#include <dmaengine.h>

Data Fields
unsigned int	chancnt

unsigned int	privatecnt

struct list_head	channels

struct list_head	global_node

dma_cap_mask_t	cap_mask

unsigned short	max_xor

unsigned short	max_pq

u8	copy_align

u8	xor_align

u8	pq_align

u8	fill_align

int	dev_id

struct device *	dev

int(*	device_alloc_chan_resources )(struct dma_chan *chan)

void(*	device_free_chan_resources )(struct dma_chan *chan)

struct dma_async_tx_descriptor (	device_prep_dma_memcpy )(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, size_t len, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_xor )(struct dma_chan chan, dma_addr_t dest, dma_addr_t src, unsigned int src_cnt, size_t len, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_xor_val )(struct dma_chan chan, dma_addr_t src, unsigned int src_cnt, size_t len, enum sum_check_flags *result, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_pq )(struct dma_chan chan, dma_addr_t dst, dma_addr_t src, unsigned int src_cnt, const unsigned char scf, size_t len, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_pq_val )(struct dma_chan chan, dma_addr_t pq, dma_addr_t src, unsigned int src_cnt, const unsigned char scf, size_t len, enum sum_check_flags *pqres, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_memset )(struct dma_chan *chan, dma_addr_t dest, int value, size_t len, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_interrupt )(struct dma_chan *chan, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_dma_sg )(struct dma_chan chan, struct scatterlist dst_sg, unsigned int dst_nents, struct scatterlist *src_sg, unsigned int src_nents, unsigned long flags)

struct dma_async_tx_descriptor (	device_prep_slave_sg )(struct dma_chan chan, struct scatterlist sgl, unsigned int sg_len, enum dma_transfer_direction direction, unsigned long flags, void *context)

struct dma_async_tx_descriptor (	device_prep_dma_cyclic )(struct dma_chan chan, dma_addr_t buf_addr, size_t buf_len, size_t period_len, enum dma_transfer_direction direction, unsigned long flags, void context)

struct dma_async_tx_descriptor (	device_prep_interleaved_dma )(struct dma_chan chan, struct dma_interleaved_template xt, unsigned long flags)

int(*	device_control )(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg)

enum dma_status(*	device_tx_status )(struct dma_chan chan, dma_cookie_t cookie, struct dma_tx_state txstate)

void(*	device_issue_pending )(struct dma_chan *chan)

Detailed Description

struct dma_device - info on the entity supplying DMA services : how many DMA channels are supported : how many DMA channels are requested by dma_request_channel : the list of struct dma_chan : list_head for global dma_device_list : one or more dma_capability flags : maximum number of xor sources, 0 if no capability : maximum number of PQ sources and PQ-continue capability : alignment shift for memcpy operations : alignment shift for xor operations : alignment shift for pq operations : alignment shift for memset operations : unique device ID : struct device reference for dma mapping api : allocate resources and return the number of allocated descriptors : release DMA channel's resources : prepares a memcpy operation : prepares a xor operation : prepares a xor validation operation : prepares a pq operation : prepares a pqzero_sum operation : prepares a memset operation : prepares an end of chain interrupt operation : prepares a slave dma operation : prepare a cyclic dma operation suitable for audio. The function takes a buffer of size buf_len. The callback function will be called after period_len bytes have been transferred. : Transfer expression in a generic way. : manipulate all pending operations on a channel, returns zero or error code : poll for transaction completion, the optional txstate parameter can be supplied with a pointer to get a struct with auxiliary transfer status information, otherwise the call will just return a simple status code : push pending transactions to hardware