Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* arch/arm/include/asm/mach/dma.h
|
|
*
|
|
* Copyright (C) 1998-2000 Russell King
|
|
*
|
|
* This header file describes the interface between the generic DMA handler
|
|
* (dma.c) and the architecture-specific DMA backends (dma-*.c)
|
|
*/
|
|
|
|
struct dma_struct;
|
|
typedef struct dma_struct dma_t;
|
|
|
|
struct dma_ops {
|
|
int (*request)(unsigned int, dma_t *); /* optional */
|
|
void (*free)(unsigned int, dma_t *); /* optional */
|
|
void (*enable)(unsigned int, dma_t *); /* mandatory */
|
|
void (*disable)(unsigned int, dma_t *); /* mandatory */
|
|
int (*residue)(unsigned int, dma_t *); /* optional */
|
|
int (*setspeed)(unsigned int, dma_t *, int); /* optional */
|
|
const char *type;
|
|
};
|
|
|
|
struct dma_struct {
|
|
void *addr; /* single DMA address */
|
|
unsigned long count; /* single DMA size */
|
|
struct scatterlist buf; /* single DMA */
|
|
int sgcount; /* number of DMA SG */
|
|
struct scatterlist *sg; /* DMA Scatter-Gather List */
|
|
|
|
unsigned int active:1; /* Transfer active */
|
|
unsigned int invalid:1; /* Address/Count changed */
|
|
|
|
unsigned int dma_mode; /* DMA mode */
|
|
int speed; /* DMA speed */
|
|
|
|
unsigned int lock; /* Device is allocated */
|
|
const char *device_id; /* Device name */
|
|
|
|
const struct dma_ops *d_ops;
|
|
};
|
|
|
|
/*
|
|
* isa_dma_add - add an ISA-style DMA channel
|
|
*/
|
|
extern int isa_dma_add(unsigned int, dma_t *dma);
|