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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2021-06-19 06:50:41 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2021-06-24 08:53:47 +0200 |
| commit | 963b55822f6db510c9aff6a6a75aa4d7a5efb460 (patch) | |
| tree | 4e87f82380728a0849b08390393ee86d21e34807 /arch/riscv/include/asm/io.h | |
| parent | d5306194c6e17597eb67a18279f4ecf5dee69539 (diff) | |
| download | barebox-963b55822f6db510c9aff6a6a75aa4d7a5efb460.tar.gz barebox-963b55822f6db510c9aff6a6a75aa4d7a5efb460.tar.xz | |
net: designware: fix non-1:1 mapped 64-bit systems
drivers/net/designware.c handles the older Designware < 4.x MAC IPs,
which do not support DMA beyond 32-bit. They are still being integrated
into SoCs with 64-bit CPUs like the StarFive JH7100, which additionally
needs a non 1:1 mapping for coherent DMA.
Fix the driver to support such usage. The driver still has the assumption
that barebox core will only pass it 32-bit pointers. This is now made
explicit by returning error codes when the DMA mask is violated.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20210619045055.779-16-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/riscv/include/asm/io.h')
| -rw-r--r-- | arch/riscv/include/asm/io.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h index 3cdea7fcac..795e670e3b 100644 --- a/arch/riscv/include/asm/io.h +++ b/arch/riscv/include/asm/io.h @@ -5,4 +5,14 @@ #include <asm-generic/io.h> +static inline void *phys_to_virt(unsigned long phys) +{ + return (void *)phys; +} + +static inline unsigned long virt_to_phys(volatile void *mem) +{ + return (unsigned long)mem; +} + #endif /* __ASM_RISCV_IO_H */ |