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metag: convert to dma_map_ops 

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: James Hogan <james.hogan@imgtec.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 15:01:56 -08:00 committed by Linus Torvalds
parent 340f3039ac
commit 5348c1e9e0
3 changed files with 117 additions and 209 deletions
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1
arch/metag/Kconfig
View File

@ -29,6 +29,7 @@ config METAG
select OF
select OF_EARLY_FLATTREE
select SPARSE_IRQ
select HAVE_DMA_ATTRS
config STACKTRACE_SUPPORT
def_bool y

179
arch/metag/include/asm/dma-mapping.h
View File

@ -1,178 +1,14 @@
#ifndef _ASM_METAG_DMA_MAPPING_H
#define _ASM_METAG_DMA_MAPPING_H
#include <linux/mm.h>
extern struct dma_map_ops metag_dma_ops;
#include <asm/cache.h>
#include <asm/io.h>
#include <linux/scatterlist.h>
#include <asm/bug.h>
#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)
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag);
void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle);
void dma_sync_for_device(void *vaddr, size_t size, int dma_direction);
void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction);
int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size);
static inline dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
BUG_ON(!valid_dma_direction(direction));
WARN_ON(size == 0);
dma_sync_for_device(ptr, size, direction);
return virt_to_phys(ptr);
return &metag_dma_ops;
}
static inline void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(!valid_dma_direction(direction));
dma_sync_for_cpu(phys_to_virt(dma_addr), size, direction);
}
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);
dma_sync_for_device(sg_virt(sg), sg->length, direction);
}
return nents;
}
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(!valid_dma_direction(direction));
dma_sync_for_device((void *)(page_to_phys(page) + offset), size,
direction);
return page_to_phys(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(!valid_dma_direction(direction));
dma_sync_for_cpu(phys_to_virt(dma_address), size, direction);
}
static inline void
dma_unmap_sg(struct device *dev, struct scatterlist *sglist, int nhwentries,
enum dma_data_direction direction)
{
struct scatterlist *sg;
int i;
BUG_ON(!valid_dma_direction(direction));
WARN_ON(nhwentries == 0 || sglist[0].length == 0);
for_each_sg(sglist, sg, nhwentries, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
}
}
static inline void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
dma_sync_for_cpu(phys_to_virt(dma_handle), size, 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)
{
dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
}
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)
{
dma_sync_for_cpu(phys_to_virt(dma_handle)+offset, size,
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)
{
dma_sync_for_device(phys_to_virt(dma_handle)+offset, size,
direction);
}
static inline void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nelems,
enum dma_data_direction direction)
{
int i;
struct scatterlist *sg;
for_each_sg(sglist, sg, nelems, i)
dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
}
static inline void
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
int nelems, enum dma_data_direction direction)
{
int i;
struct scatterlist *sg;
for_each_sg(sglist, sg, nelems, i)
dma_sync_for_device(sg_virt(sg), sg->length, direction);
}
static inline int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
return 0;
}
#define dma_supported(dev, mask) (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;
}
#include <asm-generic/dma-mapping-common.h>
/*
* dma_alloc_noncoherent() returns non-cacheable memory, so there's no need to
@ -184,11 +20,4 @@ dma_cache_sync(struct device *dev, void *vaddr, size_t size,
{
}
/* drivers/base/dma-mapping.c */
extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t dma_addr,
size_t size);
#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
#endif

146
arch/metag/kernel/dma.c
View File

@ -171,8 +171,8 @@ out:
* Allocate DMA-coherent memory space and return both the kernel remapped
* virtual and bus address for that space.
*/
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp)
static void *metag_dma_alloc(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs)
{
struct page *page;
struct metag_vm_region *c;
@ -263,13 +263,12 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
no_page:
return NULL;
}
EXPORT_SYMBOL(dma_alloc_coherent);
/*
* free a page as defined by the above mapping.
*/
void dma_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle)
static void metag_dma_free(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle, struct dma_attrs *attrs)
{
struct metag_vm_region *c;
unsigned long flags, addr;
@ -329,16 +328,19 @@ no_area:
__func__, vaddr);
dump_stack();
}
EXPORT_SYMBOL(dma_free_coherent);
static int dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size)
static int metag_dma_mmap(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size,
struct dma_attrs *attrs)
{
int ret = -ENXIO;
unsigned long flags, user_size, kern_size;
struct metag_vm_region *c;
int ret = -ENXIO;
if (dma_get_attr(DMA_ATTR_WRITE_COMBINE, attrs))
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
else
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
user_size = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
@ -364,25 +366,6 @@ static int dma_mmap(struct device *dev, struct vm_area_struct *vma,
return ret;
}
int dma_mmap_coherent(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size)
{
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return dma_mmap(dev, vma, cpu_addr, dma_addr, size);
}
EXPORT_SYMBOL(dma_mmap_coherent);
int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
void *cpu_addr, dma_addr_t dma_addr, size_t size)
{
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
return dma_mmap(dev, vma, cpu_addr, dma_addr, size);
}
EXPORT_SYMBOL(dma_mmap_writecombine);
/*
* Initialise the consistent memory allocation.
*/
@ -423,7 +406,7 @@ early_initcall(dma_alloc_init);
/*
* make an area consistent to devices.
*/
void dma_sync_for_device(void *vaddr, size_t size, int dma_direction)
static void dma_sync_for_device(void *vaddr, size_t size, int dma_direction)
{
/*
* Ensure any writes get through the write combiner. This is necessary
@ -465,12 +448,11 @@ void dma_sync_for_device(void *vaddr, size_t size, int dma_direction)
wmb();
}
EXPORT_SYMBOL(dma_sync_for_device);
/*
* make an area consistent to the core.
*/
void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction)
static void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction)
{
/*
* Hardware L2 cache prefetch doesn't occur across 4K physical
@ -497,4 +479,100 @@ void dma_sync_for_cpu(void *vaddr, size_t size, int dma_direction)
rmb();
}
EXPORT_SYMBOL(dma_sync_for_cpu);
static dma_addr_t metag_dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction direction, struct dma_attrs *attrs)
{
dma_sync_for_device((void *)(page_to_phys(page) + offset), size,
direction);
return page_to_phys(page) + offset;
}
static void metag_dma_unmap_page(struct device *dev, dma_addr_t dma_address,
size_t size, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
dma_sync_for_cpu(phys_to_virt(dma_address), size, direction);
}
static int metag_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);
dma_sync_for_device(sg_virt(sg), sg->length, direction);
}
return nents;
}
static void metag_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
int nhwentries, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
struct scatterlist *sg;
int i;
for_each_sg(sglist, sg, nhwentries, i) {
BUG_ON(!sg_page(sg));
sg->dma_address = sg_phys(sg);
dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
}
}
static void metag_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
dma_sync_for_cpu(phys_to_virt(dma_handle), size, direction);
}
static void metag_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
{
dma_sync_for_device(phys_to_virt(dma_handle), size, direction);
}
static void metag_dma_sync_sg_for_cpu(struct device *dev,
struct scatterlist *sglist, int nelems,
enum dma_data_direction direction)
{
int i;
struct scatterlist *sg;
for_each_sg(sglist, sg, nelems, i)
dma_sync_for_cpu(sg_virt(sg), sg->length, direction);
}
static void metag_dma_sync_sg_for_device(struct device *dev,
struct scatterlist *sglist, int nelems,
enum dma_data_direction direction)
{
int i;
struct scatterlist *sg;
for_each_sg(sglist, sg, nelems, i)
dma_sync_for_device(sg_virt(sg), sg->length, direction);
}
struct dma_map_ops metag_dma_ops = {
.alloc = metag_dma_alloc,
.free = metag_dma_free,
.map_page = metag_dma_map_page,
.map_sg = metag_dma_map_sg,
.sync_single_for_device = metag_dma_sync_single_for_device,
.sync_single_for_cpu = metag_dma_sync_single_for_cpu,
.sync_sg_for_cpu = metag_dma_sync_sg_for_cpu,
.mmap = metag_dma_mmap,
};
EXPORT_SYMBOL(metag_dma_ops);