mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 06:06:44 +07:00
1b0fac4587
Continuing the work started in 411f0f3edc ...
This enables code with a dma path, that compiles away, to build without
requiring additional code factoring. It also prevents code that calls
dma_alloc_coherent and dma_free_coherent from linking whereas previously
the code would hit a BUG() at run time. Finally, it allows archs that set
!HAS_DMA to delete their asm/dma-mapping.h file.
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: John W. Linville <linville@tuxdriver.com>
Cc: Kyle McMartin <kyle@parisc-linux.org>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: <geert@linux-m68k.org>
Cc: <zippel@linux-m68k.org>
Cc: <spyro@f2s.com>
Cc: <ysato@users.sourceforge.jp>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
#ifndef _ASM_LINUX_DMA_MAPPING_H
|
|
#define _ASM_LINUX_DMA_MAPPING_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
|
|
/* These definitions mirror those in pci.h, so they can be used
|
|
* interchangeably with their PCI_ counterparts */
|
|
enum dma_data_direction {
|
|
DMA_BIDIRECTIONAL = 0,
|
|
DMA_TO_DEVICE = 1,
|
|
DMA_FROM_DEVICE = 2,
|
|
DMA_NONE = 3,
|
|
};
|
|
|
|
#define DMA_64BIT_MASK 0xffffffffffffffffULL
|
|
#define DMA_48BIT_MASK 0x0000ffffffffffffULL
|
|
#define DMA_40BIT_MASK 0x000000ffffffffffULL
|
|
#define DMA_39BIT_MASK 0x0000007fffffffffULL
|
|
#define DMA_32BIT_MASK 0x00000000ffffffffULL
|
|
#define DMA_31BIT_MASK 0x000000007fffffffULL
|
|
#define DMA_30BIT_MASK 0x000000003fffffffULL
|
|
#define DMA_29BIT_MASK 0x000000001fffffffULL
|
|
#define DMA_28BIT_MASK 0x000000000fffffffULL
|
|
#define DMA_24BIT_MASK 0x0000000000ffffffULL
|
|
|
|
static inline int valid_dma_direction(int dma_direction)
|
|
{
|
|
return ((dma_direction == DMA_BIDIRECTIONAL) ||
|
|
(dma_direction == DMA_TO_DEVICE) ||
|
|
(dma_direction == DMA_FROM_DEVICE));
|
|
}
|
|
|
|
#ifdef CONFIG_HAS_DMA
|
|
#include <asm/dma-mapping.h>
|
|
#else
|
|
#include <asm-generic/dma-mapping-broken.h>
|
|
#endif
|
|
|
|
/* Backwards compat, remove in 2.7.x */
|
|
#define dma_sync_single dma_sync_single_for_cpu
|
|
#define dma_sync_sg dma_sync_sg_for_cpu
|
|
|
|
extern u64 dma_get_required_mask(struct device *dev);
|
|
|
|
/* flags for the coherent memory api */
|
|
#define DMA_MEMORY_MAP 0x01
|
|
#define DMA_MEMORY_IO 0x02
|
|
#define DMA_MEMORY_INCLUDES_CHILDREN 0x04
|
|
#define DMA_MEMORY_EXCLUSIVE 0x08
|
|
|
|
#ifndef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
|
|
static inline int
|
|
dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
|
|
dma_addr_t device_addr, size_t size, int flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
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
|
|
|
|
/*
|
|
* Managed DMA API
|
|
*/
|
|
extern void *dmam_alloc_coherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp);
|
|
extern void dmam_free_coherent(struct device *dev, size_t size, void *vaddr,
|
|
dma_addr_t dma_handle);
|
|
extern void *dmam_alloc_noncoherent(struct device *dev, size_t size,
|
|
dma_addr_t *dma_handle, gfp_t gfp);
|
|
extern void dmam_free_noncoherent(struct device *dev, size_t size, void *vaddr,
|
|
dma_addr_t dma_handle);
|
|
#ifdef ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
|
|
extern int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
|
|
dma_addr_t device_addr, size_t size,
|
|
int flags);
|
|
extern void dmam_release_declared_memory(struct device *dev);
|
|
#else /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
|
|
static inline int dmam_declare_coherent_memory(struct device *dev,
|
|
dma_addr_t bus_addr, dma_addr_t device_addr,
|
|
size_t size, gfp_t gfp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void dmam_release_declared_memory(struct device *dev)
|
|
{
|
|
}
|
|
#endif /* ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY */
|
|
|
|
#endif
|