xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

MIPS: jazz: split dma mapping operations from dma-default

Browse Source 
Jazz actually has a very basic IOMMU, so split the ops into a separate
implementation from the generic default support (which is about to go
away anyway).

Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19548/
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
This commit is contained in:
Christoph Hellwig
2018-06-15 13:08:50 +02:00
committed by Paul Burton
parent d1f2564a56
commit c5e2bbb45d
4 changed files with 144 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
arch/mips/include/asm/dma-mapping.h
View File

@@ -10,12 +10,15 @@
#include <dma-coherence.h>
#endif
extern const struct dma_map_ops jazz_dma_ops;
extern const struct dma_map_ops mips_default_dma_map_ops;
extern const struct dma_map_ops mips_swiotlb_ops;
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
#ifdef CONFIG_SWIOTLB
#if defined(CONFIG_MACH_JAZZ)
return &jazz_dma_ops;
#elif defined(CONFIG_SWIOTLB)
return &mips_swiotlb_ops;
#elif defined(CONFIG_MIPS_DMA_DEFAULT)
return &mips_default_dma_map_ops;

60
arch/mips/include/asm/mach-jazz/dma-coherence.h
View File

@@ -1,60 +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_JAZZ_DMA_COHERENCE_H
#define __ASM_MACH_JAZZ_DMA_COHERENCE_H
#include <asm/jazzdma.h>
struct device;
static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
{
return vdma_alloc(virt_to_phys(addr), size);
}
static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
struct page *page)
{
return vdma_alloc(page_to_phys(page), PAGE_SIZE);
}
static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
dma_addr_t dma_addr)
{
return vdma_log2phys(dma_addr);
}
static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
size_t size, enum dma_data_direction direction)
{
vdma_free(dma_addr);
}
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 0;
}
#endif /* __ASM_MACH_JAZZ_DMA_COHERENCE_H */