CpswDma_OpenTxChPrms Struct Reference

Detailed Description

Param struct for the Tx channel open function.

The parameter structure for the Tx channel open function, containing a channel config structure.

Data Fields
Udma_DrvHandle	hUdmaDrv
uint32_t	chNum
CpswDma_UdmaChPrms	udmaChPrms
CpswDma_UdmaChTxPrms	udmaTxChPrms
CpswDma_PktNotifyCb	notifyCb
uint32_t	numTxPkts
bool	disableCacheOpsFlag
CpswDma_AllocRingMemFxn	ringMemAllocFxn
CpswDma_FreeRingMemFxn	ringMemFreeFxn
CpswDma_AllocDmaDesccFxn	dmaDescAllocFxn
CpswDma_FreeDmaDescFxn	dmaDescFreeFxn
void *	hCbArg
bool	useProxy

Field Documentation

Udma_DrvHandle CpswDma_OpenTxChPrms::hUdmaDrv

UDMA driver handle

uint32_t CpswDma_OpenTxChPrms::chNum

UDMA channel to number allocated for transmit. Set to UDMA_DMA_CH_ANY if the channel to allocate and open could be any from the free pool

CpswDma_UdmaChPrms CpswDma_OpenTxChPrms::udmaChPrms

UDMA channel params

CpswDma_UdmaChTxPrms CpswDma_OpenTxChPrms::udmaTxChPrms

UDMA transmit channel params

CpswDma_PktNotifyCb CpswDma_OpenTxChPrms::notifyCb

CPSW DMA event callback function - this function will be called when the registered packets are transmitted on TX channel

uint32_t CpswDma_OpenTxChPrms::numTxPkts

Maximum number of transmit packets, used for allocating number of DMA descriptors Note - The HW ring element count field is 19-bit

bool CpswDma_OpenTxChPrms::disableCacheOpsFlag

Flag to disable cache operations on the ring memory

CpswDma_AllocRingMemFxn CpswDma_OpenTxChPrms::ringMemAllocFxn

Callback functions. Callback function typedefs so that the CpswDma layer can call into the app layer and let it translate between the hardware buffer descriptors and packets and the stack/translation layer's buffers and packets

Ring memory allocation callback, this cannot be NULL

CpswDma_FreeRingMemFxn CpswDma_OpenTxChPrms::ringMemFreeFxn

Ring memory free function callback, used in close flow

CpswDma_AllocDmaDesccFxn CpswDma_OpenTxChPrms::dmaDescAllocFxn

DMA HPD (host packet descriptor) memory allocation callback

CpswDma_FreeDmaDescFxn CpswDma_OpenTxChPrms::dmaDescFreeFxn

Transmit HPD (host packet descriptor) memory free callback

void* CpswDma_OpenTxChPrms::hCbArg

Argument to be used for the callback routines (it should mean something to layer into which the callback calls)

bool CpswDma_OpenTxChPrms::useProxy

Flag to indicate if a dedicated proxy should be allocated for the "FQ" for this flow. This should be enabled only for those flows that require very high throughput as there are limited proxy available in the system