diff options
| author | Shraddha Barke <shraddha.6596@gmail.com> | 2016-02-12 16:11:54 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-14 17:43:05 -0800 |
| commit | 1d427da1d7f9f81c4f5439c9610683d3cb9c1921 (patch) | |
| tree | f244a6a7e802d870d51cdb0fe9a636148a438cea /drivers/platform | |
| parent | 288f152cadf940b38f4e5c6ea59bdeb9fd0398d2 (diff) | |
| download | linux-1d427da1d7f9f81c4f5439c9610683d3cb9c1921.tar.bz2 | |
Platform: goldfish: goldfish_pipe.c: Add DMA support using managed version
Coherent mapping guarantees that the device and CPU are in sync.
Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/goldfish/goldfish_pipe.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/goldfish/goldfish_pipe.c index e7a29e2750c6..9f6734ce1873 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -57,6 +57,7 @@ #include <linux/slab.h> #include <linux/io.h> #include <linux/goldfish.h> +#include <linux/dma-mapping.h> /* * IMPORTANT: The following constants must match the ones used and defined @@ -217,17 +218,16 @@ static int valid_batchbuffer_addr(struct goldfish_pipe_dev *dev, static int setup_access_params_addr(struct platform_device *pdev, struct goldfish_pipe_dev *dev) { - u64 paddr; + dma_addr_t dma_handle; struct access_params *aps; - aps = devm_kzalloc(&pdev->dev, sizeof(struct access_params), GFP_KERNEL); + aps = dmam_alloc_coherent(&pdev->dev, sizeof(struct access_params), + &dma_handle, GFP_KERNEL); if (!aps) - return -1; + return -ENOMEM; - /* FIXME */ - paddr = __pa(aps); - writel((u32)(paddr >> 32), dev->base + PIPE_REG_PARAMS_ADDR_HIGH); - writel((u32)paddr, dev->base + PIPE_REG_PARAMS_ADDR_LOW); + writel(upper_32_bits(dma_handle), dev->base + PIPE_REG_PARAMS_ADDR_HIGH); + writel(lower_32_bits(dma_handle), dev->base + PIPE_REG_PARAMS_ADDR_LOW); if (valid_batchbuffer_addr(dev, aps)) { dev->aps = aps; |