sdma_channel Struct Reference

Data Fields
struct sdma_engine *	sdma
unsigned int	channel
enum dma_transfer_direction	direction
enum sdma_peripheral_type	peripheral_type
unsigned int	event_id0
unsigned int	event_id1
enum dma_slave_buswidth	word_size
unsigned int	buf_tail
struct completion	done
unsigned int	num_bd
struct sdma_buffer_descriptor *	bd
dma_addr_t	bd_phys
unsigned int	pc_from_device
unsigned int	pc_to_device
unsigned long	flags
dma_addr_t	per_address
unsigned long	event_mask [2]
unsigned long	watermark_level
u32	shp_addr
u32	per_addr
struct dma_chan	chan
spinlock_t	lock
struct dma_async_tx_descriptor	desc
enum dma_status	status
unsigned int	chn_count
unsigned int	chn_real_count
struct tasklet_struct	tasklet

Detailed Description

struct sdma_channel - housekeeping for a SDMA channel

pointer to the SDMA engine for this channel the channel number, matches dmaengine chan_id + 1 transfer type. Needed for setting SDMA script Peripheral type. Needed for setting SDMA script aka dma request line for channels that use 2 events peripheral access size ID of the buffer that was processed channel completion max NUM_BD. number of descriptors currently handling

Definition at line 249 of file imx-sdma.c.

Field Documentation

struct sdma_buffer_descriptor* bd

Definition at line 260 of file imx-sdma.c.

dma_addr_t bd_phys

Definition at line 261 of file imx-sdma.c.

unsigned int buf_tail

Definition at line 257 of file imx-sdma.c.

struct dma_chan chan

Definition at line 268 of file imx-sdma.c.

unsigned int channel

Definition at line 251 of file imx-sdma.c.

unsigned int chn_count

Definition at line 272 of file imx-sdma.c.

unsigned int chn_real_count

Definition at line 273 of file imx-sdma.c.

struct dma_async_tx_descriptor desc

Definition at line 270 of file imx-sdma.c.

enum dma_transfer_direction direction

Definition at line 252 of file imx-sdma.c.

struct completion done

Definition at line 258 of file imx-sdma.c.

unsigned int event_id0

Definition at line 254 of file imx-sdma.c.

unsigned int event_id1

Definition at line 255 of file imx-sdma.c.

unsigned long event_mask[2]

Definition at line 265 of file imx-sdma.c.

unsigned long flags

Definition at line 263 of file imx-sdma.c.

spinlock_t lock

Definition at line 269 of file imx-sdma.c.

unsigned int num_bd

Definition at line 259 of file imx-sdma.c.

unsigned int pc_from_device

Definition at line 262 of file imx-sdma.c.

unsigned int pc_to_device

Definition at line 262 of file imx-sdma.c.

u32 per_addr

Definition at line 267 of file imx-sdma.c.

dma_addr_t per_address

Definition at line 264 of file imx-sdma.c.

enum sdma_peripheral_type peripheral_type

Definition at line 253 of file imx-sdma.c.

struct sdma_engine* sdma

Definition at line 250 of file imx-sdma.c.

u32 shp_addr

Definition at line 267 of file imx-sdma.c.

enum dma_status status

Definition at line 271 of file imx-sdma.c.

struct tasklet_struct tasklet

Definition at line 274 of file imx-sdma.c.

unsigned long watermark_level

Definition at line 266 of file imx-sdma.c.

enum dma_slave_buswidth word_size

Definition at line 256 of file imx-sdma.c.

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The documentation for this struct was generated from the following file:

• drivers/dma/imx-sdma.c