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MIPS: consolidate the swiotlb implementations

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Octeon and Loongson share exactly the same code, move it into a common
implementation, and use that implementation directly from get_arch_dma_ops.

Also provide the expected dma-direct.h helpers directly instead of
delegating to platform dma-coherence.h headers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19534/
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 13:08:36 +02:00 committed by Paul Burton
parent e799de3efb
commit f6d302e33d
No known key found for this signature in database
GPG Key ID: 3EA79FACB57500DD
8 changed files with 84 additions and 153 deletions
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61
arch/mips/cavium-octeon/dma-octeon.c
View File

@ -11,7 +11,6 @@
* Copyright (C) 2010 Cavium Networks, Inc.
*/
#include <linux/dma-direct.h>
#include <linux/scatterlist.h>
#include <linux/bootmem.h>
#include <linux/swiotlb.h>
#include <linux/types.h>
@ -169,49 +168,6 @@ void __init octeon_pci_dma_init(void)
}
#endif /* CONFIG_PCI */
static dma_addr_t octeon_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction,
unsigned long attrs)
{
dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size,
direction, attrs);
mb();
return daddr;
}
static int octeon_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction direction, unsigned long attrs)
{
int r = swiotlb_map_sg_attrs(dev, sg, nents, direction, attrs);
mb();
return r;
}
static void octeon_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
{
swiotlb_sync_single_for_device(dev, dma_handle, size, direction);
mb();
}
static void octeon_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nelems, enum dma_data_direction direction)
{
swiotlb_sync_sg_for_device(dev, sg, nelems, direction);
mb();
}
static void *octeon_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs);
mb();
return ret;
}
dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
{
#ifdef CONFIG_PCI
@ -230,21 +186,6 @@ phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr)
return daddr;
}
static const struct dma_map_ops octeon_swiotlb_ops = {
.alloc = octeon_dma_alloc_coherent,
.free = swiotlb_free,
.map_page = octeon_dma_map_page,
.unmap_page = swiotlb_unmap_page,
.map_sg = octeon_dma_map_sg,
.unmap_sg = swiotlb_unmap_sg_attrs,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = octeon_dma_sync_single_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = octeon_dma_sync_sg_for_device,
.mapping_error = swiotlb_dma_mapping_error,
.dma_supported = swiotlb_dma_supported
};
char *octeon_swiotlb;
void __init plat_swiotlb_setup(void)
@ -307,6 +248,4 @@ void __init plat_swiotlb_setup(void)
if (swiotlb_init_with_tbl(octeon_swiotlb, swiotlb_nslabs, 1) == -ENOMEM)
panic("Cannot allocate SWIOTLB buffer");
mips_dma_map_ops = &octeon_swiotlb_ops;
}

17
arch/mips/include/asm/dma-direct.h
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@ -1 +1,16 @@
#include <asm/dma-coherence.h>
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _MIPS_DMA_DIRECT_H
#define _MIPS_DMA_DIRECT_H 1
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return false;
return addr + size - 1 <= *dev->dma_mask;
}
dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr);
phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr);
#endif /* _MIPS_DMA_DIRECT_H */

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

@ -11,10 +11,15 @@
#endif
extern const struct dma_map_ops *mips_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
return &mips_swiotlb_ops;
#else
return mips_dma_map_ops;
#endif
}
#define arch_setup_dma_ops arch_setup_dma_ops

11
arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h
View File

@ -61,17 +61,6 @@ static inline void plat_post_dma_flush(struct device *dev)
{
}
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return false;
return addr + size - 1 <= *dev->dma_mask;
}
dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr);
phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr);
extern char *octeon_swiotlb;
#endif /* __ASM_MACH_CAVIUM_OCTEON_DMA_COHERENCE_H */

10
arch/mips/include/asm/mach-loongson64/dma-coherence.h
View File

@ -17,16 +17,6 @@
struct device;
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (!dev->dma_mask)
return false;
return addr + size - 1 <= *dev->dma_mask;
}
extern dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr);
extern phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr);
static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
size_t size)
{

71
arch/mips/loongson64/common/dma-swiotlb.c
View File

@ -1,60 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/dma-direct.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
#include <linux/swiotlb.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <boot_param.h>
#include <dma-coherence.h>
static void *loongson_dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs);
mb();
return ret;
}
static dma_addr_t loongson_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
unsigned long attrs)
{
dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size,
dir, attrs);
mb();
return daddr;
}
static int loongson_dma_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir,
unsigned long attrs)
{
int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, attrs);
mb();
return r;
}
static void loongson_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction dir)
{
swiotlb_sync_single_for_device(dev, dma_handle, size, dir);
mb();
}
static void loongson_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nents,
enum dma_data_direction dir)
{
swiotlb_sync_sg_for_device(dev, sg, nents, dir);
mb();
}
dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
{
@ -80,23 +27,7 @@ phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t daddr)
return daddr;
}
static const struct dma_map_ops loongson_dma_map_ops = {
.alloc = loongson_dma_alloc_coherent,
.free = swiotlb_free,
.map_page = loongson_dma_map_page,
.unmap_page = swiotlb_unmap_page,
.map_sg = loongson_dma_map_sg,
.unmap_sg = swiotlb_unmap_sg_attrs,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = loongson_dma_sync_single_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = loongson_dma_sync_sg_for_device,
.mapping_error = swiotlb_dma_mapping_error,
.dma_supported = swiotlb_dma_supported,
};
void __init plat_swiotlb_setup(void)
{
swiotlb_init(1);
mips_dma_map_ops = &loongson_dma_map_ops;
}

1
arch/mips/mm/Makefile
View File

@ -17,6 +17,7 @@ obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o
obj-$(CONFIG_64BIT) += pgtable-64.o
obj-$(CONFIG_HIGHMEM) += highmem.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_SWIOTLB) += dma-swiotlb.o
obj-$(CONFIG_CPU_R4K_CACHE_TLB) += c-r4k.o cex-gen.o tlb-r4k.o
obj-$(CONFIG_CPU_R3000) += c-r3k.o tlb-r3k.o

61
arch/mips/mm/dma-swiotlb.c Normal file
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@ -0,0 +1,61 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/dma-mapping.h>
#include <linux/swiotlb.h>
static void *mips_swiotlb_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
void *ret = swiotlb_alloc(dev, size, dma_handle, gfp, attrs);
mb();
return ret;
}
static dma_addr_t mips_swiotlb_map_page(struct device *dev,
struct page *page, unsigned long offset, size_t size,
enum dma_data_direction dir, unsigned long attrs)
{
dma_addr_t daddr = swiotlb_map_page(dev, page, offset, size,
dir, attrs);
mb();
return daddr;
}
static int mips_swiotlb_map_sg(struct device *dev, struct scatterlist *sg,
int nents, enum dma_data_direction dir, unsigned long attrs)
{
int r = swiotlb_map_sg_attrs(dev, sg, nents, dir, attrs);
mb();
return r;
}
static void mips_swiotlb_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)
{
swiotlb_sync_single_for_device(dev, dma_handle, size, dir);
mb();
}
static void mips_swiotlb_sync_sg_for_device(struct device *dev,
struct scatterlist *sg, int nents, enum dma_data_direction dir)
{
swiotlb_sync_sg_for_device(dev, sg, nents, dir);
mb();
}
const struct dma_map_ops mips_swiotlb_ops = {
.alloc = mips_swiotlb_alloc,
.free = swiotlb_free,
.map_page = mips_swiotlb_map_page,
.unmap_page = swiotlb_unmap_page,
.map_sg = mips_swiotlb_map_sg,
.unmap_sg = swiotlb_unmap_sg_attrs,
.sync_single_for_cpu = swiotlb_sync_single_for_cpu,
.sync_single_for_device = mips_swiotlb_sync_single_for_device,
.sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
.sync_sg_for_device = mips_swiotlb_sync_sg_for_device,
.mapping_error = swiotlb_dma_mapping_error,
.dma_supported = swiotlb_dma_supported,
};
EXPORT_SYMBOL(mips_swiotlb_ops);