![Christoph Hellwig](/assets/img/avatar_default.png)
Almost everyone implements dma_set_mask the same way, although some time that's hidden in ->set_dma_mask methods. This patch consolidates those into a common implementation that either calls ->set_dma_mask if present or otherwise uses the default implementation. Some architectures used to only call ->set_dma_mask after the initial checks, and those instance have been fixed to do the full work. h8300 implemented dma_set_mask bogusly as a no-ops and has been fixed. Unfortunately some architectures overload unrelated semantics like changing the dma_ops into it so we still need to allow for an architecture override for now. [jcmvbkbc@gmail.com: fix xtensa] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@arm.linux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Michal Simek <monstr@monstr.eu> Cc: Jonas Bonn <jonas@southpole.se> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
359 lines
10 KiB
C
359 lines
10 KiB
C
#ifndef _ASM_GENERIC_DMA_MAPPING_H
|
|
#define _ASM_GENERIC_DMA_MAPPING_H
|
|
|
|
#include <linux/kmemcheck.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/dma-debug.h>
|
|
#include <linux/dma-attrs.h>
|
|
#include <asm-generic/dma-coherent.h>
|
|
|
|
static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
|
|
size_t size,
|
|
enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
dma_addr_t addr;
|
|
|
|
kmemcheck_mark_initialized(ptr, size);
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
addr = ops->map_page(dev, virt_to_page(ptr),
|
|
(unsigned long)ptr & ~PAGE_MASK, size,
|
|
dir, attrs);
|
|
debug_dma_map_page(dev, virt_to_page(ptr),
|
|
(unsigned long)ptr & ~PAGE_MASK, size,
|
|
dir, addr, true);
|
|
return addr;
|
|
}
|
|
|
|
static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
|
|
size_t size,
|
|
enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->unmap_page)
|
|
ops->unmap_page(dev, addr, size, dir, attrs);
|
|
debug_dma_unmap_page(dev, addr, size, dir, true);
|
|
}
|
|
|
|
/*
|
|
* dma_maps_sg_attrs returns 0 on error and > 0 on success.
|
|
* It should never return a value < 0.
|
|
*/
|
|
static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
int i, ents;
|
|
struct scatterlist *s;
|
|
|
|
for_each_sg(sg, s, nents, i)
|
|
kmemcheck_mark_initialized(sg_virt(s), s->length);
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
ents = ops->map_sg(dev, sg, nents, dir, attrs);
|
|
BUG_ON(ents < 0);
|
|
debug_dma_map_sg(dev, sg, nents, ents, dir);
|
|
|
|
return ents;
|
|
}
|
|
|
|
static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
debug_dma_unmap_sg(dev, sg, nents, dir);
|
|
if (ops->unmap_sg)
|
|
ops->unmap_sg(dev, sg, nents, dir, attrs);
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
dma_addr_t addr;
|
|
|
|
kmemcheck_mark_initialized(page_address(page) + offset, size);
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
addr = ops->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)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->unmap_page)
|
|
ops->unmap_page(dev, addr, size, dir, NULL);
|
|
debug_dma_unmap_page(dev, addr, size, dir, false);
|
|
}
|
|
|
|
static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
|
|
size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_for_cpu)
|
|
ops->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)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_for_device)
|
|
ops->sync_single_for_device(dev, addr, size, dir);
|
|
debug_dma_sync_single_for_device(dev, addr, size, dir);
|
|
}
|
|
|
|
static inline void dma_sync_single_range_for_cpu(struct device *dev,
|
|
dma_addr_t addr,
|
|
unsigned long offset,
|
|
size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_for_cpu)
|
|
ops->sync_single_for_cpu(dev, addr + offset, size, dir);
|
|
debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
|
|
}
|
|
|
|
static inline void dma_sync_single_range_for_device(struct device *dev,
|
|
dma_addr_t addr,
|
|
unsigned long offset,
|
|
size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_single_for_device)
|
|
ops->sync_single_for_device(dev, addr + offset, size, dir);
|
|
debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_sg_for_cpu)
|
|
ops->sync_sg_for_cpu(dev, sg, nelems, dir);
|
|
debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
|
|
}
|
|
|
|
static inline void
|
|
dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops->sync_sg_for_device)
|
|
ops->sync_sg_for_device(dev, sg, nelems, dir);
|
|
debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
|
|
|
|
}
|
|
|
|
#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
|
|
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
|
|
#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
|
|
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
|
|
|
|
extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size);
|
|
|
|
void *dma_common_contiguous_remap(struct page *page, size_t size,
|
|
unsigned long vm_flags,
|
|
pgprot_t prot, const void *caller);
|
|
|
|
void *dma_common_pages_remap(struct page **pages, size_t size,
|
|
unsigned long vm_flags, pgprot_t prot,
|
|
const void *caller);
|
|
void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags);
|
|
|
|
/**
|
|
* dma_mmap_attrs - map a coherent DMA allocation into user space
|
|
* @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
|
|
* @vma: vm_area_struct describing requested user mapping
|
|
* @cpu_addr: kernel CPU-view address returned from dma_alloc_attrs
|
|
* @handle: device-view address returned from dma_alloc_attrs
|
|
* @size: size of memory originally requested in dma_alloc_attrs
|
|
* @attrs: attributes of mapping properties requested in dma_alloc_attrs
|
|
*
|
|
* Map a coherent DMA buffer previously allocated by dma_alloc_attrs
|
|
* into user space. The coherent DMA buffer must not be freed by the
|
|
* driver until the user space mapping has been released.
|
|
*/
|
|
static inline int
|
|
dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr,
|
|
dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
BUG_ON(!ops);
|
|
if (ops->mmap)
|
|
return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
|
|
return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
|
|
}
|
|
|
|
#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)
|
|
|
|
int
|
|
dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size);
|
|
|
|
static inline int
|
|
dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, void *cpu_addr,
|
|
dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
BUG_ON(!ops);
|
|
if (ops->get_sgtable)
|
|
return ops->get_sgtable(dev, sgt, cpu_addr, dma_addr, size,
|
|
attrs);
|
|
return dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
|
|
}
|
|
|
|
#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)
|
|
|
|
#ifndef arch_dma_alloc_attrs
|
|
#define arch_dma_alloc_attrs(dev, flag) (true)
|
|
#endif
|
|
|
|
static inline void *dma_alloc_attrs(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flag,
|
|
struct dma_attrs *attrs)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
void *cpu_addr;
|
|
|
|
BUG_ON(!ops);
|
|
|
|
if (dma_alloc_from_coherent(dev, size, dma_handle, &cpu_addr))
|
|
return cpu_addr;
|
|
|
|
if (!arch_dma_alloc_attrs(&dev, &flag))
|
|
return NULL;
|
|
if (!ops->alloc)
|
|
return NULL;
|
|
|
|
cpu_addr = ops->alloc(dev, size, dma_handle, flag, attrs);
|
|
debug_dma_alloc_coherent(dev, size, *dma_handle, cpu_addr);
|
|
return cpu_addr;
|
|
}
|
|
|
|
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);
|
|
|
|
BUG_ON(!ops);
|
|
WARN_ON(irqs_disabled());
|
|
|
|
if (dma_release_from_coherent(dev, get_order(size), cpu_addr))
|
|
return;
|
|
|
|
if (!ops->free)
|
|
return;
|
|
|
|
debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
|
|
ops->free(dev, size, cpu_addr, dma_handle, attrs);
|
|
}
|
|
|
|
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flag)
|
|
{
|
|
return dma_alloc_attrs(dev, size, dma_handle, flag, NULL);
|
|
}
|
|
|
|
static inline void dma_free_coherent(struct device *dev, size_t size,
|
|
void *cpu_addr, dma_addr_t dma_handle)
|
|
{
|
|
return dma_free_attrs(dev, size, cpu_addr, dma_handle, NULL);
|
|
}
|
|
|
|
static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp)
|
|
{
|
|
DEFINE_DMA_ATTRS(attrs);
|
|
|
|
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
|
|
return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs);
|
|
}
|
|
|
|
static inline void dma_free_noncoherent(struct device *dev, size_t size,
|
|
void *cpu_addr, dma_addr_t dma_handle)
|
|
{
|
|
DEFINE_DMA_ATTRS(attrs);
|
|
|
|
dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs);
|
|
dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs);
|
|
}
|
|
|
|
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
|
{
|
|
debug_dma_mapping_error(dev, dma_addr);
|
|
|
|
if (get_dma_ops(dev)->mapping_error)
|
|
return get_dma_ops(dev)->mapping_error(dev, dma_addr);
|
|
|
|
#ifdef DMA_ERROR_CODE
|
|
return dma_addr == DMA_ERROR_CODE;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
#ifndef HAVE_ARCH_DMA_SUPPORTED
|
|
static inline int dma_supported(struct device *dev, u64 mask)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
if (!ops)
|
|
return 0;
|
|
if (!ops->dma_supported)
|
|
return 1;
|
|
return ops->dma_supported(dev, mask);
|
|
}
|
|
#endif
|
|
|
|
#ifndef HAVE_ARCH_DMA_SET_MASK
|
|
static inline int dma_set_mask(struct device *dev, u64 mask)
|
|
{
|
|
struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
if (ops->set_dma_mask)
|
|
return ops->set_dma_mask(dev, mask);
|
|
|
|
if (!dev->dma_mask || !dma_supported(dev, mask))
|
|
return -EIO;
|
|
*dev->dma_mask = mask;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif
|