From: Guo Ren <ren_guo@c-sky.com>
To: tglx@linutronix.de, jason@lakedaemon.net, marc.zyngier@arm.com,
robh+dt@kernel.org, mark.rutland@arm.com, arnd@arndb.de,
robh@kernel.org, sfr@canb.auug.org.au
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-arch@vger.kernel.org, c-sky_gcc_upstream@c-sky.com,
gnu-csky@mentor.com, green.hu@gmail.com,
Guo Ren <ren_guo@c-sky.com>
Subject: [PATCH V7 1/2] csky/dma: bugfix dma_sync_for_cpu/device
Date: Tue, 18 Sep 2018 21:48:13 +0800 [thread overview]
Message-ID: <1ccf1bed89758a5a9b57ac2ce6d11ca898a1b9ae.1537276837.git.ren_guo@c-sky.com> (raw)
In-Reply-To: <cover.1537276837.git.ren_guo@c-sky.com>
In-Reply-To: <cover.1537276837.git.ren_guo@c-sky.com>
ref: https://lkml.org/lkml/2018/5/18/1068
map for_cpu for_device unmap
TO_DEV writeback none writeback none
TO_CPU invalidate invalidate* invalidate invalidate*
BIDIR writeback invalidate writeback invalidate
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
---
arch/csky/mm/dma-mapping.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/csky/mm/dma-mapping.c b/arch/csky/mm/dma-mapping.c
index 16c2087..30a2041 100644
--- a/arch/csky/mm/dma-mapping.c
+++ b/arch/csky/mm/dma-mapping.c
@@ -217,7 +217,8 @@ void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
break;
case DMA_FROM_DEVICE:
case DMA_BIDIRECTIONAL:
- BUG();
+ dma_wbinv_range(vaddr + offset, vaddr + offset + size);
+ break;
default:
BUG();
}
@@ -240,7 +241,7 @@ void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
switch (dir) {
case DMA_TO_DEVICE:
- BUG();
+ break;
case DMA_FROM_DEVICE:
case DMA_BIDIRECTIONAL:
dma_wbinv_range(vaddr + offset, vaddr + offset + size);
--
2.7.4
next prev parent reply other threads:[~2018-09-18 13:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-18 13:48 [PATCH V7 0/2] bugfix based on csky linux-next Guo Ren
2018-09-18 13:48 ` Guo Ren [this message]
2018-09-24 20:38 ` [PATCH V7 1/2] csky/dma: bugfix dma_sync_for_cpu/device Arnd Bergmann
2018-09-25 9:46 ` Guo Ren
2018-09-25 9:59 ` Arnd Bergmann
2018-09-25 11:38 ` Guo Ren
2018-09-18 13:48 ` [PATCH V7 2/2] csky: remove irq_mapping from smp.c Guo Ren
2018-09-24 20:23 ` Arnd Bergmann
2018-09-25 9:17 ` Guo Ren
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