827 lines
26 KiB
C
827 lines
26 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_DMA_MAPPING_H
|
|
#define _LINUX_DMA_MAPPING_H
|
|
|
|
#include <linux/sizes.h>
|
|
#include <linux/string.h>
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/dma-debug.h>
|
|
#include <linux/dma-direction.h>
|
|
#include <linux/scatterlist.h>
|
|
#include <linux/bug.h>
|
|
#include <linux/mem_encrypt.h>
|
|
|
|
/**
|
|
* List of possible attributes associated with a DMA mapping. The semantics
|
|
* of each attribute should be defined in Documentation/DMA-attributes.txt.
|
|
*
|
|
* DMA_ATTR_WRITE_BARRIER: DMA to a memory region with this attribute
|
|
* forces all pending DMA writes to complete.
|
|
*/
|
|
#define DMA_ATTR_WRITE_BARRIER (1UL << 0)
|
|
/*
|
|
* DMA_ATTR_WEAK_ORDERING: Specifies that reads and writes to the mapping
|
|
* may be weakly ordered, that is that reads and writes may pass each other.
|
|
*/
|
|
#define DMA_ATTR_WEAK_ORDERING (1UL << 1)
|
|
/*
|
|
* DMA_ATTR_WRITE_COMBINE: Specifies that writes to the mapping may be
|
|
* buffered to improve performance.
|
|
*/
|
|
#define DMA_ATTR_WRITE_COMBINE (1UL << 2)
|
|
/*
|
|
* DMA_ATTR_NON_CONSISTENT: Lets the platform to choose to return either
|
|
* consistent or non-consistent memory as it sees fit.
|
|
*/
|
|
#define DMA_ATTR_NON_CONSISTENT (1UL << 3)
|
|
/*
|
|
* DMA_ATTR_NO_KERNEL_MAPPING: Lets the platform to avoid creating a kernel
|
|
* virtual mapping for the allocated buffer.
|
|
*/
|
|
#define DMA_ATTR_NO_KERNEL_MAPPING (1UL << 4)
|
|
/*
|
|
* DMA_ATTR_SKIP_CPU_SYNC: Allows platform code to skip synchronization of
|
|
* the CPU cache for the given buffer assuming that it has been already
|
|
* transferred to 'device' domain.
|
|
*/
|
|
#define DMA_ATTR_SKIP_CPU_SYNC (1UL << 5)
|
|
/*
|
|
* DMA_ATTR_FORCE_CONTIGUOUS: Forces contiguous allocation of the buffer
|
|
* in physical memory.
|
|
*/
|
|
#define DMA_ATTR_FORCE_CONTIGUOUS (1UL << 6)
|
|
/*
|
|
* DMA_ATTR_ALLOC_SINGLE_PAGES: This is a hint to the DMA-mapping subsystem
|
|
* that it's probably not worth the time to try to allocate memory to in a way
|
|
* that gives better TLB efficiency.
|
|
*/
|
|
#define DMA_ATTR_ALLOC_SINGLE_PAGES (1UL << 7)
|
|
/*
|
|
* DMA_ATTR_NO_WARN: This tells the DMA-mapping subsystem to suppress
|
|
* allocation failure reports (similarly to __GFP_NOWARN).
|
|
*/
|
|
#define DMA_ATTR_NO_WARN (1UL << 8)
|
|
|
|
/*
|
|
* DMA_ATTR_PRIVILEGED: used to indicate that the buffer is fully
|
|
* accessible at an elevated privilege level (and ideally inaccessible or
|
|
* at least read-only at lesser-privileged levels).
|
|
*/
|
|
#define DMA_ATTR_PRIVILEGED (1UL << 9)
|
|
|
|
/*
|
|
* A dma_addr_t can hold any valid DMA or bus address for the platform.
|
|
* It can be given to a device to use as a DMA source or target. A CPU cannot
|
|
* reference a dma_addr_t directly because there may be translation between
|
|
* its physical address space and the bus address space.
|
|
*/
|
|
struct dma_map_ops {
|
|
void* (*alloc)(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp,
|
|
unsigned long attrs);
|
|
void (*free)(struct device *dev, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle,
|
|
unsigned long attrs);
|
|
int (*mmap)(struct device *, struct vm_area_struct *,
|
|
void *, dma_addr_t, size_t,
|
|
unsigned long attrs);
|
|
|
|
int (*get_sgtable)(struct device *dev, struct sg_table *sgt, void *,
|
|
dma_addr_t, size_t, unsigned long attrs);
|
|
|
|
dma_addr_t (*map_page)(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size,
|
|
enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
/*
|
|
* map_sg returns 0 on error and a value > 0 on success.
|
|
* It should never return a value < 0.
|
|
*/
|
|
int (*map_sg)(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
void (*unmap_sg)(struct device *dev,
|
|
struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
dma_addr_t (*map_resource)(struct device *dev, phys_addr_t phys_addr,
|
|
size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
void (*unmap_resource)(struct device *dev, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
void (*sync_single_for_cpu)(struct device *dev,
|
|
dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction dir);
|
|
void (*sync_single_for_device)(struct device *dev,
|
|
dma_addr_t dma_handle, size_t size,
|
|
enum dma_data_direction dir);
|
|
void (*sync_sg_for_cpu)(struct device *dev,
|
|
struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir);
|
|
void (*sync_sg_for_device)(struct device *dev,
|
|
struct scatterlist *sg, int nents,
|
|
enum dma_data_direction dir);
|
|
void (*cache_sync)(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction direction);
|
|
int (*dma_supported)(struct device *dev, u64 mask);
|
|
u64 (*get_required_mask)(struct device *dev);
|
|
};
|
|
|
|
#define DMA_MAPPING_ERROR (~(dma_addr_t)0)
|
|
|
|
extern const struct dma_map_ops dma_virt_ops;
|
|
extern const struct dma_map_ops dma_dummy_ops;
|
|
|
|
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
|
|
|
|
#define DMA_MASK_NONE 0x0ULL
|
|
|
|
static inline int valid_dma_direction(int dma_direction)
|
|
{
|
|
return ((dma_direction == DMA_BIDIRECTIONAL) ||
|
|
(dma_direction == DMA_TO_DEVICE) ||
|
|
(dma_direction == DMA_FROM_DEVICE));
|
|
}
|
|
|
|
static inline int is_device_dma_capable(struct device *dev)
|
|
{
|
|
return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
|
|
}
|
|
|
|
#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
|
|
/*
|
|
* These three functions are only for dma allocator.
|
|
* Don't use them in device drivers.
|
|
*/
|
|
int dma_alloc_from_dev_coherent(struct device *dev, ssize_t size,
|
|
dma_addr_t *dma_handle, void **ret);
|
|
int dma_release_from_dev_coherent(struct device *dev, int order, void *vaddr);
|
|
|
|
int dma_mmap_from_dev_coherent(struct device *dev, struct vm_area_struct *vma,
|
|
void *cpu_addr, size_t size, int *ret);
|
|
|
|
void *dma_alloc_from_global_coherent(ssize_t size, dma_addr_t *dma_handle);
|
|
int dma_release_from_global_coherent(int order, void *vaddr);
|
|
int dma_mmap_from_global_coherent(struct vm_area_struct *vma, void *cpu_addr,
|
|
size_t size, int *ret);
|
|
|
|
#else
|
|
#define dma_alloc_from_dev_coherent(dev, size, handle, ret) (0)
|
|
#define dma_release_from_dev_coherent(dev, order, vaddr) (0)
|
|
#define dma_mmap_from_dev_coherent(dev, vma, vaddr, order, ret) (0)
|
|
|
|
static inline void *dma_alloc_from_global_coherent(ssize_t size,
|
|
dma_addr_t *dma_handle)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int dma_release_from_global_coherent(int order, void *vaddr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
|
|
void *cpu_addr, size_t size,
|
|
int *ret)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
|
|
|
|
static inline bool dma_is_direct(const struct dma_map_ops *ops)
|
|
{
|
|
return likely(!ops);
|
|
}
|
|
|
|
/*
|
|
* All the dma_direct_* declarations are here just for the indirect call bypass,
|
|
* and must not be used directly drivers!
|
|
*/
|
|
dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
|
|
unsigned long offset, size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs);
|
|
int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
|
|
enum dma_data_direction dir, unsigned long attrs);
|
|
|
|
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
|
|
defined(CONFIG_SWIOTLB)
|
|
void dma_direct_sync_single_for_device(struct device *dev,
|
|
dma_addr_t addr, size_t size, enum dma_data_direction dir);
|
|
void dma_direct_sync_sg_for_device(struct device *dev,
|
|
struct scatterlist *sgl, int nents, enum dma_data_direction dir);
|
|
#else
|
|
static inline void dma_direct_sync_single_for_device(struct device *dev,
|
|
dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
static inline void dma_direct_sync_sg_for_device(struct device *dev,
|
|
struct scatterlist *sgl, int nents, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \
|
|
defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \
|
|
defined(CONFIG_SWIOTLB)
|
|
void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs);
|
|
void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl,
|
|
int nents, enum dma_data_direction dir, unsigned long attrs);
|
|
void dma_direct_sync_single_for_cpu(struct device *dev,
|
|
dma_addr_t addr, size_t size, enum dma_data_direction dir);
|
|
void dma_direct_sync_sg_for_cpu(struct device *dev,
|
|
struct scatterlist *sgl, int nents, enum dma_data_direction dir);
|
|
#else
|
|
static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
}
|
|
static inline void dma_direct_unmap_sg(struct device *dev,
|
|
struct scatterlist *sgl, int nents, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
}
|
|
static inline void dma_direct_sync_single_for_cpu(struct device *dev,
|
|
dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
static inline void dma_direct_sync_sg_for_cpu(struct device *dev,
|
|
struct scatterlist *sgl, int nents, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_HAS_DMA
|
|
#include <asm/dma-mapping.h>
|
|
|
|
static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
|
|
{
|
|
if (dev && dev->dma_ops)
|
|
return dev->dma_ops;
|
|
return get_arch_dma_ops(dev ? dev->bus : NULL);
|
|
}
|
|
|
|
static inline void set_dma_ops(struct device *dev,
|
|
const struct dma_map_ops *dma_ops)
|
|
{
|
|
dev->dma_ops = dma_ops;
|
|
}
|
|
|
|
static inline dma_addr_t dma_map_page_attrs(struct device *dev,
|
|
struct page *page, size_t offset, size_t size,
|
|
enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
dma_addr_t addr;
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (dma_is_direct(ops))
|
|
addr = dma_direct_map_page(dev, page, offset, size, dir, attrs);
|
|
else
|
|
addr = ops->map_page(dev, page, offset, size, dir, attrs);
|
|
debug_dma_map_page(dev, page, offset, size, dir, addr);
|
|
|
|
return addr;
|
|
}
|
|
|
|
static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (dma_is_direct(ops))
|
|
dma_direct_unmap_page(dev, addr, size, dir, attrs);
|
|
else if (ops->unmap_page)
|
|
ops->unmap_page(dev, addr, size, dir, attrs);
|
|
debug_dma_unmap_page(dev, addr, size, dir);
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
unsigned long attrs)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
int ents;
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (dma_is_direct(ops))
|
|
ents = dma_direct_map_sg(dev, sg, nents, dir, attrs);
|
|
else
|
|
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,
|
|
unsigned long attrs)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
debug_dma_unmap_sg(dev, sg, nents, dir);
|
|
if (dma_is_direct(ops))
|
|
dma_direct_unmap_sg(dev, sg, nents, dir, attrs);
|
|
else if (ops->unmap_sg)
|
|
ops->unmap_sg(dev, sg, nents, dir, attrs);
|
|
}
|
|
|
|
static inline dma_addr_t dma_map_resource(struct device *dev,
|
|
phys_addr_t phys_addr,
|
|
size_t size,
|
|
enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
dma_addr_t addr;
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
|
|
/* Don't allow RAM to be mapped */
|
|
BUG_ON(pfn_valid(PHYS_PFN(phys_addr)));
|
|
|
|
addr = phys_addr;
|
|
if (ops && ops->map_resource)
|
|
addr = ops->map_resource(dev, phys_addr, size, dir, attrs);
|
|
|
|
debug_dma_map_resource(dev, phys_addr, size, dir, addr);
|
|
|
|
return addr;
|
|
}
|
|
|
|
static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (ops && ops->unmap_resource)
|
|
ops->unmap_resource(dev, addr, size, dir, attrs);
|
|
debug_dma_unmap_resource(dev, addr, size, dir);
|
|
}
|
|
|
|
static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
|
|
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 (dma_is_direct(ops))
|
|
dma_direct_sync_single_for_cpu(dev, addr, size, dir);
|
|
else 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)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (dma_is_direct(ops))
|
|
dma_direct_sync_single_for_device(dev, addr, size, dir);
|
|
else 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_sg_for_cpu(struct device *dev, struct scatterlist *sg,
|
|
int nelems, enum dma_data_direction dir)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (dma_is_direct(ops))
|
|
dma_direct_sync_sg_for_cpu(dev, sg, nelems, dir);
|
|
else 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)
|
|
{
|
|
const struct dma_map_ops *ops = get_dma_ops(dev);
|
|
|
|
BUG_ON(!valid_dma_direction(dir));
|
|
if (dma_is_direct(ops))
|
|
dma_direct_sync_sg_for_device(dev, sg, nelems, dir);
|
|
else 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);
|
|
|
|
}
|
|
|
|
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
|
{
|
|
debug_dma_mapping_error(dev, dma_addr);
|
|
|
|
if (dma_addr == DMA_MAPPING_ERROR)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
gfp_t flag, unsigned long attrs);
|
|
void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_handle, unsigned long attrs);
|
|
void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
|
|
gfp_t gfp, unsigned long attrs);
|
|
void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
|
|
dma_addr_t dma_handle);
|
|
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction dir);
|
|
int dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size,
|
|
unsigned long attrs);
|
|
int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size,
|
|
unsigned long attrs);
|
|
int dma_supported(struct device *dev, u64 mask);
|
|
int dma_set_mask(struct device *dev, u64 mask);
|
|
int dma_set_coherent_mask(struct device *dev, u64 mask);
|
|
u64 dma_get_required_mask(struct device *dev);
|
|
#else /* CONFIG_HAS_DMA */
|
|
static inline dma_addr_t dma_map_page_attrs(struct device *dev,
|
|
struct page *page, size_t offset, size_t size,
|
|
enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
return DMA_MAPPING_ERROR;
|
|
}
|
|
static inline void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
}
|
|
static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
|
|
int nents, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void dma_unmap_sg_attrs(struct device *dev,
|
|
struct scatterlist *sg, int nents, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
}
|
|
static inline dma_addr_t dma_map_resource(struct device *dev,
|
|
phys_addr_t phys_addr, size_t size, enum dma_data_direction dir,
|
|
unsigned long attrs)
|
|
{
|
|
return DMA_MAPPING_ERROR;
|
|
}
|
|
static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
}
|
|
static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
static inline void dma_sync_single_for_device(struct device *dev,
|
|
dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
static inline void dma_sync_sg_for_cpu(struct device *dev,
|
|
struct scatterlist *sg, int nelems, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
static inline void dma_sync_sg_for_device(struct device *dev,
|
|
struct scatterlist *sg, int nelems, enum dma_data_direction dir)
|
|
{
|
|
}
|
|
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
|
|
{
|
|
return -ENOMEM;
|
|
}
|
|
static inline void *dma_alloc_attrs(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
|
|
{
|
|
return NULL;
|
|
}
|
|
static void dma_free_attrs(struct device *dev, size_t size, void *cpu_addr,
|
|
dma_addr_t dma_handle, unsigned long attrs)
|
|
{
|
|
}
|
|
static inline void *dmam_alloc_attrs(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void dmam_free_coherent(struct device *dev, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle)
|
|
{
|
|
}
|
|
static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
|
|
enum dma_data_direction dir)
|
|
{
|
|
}
|
|
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, unsigned long attrs)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
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,
|
|
unsigned long attrs)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
static inline int dma_supported(struct device *dev, u64 mask)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int dma_set_mask(struct device *dev, u64 mask)
|
|
{
|
|
return -EIO;
|
|
}
|
|
static inline int dma_set_coherent_mask(struct device *dev, u64 mask)
|
|
{
|
|
return -EIO;
|
|
}
|
|
static inline u64 dma_get_required_mask(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_HAS_DMA */
|
|
|
|
static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
debug_dma_map_single(dev, ptr, size);
|
|
return dma_map_page_attrs(dev, virt_to_page(ptr), offset_in_page(ptr),
|
|
size, dir, attrs);
|
|
}
|
|
|
|
static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
|
|
size_t size, enum dma_data_direction dir, unsigned long attrs)
|
|
{
|
|
return dma_unmap_page_attrs(dev, addr, size, dir, attrs);
|
|
}
|
|
|
|
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)
|
|
{
|
|
return dma_sync_single_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)
|
|
{
|
|
return dma_sync_single_for_device(dev, addr + offset, size, dir);
|
|
}
|
|
|
|
#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, 0)
|
|
#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, 0)
|
|
#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, 0)
|
|
#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, 0)
|
|
#define dma_map_page(d, p, o, s, r) dma_map_page_attrs(d, p, o, s, r, 0)
|
|
#define dma_unmap_page(d, a, s, r) dma_unmap_page_attrs(d, a, s, r, 0)
|
|
#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, 0)
|
|
#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, 0)
|
|
|
|
extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
|
|
void *cpu_addr, dma_addr_t dma_addr, size_t size,
|
|
unsigned long attrs);
|
|
|
|
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);
|
|
|
|
int __init dma_atomic_pool_init(gfp_t gfp, pgprot_t prot);
|
|
bool dma_in_atomic_pool(void *start, size_t size);
|
|
void *dma_alloc_from_pool(size_t size, struct page **ret_page, gfp_t flags);
|
|
bool dma_free_from_pool(void *start, size_t size);
|
|
|
|
int
|
|
dma_common_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr,
|
|
dma_addr_t dma_addr, size_t size, unsigned long attrs);
|
|
|
|
static inline void *dma_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp)
|
|
{
|
|
|
|
return dma_alloc_attrs(dev, size, dma_handle, gfp,
|
|
(gfp & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0);
|
|
}
|
|
|
|
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, 0);
|
|
}
|
|
|
|
|
|
static inline u64 dma_get_mask(struct device *dev)
|
|
{
|
|
if (dev && dev->dma_mask && *dev->dma_mask)
|
|
return *dev->dma_mask;
|
|
return DMA_BIT_MASK(32);
|
|
}
|
|
|
|
/*
|
|
* Set both the DMA mask and the coherent DMA mask to the same thing.
|
|
* Note that we don't check the return value from dma_set_coherent_mask()
|
|
* as the DMA API guarantees that the coherent DMA mask can be set to
|
|
* the same or smaller than the streaming DMA mask.
|
|
*/
|
|
static inline int dma_set_mask_and_coherent(struct device *dev, u64 mask)
|
|
{
|
|
int rc = dma_set_mask(dev, mask);
|
|
if (rc == 0)
|
|
dma_set_coherent_mask(dev, mask);
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* Similar to the above, except it deals with the case where the device
|
|
* does not have dev->dma_mask appropriately setup.
|
|
*/
|
|
static inline int dma_coerce_mask_and_coherent(struct device *dev, u64 mask)
|
|
{
|
|
dev->dma_mask = &dev->coherent_dma_mask;
|
|
return dma_set_mask_and_coherent(dev, mask);
|
|
}
|
|
|
|
#ifndef arch_setup_dma_ops
|
|
static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
|
|
u64 size, const struct iommu_ops *iommu,
|
|
bool coherent) { }
|
|
#endif
|
|
|
|
#ifndef arch_teardown_dma_ops
|
|
static inline void arch_teardown_dma_ops(struct device *dev) { }
|
|
#endif
|
|
|
|
static inline unsigned int dma_get_max_seg_size(struct device *dev)
|
|
{
|
|
if (dev->dma_parms && dev->dma_parms->max_segment_size)
|
|
return dev->dma_parms->max_segment_size;
|
|
return SZ_64K;
|
|
}
|
|
|
|
static inline int dma_set_max_seg_size(struct device *dev, unsigned int size)
|
|
{
|
|
if (dev->dma_parms) {
|
|
dev->dma_parms->max_segment_size = size;
|
|
return 0;
|
|
}
|
|
return -EIO;
|
|
}
|
|
|
|
static inline unsigned long dma_get_seg_boundary(struct device *dev)
|
|
{
|
|
if (dev->dma_parms && dev->dma_parms->segment_boundary_mask)
|
|
return dev->dma_parms->segment_boundary_mask;
|
|
return DMA_BIT_MASK(32);
|
|
}
|
|
|
|
static inline int dma_set_seg_boundary(struct device *dev, unsigned long mask)
|
|
{
|
|
if (dev->dma_parms) {
|
|
dev->dma_parms->segment_boundary_mask = mask;
|
|
return 0;
|
|
}
|
|
return -EIO;
|
|
}
|
|
|
|
#ifndef dma_max_pfn
|
|
static inline unsigned long dma_max_pfn(struct device *dev)
|
|
{
|
|
return (*dev->dma_mask >> PAGE_SHIFT) + dev->dma_pfn_offset;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Please always use dma_alloc_coherent instead as it already zeroes the memory!
|
|
*/
|
|
static inline void *dma_zalloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t flag)
|
|
{
|
|
return dma_alloc_coherent(dev, size, dma_handle, flag);
|
|
}
|
|
|
|
static inline int dma_get_cache_alignment(void)
|
|
{
|
|
#ifdef ARCH_DMA_MINALIGN
|
|
return ARCH_DMA_MINALIGN;
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
/* flags for the coherent memory api */
|
|
#define DMA_MEMORY_EXCLUSIVE 0x01
|
|
|
|
#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
|
|
int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
|
|
dma_addr_t device_addr, size_t size, int flags);
|
|
void dma_release_declared_memory(struct device *dev);
|
|
void *dma_mark_declared_memory_occupied(struct device *dev,
|
|
dma_addr_t device_addr, size_t size);
|
|
#else
|
|
static inline int
|
|
dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
|
|
dma_addr_t device_addr, size_t size, int flags)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline void
|
|
dma_release_declared_memory(struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline void *
|
|
dma_mark_declared_memory_occupied(struct device *dev,
|
|
dma_addr_t device_addr, size_t size)
|
|
{
|
|
return ERR_PTR(-EBUSY);
|
|
}
|
|
#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
|
|
|
|
static inline void *dmam_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp)
|
|
{
|
|
return dmam_alloc_attrs(dev, size, dma_handle, gfp,
|
|
(gfp & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0);
|
|
}
|
|
|
|
static inline void *dma_alloc_wc(struct device *dev, size_t size,
|
|
dma_addr_t *dma_addr, gfp_t gfp)
|
|
{
|
|
unsigned long attrs = DMA_ATTR_WRITE_COMBINE;
|
|
|
|
if (gfp & __GFP_NOWARN)
|
|
attrs |= DMA_ATTR_NO_WARN;
|
|
|
|
return dma_alloc_attrs(dev, size, dma_addr, gfp, attrs);
|
|
}
|
|
#ifndef dma_alloc_writecombine
|
|
#define dma_alloc_writecombine dma_alloc_wc
|
|
#endif
|
|
|
|
static inline void dma_free_wc(struct device *dev, size_t size,
|
|
void *cpu_addr, dma_addr_t dma_addr)
|
|
{
|
|
return dma_free_attrs(dev, size, cpu_addr, dma_addr,
|
|
DMA_ATTR_WRITE_COMBINE);
|
|
}
|
|
#ifndef dma_free_writecombine
|
|
#define dma_free_writecombine dma_free_wc
|
|
#endif
|
|
|
|
static inline int dma_mmap_wc(struct device *dev,
|
|
struct vm_area_struct *vma,
|
|
void *cpu_addr, dma_addr_t dma_addr,
|
|
size_t size)
|
|
{
|
|
return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size,
|
|
DMA_ATTR_WRITE_COMBINE);
|
|
}
|
|
#ifndef dma_mmap_writecombine
|
|
#define dma_mmap_writecombine dma_mmap_wc
|
|
#endif
|
|
|
|
#ifdef CONFIG_NEED_DMA_MAP_STATE
|
|
#define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME) dma_addr_t ADDR_NAME
|
|
#define DEFINE_DMA_UNMAP_LEN(LEN_NAME) __u32 LEN_NAME
|
|
#define dma_unmap_addr(PTR, ADDR_NAME) ((PTR)->ADDR_NAME)
|
|
#define dma_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
|
|
#define dma_unmap_len(PTR, LEN_NAME) ((PTR)->LEN_NAME)
|
|
#define dma_unmap_len_set(PTR, LEN_NAME, VAL) (((PTR)->LEN_NAME) = (VAL))
|
|
#else
|
|
#define DEFINE_DMA_UNMAP_ADDR(ADDR_NAME)
|
|
#define DEFINE_DMA_UNMAP_LEN(LEN_NAME)
|
|
#define dma_unmap_addr(PTR, ADDR_NAME) (0)
|
|
#define dma_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
|
|
#define dma_unmap_len(PTR, LEN_NAME) (0)
|
|
#define dma_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
|
|
#endif
|
|
|
|
#endif
|