[RFC PATCH V4 3/6] RISC-V: Support a new config option for non-coherent DMA

From: guoren
Date: Sat Sep 11 2021 - 05:22:23 EST


From: Atish Patra <atish.patra@xxxxxxx>

In future, there will be more RISC-V platforms with non-coherent DMA.
Instead of selecting all the required config options in every soc, create
a new config that selects all the required configs related non-coherent
DMA.

Signed-off-by: Atish Patra <atish.patra@xxxxxxx>

RISC-V: Support DMA_DIRECT_REMAP for non-coherent DMA

Signed-off-by: Guo Ren <guoren@xxxxxxxxxxxxxxxxx>
---
arch/riscv/Kconfig | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 3ab3730bee92..d18a59ea10e5 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -213,6 +213,15 @@ config PGTABLE_LEVELS
config LOCKDEP_SUPPORT
def_bool y

+config RISCV_DMA_NONCOHERENT
+ bool
+ select ARCH_HAS_DMA_PREP_COHERENT
+ select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+ select ARCH_HAS_SYNC_DMA_FOR_CPU
+ select ARCH_HAS_SETUP_DMA_OPS
+ select DMA_GLOBAL_POOL
+ select DMA_DIRECT_REMAP
+
source "arch/riscv/Kconfig.socs"
source "arch/riscv/Kconfig.erratas"

--
2.25.1