VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Arnd Bergmann <arnd@arndb.de> 2023-03-27 14:13:00 +0200 committer: Emil Renner Berthing <emil.renner.berthing@canonical.com> 2023-07-20 20:53:34 +0200 commit: dab3ed35c091709f62faef4de3fa8858ffd0779d parent: 1304f1702803644819ace952b6a8e6e753f7aeb7
Commit Summary:
microblaze: dma-mapping: skip extra DMA flushes
Diffstat:
1 file changed, 12 insertions, 10 deletions
diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index 04d091ade417..b4c4e45fd45e 100644
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -14,8 +14,8 @@
 #include <linux/bug.h>
 #include <asm/cacheflush.h>
 
-static void __dma_sync(phys_addr_t paddr, size_t size,
-		enum dma_data_direction direction)
+void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
+		enum dma_data_direction dir)
 {
 	switch (direction) {
 	case DMA_TO_DEVICE:
@@ -30,14 +30,16 @@ static void __dma_sync(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)
-{
-	__dma_sync(paddr, size, dir);
-}
-
 void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
 		enum dma_data_direction dir)
 {
-	__dma_sync(paddr, size, dir);
-}
+	switch (direction) {
+	case DMA_TO_DEVICE:
+		break;
+	case DMA_BIDIRECTIONAL:
+	case DMA_FROM_DEVICE:
+		invalidate_dcache_range(paddr, paddr + size);
+		break;
+	default:
+		BUG();
+	}}