diff mbox series

[03/21] sparc32: flush caches in dma_sync_*for_device

Message ID 20230327121317.4081816-4-arnd@kernel.org (mailing list archive)
State Handled Elsewhere
Headers show
Series dma-mapping: unify support for cache flushes | expand

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conchuod/maintainers_pattern success MAINTAINERS pattern errors before the patch: 1 and now 1
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conchuod/kdoc success Errors and warnings before: 0 this patch: 0
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conchuod/build_rv64_gcc_allmodconfig success Errors and warnings before: 18 this patch: 18
conchuod/build_rv32_defconfig success Build OK
conchuod/dtb_warn_rv64 success Errors and warnings before: 3 this patch: 3
conchuod/header_inline success No static functions without inline keyword in header files
conchuod/checkpatch warning CHECK: Alignment should match open parenthesis
conchuod/source_inline success Was 0 now: 0
conchuod/build_rv64_nommu_k210_defconfig success Build OK
conchuod/verify_fixes success No Fixes tag
conchuod/build_rv64_nommu_virt_defconfig success Build OK

Commit Message

Arnd Bergmann March 27, 2023, 12:12 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>

Leon has a very minimalistic cache that has no range operations
and requires being flushed entirely to deal with noncoherent
DMA. Most in-order architectures do their cache management in
the dma_sync_*for_device() operations rather than dma_sync_*for_cpu.

Since the cache is write-through only, both should have the same
effect, so change it for consistency with the other architectures.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/sparc/Kconfig         | 2 +-
 arch/sparc/kernel/ioport.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 84437a4c6545..637da50e236c 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -51,7 +51,7 @@  config SPARC
 config SPARC32
 	def_bool !64BIT
 	select ARCH_32BIT_OFF_T
-	select ARCH_HAS_SYNC_DMA_FOR_CPU
+	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select CLZ_TAB
 	select DMA_DIRECT_REMAP
 	select GENERIC_ATOMIC64
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 4e4f3d3263e4..4f3d26066ec2 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -306,7 +306,7 @@  arch_initcall(sparc_register_ioport);
  * On LEON systems without cache snooping, the entire D-CACHE must be flushed to
  * make DMA to cacheable memory coherent.
  */
-void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
+void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
 		enum dma_data_direction dir)
 {
 	if (dir != DMA_TO_DEVICE &&