| # DesignWare DMA common configuration options |
| |
| # Copyright (c) 2022 Intel Corporation |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| config DMA_DW_FIFO_PARTITION |
| bool "FIFO Partitioning" |
| help |
| FIFO partition feature |
| |
| config DMA_DW_LLI_POOL_SIZE |
| int "number of LLI structs in an allocation pool" |
| default 2 |
| help |
| The number of LLI structs in a statically allocated pool. Each channel has its own |
| LLI struct pool. If during dma_config() a log notes there are not enough LLI structs |
| then this should be increased to match the need. |
| |
| config DMA_DW_HW_LLI |
| bool "hardware supports scatter gather" |
| default y |
| help |
| The hardware is by default expected to support hardware LLI (scatter gather). |
| When not enabled the driver will still perform scatter gather but using software |
| to run through the scatter gather list. |
| |
| config DMA_DW_SUSPEND_DRAIN |
| bool "channels should be suspended and drained on stop" |
| help |
| Rather than immediately stopping a DMA channel the channel is suspended |
| with the DRAIN bit flag set to allow for the hardware FIFO to be drained |
| before stopping the channel. |
| |
| config DMA_DW_HOST_MASK |
| int "memory space mask" |
| default 0 |
| help |
| Some instances of the DesignWare DMAC require a mask applied to source/destination |
| addresses to signifiy the memory space the address is in. |
