diff mbox series

[v1,4/8] riscv: Add DMA 64-bit address support

Message ID 20201016142315.30289-5-padmarao.begari@microchip.com
State Superseded
Delegated to: Andes
Headers show
Series Microchip PolarFire SoC support | expand

Commit Message

Padmarao Begari Oct. 16, 2020, 2:23 p.m. UTC
From: Padmarao Begari <padmarao.begari@microchip.com>

dma_addr_t holds any valid DMA address. If the DMA API only uses 32/64-bit
addresses, dma_addr_t need only be 32/64 bits wide.

Signed-off-by: Padmarao Begari <padmarao.begari@microchip.com>
---
 arch/riscv/Kconfig             | 5 +++++
 arch/riscv/include/asm/types.h | 4 ++++
 2 files changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index aaa3b833a5..7ab1ccff40 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -152,6 +152,11 @@  config 32BIT
 config 64BIT
 	bool
 
+config DMA_ADDR_T_64BIT
+	bool
+	depends on 64BIT
+	default n
+
 config SIFIVE_CLINT
 	bool
 	depends on RISCV_MMODE || SPL_RISCV_MMODE
diff --git a/arch/riscv/include/asm/types.h b/arch/riscv/include/asm/types.h
index 403cf9a48f..b800b2d221 100644
--- a/arch/riscv/include/asm/types.h
+++ b/arch/riscv/include/asm/types.h
@@ -29,7 +29,11 @@  typedef unsigned short umode_t;
 
 #include <stddef.h>
 
+#ifdef CONFIG_DMA_ADDR_T_64BIT
+typedef u64 dma_addr_t;
+#else
 typedef u32 dma_addr_t;
+#endif
 
 typedef unsigned long phys_addr_t;
 typedef unsigned long phys_size_t;