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mn10300: convert to dma_map_ops 

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2016-01-20 15:01:50 -08:00 committed by Linus Torvalds
parent 79387179e2
commit f151341ca0
3 changed files with 67 additions and 163 deletions
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2
arch/mn10300/Kconfig
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@ -14,6 +14,8 @@ config MN10300
select OLD_SIGSUSPEND3 select OLD_SIGSUSPEND3
select OLD_SIGACTION select OLD_SIGACTION
select HAVE_DEBUG_STACKOVERFLOW select HAVE_DEBUG_STACKOVERFLOW
select ARCH_NO_COHERENT_DMA_MMAP
select HAVE_DMA_ATTRS
config AM33_2 config AM33_2
def_bool n def_bool n

161
arch/mn10300/include/asm/dma-mapping.h
View File

@ -11,154 +11,14 @@
#ifndef _ASM_DMA_MAPPING_H #ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H #define _ASM_DMA_MAPPING_H
#include <linux/mm.h>
#include <linux/scatterlist.h>
#include <asm/cache.h> #include <asm/cache.h>
#include <asm/io.h> #include <asm/io.h>
/* extern struct dma_map_ops mn10300_dma_ops;
* See Documentation/DMA-API.txt for the description of how the
* following DMA API should work.
*/
extern void *dma_alloc_coherent(struct device *dev, size_t size, static inline struct dma_map_ops *get_dma_ops(struct device *dev)
dma_addr_t *dma_handle, int flag);
extern void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent((d), (s), (h), (f))
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent((d), (s), (v), (h))
static inline
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{ {
BUG_ON(direction == DMA_NONE); return &mn10300_dma_ops;
mn10300_dcache_flush_inv();
return virt_to_bus(ptr);
}
static inline
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
static inline
int dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
enum dma_data_direction direction)
{
struct scatterlist *sg;
int i;
BUG_ON(!valid_dma_direction(direction));
WARN_ON(nents == 0 || sglist[0].length == 0);
for_each_sg(sglist, sg, nents, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
}
mn10300_dcache_flush_inv();
return nents;
}
static inline
void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
BUG_ON(!valid_dma_direction(direction));
}
static inline
dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
return page_to_bus(page) + offset;
}
static inline
void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
static inline
void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
}
static inline
void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
mn10300_dcache_flush_inv();
}
static inline
void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
}
static inline void
dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
mn10300_dcache_flush_inv();
}
static inline
void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction direction)
{
}
static inline
void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction direction)
{
mn10300_dcache_flush_inv();
}
static inline
int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
static inline
int 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 < 0x00ffffff)
return 0;
return 1;
}
static inline
int dma_set_mask(struct device *dev, u64 mask)
{
if (!dev->dma_mask || !dma_supported(dev, mask))
return -EIO;
*dev->dma_mask = mask;
return 0;
} }
static inline static inline
@ -168,19 +28,6 @@ void dma_cache_sync(void *vaddr, size_t size,
mn10300_dcache_flush_inv(); mn10300_dcache_flush_inv();
} }
/* Not supported for now */ #include <asm-generic/dma-mapping-common.h>
static inline int dma_mmap_coherent(struct device *dev,
struct vm_area_struct *vma, void *cpu_addr,
dma_addr_t dma_addr, size_t size)
{
return -EINVAL;
}
static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t dma_addr,
size_t size)
{
return -EINVAL;
}
#endif #endif

67
arch/mn10300/mm/dma-alloc.c
View File

@ -20,8 +20,8 @@
static unsigned long pci_sram_allocated = 0xbc000000; static unsigned long pci_sram_allocated = 0xbc000000;
void *dma_alloc_coherent(struct device *dev, size_t size, static void *mn10300_dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, int gfp) dma_addr_t *dma_handle, gfp_t gfp, struct dma_attrs *attrs)
{ {
unsigned long addr; unsigned long addr;
void *ret; void *ret;
@ -61,10 +61,9 @@ done:
printk("dma_alloc_coherent() = %p [%x]\n", ret, *dma_handle); printk("dma_alloc_coherent() = %p [%x]\n", ret, *dma_handle);
return ret; return ret;
} }
EXPORT_SYMBOL(dma_alloc_coherent);
void dma_free_coherent(struct device *dev, size_t size, void *vaddr, static void mn10300_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle) dma_addr_t dma_handle, struct dma_attrs *attrs)
{ {
unsigned long addr = (unsigned long) vaddr & ~0x20000000; unsigned long addr = (unsigned long) vaddr & ~0x20000000;
@ -73,4 +72,60 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
free_pages(addr, get_order(size)); free_pages(addr, get_order(size));
} }
EXPORT_SYMBOL(dma_free_coherent);
static int mn10300_dma_map_sg(struct device *dev, struct scatterlist *sglist,
int nents, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
struct scatterlist *sg;
int i;
for_each_sg(sglist, sg, nents, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
}
mn10300_dcache_flush_inv();
return nents;
}
static dma_addr_t mn10300_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction, struct dma_attrs *attrs)
{
return page_to_bus(page) + offset;
}
static void mn10300_dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
mn10300_dcache_flush_inv();
}
static void mn10300_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
int nelems, enum dma_data_direction direction)
{
mn10300_dcache_flush_inv();
}
static int mn10300_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 < 0x00ffffff)
return 0;
return 1;
}
struct dma_map_ops mn10300_dma_ops = {
.alloc = mn10300_dma_alloc,
.free = mn10300_dma_free,
.map_page = mn10300_dma_map_page,
.map_sg = mn10300_dma_map_sg,
.sync_single_for_device = mn10300_dma_sync_single_for_device,
.sync_sg_for_device = mn10300_dma_sync_sg_for_device,
};