mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-05 10:29:37 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/*
|
|
* linux/include/asm-arm/mach/dma.h
|
|
*
|
|
* Copyright (C) 1998-2000 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* 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)(dmach_t, dma_t *); /* optional */
|
|
void (*free)(dmach_t, dma_t *); /* optional */
|
|
void (*enable)(dmach_t, dma_t *); /* mandatory */
|
|
void (*disable)(dmach_t, dma_t *); /* mandatory */
|
|
int (*residue)(dmach_t, dma_t *); /* optional */
|
|
int (*setspeed)(dmach_t, dma_t *, int); /* optional */
|
|
char *type;
|
|
};
|
|
|
|
struct dma_struct {
|
|
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 using_sg:1; /* using scatter list? */
|
|
dmamode_t dma_mode; /* DMA mode */
|
|
int speed; /* DMA speed */
|
|
|
|
unsigned int lock; /* Device is allocated */
|
|
const char *device_id; /* Device name */
|
|
|
|
unsigned int dma_base; /* Controller base address */
|
|
int dma_irq; /* Controller IRQ */
|
|
struct scatterlist cur_sg; /* Current controller buffer */
|
|
unsigned int state;
|
|
|
|
struct dma_ops *d_ops;
|
|
};
|
|
|
|
/* Prototype: void arch_dma_init(dma)
|
|
* Purpose : Initialise architecture specific DMA
|
|
* Params : dma - pointer to array of DMA structures
|
|
*/
|
|
extern void arch_dma_init(dma_t *dma);
|
|
|
|
extern void isa_init_dma(dma_t *dma);
|