bouncebuf.h File Reference

#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>

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Data Structures
struct	bounce_buffer

Macros
#define	GEN_BB_READ   (1 << 0)
#define	GEN_BB_WRITE   (1 << 1)
#define	GEN_BB_RW   (GEN_BB_READ | GEN_BB_WRITE)
#define	DMA_MINALIGN   (64)
#define	ROUND(a, b)   (((a) + (b) - 1) & ~((b) - 1))
#define	ALLOC_CACHE_ALIGN_BUFFER(type, name, size)
#define	ARCH_DMA_MINALIGN   (DMA_MINALIGN)

Functions
int	bounce_buffer_start (struct bounce_buffer *state, void *data, size_t len, unsigned int flags)
	bounce_buffer_start() – Start the bounce buffer session state: stores state passed between bounce_buffer_{start,stop} data: pointer to buffer to be aligned len: length of the buffer flags: flags describing the transaction, see above. More...
int	bounce_buffer_stop (struct bounce_buffer *state)
	bounce_buffer_stop() – Finish the bounce buffer session state: stores state passed between bounce_buffer_{start,stop} More...

Macro Definition Documentation

ALLOC_CACHE_ALIGN_BUFFER

#define ALLOC_CACHE_ALIGN_BUFFER	(		type,
			name,
			size
	)

Value:

        char __##name[ROUND(size * sizeof(type), DMA_MINALIGN) +     \
                      DMA_MINALIGN - 1];                             \
        type *name = (type *) ALIGN_UP((uintptr_t)__##name, DMA_MINALIGN)

Definition at line 76 of file bouncebuf.h.

ARCH_DMA_MINALIGN

#define ARCH_DMA_MINALIGN   (DMA_MINALIGN)

Definition at line 81 of file bouncebuf.h.

DMA_MINALIGN

#define DMA_MINALIGN   (64)

Definition at line 74 of file bouncebuf.h.

GEN_BB_READ

#define GEN_BB_READ   (1 << 0)

Definition at line 20 of file bouncebuf.h.

GEN_BB_RW

#define GEN_BB_RW   (GEN_BB_READ | GEN_BB_WRITE)

Definition at line 37 of file bouncebuf.h.

GEN_BB_WRITE

#define GEN_BB_WRITE   (1 << 1)

Definition at line 28 of file bouncebuf.h.

ROUND

#define ROUND	(		a,
			b
	)		(((a) + (b) - 1) & ~((b) - 1))

Definition at line 75 of file bouncebuf.h.

Function Documentation

bounce_buffer_start()

int bounce_buffer_start	(	struct bounce_buffer *	state,
		void *	data,
		size_t	len,
		unsigned int	flags
	)

bounce_buffer_start() – Start the bounce buffer session state: stores state passed between bounce_buffer_{start,stop} data: pointer to buffer to be aligned len: length of the buffer flags: flags describing the transaction, see above.

Definition at line 32 of file bouncebuf.c.

References addr_aligned(), ARCH_DMA_MINALIGN, dcache_clean_invalidate_by_mva, GEN_BB_READ, memalign(), memcpy(), and ROUND.

Referenced by sdhci_send_command().

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bounce_buffer_stop()

int bounce_buffer_stop

(

struct bounce_buffer *

state

)

bounce_buffer_stop() – Finish the bounce buffer session state: stores state passed between bounce_buffer_{start,stop}

Definition at line 61 of file bouncebuf.c.

References dcache_invalidate_by_mva, free(), GEN_BB_WRITE, and memcpy().

Referenced by sdhci_send_command().

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