openrisc: provide dma_map_ops
This switches OpenRISC over to fully using the generic dma-mapping framework. This was almost already the case as the architecture's implementation was essentially a copy of the generic header. This also brings this architecture in line with the recent changes to dma_map_ops (adding attributes to ops->alloc). Signed-off-by: Jonas Bonn <jonas@southpole.se>
This commit is contained in:
Jonas Bonn
parent
b0e026f4dc
commit
7b903e6c02
@ -20,150 +20,71 @@
|
||||
/*
|
||||
* See Documentation/DMA-API-HOWTO.txt and
|
||||
* Documentation/DMA-API.txt for documentation.
|
||||
*
|
||||
* This file is written with the intention of eventually moving over
|
||||
* to largely using asm-generic/dma-mapping-common.h in its place.
|
||||
*/
|
||||
|
||||
#include <linux/dma-debug.h>
|
||||
#include <asm-generic/dma-coherent.h>
|
||||
#include <linux/kmemcheck.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
|
||||
#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
|
||||
|
||||
extern struct dma_map_ops or1k_dma_map_ops;
|
||||
|
||||
#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 *or1k_dma_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t flag);
|
||||
void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
|
||||
dma_addr_t dma_handle);
|
||||
dma_addr_t or1k_map_page(struct device *dev, struct page *page,
|
||||
unsigned long offset, size_t size,
|
||||
enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs);
|
||||
void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
|
||||
size_t size, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs);
|
||||
int or1k_map_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs);
|
||||
void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs);
|
||||
void or1k_sync_single_for_cpu(struct device *dev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
enum dma_data_direction dir);
|
||||
void or1k_sync_single_for_device(struct device *dev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
enum dma_data_direction dir);
|
||||
|
||||
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t flag)
|
||||
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
|
||||
{
|
||||
return &or1k_dma_map_ops;
|
||||
}
|
||||
|
||||
#include <asm-generic/dma-mapping-common.h>
|
||||
|
||||
#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
|
||||
|
||||
static inline void *dma_alloc_attrs(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t gfp,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
struct dma_map_ops *ops = get_dma_ops(dev);
|
||||
void *memory;
|
||||
|
||||
memory = or1k_dma_alloc_coherent(dev, size, dma_handle, flag);
|
||||
memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
|
||||
|
||||
debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
|
||||
|
||||
return memory;
|
||||
}
|
||||
|
||||
static inline void dma_free_coherent(struct device *dev, size_t size,
|
||||
void *cpu_addr, dma_addr_t dma_handle)
|
||||
#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
|
||||
|
||||
static inline void dma_free_attrs(struct device *dev, size_t size,
|
||||
void *cpu_addr, dma_addr_t dma_handle,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
struct dma_map_ops *ops = get_dma_ops(dev);
|
||||
|
||||
debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
|
||||
or1k_dma_free_coherent(dev, size, cpu_addr, dma_handle);
|
||||
|
||||
ops->free(dev, size, cpu_addr, dma_handle, attrs);
|
||||
}
|
||||
|
||||
static inline dma_addr_t dma_map_single(struct device *dev, void *ptr,
|
||||
size_t size,
|
||||
enum dma_data_direction dir)
|
||||
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t gfp)
|
||||
{
|
||||
dma_addr_t addr;
|
||||
struct dma_attrs attrs;
|
||||
|
||||
kmemcheck_mark_initialized(ptr, size);
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
addr = or1k_map_page(dev, virt_to_page(ptr),
|
||||
(unsigned long)ptr & ~PAGE_MASK, size,
|
||||
dir, NULL);
|
||||
debug_dma_map_page(dev, virt_to_page(ptr),
|
||||
(unsigned long)ptr & ~PAGE_MASK, size,
|
||||
dir, addr, true);
|
||||
return addr;
|
||||
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
|
||||
|
||||
return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
|
||||
}
|
||||
|
||||
static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
|
||||
size_t size,
|
||||
enum dma_data_direction dir)
|
||||
static inline void dma_free_noncoherent(struct device *dev, size_t size,
|
||||
void *cpu_addr, dma_addr_t dma_handle)
|
||||
{
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
or1k_unmap_page(dev, addr, size, dir, NULL);
|
||||
debug_dma_unmap_page(dev, addr, size, dir, true);
|
||||
}
|
||||
struct dma_attrs attrs;
|
||||
|
||||
static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir)
|
||||
{
|
||||
int i, ents;
|
||||
struct scatterlist *s;
|
||||
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
|
||||
|
||||
for_each_sg(sg, s, nents, i)
|
||||
kmemcheck_mark_initialized(sg_virt(s), s->length);
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
ents = or1k_map_sg(dev, sg, nents, dir, NULL);
|
||||
debug_dma_map_sg(dev, sg, nents, ents, dir);
|
||||
|
||||
return ents;
|
||||
}
|
||||
|
||||
static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir)
|
||||
{
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
debug_dma_unmap_sg(dev, sg, nents, dir);
|
||||
or1k_unmap_sg(dev, sg, nents, dir, NULL);
|
||||
}
|
||||
|
||||
static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
|
||||
size_t offset, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
dma_addr_t addr;
|
||||
|
||||
kmemcheck_mark_initialized(page_address(page) + offset, size);
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
addr = or1k_map_page(dev, page, offset, size, dir, NULL);
|
||||
debug_dma_map_page(dev, page, offset, size, dir, addr, false);
|
||||
|
||||
return addr;
|
||||
}
|
||||
|
||||
static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
|
||||
size_t size, enum dma_data_direction dir)
|
||||
{
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
or1k_unmap_page(dev, addr, size, dir, NULL);
|
||||
debug_dma_unmap_page(dev, addr, size, dir, true);
|
||||
}
|
||||
|
||||
static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
|
||||
size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
or1k_sync_single_for_cpu(dev, addr, size, dir);
|
||||
debug_dma_sync_single_for_cpu(dev, addr, size, dir);
|
||||
}
|
||||
|
||||
static inline void dma_sync_single_for_device(struct device *dev,
|
||||
dma_addr_t addr, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
BUG_ON(!valid_dma_direction(dir));
|
||||
or1k_sync_single_for_device(dev, addr, size, dir);
|
||||
debug_dma_sync_single_for_device(dev, addr, size, dir);
|
||||
dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
|
||||
}
|
||||
|
||||
static inline int dma_supported(struct device *dev, u64 dma_mask)
|
||||
|
||||
@ -21,13 +21,16 @@
|
||||
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/dma-debug.h>
|
||||
#include <linux/export.h>
|
||||
#include <linux/dma-attrs.h>
|
||||
|
||||
#include <asm/cpuinfo.h>
|
||||
#include <asm/spr_defs.h>
|
||||
#include <asm/tlbflush.h>
|
||||
|
||||
static int page_set_nocache(pte_t *pte, unsigned long addr,
|
||||
unsigned long next, struct mm_walk *walk)
|
||||
static int
|
||||
page_set_nocache(pte_t *pte, unsigned long addr,
|
||||
unsigned long next, struct mm_walk *walk)
|
||||
{
|
||||
unsigned long cl;
|
||||
|
||||
@ -46,8 +49,9 @@ static int page_set_nocache(pte_t *pte, unsigned long addr,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int page_clear_nocache(pte_t *pte, unsigned long addr,
|
||||
unsigned long next, struct mm_walk *walk)
|
||||
static int
|
||||
page_clear_nocache(pte_t *pte, unsigned long addr,
|
||||
unsigned long next, struct mm_walk *walk)
|
||||
{
|
||||
pte_val(*pte) &= ~_PAGE_CI;
|
||||
|
||||
@ -67,9 +71,19 @@ static int page_clear_nocache(pte_t *pte, unsigned long addr,
|
||||
* cache-inhibit bit on those pages, and makes sure that the pages are
|
||||
* flushed out of the cache before they are used.
|
||||
*
|
||||
* If the NON_CONSISTENT attribute is set, then this function just
|
||||
* returns "normal", cachable memory.
|
||||
*
|
||||
* There are additional flags WEAK_ORDERING and WRITE_COMBINE to take
|
||||
* into consideration here, too. All current known implementations of
|
||||
* the OR1K support only strongly ordered memory accesses, so that flag
|
||||
* is being ignored for now; uncached but write-combined memory is a
|
||||
* missing feature of the OR1K.
|
||||
*/
|
||||
void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t gfp)
|
||||
static void *
|
||||
or1k_dma_alloc(struct device *dev, size_t size,
|
||||
dma_addr_t *dma_handle, gfp_t gfp,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
unsigned long va;
|
||||
void *page;
|
||||
@ -87,20 +101,23 @@ void *or1k_dma_alloc_coherent(struct device *dev, size_t size,
|
||||
|
||||
va = (unsigned long)page;
|
||||
|
||||
/*
|
||||
* We need to iterate through the pages, clearing the dcache for
|
||||
* them and setting the cache-inhibit bit.
|
||||
*/
|
||||
if (walk_page_range(va, va + size, &walk)) {
|
||||
free_pages_exact(page, size);
|
||||
return NULL;
|
||||
if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
|
||||
/*
|
||||
* We need to iterate through the pages, clearing the dcache for
|
||||
* them and setting the cache-inhibit bit.
|
||||
*/
|
||||
if (walk_page_range(va, va + size, &walk)) {
|
||||
free_pages_exact(page, size);
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
return (void *)va;
|
||||
}
|
||||
|
||||
void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
|
||||
dma_addr_t dma_handle)
|
||||
static void
|
||||
or1k_dma_free(struct device *dev, size_t size, void *vaddr,
|
||||
dma_addr_t dma_handle, struct dma_attrs *attrs)
|
||||
{
|
||||
unsigned long va = (unsigned long)vaddr;
|
||||
struct mm_walk walk = {
|
||||
@ -108,16 +125,19 @@ void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
|
||||
.mm = &init_mm
|
||||
};
|
||||
|
||||
/* walk_page_range shouldn't be able to fail here */
|
||||
WARN_ON(walk_page_range(va, va + size, &walk));
|
||||
if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) {
|
||||
/* walk_page_range shouldn't be able to fail here */
|
||||
WARN_ON(walk_page_range(va, va + size, &walk));
|
||||
}
|
||||
|
||||
free_pages_exact(vaddr, size);
|
||||
}
|
||||
|
||||
dma_addr_t or1k_map_page(struct device *dev, struct page *page,
|
||||
unsigned long offset, size_t size,
|
||||
enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
static dma_addr_t
|
||||
or1k_map_page(struct device *dev, struct page *page,
|
||||
unsigned long offset, size_t size,
|
||||
enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
unsigned long cl;
|
||||
dma_addr_t addr = page_to_phys(page) + offset;
|
||||
@ -147,16 +167,18 @@ dma_addr_t or1k_map_page(struct device *dev, struct page *page,
|
||||
return addr;
|
||||
}
|
||||
|
||||
void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
|
||||
size_t size, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
static void
|
||||
or1k_unmap_page(struct device *dev, dma_addr_t dma_handle,
|
||||
size_t size, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
/* Nothing special to do here... */
|
||||
}
|
||||
|
||||
int or1k_map_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
static int
|
||||
or1k_map_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
struct scatterlist *s;
|
||||
int i;
|
||||
@ -169,9 +191,10 @@ int or1k_map_sg(struct device *dev, struct scatterlist *sg,
|
||||
return nents;
|
||||
}
|
||||
|
||||
void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
static void
|
||||
or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
|
||||
int nents, enum dma_data_direction dir,
|
||||
struct dma_attrs *attrs)
|
||||
{
|
||||
struct scatterlist *s;
|
||||
int i;
|
||||
@ -181,9 +204,10 @@ void or1k_unmap_sg(struct device *dev, struct scatterlist *sg,
|
||||
}
|
||||
}
|
||||
|
||||
void or1k_sync_single_for_cpu(struct device *dev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
static void
|
||||
or1k_sync_single_for_cpu(struct device *dev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
unsigned long cl;
|
||||
dma_addr_t addr = dma_handle;
|
||||
@ -193,9 +217,10 @@ void or1k_sync_single_for_cpu(struct device *dev,
|
||||
mtspr(SPR_DCBIR, cl);
|
||||
}
|
||||
|
||||
void or1k_sync_single_for_device(struct device *dev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
static void
|
||||
or1k_sync_single_for_device(struct device *dev,
|
||||
dma_addr_t dma_handle, size_t size,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
unsigned long cl;
|
||||
dma_addr_t addr = dma_handle;
|
||||
@ -205,6 +230,18 @@ void or1k_sync_single_for_device(struct device *dev,
|
||||
mtspr(SPR_DCBFR, cl);
|
||||
}
|
||||
|
||||
struct dma_map_ops or1k_dma_map_ops = {
|
||||
.alloc = or1k_dma_alloc,
|
||||
.free = or1k_dma_free,
|
||||
.map_page = or1k_map_page,
|
||||
.unmap_page = or1k_unmap_page,
|
||||
.map_sg = or1k_map_sg,
|
||||
.unmap_sg = or1k_unmap_sg,
|
||||
.sync_single_for_cpu = or1k_sync_single_for_cpu,
|
||||
.sync_single_for_device = or1k_sync_single_for_device,
|
||||
};
|
||||
EXPORT_SYMBOL(or1k_dma_map_ops);
|
||||
|
||||
/* Number of entries preallocated for DMA-API debugging */
|
||||
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user