rtio.h File Reference

#include <zephyr/kernel.h>
#include <zephyr/drivers/spi.h>
#include <zephyr/rtio/rtio.h>

Go to the source code of this file.

Data Structures
struct	spi_rtio
	Driver context for implementing SPI with RTIO. More...

Macros
#define	SPI_RTIO_DEFINE(_name, _sq_sz, _cq_sz)
	Statically define a spi_rtio context.

Functions
int	spi_rtio_copy (struct rtio *r, struct rtio_iodev *iodev, const struct spi_buf_set *tx_bufs, const struct spi_buf_set *rx_bufs, struct rtio_sqe **last_sqe)
	Copy the tx_bufs and rx_bufs into a set of RTIO requests.
void	spi_rtio_init (struct spi_rtio *ctx, const struct device *dev)
	Initialize a SPI RTIO context.
bool	spi_rtio_complete (struct spi_rtio *ctx, int status)
	Signal that the current (ctx->txn_curr) submission has been completed.
bool	spi_rtio_submit (struct spi_rtio *ctx, struct rtio_iodev_sqe *iodev_sqe)
	Submit, atomically, a submission to work on at some point.
int	spi_rtio_transceive (struct spi_rtio *ctx, const struct spi_config *config, const struct spi_buf_set *tx_bufs, const struct spi_buf_set *rx_bufs)
	Perform a SPI Transfer (transceive) in a blocking call.
void	spi_rtio_iodev_default_submit (const struct device *dev, struct rtio_iodev_sqe *iodev_sqe)
	Fallback SPI RTIO submit implementation.

Macro Definition Documentation

SPI_RTIO_DEFINE

#define SPI_RTIO_DEFINE	(		_name,
			_sq_sz,
			_cq_sz )

Value:

        RTIO_DEFINE(CONCAT(_name, _r), _sq_sz, _cq_sz);                        \
        static struct spi_rtio _name = {                                       \
                .r = &CONCAT(_name, _r),                                       \
        };

Statically define a spi_rtio context.

Parameters

_name	Symbolic name of the context
_sq_sz	Submission queue entry pool size
_cq_sz	Completion queue entry pool size

Function Documentation

spi_rtio_complete()

bool spi_rtio_complete	(	struct spi_rtio *	ctx,
		int	status )

Signal that the current (ctx->txn_curr) submission has been completed.

Parameters

ctx	SPI RTIO driver context
status	Completion status, negative values are errors

Return values

true	Next submission is ready to start
false	No more submissions to work on

spi_rtio_copy()

int spi_rtio_copy	(	struct rtio *	r,
		struct rtio_iodev *	iodev,
		const struct spi_buf_set *	tx_bufs,
		const struct spi_buf_set *	rx_bufs,
		struct rtio_sqe **	last_sqe )

Copy the tx_bufs and rx_bufs into a set of RTIO requests.

Parameters

[in]	r	rtio context
[in]	iodev	iodev to transceive with
[in]	tx_bufs	transmit buffer set
[in]	rx_bufs	receive buffer set
[out]	last_sqe	last sqe submitted, NULL if not enough memory

Return values

Number	of submission queue entries
-ENOMEM	out of memory

spi_rtio_init()

void spi_rtio_init	(	struct spi_rtio *	ctx,
		const struct device *	dev )

Initialize a SPI RTIO context.

Parameters

ctx	SPI RTIO driver context
dev	SPI bus

spi_rtio_iodev_default_submit()

void spi_rtio_iodev_default_submit	(	const struct device *	dev,
		struct rtio_iodev_sqe *	iodev_sqe )

Fallback SPI RTIO submit implementation.

Default RTIO SPI implementation for drivers who do no yet have native support. For details, see spi_iodev_submit.

spi_rtio_submit()

bool spi_rtio_submit	(	struct spi_rtio *	ctx,
		struct rtio_iodev_sqe *	iodev_sqe )

Submit, atomically, a submission to work on at some point.

Return values

true	Next submission is ready to start
false	No new submission to start or submissions are in progress already

spi_rtio_transceive()

int spi_rtio_transceive	(	struct spi_rtio *	ctx,
		const struct spi_config *	config,
		const struct spi_buf_set *	tx_bufs,
		const struct spi_buf_set *	rx_bufs )

Perform a SPI Transfer (transceive) in a blocking call.

Provides a compatible API for the existing spi_transceive API by blocking the caller until the operation is complete. For details see spi_transceive.