35269ef15eb1569517f34fb3961d4d34.tar.xz | |
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 <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19542/
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/include/asm')
| -rw-r--r-- | arch/mips/include/asm/mach-ip27/dma-coherence.h | 70 |
1 files changed, 0 insertions, 70 deletions
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 <ralf@linux-mips.org> - * - */ -#ifndef __ASM_MACH_IP27_DMA_COHERENCE_H -#define __ASM_MACH_IP27_DMA_COHERENCE_H - -#include <asm/pci/bridge.h> - -#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 */ |