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linux-next/drivers/dma/coh901318_lli.h
Vinod Koul db8196df4b dmaengine: move drivers to dma_transfer_direction
fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves dma/drivers/* to use new enum

Cc: Jassi Brar <jaswinder.singh@linaro.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Viresh Kumar <viresh.kumar@st.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Mika Westerberg <mika.westerberg@iki.fi>
Cc: H Hartley Sweeten <hartleys@visionengravers.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Zhang Wei <zw@zh-kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Yong Wang <yong.y.wang@intel.com>
Cc: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Cc: Boojin Kim <boojin.kim@samsung.com>
Cc: Barry Song <Baohua.Song@csr.com>
Acked-by: Mika Westerberg <mika.westerberg@iki.fi>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
2011-10-27 20:53:43 +05:30

125 lines
3.4 KiB
C

/*
* driver/dma/coh901318_lli.h
*
* Copyright (C) 2007-2009 ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
* Support functions for handling lli for coh901318
* Author: Per Friden <per.friden@stericsson.com>
*/
#ifndef COH901318_LLI_H
#define COH901318_LLI_H
#include <mach/coh901318.h>
struct device;
struct coh901318_pool {
spinlock_t lock;
struct dma_pool *dmapool;
struct device *dev;
#ifdef CONFIG_DEBUG_FS
int debugfs_pool_counter;
#endif
};
struct device;
/**
* coh901318_pool_create() - Creates an dma pool for lli:s
* @pool: pool handle
* @dev: dma device
* @lli_nbr: number of lli:s in the pool
* @algin: address alignemtn of lli:s
* returns 0 on success otherwise none zero
*/
int coh901318_pool_create(struct coh901318_pool *pool,
struct device *dev,
size_t lli_nbr, size_t align);
/**
* coh901318_pool_destroy() - Destroys the dma pool
* @pool: pool handle
* returns 0 on success otherwise none zero
*/
int coh901318_pool_destroy(struct coh901318_pool *pool);
/**
* coh901318_lli_alloc() - Allocates a linked list
*
* @pool: pool handle
* @len: length to list
* return: none NULL if success otherwise NULL
*/
struct coh901318_lli *
coh901318_lli_alloc(struct coh901318_pool *pool,
unsigned int len);
/**
* coh901318_lli_free() - Returns the linked list items to the pool
* @pool: pool handle
* @lli: reference to lli pointer to be freed
*/
void coh901318_lli_free(struct coh901318_pool *pool,
struct coh901318_lli **lli);
/**
* coh901318_lli_fill_memcpy() - Prepares the lli:s for dma memcpy
* @pool: pool handle
* @lli: allocated lli
* @src: src address
* @size: transfer size
* @dst: destination address
* @ctrl_chained: ctrl for chained lli
* @ctrl_last: ctrl for the last lli
* returns number of CPU interrupts for the lli, negative on error.
*/
int
coh901318_lli_fill_memcpy(struct coh901318_pool *pool,
struct coh901318_lli *lli,
dma_addr_t src, unsigned int size,
dma_addr_t dst, u32 ctrl_chained, u32 ctrl_last);
/**
* coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer
* @pool: pool handle
* @lli: allocated lli
* @buf: transfer buffer
* @size: transfer size
* @dev_addr: address of periphal
* @ctrl_chained: ctrl for chained lli
* @ctrl_last: ctrl for the last lli
* @dir: direction of transfer (to or from device)
* returns number of CPU interrupts for the lli, negative on error.
*/
int
coh901318_lli_fill_single(struct coh901318_pool *pool,
struct coh901318_lli *lli,
dma_addr_t buf, unsigned int size,
dma_addr_t dev_addr, u32 ctrl_chained, u32 ctrl_last,
enum dma_transfer_direction dir);
/**
* coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer
* @pool: pool handle
* @lli: allocated lli
* @sg: scatter gather list
* @nents: number of entries in sg
* @dev_addr: address of periphal
* @ctrl_chained: ctrl for chained lli
* @ctrl: ctrl of middle lli
* @ctrl_last: ctrl for the last lli
* @dir: direction of transfer (to or from device)
* @ctrl_irq_mask: ctrl mask for CPU interrupt
* returns number of CPU interrupts for the lli, negative on error.
*/
int
coh901318_lli_fill_sg(struct coh901318_pool *pool,
struct coh901318_lli *lli,
struct scatterlist *sg, unsigned int nents,
dma_addr_t dev_addr, u32 ctrl_chained,
u32 ctrl, u32 ctrl_last,
enum dma_transfer_direction dir, u32 ctrl_irq_mask);
#endif /* COH901318_LLI_H */