Data Structures
struct	pi_udma_fifo_t

Functions
static void	pi_udma_fifo_init (pi_udma_fifo_t *fifo)
	Initialize UDMA fifo. More...

static int32_t	pi_udma_fifo_hw_buffer_empty (pi_udma_fifo_t *fifo)
	Get free HW slot ID. More...

static void	pi_udma_fifo_hw_fifo_task_enqueue (pi_udma_fifo_t fifo, pi_task_t task, uint8_t hw_buff_idx)
	Enqueue a task in HW buffer. More...

static pi_task_t *	pi_udma_fifo_hw_fifo_task_pop (pi_udma_fifo_t *fifo)
	Pop a task from HW buffer. More...

static pi_task_t *	pi_udma_fifo_hw_fifo_current_task_get (pi_udma_fifo_t *fifo, uint8_t hw_buff_idx)
	Get current task in HW buffer. More...

static void	pi_udma_fifo_sw_fifo_task_enqueue (pi_udma_fifo_t fifo, pi_task_t task)
	Enqueue a task in SW fifo. More...

static pi_task_t *	pi_udma_fifo_sw_fifo_task_pop (pi_udma_fifo_t *fifo)
	Pop a task from SW fifo. More...

static void	pi_udma_fifo_buffer_set (struct pi_task task, uint32_t buff, uint32_t *size, uint32_t max_size)
	Compute UDMA register values. More...

Function Documentation

static void pi_udma_fifo_buffer_set	(	struct pi_task *	task,
		uint32_t *	buff,
		uint32_t *	size,
		uint32_t	max_size
	)

inlinestatic

Parameters

task	Current transfer(struct pi_task).
buff	Pointer to L2 buffer address.
size	Pointer to size of buffer.
max_size	Max size supported by UDMA.

References max_size.

Referenced by __pi_octospi_2d_copy_exec(), __pi_uart_copy_exec(), and __pi_uart_handler().

static int32_t pi_udma_fifo_hw_buffer_empty ( pi_udma_fifo_t * fifo )

inlinestatic

This function returns ID of first free UDMA HW slot.

Parameters

fifo	Pointer to UDMA fifo struct.

Return values

-1	No free slot.
slot_id	ID of free slot.

References pi_udma_fifo_t::hw_buffer.

Referenced by __pi_octospi_2d_copy(), __pi_octospi_irq_handler(), __pi_uart_copy(), and __pi_uart_handler().

static pi_task_t* pi_udma_fifo_hw_fifo_current_task_get	(	pi_udma_fifo_t *	fifo,
		uint8_t	hw_buff_idx
	)

inlinestatic

Parameters

fifo	Pointer to UDMA fifo struct.
hw_buff_idx	HW slot ID.

Return values

Task	Pointer to current struct pi_task.
NULL	If HW buffer is empty.

References pi_udma_fifo_t::hw_buffer.

Referenced by __pi_uart_handler().

static void pi_udma_fifo_hw_fifo_task_enqueue	(	pi_udma_fifo_t *	fifo,
		pi_task_t *	task,
		uint8_t	hw_buff_idx
	)

inlinestatic

Parameters

fifo	Pointer to UDMA fifo struct.
task	Pointer to task to enqueue.
hw_buff_idx	HW slot ID.

References disable_irq(), pi_udma_fifo_t::hw_buffer, and restore_irq().

Referenced by __pi_octospi_2d_copy_exec(), __pi_uart_copy_exec(), and __pi_uart_handler().

static pi_task_t* pi_udma_fifo_hw_fifo_task_pop ( pi_udma_fifo_t * fifo )

inlinestatic

Parameters

fifo	Pointer to UDMA fifo struct.

Return values

Task	Pointer to current struct pi_task.
NULL	If HW buffers are empty.

References pi_udma_fifo_t::hw_buffer.

Referenced by __pi_octospi_irq_handler(), __pi_uart_handler(), __pi_uart_rx_abort(), __pi_uart_rx_timeout_abort(), __pi_uart_tx_abort(), and __pi_uart_tx_timeout_abort().

static void pi_udma_fifo_init ( pi_udma_fifo_t * fifo )

inlinestatic

struct pi_task data field array desc : data[0] = l2_buffer data[1] = size data[2] = channel

Parameters

fifo	Pointer to UDMA fifo struct.

References pi_udma_fifo_t::fifo_head, pi_udma_fifo_t::fifo_tail, and pi_udma_fifo_t::hw_buffer.

Referenced by __pi_octospi_open(), and __pi_uart_open().

static void pi_udma_fifo_sw_fifo_task_enqueue	(	pi_udma_fifo_t *	fifo,
		pi_task_t *	task
	)

inlinestatic

Parameters

fifo	Pointer to UDMA fifo struct.
task	Pointer to task to enqueue.

References disable_irq(), pi_udma_fifo_t::fifo_head, pi_udma_fifo_t::fifo_tail, pi_task_t::next, and restore_irq().

Referenced by __pi_octospi_2d_copy(), and __pi_uart_copy().

static pi_task_t* pi_udma_fifo_sw_fifo_task_pop ( pi_udma_fifo_t * fifo )

inlinestatic

Parameters

fifo	Pointer to UDMA fifo struct.

Return values

Task	Pointer to first struct pi_task from SW fifo.
NULL	If SW fifo is empty.

References pi_udma_fifo_t::fifo_head, and pi_task_t::next.

Referenced by __pi_octospi_irq_handler(), and __pi_uart_handler().

Data Structures

Functions

Function Documentation