diff options
| author | Pradeep Kumar <pgoudagunta@nvidia.com> | 2012-05-18 16:16:37 +0530 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-05-21 18:47:05 -0700 |
| commit | 1ad8d05518658c4cec95652de3bd020057162635 (patch) | |
| tree | e3c7e7ae45af67e6078b5c9f448a3cc78928c868 /arch | |
| parent | 52effd517ca3520d10311be1885f860414928e6f (diff) | |
arm: tegra: apbdmaio: Add dma_sync* calls
Add dma_sync* calls to make memory coherent between
CPU and Device.
Bug 983988
Change-Id: I40c514e01130762a12833c3ab7e0613f984870c6
Signed-off-by: Pradeep Kumar <pgoudagunta@nvidia.com>
Reviewed-on: http://git-master/r/103336
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
GVS: Gerrit_Virtual_Submit
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-tegra/apbio.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c index ad280d3b0840..5f3944993804 100644 --- a/arch/arm/mach-tegra/apbio.c +++ b/arch/arm/mach-tegra/apbio.c @@ -68,6 +68,8 @@ static inline u32 apb_readl(unsigned long offset) req.source_wrap = 4; req.req_sel = 0; req.size = 4; + dma_sync_single_for_device(NULL, tegra_apb_bb_phys, + sizeof(u32), DMA_FROM_DEVICE); INIT_COMPLETION(tegra_apb_wait); @@ -81,6 +83,8 @@ static inline u32 apb_readl(unsigned long offset) *(u32 *)tegra_apb_bb = 0; } + dma_sync_single_for_cpu(NULL, tegra_apb_bb_phys, + sizeof(u32), DMA_FROM_DEVICE); mutex_unlock(&tegra_apb_dma_lock); return *((u32 *)tegra_apb_bb); } @@ -97,6 +101,8 @@ static inline void apb_writel(u32 value, unsigned long offset) } mutex_lock(&tegra_apb_dma_lock); + dma_sync_single_for_cpu(NULL, tegra_apb_bb_phys, + sizeof(u32), DMA_TO_DEVICE); *((u32 *)tegra_apb_bb) = value; req.complete = apb_dma_complete; req.to_memory = 0; @@ -111,6 +117,8 @@ static inline void apb_writel(u32 value, unsigned long offset) INIT_COMPLETION(tegra_apb_wait); + dma_sync_single_for_device(NULL, tegra_apb_bb_phys, + sizeof(u32), DMA_TO_DEVICE); tegra_dma_enqueue_req(tegra_apb_dma, &req); ret = wait_for_completion_timeout(&tegra_apb_wait, |