udma_ring.h File Reference

Introduction

UDMA ring related parameters and API.

Go to the source code of this file.

Data Structures
struct	Udma_RingPrms
	UDMA ring parameters. More...
struct	Udma_RingObject
	Opaque UDMA ring object. More...

Macros
#define	UDMA_RING_INVALID   ((uint16_t) TISCI_MSG_VALUE_RM_NULL_RING_TYPE)
	Macro used to specify that ring ID is invalid. Used in the API Udma_ringGetNum. More...
#define	UDMA_RING_ANY   ((uint16_t) 0xFFFEU)
	Macro used to specify any available free ring while requesting one. Used in the API Udma_ringAlloc. More...
#define	UDMA_RING_VIRTID_INVALID   ((uint16_t) 0xFFFFU)
	Macro used to specify that ring virt ID is invalid. Used in the API Udma_ringAlloc. More...
#define	UDMA_RING_SIZE_CHECK_SKIP   (0xABDCABCDU)
	Macro used to skip the ring size check by driver. More...
#define	UDMA_RING_ORDERID_MAX   (0x0FU)
	Macro used to specificy the maximum ring order id value. More...
UDMA Ring element size
Encoded ring element size to be programmed into the elsize field of the ring's RING_SIZE register. To calculate the encoded size use the formula (log2(size_bytes) - 2), where "size_bytes" cannot be greater than 256 bytes. This calculation is already taken care in below macro.
#define	UDMA_RING_ES_4BYTES   ((uint8_t) 0x00U)
	4 bytes Element size More...
#define	UDMA_RING_ES_8BYTES   ((uint8_t) 0x01U)
	8 bytes Element size More...
#define	UDMA_RING_ES_16BYTES   ((uint8_t) 0x02U)
	16 bytes Element size More...
#define	UDMA_RING_ES_32BYTES   ((uint8_t) 0x03U)
	32 bytes Element size More...
#define	UDMA_RING_ES_64BYTES   ((uint8_t) 0x04U)
	64 bytes Element size More...
#define	UDMA_RING_ES_128BYTES   ((uint8_t) 0x05U)
	128 bytes Element size More...
#define	UDMA_RING_ES_256BYTES   ((uint8_t) 0x06U)
	256 bytes Element size More...

Functions
int32_t	Udma_ringAlloc (Udma_DrvHandle drvHandle, Udma_RingHandle ringHandle, uint16_t ringNum, const Udma_RingPrms *ringPrms)
	UDMA ring allocation and configuration API. More...
int32_t	Udma_ringFree (Udma_RingHandle ringHandle)
	UDMA free ring. More...
int32_t	Udma_ringAttach (Udma_DrvHandle drvHandle, Udma_RingHandle ringHandle, uint16_t ringNum)
	UDMA ring attach API. This API is used to attach to an already allocated and configured ring. This API differs from ring alloc API in this aspect - it doesn't allocate resource from RM and doesn't configure the ring through sciclient/DMSC API. More...
int32_t	Udma_ringDetach (Udma_RingHandle ringHandle)
	UDMA detach ring API. More...
int32_t	Udma_ringQueueRaw (Udma_RingHandle ringHandle, uint64_t phyDescMem)
	UDMA queue descriptor to a ring - raw version (Takes all physical pointers) More...
int32_t	Udma_ringDequeueRaw (Udma_RingHandle ringHandle, uint64_t *phyDescMem)
	UDMA dequeue descriptor from a ring - raw version (Takes all physical pointers). More...
int32_t	Udma_ringFlushRaw (Udma_RingHandle ringHandle, uint64_t *phyDescMem)
	UDMA dequeue descriptor from a ring when UDMA channel is disabled - raw version (Takes all physical pointers). More...
void	Udma_ringPrime (Udma_RingHandle ringHandle, uint64_t phyDescMem)
	UDMA prime descriptor to a exposed/"RING" mode ring - raw version (Takes all physical pointers). This will write the descriptor to the ring memory without setting the doorbell (doesn't commit the push). More...
void	Udma_ringPrimeRead (Udma_RingHandle ringHandle, uint64_t *phyDescMem)
	UDMA read descriptor from a exposed/"RING" mode ring - raw version (Reads physical pointers). This will read the descriptor address from the ring memory without setting the doorbell (doesn't commit the pop). More...
void	Udma_ringSetDoorBell (Udma_RingHandle ringHandle, int32_t count)
	UDMA ring API to set the doorbell in exposed/"RING" mode ring. This will commit the previously primed operation using Udma_ringPrime API. More...
uint16_t	Udma_ringGetNum (Udma_RingHandle ringHandle)
	Returns the ring number allocated for this ring. More...
void *	Udma_ringGetMemPtr (Udma_RingHandle ringHandle)
	Returns the ring memory pointer which is passed during ring alloc. More...
uint32_t	Udma_ringGetMode (Udma_RingHandle ringHandle)
	Returns the ring mode which is configured during ring alloc. More...
uint32_t	Udma_ringGetElementCnt (Udma_RingHandle ringHandle)
	Returns the ring element count which is passed during ring alloc. More...
uint32_t	Udma_ringGetForwardRingOcc (Udma_RingHandle ringHandle)
	Returns the forward ring occupancy. More...
uint32_t	Udma_ringGetReverseRingOcc (Udma_RingHandle ringHandle)
	Returns the reverse ring occupancy. More...
uint32_t	Udma_ringGetWrIdx (Udma_RingHandle ringHandle)
	Returns the ring write index value. More...
uint32_t	Udma_ringGetRdIdx (Udma_RingHandle ringHandle)
	Returns the ring read index value. More...
void	UdmaRingPrms_init (Udma_RingPrms *ringPrms)
	Udma_RingPrms structure init function. More...